Spring的资源抽象Resource2实体类

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b1zukfuhSmurAqcfqZ5j1S1POuYlY4AAC834oE+F5TpX8OqWEsHQAI+Rx2keeBcQAA6IN8DhsjjYM++DI0ABDyOWyEtzWhIU5IAPi/QxcAK3ody6pYVqXRO3RJVrxznKzdOzWubQAAYiKfS87kply+mWz6K79ho/ZXe9x3nP51NcnSZQ21DQDAXHA+d3d3l8n4zoaN4ERh2CjfTAqn9/enhR33MJk+yKPH229l2il3gnqawuI72Vs9K9T2jG7Xkc5x77vVOpSHOHHixNOJM/9cTNNO+XVrULOdZjUsPrkpv5LPn+XVK3n55KrVFRGp2/3rqlpGRKTU/nT/fFguXg1ERI7b449NuSnPlq/Zzs+31nlXbbh0Zr/8VmuNxF2yICLDxnyBut2/Lt4sbWqWlwwb1nm3dDb2pzth8bjiT4e28zx/1LYI889ti9cjAOQQz1vX6zUqlvW7fO47y+lFWFwGV6MXfcfpO3at+9vNRI6an89KpbOx079vThvFv986fcfpO+Onf7y6mSyWb1bl5Ho8W9K5P602PzpqSftR68NQZNopn4vdV8Hr6jBgUyIiJ9dO3/ksr6yK1Rh6ihUW1wu1jR0xAyKAHOL91mjDhnUudt+5jhkXEZHS2a8q4yj+VPL9ajJ9ELtr2fP/r43lp8Xy/oXdDiGR0k+TyfQPOfvsLhmwKVl0BRVO751T6XUs6/tSL1dYXAvUNpJB/xyAvKF/LtrJtdN/cVuxrDedSZx4DKpDaPYTfo+f3JSL316OVYfQmT9TWbupyU3Zqli3P8eNa4HaBgBgG+Rz61Wv+47zH3lVsaylQe5h8WCDv8ciUjh6Mrj6EHOofOnp84KIyOTLt4GIFE5eimfd0E0NG1bFeiWfnb5zfRIjrhdqGwCATZHPxXTUvO87zs+3/jcuw+LLCqdv63bNqpQ7R9fjs4daRc15ZkWsVTh9++SqaFUsq/Jq9Kik9vV5sW6jdxK0qWmn/P2F03f8w/DD4nqitpEMBtIByAneb0VcKb7fChHeb00Ir7sCyAPmn8P2qOd06HYdmRVffd1Vz3ISJ06c+C5x+ucQF/1zKaN/DgAQE+PnAAAAzEY+B8OpOUF87zr0OhYT+QIAcoN8btiw5i8tbpwBqHW3+KbO5RVVRrL42XyWNb31GuoVURGRSefNop7Vga/UuVqm3JnuUMORsl7hCMPrrgCyKuf5nPqCzuP2eD5P7AGnClPT1Y7PSjJqFZPOYA6qeHwsIg8/piIyHo1ERB6mk/lMb6XjI9/yheZHx+nfN/3xhGW3whGGrwIDkFW5zucmnf92RUrt/zQLvvgbt/Om3JmKzJ/fld+UPdOP9Rrqy9rtmtuHpBZbWmaxkdlmyzed1RVdhaMn3v9d2aDMt+ktXmiBG0Pxdo+5jyZ7nbACB+5xR4XnT0sig9FUZHjblVLpWM33Ox6NRI5fPj/yF2xeeH8NL/erzY5UGcxmjwsoc/QRZbHCEYGUDkAm5TqfU31FTx4v9wP1OsXWSOqXjtO36zJovW4sEq6nn52+XRcZXH3oSfX6si4iUrPVF0BNbso1u9T+pL4bXgZXrzrT6rXayO+dyfBDaySls/H9adO3onfvk+mDiNR/ropI0AYnnTe1rsyCqhMrqsCBvr2q2epIrZo9/xqrT+0nwXvcuZrnOdPDdDKZPsjxy7dPS/LXj8n0x4OIPHq8SKbnBZvz13Dh9H72dVuf2iVVq/NFS2djpz9uH/vLvPaIMlnhiMRbwwCyh/nn/Hq3tojUX5yISPVFTUS6t/MBXk+OIqb7V08PB63XllWxarbMeqSkev2pXRq1iuddqdkRXxigepiKV4P6pXrsG7ZBmQdVz1BUgYN39Oit03ecpqgV36oiHTWvTyV8j4Fi1/PJi7rI4O/x+O+BPHpcPXoio9F4OhrME6nlgkV81em8Y+x1axDw28LjR74yR9ShQRWu23VEnDhx4sR1iwfnc8+ePctk3Mc7rispbkeOZzTedBSUfKyseTZW3wTfPff29/g2WGh+dOya+tWg9XqbVzhLPxU3PoRgMetZZlX91+3tX1L6qShHxyV5uP3+4Bs8t65gk86bYmukimfXY+5ZJOyIzKlw3a4j4sSJEyeuWzzXz1sLzX/XZfmx3XKPi7cnZv3WVOdQ63++h2+9xnlXarZzWRe7tu6LR+/tmoh0a286k9ANSrXpzAbyryvwwzRid7MVf5t/FWnjRsL2uLPC86clGXW7I3lyVJCjx09k0LUHavBcbLN3KURE1LNav9X2Cq3D2a8zW+GIg4F0ALLDyZP3IouOkNnP5VJHT/3SUcOw5hZjm+a/VT1Ddbu/vGTN9tzy5+tetksrC7sjvdwV1VqzYVVuz9Nxe7y6wU/esrmrBBTY+dT2rqnKsLyjxXF5t7ayR7eu3sc+WyLqWVXFfL9qYNxKwTy1vVzDbmMdl0rBVaTW8m4h4IgyV+HYGpUMIBv4vi/Exfd9pYzv+0rHhWVRzwBMl+vnrQBAMgcgA8jnAAAAzEY+BwAAYDbmn8P2qOd06HYdZTge+MarhuUkTpw4cV+E9yEQF+9DpIz3IdLHuxEADMXzVgCYece3uwIwE/kcACzQPwfARORzAAAAZiOfAwAAMBv5HAAEYywdAFOQzwFAMF6PAGAK5p/D9qjndOh2HeUqHpHSaVVO4sSJ5zzO/HOIi/nnUsb8cwCAmHjeCgAAYLZ/HLoAabuwKocuQi5QzwAApCZfz1t1s8WXC+Xh+4jc4UqZP1KYJQ9XHwBD5a5/Th9bvzenVszSfcVXFWoEepYOENnAmQlAW+RzRsrMfSV7uSmyLTOXHoCM4X2Iw9hlUiv3jpKBmbHeOY57a3QPh/sldMbJCUBD+Zp/TpP42nwl5nZUSndhWZoc1y7xwDrRsJzEiRMnTpy4hnHehzgAN3dJ6n0I0zu0vOU3/VgAAEgfz1vT5s1XtnhmGriK6c9eSeBgIqMvOgAZQz6Xqv11PmUjJaJzDgYx/e8oAFnC+62HkUjiYm72w2utB0cikhRq0kR8+CB7yOdSleyHiKFTJ4SV2cRjMRrfsYt84ttrkEk8bzWP6UlPWPlNPy4AAA6FfO4wvK9EJLIdAACQW8w/l4V4GE3KqSbJ06c8xAG4dLseiRPfLs78c9gvRsXp6cKyGD+HfLqwKnwoIXt43noA+3ghTtuX7PjchNZ6HcuqWI3hocsBADshnwOQE9NOuWJZFcvq9Oah3q0tIvUXJ9FrTjpvLKtS7kx32b1vI72GKsz8p3wz2WXrAPKNfC5te3r+qNXUpvqUBHBNOr+3Br7Y8LYrIrUX1ehVp1/+GIkcv3x+tMP+fRuZ7dp2+o7zqV0SGXz7QkIHYFvkc2nb3/NHHZ5sqlcfdCgJsGRy86o1knqt7g32vndFROya6iGbPXV1u/EqllVp9Kad8uvWQERGrWLFKt9M3Ee0vY5VvplMbsqWd/n5DjtvFn1vjZuVjXzvikj956qIyHQ0EJFHjwuqVB3PioFF8m/fGyl3pvPl33QmngfKqrT+gg1D9gjAMORzSNI7xyGZg36GjeLVQGr29c/e6Oxhq913nMu6iHS/92TYsF63BqrbrO84/evq0fOXxyJSan9ynL5zfzq+tUVEuudWzS69PCkUTu/VwuOzkkj3dqjSqWJrVLf7jtN37Fr9xWngRtRz3l7jvCtSt5tV9RC2Jmrvdl2k+9/OZLVIavvSHs93+tvNxNv/Nxn+MRApPX1emB3jvLRHX/wFOwnaY7qNAyAJfD8EgIzzJEzDWxGRv35MpFrwPGydTB9EpPRTcdFjZ0v90rk+CX9O2pw9pO11rJrt7qv+4kR6ndZApH55rZaoNq9l2vltdSPSrVW6IlI6GzunBRHpdWrd+d6V0tPn4++t5SKpB8el9n+aBRE39/LkcJPOt4FI6eVJQYYfvKXtdSxfwXoda3WPheSqHkBamH8u7bh3bJmJ21+Nr46W06GeicePZ9wsSZJurWJZ591FfPHEc/JlngBVm+P28WyB7nm5M/XmSb61ZNadZpfan2Zj4KT2ojrt/GaLHLd/9bxjEbyRS8euiSxGznn6C+c/96crRRp680u35OIegjcBXX6qu1qw4D0mVvVm0O16JE58uzjzz6UqhbFlaQ5fU5kcD1hNlJf55yY3ZfWkddadNmxY5105bo8/Pv5QqXWlbvevizfl4tWgdDb2pDK9RqXWPW6PPz7/8qbYGpXan+6bR/O41O3+ddXdWs12mlW1o/qlc32khsrNlul1GtL89UfYRuaD8zwruov5zIv0H3n1ujU4bo8/NsUt+ckXd6eewxkvlXa6UrB/Hf8WtcesYv45ZBL5XKrSSbZ4IwFr5SOfW85gRDz53L9HRU9fnUrmlp6cep5RzoLuWm526L4qMTPb0SyJ9GwnfCOTzptiayRy3B5/bBZU8Tylevt3MapIMn8oPMsRF6u2P903p4t0U0VXCyYre8xB/xz5HDKJfA7Io3zkc0AA8jlkEu+3YjPMLQcAgG7I57ABnuQCAKAh8rn0pNyzlfjuSOYAANAT+VxmJf4NYCRzAADoifnnshwPE387KiPU7biIJxsH8ky365E48e3ivN+KUDxgzTDeb0Vu8X4rMonv+0IwkrnMu7Aqhy4CACAZ5HMIRjKXefTPIZ/4SwaZxPsQKTngtG3MGAcAQLaRz2VfzBddLyyLzA8AABORz6Xh4GPR1qZ0qoQ8YwUAwETkc2nQIU+KLoMOJQQAANth/rk04mF0KyfxfMaBPNPteiROfLs488/llHr8SrdcbjH/HHKL+eeQSTxvTYM+7xmokjBaDgCALGH+ub07+MsQq3QrDw6CWbgAIDPI5/JFvehKPgdhPmHkFX/JIJN43rp3miRP7jNfTcoDAACSQv9c9vHqAwAA2UY+l31kcgAAZBvzz+03rvrGdJtX7O7uLvCVW33qjXiacSDPdLseiRPfLs78c/t1qJcP4uyXFyPyjPnnkFvMP4dM4nlr1jBaDvG5L/qR2wGA0cjn9iv9vCr+Hsn5IPPTwPf8nfQOWvHOMMLJCQQinwPgT+5Xh1dyE0U6AieHc89Pfb5rB9AN4+eygJFw2JT3vhjn5OE+inREnI0JnoR8YCJ76J/bo3TSrB33Qi6YT5t2eIR14O313FtbtkOdummOUk35Ct09Z4rfplscFx9WQBjyObPt/lnPN4Bha/s+96K7ag715rjMS57+TlPY144fCHFScD5wgH1g/jmz4+pjUZ/yEDcxvil1P169JadWHl9CkEK9XViW+lEHrv6RWnu5O93T9n1++fp1u2w1Zruo7e+eEOt2HREnftg44+fMw1+3SNBGp1PiHUWbnszpT8cTuMc0r0Hvvg613z2tsum5x+ceEIF8zjB8qCEpm46B29O5F3+zKWcz6h+re0z/GvSldIGl2vd+k114i7X46AOiMX7OJHyiYRcrk8zF7fXRYZLq1E5+HQ42gjtfYAolTGGsm/scOf5L1to2DXBY5HP7so/PwX1/kJEvZkxYArfpRg5+VqRQhkTe2E3NRmnQ7jvad0on8Zp4de5rIxoLSAf53F7ocAtEDiWSwPm2tqcz2Zs/RV8v+76aNjpMfS7t1Drq4qR0+37R3vsr7zLkdoCLfE5rKT9fYCoB4ySbwPm2vKfRcuofOuRPGXh+l05HXcyUbsdibHEs5HaAi3xuLxL5NDlIasXnoOb2l8D5dpHslrd7mpna4C1NyrOddDrqIlK61dc1ZNvzZ5djIbdDzjH/nI5xZX/zexE3KO7OfOad/0z9/PL1ayL79c435p1bbvfyrxY7cPnVvMpda5fjihPfNKXbd3nixANFHEia89K5DR0xw1yc+fbiNErEdryXiffy2a48xIkbEWe+EkAvKfTARew0qa7lTbd2qFnWNtrjAfvn4pdQ9nzOrJYketyb+sd2U5lI0oNA6LdDhvG8NXlbf/roM5pHz+dKWXWQBG7V7vtNJCk81DCDFIb8pyCFZ6++uorel+857EalWn2bdXc8k0WGkc/pwoi7BRKhSQKXVBkSSeNSm4AjugA6tMUutJ3ExJecbfTGQ7IpnbvRKcQAAB45SURBVK9ICrkdMoDnrcnLwF1BsnIUmtAwgdtd4hO26XDKxRnyfxBxCpByIXfJHfV5FrGK3A6GIp8DkpfJBE4xa97djah8KDAr0jyfO1R6tGO16JzVKeR2MAjPWw/p4DcJJCXDCZyS4TROcS9Gsx68Hvwh9e6r63xqBT6T1bCcgJDPHYr+f5giWuYTOCUn9zBfArfRkP8DcjsUD12QnezyzkSaVufYE41Lixxi/rmE44GfravLq4mRNCy/L6IOR5/yHDCewjxw+sRjzht38HImEnfTtU3npUuznL7ypDY/X5rxX75+9U4Xd/DyRJdzdXI73cpJPG9xxs8lTNs/5beWvSOKKSc9cF456Y3z0nNcWiC3qBvNAGcurSo/DvrtcFg8b01PJj9zsySHCZySwzROWXtJ6vY0MyzFMWvMX0z6j67zYQIUHBb9c2kw7g/NnMhtAqcYdKfcB+MSoLVdiWYdzqbM/RQlt0M6yOeQIzlP4JScp3FKJrOfTB6Uj+lnL7kd9od8DllGAucy/UaYoAznPRk+NB9zu+tc5HZIFuPnkmTEHAfbMeVwSOB8SON8TDmTEc07us7QBmW8HZJF/1xiMpzMKXoeFAlcINK4QHqew8nKwzH6ZOxsJ7fDdph/Lvl49uaFUvHVd/2YB063eK7mjds0HjjPnIblJL5p3Dcb3MHLs2Oc+e2Ibxenfw66owdurYz1T+xDrnqtcnWwq7J6OdBvh2jkc8nI+QdoskjgYsrqfStxObw8c3jIq4weXReN3A6reB8iAXx07ogEbiOkcRvh8swt42Ykjo93KbCK/rlduV+JnZ8LafeDJYHbQiZvS/uWqwvTJ8/HHijD3XUucrs8o39uV1wzcZDAbY00bms5T2jy9nfmWhnurnPRb5dn5HPbyPmnZJz7BAncjrJ910lBzi9ShPHOKiWZvr4Cc7sMHy943rox7hOBSOASwcduIrhIXVRFtMxndT502mUY889tFlcfjvqU57Bx5oFLKs68cQnGmWeOePy4+rxyL8CDl2ffcXW8q5Pb6VZO4lvE6Z9DXPTAJY7euMTRHbWKOokvb911LvrtMoB8LgFZ/bhcm8Bl9cD3jTRuTzghw1AzG8n5FUpuZyjeh1gjV3+ubdoDxwt0G8n5TWLfOBWRlPy8MxGIl2QNteif893LkYKwy4O2QEyBpxDnTzq4fnUTP+GgjTQU0Xw5b6+YJ/ZS/9w7p7+fwmTbP0X+3GK1C6sS8Vuj2mLLGsCOIk4ho84fI2Xo+s2I6BZZRRvtwlvbidTk2ubLbXvFP7F53goAADbgza4Sz+2wHfI57O5PuugAIJ/I7TQRPP8c4tvluX7YvDLGyfngBuRTZq7fjNl0Hi8k6J3Td38urIr7s8WmaK9oq/VD/9xOLqzKLn+CPHv2LMHCHJC6dPlrDLmSmes3Y8LahfZK2Y79drRXtNX62ap/rtexrIrVGCZQIiRCyxaZdN6kXKr09wgAWCvBfrs4ZvcCq1LuTPe0Cw2F53MqRXB/yje9zpu4tbO87iYVOmxYFcvq9GKvEGByU/aW3HrTmeyyuSiHmI9n2imr41rUUu/WFpH6i5PoNSfxWzD2RnqNWT2/FxH5Z6OnWvBNZzL98sdI5Lj9a3Cp3BXdE2znVoreo1uwDba4h0Iewsq1HH4UsS/A+TYbO12rQVK8flOyQf1vY911vdSm23wIZK9FVixd6Qk00Mp1FHBPTOJmF4d+zReY2221JV8dqpvjm85k+KE1ktLZ2OnfN4/8K+lXIUlZ1z9Xv3ScvuP0nfvTavOjE1g7Pr2OVbMXK8ZZZR9KZ2On74zPSjJqFfd/zezG+z160WPRJp3fWwNfbHjbFZHai2r0TmbpzsvnuzTH8kYmN79151Xt9EXkunpy7fQd52NThn8MREpPnxcCtzMrs+30HedTuyQy+PZlx4tqEr3HecGCf5tWIQ+ofuk4fbsuMrj6sPP1oP6EEJHub/vJcY26fmNRH4njs9LgqpjoXbwQ85N584WXZK9FPKrXfceuiYjUL5370w0+JOLQ4Z6oa/O5iZ0s3wfjrX3yoi4if/1Qn0HqFlD/d1OmDyLy5CiqHXWtkJ04c+9F3LPNcTwn92rE+yv1b6V0Nnb64/axiJTanzxb+9Quichxe9yffaLNF7brnrXbn7z/O7uPrmx/vvpxyV3MXWZpAZVkXNbdTQVubaUMzvwQvBHvIavl63bfGZ85jiOls7FdCy1t0B7Vz3sR98dZ5m8L90cdWr0WelCLJlN1Po/ZS/87L/O8NUtnY7XlxfKzPXqrQupnvo3YAW3tqMjSaeAtofe0mRU1vI2Cj8VfMG+k1L5cOtnU1rxFjVFds9X3WMhPSxeFry381b5yoc2vyvcrZ866a9ndafAl2Y5zAS6Wr9UDr2t1OQT+r7slXw14V0/x+l0q4ebXb2Dlr/0sDb00wo/Iv5iv5O72lyt59TPWs/DsWp5d6fPLJPiQzW+R9W3ka6ZZhczvMt56CCzP8oH46rwd8Dm50i5xjj3gItLrhphg871fvj8GtJfnELylqtuXniM4bo9XjsiQCtnixF6Xz3kLvZrPjc9Ky8ezer9cPVpVF3U7MPNbrtzA7c/O6ZrtVmtYJS4SoMuwrQWUIbBhgoLvRTwX0vwqmjXJp3Z99rHrL/8W9wN/5SzV0qKQIQsE3EUC7xneW/Xi3r/4xF9pstUc6FO7JO9FvOmCXfcVdXGBqS2v/Nu38OqxePKARVsHZiqXdf9vA8+TwA3utZARf9VcrlZ7YB1unM+5VlJq95KMdQF6zqWl82HpvuLen45L3g36aiawDGldv/4C7+/69f1tHPn5GXpEKwXzl9zN5/x/VwfdsZb/LPfVSfBHrsktEuszNiCfW/4cCKzewAOJyBIWZQ641nyXT9iRBny8aHBD3OsFFdBe3tvioqVqthPSUr57nPYVssWJHfd5a2D/8OTLt4HIoPXasipWzRaRwWgq1eb8TBVRv20MpfpzXUS633uzB3aLh4Nq9cDxHMHbV0o/FeeLlY6D+q4HV0WrYhWvBvVL5/okemveMnjHolVf1ESkezuMqqLBo7dO33GaolZ8q/rqj5rXpxJR/s31GuddkbrdnNec6mT2PGydTB9UzfS+d0VE7Nri5QDfw1bvk8T+ffNoMbyjeDVQh9/7X2sgUr+8VvurNq+rvoet6vmm+yfF/BmryHP3Yeu4U+vOS2JVal2R0tPnBbV36dYqllWpPZyNnf51VaQXtPDYfyzqiXOp/Z+lJ6dBD1t7jfOuHLc/nxYWv11UlzofSi9PxLNBN1iQ/RZyZUfztnj83V/tEliHm59A7o2qex59SS7KG3wCL06DwvOnJZHBH8PFI9f55VBd+d/5COXXiwEDEWXI3PW7arMj8hSssFzywHEWhceP1hTYU/k/HsR7UQQfcg5axC/8gd366vUKvCcGmh97MeRIAy4iJdM3xHdR49RPfm0fy+Dvsfogrf8ceDkEpBkmV0iYBOafW8oor9VQdDVWaZ6fPkwnqtLFvm38rzWQUvtfVTWSY/6HS8QpHrT9OMWa/xXbPfcO2fZtLWYZIne0uJA2Lf8G8+vM0giVXpx3F/HvXZmdxIsUodpcdAh3z8udqT/d8awlaixwzfY8Aqu9qE47v9n+dwuWN+LJSOa///JtIPJn+9P/K16pX43VGWx7/tq4Py3M9j7vIZgPSusFLuw/lqE3p1zkZIvCHD1+IiIiXzq1rtTtj0tZWu97V9Tp5yYl4tmgJ2HdbyFXd6TaIqDag/cY97xZUfwp4pIM5D+BVaIvo1Zxlv0vDcjzXQ7z/5103hRbI7UpT39keBkydv16TH78JZ6b7vZHtK7k68wrvzP8Y7nygw/ZhBZRtJx/bvWeGGT52H1HGnIRxWNO87litlfh+dOS2Led6YMEvBQYekQGVojPav3slM/N/kZp/S90LOH474HM/spRf8p3u/bSkPxqc3GKb7H9NeU7vbdrItKtvelMwre2XAZvxu1/b3T5IvT90TBbcTY8fNpp3Mi68sedX2dyU67ZnodWiz/1FiWc3LxqjaR09rl5JPNRz+rZ3MvnR77ca/m4Zv1Db5tH8/Gk7p84o9FYrdBp9HwJ3OrbFYsM6Z3jqH/8eBARefix9DfHYu/Vf7VLIjJqfRjKrJPAv/DqsXirZX7IslKYUatlz3u5FgVT2dLL50ee3HQ6GojIo8eFpYR1b4WUJ4+Pgne04K320D1ux9uIwZek96CCTmBVYPczSCWya/5CFRmPRvN/zo5otouIMuz5+vVvZn/Xr5fnOt3siDwFi/MCSpx33meV37oazCt/zUeu9i2ipDD/3EYHssRzT4wQWLdhF1FchjSfK257FU5eltRpHPJSYFiaYVqF+ATUT9wxH07wwIvVEZq+vxu8uefsV8vjgufLzR7beYKeB+HerYU8Gg8eLrD4O8Y71GCxtXVlCBsrJo7j+Ha0qCLv1gJHsK57KL7cFsvj2Bb5nDtsa3mPS2M1VgdwrA728h/abEdLJfeN5Txu2yvHvjye3XEcz2hTbwmX9j6vas9wN+/Ca45l+ST0NZ9/8P7SQPvVM2e5jfZQyBg7Cq72gDpccwq9jx4/59mC75KMcQGezc89X4E9A7p91e7/I+S4VFragr8MqVy/qx8Ue7t+o+o/5hGFvg/h+2T23bECPmk9g+1CToDoj1xDW2RtGy1dm97XxVbvLP7qDf789NZ5PeSeuNQuq8cecKRBF5EeN8R9N9/70PFzixIutrZSJwFl0L5CtjixLWfeyXRhWe/2O7//tFN+3RpI3e5fr5lZwwj/3PEbSy+syruQYQH7b4sU7Fo/qRs2rPNu6Wyc+GwFexN2CsU+f3S4JHUowzZ0vH4nN+Xi1cCoczhBES0StPDmbZTv6t236ObLxD1xS/FP7BS/v3U+fP5Xoz61w/CNpev8ub+5vxPkTiNuWefdfUw9pTMdLkkdygAA5kvx+1sLp/fOaXq7A2IoND86zUMX4lB0uCR1KENmUJl7RfVCbyn2zyFn3jl9I7roAAAwHfncdv6Z22f5G4k/nAUAAGyNfO6QDjofUjr+FPnnocsA7EUOrl8jaTn/HDZGe0VLeP457CjB+ZA0RkqHbMrH9WueFOafQwpor2ir9bP0PgSjnfRBW2AXnD+HRf3rjzYyC+211lI+x5iwOC6sSiIVFX12Zqwtkqo0eEWcQtT2vuXq+jXCpvd72kgra5svt+0V/8TmeSsAAIDZyOc2xjubW3jn9BlFBwDAnpDPAQAAmI18DqnhRVcAAPaCfG4zF1Ylwa+Zz9v8OnzpLbIkb9evKZh/Lhtor2jMP6eXvM2vwzeAIUvydv2agvnnsoH2irZaP+RzAAAAZmM+4c28c5x0Hhpmui3+yYPXfcv0+WMA6l9/tJFZaK+1mE94I/8U+TOpWsrxfKR/vnOcBIch5hbzCR9Qjq9fTTGfsNGYTzgM8wkDAADkBfncBnhKmJw/6TwHACAp5HMAAABmI587pDzPr8PcJTBdnq9fnTH/XDbQXtGYf24X/0x8PGbO59fhm3BhtJxfv9pi/rlsoL2iMf8ctMI3gAEAkADyOQAAALORz8XFy637wYuuW1L1dmFZ7s+hSwQAOBjLmY9h4n6QvrABZLQF1vKdPBeW9Y5rOV1cv7qJPySXNtJQRPPlvL1intiLfA4RvDdLeC+tRKplu+pNv1HWfqbsUp7VjW90c+L8BIA8I59DlMAMRqUOB88hVNnST+l2+SMyurRbV+nB2wIAcFjB4+c2nb+HeAbi3pFY7s87x1n9kXkCcfDyv3McbwqVwn59e/QJrC5vvUVv/5evXxMZCXfwdiFOnDhx4inH6Z/Lta2fnOrQIaTKcJCSbLHTjVbZdPs6NAcA4IB4v3W9DI/EVEmAr/dorT1lD9vVc3SHmaE2OiiSOQAA+Rw2s7/sYevMLP2UbtM9blFpahfZS1UBAPtAPpd3hnYF+Uqif0q33S5i7oVZ6AAg5/5x6AIYQJMMJg/MquqYo/d2TILj7MX7WzelM6syAQC74H0IiMTLOfTpnJOQwuj5bkQipQqbnCVi44lPEwgA0Bb9c4hFq2QuzEFed43eqUqqdi/VFnP+0WkHAPnB/HNr4oEDkjQs547x6HFaYWnE/sqjCrPpdiTkQPZdn2reuIgi+V5uSGq+vTCB7fvOcdz57Xwj7fQ5D4kTJ06c+HZxnreuYUS/1I7cZ3lhB3uQb9ba+iHmoZpsdb+BEdm5k8y7kV0Olk47AMgMnrfmWpz04iDp0S5PTg81yXAcbhImO2RRiWzEuy4j7QDAdPTP5VecVwq0TYzSeQthU96dximh7JY/7eMY6bQDABPRP5dHMTMJbZO5ODR8N2J1Ydktf9rH0dFpBwAmIp/Ll7WZnM4PK43gvrKwUVYnCQ2tSxCvxwKAQXjeGiVjmU3Mwzng99yHFSZOMP7qKdh6v7pldT502gGAnuify4VNe4w0SeYScaj3OXZZUdusjk47ANAT88+Fxi8s65evX/Upz3ZxNdOYmn4s/nZ8d+gDln+Lr0n1TrGmDlzDdomO+6asO3h5AuOqkG45I749Vs/yEydOnHiW4jxvzbIsdbN5hc3rpmTskLXtqwuU4YYAAJ3xvDWbzEoCtuNLHbKavGr+BNaHB7IAcBDkc1ljyo1/R1nN3sKYldUpTH0CAKnheWswE9MFs272m4rTIia22haMbmg67QBgH+ify4jMpzIZfqK6KRP76lx02gHAPpDPGc/Q+zp2ZHRWJ4y0A4BE8bzVYObey/cnn314mTkT6LQDgO0w/5ypce+scjqUh/gB40bMVxcnrg7kl69fvdPaaVhO4sSJE9ctTv+ceTLTGbMP+eyf88re6UGnHQCsxfi5ANrmBNm7VW9B29bRhHdcnWTibGGkHQCsRf9cAD0zBj1LdRDRVUFFeWX1bwA67QDAi/45A2T1lowUmP4abBg67QDAi/45rWXvNpwC+ufCZP50otMOQG7RP6cv8hIkK6t9da7ATjvJ6MECgBf9czrK8B03HaTCa+XqHOOBLIDMY/45f/yw812pCbfU/Ftp7tfQuLexdCiPQXHvlHU6lGevcXWw3jntfGeOJuUkTpw48a3j9M/5HaprJ1f9JUkJayz65zaSz3OPTjsAWUI+t+SAyRw3le0EVh31uYV8ZnXCSDsAmUA+d2C5vYnuGynddnJ+QtJpB8BQvN96MDm/cUJPmX8HNpp7yHTaATAL+dxh0HsEneU8qxPmKwZgGvK5hXRyrDzfI/eH/HgfyOoUOu0A6I98Lj3cF9OkJqegtndHVuei0w6AtoLfh7i7u3v27Jn6d+BETdCcusd429ErLE5bm8ubVdDuWnGbhnbZxWrevGl9Eiee7fj691svLOud049eBlq5sCrb9RnQ1obausXnq9PuybiwKuofbn3u0jS0i2vHMxzIA563AkAyvGncYUsCIG/I5wAgYd7EjrcoAKSAfA4A9oi3KACkgHwOAFLC1CcA9uT/DrbnXseyKlZjeLACIGW0uNEO2HxZPHPeOY77c2FZ6mdfO8tiBQLw2TyfUx8N7k/5ZhJ3zWHDqlhWp7flwioy/9nss2mjXYevOLkpe8tgvenEPnhTLTd3uTPd255oca3sUvkhNvjoiNF8GWqa1cQubm63nKj1GhXLqjQiai1DlQbAJzifu7u7W7Ne6Wzs9B27JoOrYhp/9g0b1nlXjtvjvuP0HafvXJ/sf6ch1LGPz0oyahW3yBjSE9aO69tX6XWsmi31y1mdO/375lGS5YtCi29v13bfa+Un+9FhVNOsbRdfp92+ymFUpUXY9DwnTjzjcWed9yLu7dxRH8Ti/USY/XvcPna3WWp/cry/tWsitXrdu9uarbajcgX179nKZ2Onby8v3G4fLzbr+QnY6ax4x6Xwrdnhe1QbmW22dNb2reg5Xse5rLtbC9qgs7zfpS2vFrh+6S5ft/1VF1jgwD2qn/cxmjVOW49Dqj1g10sFPi6V5gfiPWFocf1afIN2d4utiuo7qKBj90cCPzqCtuZvvqAmdnLQNL52CfjxXlMRZfa1nfaVtvqzSzUCObHT+LnJl28DkdLLk0KvU2yN3Et60Hrt6fP/9qpmi8iLa+/HR7O62MpNuWYvPhoGV6860+rywo9HIxF58ni5cyhqp08/qw+XwdWHnvi2Vg3eo9rI753J8ENrJKWz8f1pM6zMIjKZPohI/edqyCFMOm9q3cXd7r55FFngQLOqm/WTzT7yPrWfBO9xs8aLofD4kYgMWq+XHrZG7VoV+NHbtzUR6d4ORaR3a4tI/e1pwd0uLR7qwC2ujAMr31U4vZ/dZT+1S6oCZfXYA2rDY/HREbQ1f/PNVlpq4iW5aZoNzcsciEoDsmXbfG5wVbQq6tq+bx7N7tkvTkSk+mJxLxcRGTx6u3pr9FCf7LOkoWaLyGAU68KO2umTo0L4imF7rF5/apdGreJ5V2r2/WnoFgZXRatiFa8G9Uv1HCriEFRQZUJRBQ7e0azqZCklOmpen8q2lbaZanP+R/z8WBrDqPZy27r6c11Eut97Mv3xICK1F57mp8VDHbzF45l03lhWxbJetwZLce+xh0V8Hx0RW/MLbGKaJkLYZy+VBmTRtvmc2z2+dmBN6adinO15H+6sbLN4fCwiDz+SvOCD9jgdRd9RZmvOHxJ1z71/nvo2WGh+dB8oqExo8yKuqbroSkvIybXavjrkh+k4YteLAp/82j4WsW87wz8GUmr/azWbp8WDdqRDi6+p/EnnTbE18j0YXT320NpY/ugI3NoGctY0mwkrM5UGZFEy85V4/1bz/g0Xx/yh3v8ieu4LzX/XZfYsZvedhu2x1zjvSs12Luti16Lf2y2c3ts1EenW3nQm4YdQbS4yoegCP0wjdjdb8TdVpGmncSMxKi1h478HIvLkqBpv14XnT0si3dbVQI5fPl961kaLi2jd4oGV71JPY0VEZp2vc8vHHhyJv7UNipujplkpjdsRLiLD2674+sJD5bnSgKxaO8LufcT7EJ6fqPchApZZfh8iaEz00sKL0btz9csNBueubs2/x8t2aWVh/3sevtHxbnfCcXsccAjesrmrBBTY+dRevt0tjSb2Vbt3ayHD0ncZO/x+ua19/SWLXazuerXA7uru67G0uH4tHnyNB1b+op7dX6kXX47b4/7qsQfURvBHR8DWIj4rAkbcZ7dpgtpl9cfbUvNXkn1lDn4fQt9KW/3ZpRqBnLCcdVOTX1jWu/l3EcIIF1bl3VYzztPWhtq6xeer0+77skvT0C6uHc9wIA+2nX8OJth5HjIYiXbXE+2SLI3m/SJOXIM4/XMZRP9c3tA/py365xJB/xyw1uG+vxUAAABJIJ8DAAAwG/kcAACA2cjnAAAAzPaPOAtdWJV9lwOaoK3ziXbXE+0CIKZY+RzvWJlll3sAbW2i3e/6tPue7Ng0tItCXgusxfxzWcZ8V/lEu+uJdkmWPvN+ESeuQ5z55zKI+efyhvnntMX8c4lg/jlgLd6HAAAAMBv5HAAAgNnI5wAAAMxGPgcAAGA28jkAAACzMZ8wltDW+US764l2ARBTcD53d3f37Nkz9395Z94s7j3A146usLjQ1mby3fVpd314m4Z22VpgXrtpfRInnu04889lEPPP5Q3zz2mL+ecSwfxzwFqMnwMAADAb+RwAAIDZyOcAAADMRj4HAABgNvI5AAAAs5HPAQAAmC04n7u7u0u5HNiHsHakfbONdtcT7ZKsTeuTOPFsx2PNPxe9ADS09fxziZcE6dhx/rkESwKfXeafS7YkRmP+OSDa+nwOAAAAOmP8HAAAgNnI5wAAAMxGPgcAAGA28jkAAACzkc8BAACYbbP554gTJ06cOHHixInrFme+EgAAALPxvBUAAMBs5HMAAABmI58DAAAwG/kcAACA2cjnAAAAzEY+BwAAYDbmnyNOnDhx4sSJEzc7zvxzAAAAZuN5KwAAgNnI5wAAAMxGPgcAAGA28jkAAACzkc8BAACYjXwOAADAbMw/R5w4ceLEiRMnbnac+ecAAADMxvNWAAAAs5HPAQAAmI18DgAAwGzkcwAAAGYjnwMAADAb+RwAAIDZmH+OOHHixIkTJ07c7DjzzwEAAJiN560AAABmI58DAAAwG/kcAACA2cjnAAAAzEY+BwAAYDbyOQAAALMx/xxx4sSJEydOnLjZceafAwAAMBvPWwEAAMxGPgcAAGA28jkAAACzkc8BAACYjXwOAADAbORzAAAAZmP+OeLEiRMnTpw4cbPjzD8HAABgNp63AgAAmI18DgAAwGzkcwAAAGYjnwMAADAb+RwAAIDZyOcAAADM9v8BCK5qXoNC5b0AAAAASUVORK5CYII=" alt="" name="" />

一、文件系统资源 FileSystemResource

　　文件系统资源 FileSystemResource，资源以文件系统路径的方式表示，唯一一个实现了WritableResource接口的类。这个类由2个不可变的属性 file 和 path ，本质上就是一个java.io.File 的包装。这个类的 equals() 和 hashcode() 都通过属性 path 来操作。

public class FileSystemResource extends AbstractResource implements WritableResource {

    private final File file;   //  不可变属性

    private final String path; //  不可变属性

    public FileSystemResource(File file) { //  简单的构造方法，path为file路径格式化后的样子
        Assert.notNull(file, "File must not be null");
        this.file = file;
        this.path = StringUtils.cleanPath(file.getPath());
    }

    public FileSystemResource(String path) {   //简单的构造方法
        Assert.notNull(path, "Path must not be null");
        this.file = new File(path);
        this.path = StringUtils.cleanPath(path);
    }

    public final String getPath() {    //新增的方法，返回资源路径，方法不可重写
        return this.path;
    }

    @Override
    public boolean exists() {
        return this.file.exists();
    }

    @Override
    public boolean isReadable() {
        return (this.file.canRead() && !this.file.isDirectory());
    }

    public InputStream getInputStream() throws IOException {   //InputStreamSource接口的实现方法
        return new FileInputStream(this.file);
    }

    @Override
    public URL getURL() throws IOException {   //可见这个url是通过uri得到的
        return this.file.toURI().toURL();
    }

    @Override
    public URI getURI() throws IOException {
        return this.file.toURI();
    }

    @Override
    public File getFile() {
        return this.file;
    }

    @Override
    public long contentLength() throws IOException {
        return this.file.length();
    }

    @Override
    public Resource createRelative(String relativePath) {
        String pathToUse = StringUtils.applyRelativePath(this.path, relativePath);
        return new FileSystemResource(pathToUse);
    }

    @Override
    public String getFilename() {
        return this.file.getName();
    }

    public String getDescription() {   //  资源描述，直接用绝对路径来构造
        return "file [" + this.file.getAbsolutePath() + "]";
    }

    public boolean isWritable() {  //  WritableResource接口的实现方法
        return (this.file.canWrite() && !this.file.isDirectory());
    }

    public OutputStream getOutputStream() throws IOException {
        return new FileOutputStream(this.file);
    }

    @Override
    public boolean equals(Object obj) {    //通过path来比较
        return (obj == this ||
            (obj instanceof FileSystemResource && this.path.equals(((FileSystemResource) obj).path)));
    }

    @Override
    public int hashCode() {    //  文件资源的HashCode就是path的hashCode
        return this.path.hashCode();
    }

}

二、常用的ClassPathResource

ClassPathResource这个资源类表示的是类路径下的资源，资源以相对于类路径的方式表示，是基于class的 getResourceAsStream(this.path) 或者 this.classLoader.getResourceAsStream(this.path) 。

public class ClassPathResource extends AbstractFileResolvingResource {

    private final String path;

    private ClassLoader classLoader;

    private Class<?> clazz;

    /**
     * Create a new ClassPathResource for ClassLoader usage.
     * A leading slash will be removed, as the ClassLoader
     * resource access methods will not accept it.
     * <p>The thread context class loader will be used for
     * loading the resource.
     * @param path the absolute path within the class path
     * @see java.lang.ClassLoader#getResourceAsStream(String)
     * @see org.springframework.util.ClassUtils#getDefaultClassLoader()
     */
    public ClassPathResource(String path) {
        this(path, (ClassLoader) null);
    }

    /**
     * Create a new ClassPathResource for ClassLoader usage.
     * A leading slash will be removed, as the ClassLoader
     * resource access methods will not accept it.
     * @param path the absolute path within the classpath
     * @param classLoader the class loader to load the resource with,
     * or {@code null} for the thread context class loader
     * @see ClassLoader#getResourceAsStream(String)
     */
    public ClassPathResource(String path, ClassLoader classLoader) {
        Assert.notNull(path, "Path must not be null");
        String pathToUse = StringUtils.cleanPath(path);
        if (pathToUse.startsWith("/")) {
            pathToUse = pathToUse.substring(1);
        }
        this.path = pathToUse;
        this.classLoader = (classLoader != null ? classLoader : ClassUtils.getDefaultClassLoader());
    }

    /**
     * Create a new ClassPathResource for Class usage.
     * The path can be relative to the given class,
     * or absolute within the classpath via a leading slash.
     * @param path relative or absolute path within the class path
     * @param clazz the class to load resources with
     * @see java.lang.Class#getResourceAsStream
     */
    public ClassPathResource(String path, Class<?> clazz) {
        Assert.notNull(path, "Path must not be null");
        this.path = StringUtils.cleanPath(path);
        this.clazz = clazz;
    }

    /**
     * Create a new ClassPathResource with optional ClassLoader and Class.
     * Only for internal usage.
     * @param path relative or absolute path within the classpath
     * @param classLoader the class loader to load the resource with, if any
     * @param clazz the class to load resources with, if any
     */
    protected ClassPathResource(String path, ClassLoader classLoader, Class<?> clazz) {
        this.path = StringUtils.cleanPath(path);
        this.classLoader = classLoader;
        this.clazz = clazz;
    }

    /**
     * Return the path for this resource (as resource path within the class path).
     */
    public final String getPath() {
        return this.path;
    }

    /**
     * Return the ClassLoader that this resource will be obtained from.
     */
    public final ClassLoader getClassLoader() {
        return (this.classLoader != null ? this.classLoader : this.clazz.getClassLoader());
    }

    /**
     * This implementation checks for the resolution of a resource URL.
     * @see java.lang.ClassLoader#getResource(String)
     * @see java.lang.Class#getResource(String)
     */
    @Override
    public boolean exists() {
        URL url;
        if (this.clazz != null) {
            url = this.clazz.getResource(this.path);
        }
        else {
            url = this.classLoader.getResource(this.path);
        }
        return (url != null);
    }

    /**
     * This implementation opens an InputStream for the given class path resource.
     * @see java.lang.ClassLoader#getResourceAsStream(String)
     * @see java.lang.Class#getResourceAsStream(String)
     */
    public InputStream getInputStream() throws IOException {
        InputStream is;
        if (this.clazz != null) {
            is = this.clazz.getResourceAsStream(this.path);
        }
        else {
            is = this.classLoader.getResourceAsStream(this.path);
        }
        if (is == null) {
            throw new FileNotFoundException(getDescription() + " cannot be opened because it does not exist");
        }
        return is;
    }

    /**
     * This implementation returns a URL for the underlying class path resource.
     * @see java.lang.ClassLoader#getResource(String)
     * @see java.lang.Class#getResource(String)
     */
    @Override
    public URL getURL() throws IOException {
        URL url;
        if (this.clazz != null) {
            url = this.clazz.getResource(this.path);
        }
        else {
            url = this.classLoader.getResource(this.path);
        }
        if (url == null) {
            throw new FileNotFoundException(getDescription() + " cannot be resolved to URL because it does not exist");
        }
        return url;
    }

    /**
     * This implementation creates a ClassPathResource, applying the given path
     * relative to the path of the underlying resource of this descriptor.
     * @see org.springframework.util.StringUtils#applyRelativePath(String, String)
     */
    @Override
    public Resource createRelative(String relativePath) {
        String pathToUse = StringUtils.applyRelativePath(this.path, relativePath);
        return new ClassPathResource(pathToUse, this.classLoader, this.clazz);
    }

    /**
     * This implementation returns the name of the file that this class path
     * resource refers to.
     * @see org.springframework.util.StringUtils#getFilename(String)
     */
    @Override
    public String getFilename() {
        return StringUtils.getFilename(this.path);
    }

    /**
     * This implementation returns a description that includes the class path location.
     */
    public String getDescription() {
        StringBuilder builder = new StringBuilder("class path resource [");
        String pathToUse = path;
        if (this.clazz != null && !pathToUse.startsWith("/")) {
            builder.append(ClassUtils.classPackageAsResourcePath(this.clazz));
            builder.append('/');
        }
        if (pathToUse.startsWith("/")) {
            pathToUse = pathToUse.substring(1);
        }
        builder.append(pathToUse);
        builder.append(']');
        return builder.toString();
    }

    /**
     * This implementation compares the underlying class path locations.
     */
    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj instanceof ClassPathResource) {
            ClassPathResource otherRes = (ClassPathResource) obj;
            return (this.path.equals(otherRes.path) &&
                    ObjectUtils.nullSafeEquals(this.classLoader, otherRes.classLoader) &&
                    ObjectUtils.nullSafeEquals(this.clazz, otherRes.clazz));
        }
        return false;
    }

    /**
     * This implementation returns the hash code of the underlying
     * class path location.
     */
    @Override
    public int hashCode() {
        return this.path.hashCode();
    }

}

三、Url资源——UrlResource

UrlResource这个资源类封装了可以以URL表示的各种资源。这个资源类有3个属性，一个URI、一个URL，以及一个规范化后的URL，用于资源间的比较以及计算HashCode。

public class UrlResource extends AbstractFileResolvingResource {

    /**
     * Original URI, if available; used for URI and File access.
     */
    private final URI uri;

    /**
     * Original URL, used for actual access.
     */
    private final URL url;

    /**
     * Cleaned URL (with normalized path), used for comparisons.
     */
    private final URL cleanedUrl;

    /**
     * Create a new UrlResource based on the given URI object.
     * @param uri a URI
     * @throws MalformedURLException if the given URL path is not valid
     */
    public UrlResource(URI uri) throws MalformedURLException {
        Assert.notNull(uri, "URI must not be null");
        this.uri = uri;
        this.url = uri.toURL();
        this.cleanedUrl = getCleanedUrl(this.url, uri.toString());
    }

    /**
     * Create a new UrlResource based on the given URL object.
     * @param url a URL
     */
    public UrlResource(URL url) {
        Assert.notNull(url, "URL must not be null");
        this.url = url;
        this.cleanedUrl = getCleanedUrl(this.url, url.toString());
        this.uri = null;
    }

    /**
     * Create a new UrlResource based on a URL path.
     * <p>Note: The given path needs to be pre-encoded if necessary.
     * @param path a URL path
     * @throws MalformedURLException if the given URL path is not valid
     * @see java.net.URL#URL(String)
     */
    public UrlResource(String path) throws MalformedURLException {
        Assert.notNull(path, "Path must not be null");
        this.uri = null;
        this.url = new URL(path);
        this.cleanedUrl = getCleanedUrl(this.url, path);
    }

    /**
     * Create a new UrlResource based on a URI specification.
     * <p>The given parts will automatically get encoded if necessary.
     * @param protocol the URL protocol to use (e.g. "jar" or "file" - without colon);
     * also known as "scheme"
     * @param location the location (e.g. the file path within that protocol);
     * also known as "scheme-specific part"
     * @throws MalformedURLException if the given URL specification is not valid
     * @see java.net.URI#URI(String, String, String)
     */
    public UrlResource(String protocol, String location) throws MalformedURLException  {
        this(protocol, location, null);
    }

    /**
     * Create a new UrlResource based on a URI specification.
     * <p>The given parts will automatically get encoded if necessary.
     * @param protocol the URL protocol to use (e.g. "jar" or "file" - without colon);
     * also known as "scheme"
     * @param location the location (e.g. the file path within that protocol);
     * also known as "scheme-specific part"
     * @param fragment the fragment within that location (e.g. anchor on an HTML page,
     * as following after a "#" separator)
     * @throws MalformedURLException if the given URL specification is not valid
     * @see java.net.URI#URI(String, String, String)
     */
    public UrlResource(String protocol, String location, String fragment) throws MalformedURLException  {
        try {
            this.uri = new URI(protocol, location, fragment);
            this.url = this.uri.toURL();
            this.cleanedUrl = getCleanedUrl(this.url, this.uri.toString());
        }
        catch (URISyntaxException ex) {
            MalformedURLException exToThrow = new MalformedURLException(ex.getMessage());
            exToThrow.initCause(ex);
            throw exToThrow;
        }
    }

    /**
     * Determine a cleaned URL for the given original URL.
     * @param originalUrl the original URL
     * @param originalPath the original URL path
     * @return the cleaned URL
     * @see org.springframework.util.StringUtils#cleanPath
     */
    private URL getCleanedUrl(URL originalUrl, String originalPath) {
        try {
            return new URL(StringUtils.cleanPath(originalPath));
        }
        catch (MalformedURLException ex) {
            // Cleaned URL path cannot be converted to URL
            // -> take original URL.
            return originalUrl;
        }
    }

    /**
     * This implementation opens an InputStream for the given URL.
     * It sets the "UseCaches" flag to {@code false},
     * mainly to avoid jar file locking on Windows.
     * @see java.net.URL#openConnection()
     * @see java.net.URLConnection#setUseCaches(boolean)
     * @see java.net.URLConnection#getInputStream()
     */
    public InputStream getInputStream() throws IOException {
        URLConnection con = this.url.openConnection();
        ResourceUtils.useCachesIfNecessary(con);
        try {
            return con.getInputStream();
        }
        catch (IOException ex) {
            // Close the HTTP connection (if applicable).
            if (con instanceof HttpURLConnection) {
                ((HttpURLConnection) con).disconnect();
            }
            throw ex;
        }
    }

    /**
     * This implementation returns the underlying URL reference.
     */
    @Override
    public URL getURL() throws IOException {
        return this.url;
    }

    /**
     * This implementation returns the underlying URI directly,
     * if possible.
     */
    @Override
    public URI getURI() throws IOException {
        if (this.uri != null) {
            return this.uri;
        }
        else {
            return super.getURI();
        }
    }

    /**
     * This implementation returns a File reference for the underlying URL/URI,
     * provided that it refers to a file in the file system.
     * @see org.springframework.util.ResourceUtils#getFile(java.net.URL, String)
     */
    @Override
    public File getFile() throws IOException {
        if (this.uri != null) {
            return super.getFile(this.uri);
        }
        else {
            return super.getFile();
        }
    }

    /**
     * This implementation creates a UrlResource, applying the given path
     * relative to the path of the underlying URL of this resource descriptor.
     * @see java.net.URL#URL(java.net.URL, String)
     */
    @Override
    public Resource createRelative(String relativePath) throws MalformedURLException {
        if (relativePath.startsWith("/")) {
            relativePath = relativePath.substring(1);
        }
        return new UrlResource(new URL(this.url, relativePath));
    }

    /**
     * This implementation returns the name of the file that this URL refers to.
     * @see java.net.URL#getFile()
     * @see java.io.File#getName()
     */
    @Override
    public String getFilename() {
        return new File(this.url.getFile()).getName();
    }

    /**
     * This implementation returns a description that includes the URL.
     */
    public String getDescription() {
        return "URL [" + this.url + "]";
    }

    /**
     * This implementation compares the underlying URL references.
     */
    @Override
    public boolean equals(Object obj) {
        return (obj == this ||
            (obj instanceof UrlResource && this.cleanedUrl.equals(((UrlResource) obj).cleanedUrl)));
    }

    /**
     * This implementation returns the hash code of the underlying URL reference.
     */
    @Override
    public int hashCode() {
        return this.cleanedUrl.hashCode();
    }

}

四、Servlet上下文资源——ServletContextResource

实现基本就是基于 this.servletContext.getResource(this.path) 或 this.servletContext.getResourceAsStream(this.path) 这两个方法。

public class ServletContextResource extends AbstractFileResolvingResource implements ContextResource {

    private final ServletContext servletContext;

    private final String path;

    /**
     * Create a new ServletContextResource.
     * <p>The Servlet spec requires that resource paths start with a slash,
     * even if many containers accept paths without leading slash too.
     * Consequently, the given path will be prepended with a slash if it
     * doesn't already start with one.
     * @param servletContext the ServletContext to load from
     * @param path the path of the resource
     */
    public ServletContextResource(ServletContext servletContext, String path) {
        // check ServletContext
        Assert.notNull(servletContext, "Cannot resolve ServletContextResource without ServletContext");
        this.servletContext = servletContext;

        // check path
        Assert.notNull(path, "Path is required");
        String pathToUse = StringUtils.cleanPath(path);
        if (!pathToUse.startsWith("/")) {
            pathToUse = "/" + pathToUse;
        }
        this.path = pathToUse;
    }

    /**
     * Return the ServletContext for this resource.
     */
    public final ServletContext getServletContext() {
        return this.servletContext;
    }

    /**
     * Return the path for this resource.
     */
    public final String getPath() {
        return this.path;
    }

    /**
     * This implementation checks {@code ServletContext.getResource}.
     * @see javax.servlet.ServletContext#getResource(String)
     */
    @Override
    public boolean exists() {
        try {
            URL url = this.servletContext.getResource(this.path);
            return (url != null);
        }
        catch (MalformedURLException ex) {
            return false;
        }
    }

    /**
     * This implementation delegates to {@code ServletContext.getResourceAsStream},
     * which returns {@code null} in case of a non-readable resource (e.g. a directory).
     * @see javax.servlet.ServletContext#getResourceAsStream(String)
     */
    @Override
    public boolean isReadable() {
        InputStream is = this.servletContext.getResourceAsStream(this.path);
        if (is != null) {
            try {
                is.close();
            }
            catch (IOException ex) {
                // ignore
            }
            return true;
        }
        else {
            return false;
        }
    }

    /**
     * This implementation delegates to {@code ServletContext.getResourceAsStream},
     * but throws a FileNotFoundException if no resource found.
     * @see javax.servlet.ServletContext#getResourceAsStream(String)
     */
    public InputStream getInputStream() throws IOException {
        InputStream is = this.servletContext.getResourceAsStream(this.path);
        if (is == null) {
            throw new FileNotFoundException("Could not open " + getDescription());
        }
        return is;
    }

    /**
     * This implementation delegates to {@code ServletContext.getResource},
     * but throws a FileNotFoundException if no resource found.
     * @see javax.servlet.ServletContext#getResource(String)
     */
    @Override
    public URL getURL() throws IOException {
        URL url = this.servletContext.getResource(this.path);
        if (url == null) {
            throw new FileNotFoundException(
                    getDescription() + " cannot be resolved to URL because it does not exist");
        }
        return url;
    }

    /**
     * This implementation resolves "file:" URLs or alternatively delegates to
     * {@code ServletContext.getRealPath}, throwing a FileNotFoundException
     * if not found or not resolvable.
     * @see javax.servlet.ServletContext#getResource(String)
     * @see javax.servlet.ServletContext#getRealPath(String)
     */
    @Override
    public File getFile() throws IOException {
        URL url = this.servletContext.getResource(this.path);
        if (url != null && ResourceUtils.isFileURL(url)) {
            // Proceed with file system resolution...
            return super.getFile();
        }
        else {
            String realPath = WebUtils.getRealPath(this.servletContext, this.path);
            return new File(realPath);
        }
    }

    /**
     * This implementation creates a ServletContextResource, applying the given path
     * relative to the path of the underlying file of this resource descriptor.
     * @see org.springframework.util.StringUtils#applyRelativePath(String, String)
     */
    @Override
    public Resource createRelative(String relativePath) {
        String pathToUse = StringUtils.applyRelativePath(this.path, relativePath);
        return new ServletContextResource(this.servletContext, pathToUse);
    }

    /**
     * This implementation returns the name of the file that this ServletContext
     * resource refers to.
     * @see org.springframework.util.StringUtils#getFilename(String)
     */
    @Override
    public String getFilename() {
        return StringUtils.getFilename(this.path);
    }

    /**
     * This implementation returns a description that includes the ServletContext
     * resource location.
     */
    public String getDescription() {
        return "ServletContext resource [" + this.path + "]";
    }

    public String getPathWithinContext() {
        return this.path;
    }

    /**
     * This implementation compares the underlying ServletContext resource locations.
     */
    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj instanceof ServletContextResource) {
            ServletContextResource otherRes = (ServletContextResource) obj;
            return (this.servletContext.equals(otherRes.servletContext) && this.path.equals(otherRes.path));
        }
        return false;
    }

    /**
     * This implementation returns the hash code of the underlying
     * ServletContext resource location.
     */
    @Override
    public int hashCode() {
        return this.path.hashCode();
    }

}

五、其它不常用的实现类

1、字节数组资源——ByteArrayResource

    若需要操作描述一个字节数组，可以用这个资源类。ByteArrayResource可多次读取数组资源。

2、描述性资源——DescriptiveResource

　若一个资源，仅仅有一个描述，非常抽象的这种情况，可以用这个资源类，它并没有指向一个实际的可读的资源。

3、输入流资源——InputStreamResource

　输入流资源InputStreamResource，是一个不可变InputStream的包装和一个不可变的描述字符串。此外还有一个私有成员变量Boolean read用于限制本资源的InputStream不可被重复获取。这个包装类指向的是一个已经打开的资源，所以它的 isOpen()总是返回true。而且它不能重复获取资源，只能读取一次

4、VFS资源——VfsResource

    vfs是Virtual File System虚拟文件系统，也称为虚拟文件系统开关（Virtual Filesystem Switch）.是Linux档案系统对外的接口。任何要使用档案系统的程序都必须经由这层接口来使用它。（摘自百度百科...）它能一致的访问物理文件系统、jar资源、zip资源、war资源等，VFS能把这些资源一致的映射到一个目录上，访问它们就像访问物理文件资源一样，而其实这些资源不存在于物理文件系统。

5、Portlet上下文资源——PortletContextResource

    Portlet是基于java的web组件，由portlet容器管理，并由容器处理请求，生产动态内容。这个资源类封装了一个不可变的javax.portlet.PortletContext对象和一个不可变的String对象代表路径。类中所有操作都基于这两个属性。PortletContextResource对象实现了ContextResource接口，实现了方法String getPathWithinContext()，即返回自身的path属性。

 

http://www.cnblogs.com/zrtqsk/p/4015985.html