一、SpringMVC基础入门,创建一个HelloWorld程序

  1.首先,导入SpringMVC需要的jar包。

  2.添加Web.xml配置文件中关于SpringMVC的配置

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
<!--configure the setting of springmvcDispatcherServlet and configure the mapping-->
<servlet>
    <servlet-name><span id="45_nwp" style="width: auto; height: auto; float: none;"><a id="45_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="45" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>mvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc-servlet.xml</param-value>
      </init-param>
      <!-- <load-on-startup>1</load-on-startup> -->
</<span id="46_nwp" style="width: auto; height: auto; float: none;"><a id="46_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=servlet&k0=servlet&kdi0=0&luki=5&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="46" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">servlet</span></a></span>>
 
<servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

  3.在src下添加springmvc-servlet.xml配置文件

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
<?<span id="34_nwp" style="width: auto; height: auto; float: none;"><a id="34_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=xml&k0=xml&kdi0=0&luki=3&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="34" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">xml</span></a></span> version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.<span id="35_nwp" style="width: auto; height: auto; float: none;"><a id="35_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="35" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.org/schema/beans"
    xmlns:<span id="36_nwp" style="width: auto; height: auto; float: none;"><a id="36_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=xsi&k0=xsi&kdi0=0&luki=6&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="36" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">xsi</span></a></span>="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:<span id="37_nwp" style="width: auto; height: auto; float: none;"><a id="37_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=mvc&k0=mvc&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="37" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">mvc</span></a></span>="http://www.springframework.org/schema/mvc"
        http://www.springframework.org/schema/context http://www.<span id="38_nwp" style="width: auto; height: auto; float: none;"><a id="38_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="38" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.org/schema/context/spring-context-4.1.xsd
 
    <!-- scan the package and the sub package -->
    <context:component-scan base-package="test.SpringMVC"/>
 
    <!-- don't handle the static resource -->
    <<span id="39_nwp" style="width: auto; height: auto; float: none;"><a id="39_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=mvc&k0=mvc&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="39" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">mvc</span></a></span>:default-<span id="40_nwp" style="width: auto; height: auto; float: none;"><a id="40_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=servlet&k0=servlet&kdi0=0&luki=5&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="40" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">servlet</span></a></span>-handler />
 
    <!-- if you use annotation you must configure following setting -->
    <mvc:annotation-driven />
     
    <!-- configure the InternalResourceViewResolver -->
    <bean class="org.<span id="41_nwp" style="width: auto; height: auto; float: none;"><a id="41_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="41" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.web.servlet.view.InternalResourceViewResolver"
            id="internalResourceViewResolver">
        <!-- 前缀 -->
        <property name="prefix" value="/WEB-INF/<span id="42_nwp" style="width: auto; height: auto; float: none;"><a id="42_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=jsp&k0=jsp&kdi0=0&luki=9&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="42" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">jsp</span></a></span>/" />
        <!-- 后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

  4.在WEB-INF文件夹下创建名为jsp的文件夹,用来存放jsp视图。创建一个hello.jsp,在body中添加“Hello World”。

  5.建立包及Controller,如下所示

  6.编写Controller代码

1
2
3
4
5
6
7
8
9
@Controller
@RequestMapping("/mvc")
public class mvcController {
 
    @RequestMapping("/hello")
    public String hello(){       
        return "hello";
    }
}

  7.启动服务器,键入 http://localhost:8080/项目名/mvc/hello

 二、配置解析

  1.Dispatcherservlet

  DispatcherServlet是前置控制器,配置在web.xml文件中的。拦截匹配的请求,Servlet拦截匹配规则要自已定义,把拦截下来的请求,依据相应的规则分发到目标Controller来处理,是配置spring MVC的第一步。

  2.InternalResourceViewResolver

  视图名称解析器

  3.以上出现的注解

  @Controller 负责注册一个bean 到spring 上下文中

  @RequestMapping 注解为控制器指定可以处理哪些 URL 请求

 三、SpringMVC常用注解

  @Controller

  负责注册一个bean 到spring 上下文中

  @RequestMapping

  注解为控制器指定可以处理哪些 URL 请求

  @RequestBody

  该注解用于读取Request请求的body部分数据,使用系统默认配置的HttpMessageConverter进行解析,然后把相应的数据绑定到要返回的对象上 ,再把HttpMessageConverter返回的对象数据绑定到 controller中方法的参数上

  @ResponseBody

  该注解用于将Controller的方法返回的对象,通过适当的HttpMessageConverter转换为指定格式后,写入到Response对象的body数据区

  @ModelAttribute    

  在方法定义上使用 @ModelAttribute 注解:Spring MVC 在调用目标处理方法前,会先逐个调用在方法级上标注了@ModelAttribute 的方法

  在方法的入参前使用 @ModelAttribute 注解:可以从隐含对象中获取隐含的模型数据中获取对象,再将请求参数 –绑定到对象中,再传入入参将方法入参对象添加到模型中

  @RequestParam 

  在处理方法入参处使用 @RequestParam 可以把请求参 数传递给请求方法

  @PathVariable

  绑定 URL 占位符到入参

  @ExceptionHandler

  注解到方法上,出现异常时会执行该方法

  @ControllerAdvice

  使一个Contoller成为全局的异常处理类,类中用@ExceptionHandler方法注解的方法可以处理所有Controller发生的异常

 四、自动匹配参数

1
2
3
4
5
6
//match automatically
@RequestMapping("/person")
public String toPerson(String name,double age){
    System.out.println(name+" "+age);
    return "hello";
}

 五、自动装箱

  1.编写一个Person实体类

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
package test.SpringMVC.model;
 
public class Person {
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    private String name;
    private int age;
     
}

  2.在Controller里编写方法

1
2
3
4
5
6
//boxing automatically
@RequestMapping("/person1")
public String toPerson(Person p){
    System.out.println(p.getName()+" "+p.getAge());
    return "hello";
}

 六、使用InitBinder来处理Date类型的参数

1
2
3
4
5
6
7
8
9
10
11
12
13
//the parameter was converted in initBinder
@RequestMapping("/date")
public String date(Date date){
    System.out.println(date);
    return "hello";
}
    
//At the time of initialization,convert the type "String" to type "date"
@InitBinder
public void initBinder(ServletRequestDataBinder binder){
    binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),
            true));
}

 七、向前台传递参数

1
2
3
4
5
6
7
8
9
//pass the parameters to front-end
@RequestMapping("/show")
public String showPerson(Map<String,Object> map){
    Person p =new Person();
    map.put("p", p);
    p.setAge(20);
    p.setName("jayjay");
    return "show";
}

  前台可在Request域中取到"p"

 八、使用Ajax调用

1
2
3
4
5
6
7
8
9
//pass the parameters to front-end using <span id="28_nwp" style="width: auto; height: auto; float: none;"><a id="28_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=ajax&k0=ajax&kdi0=0&luki=4&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="28" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">ajax</span></a></span>
@RequestMapping("/getPerson")
public void getPerson(String name,PrintWriter pw){
    pw.write("hello,"+name);       
}
@RequestMapping("/name")
public String sayHello(){
    return "name";
}

  前台用下面的Jquery代码调用

1
2
3
4
5
6
7
$(function(){
    $("#btn").click(function(){
       $.post("<span id="25_nwp" style="width: auto; height: auto; float: none;"><a id="25_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=mvc&k0=mvc&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="25" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">mvc</span></a></span>/getPerson",{name:$("#name").val()},function(<span id="26_nwp" style="width: auto; height: auto; float: none;"><a id="26_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=data&k0=data&kdi0=0&luki=1&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="26" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">data</span></a></span>){
            alert(data);
        });
    });
});

 九、在Controller中使用redirect方式处理请求

1
2
3
4
5
//redirect
@RequestMapping("/redirect")
public String redirect(){
    return "redirect:hello";
}

 十、文件上传

  1.需要导入两个jar包

  2.在SpringMVC配置文件中加入

1
2
3
4
<!-- upload settings -->
<bean id="multipartResolver"  class="org.<span id="24_nwp" style="width: auto; height: auto; float: none;"><a id="24_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="24" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="102400000"></property>
</bean>

  3.方法代码

1
2
3
4
5
6
7
8
9
10
11
12
13
14
@RequestMapping(value="/upload",method=RequestMethod.POST)
public String upload(HttpServletRequest req) throws Exception{
    MultipartHttpServletRequest mreq = (MultipartHttpServletRequest)req;
    MultipartFile file = mreq.getFile("file");
    String fileName = file.getOriginalFilename();
    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");       
    FileOutputStream fos = new FileOutputStream(req.getSession().getServletContext().getRealPath("/")+
            "upload/"+sdf.format(new Date())+fileName.substring(fileName.lastIndexOf('.')));
    fos.write(file.getBytes());
    fos.flush();
    fos.close();
     
    return "hello";
}

  4.前台form表单

1
2
3
4
<form action="mvc/upload" method="post" enctype="multipart/form-<span id="22_nwp" style="width: auto; height: auto; float: none;"><a id="22_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=data&k0=data&kdi0=0&luki=1&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="22" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">data</span></a></span>">
    <input type="file" name="file"><br>
    <input type="submit" value="submit">
</form>

 十一、使用@RequestParam注解指定参数的name

1
2
3
4
5
6
7
8
9
10
@Controller
@RequestMapping("/test")
public class <span id="21_nwp" style="width: auto; height: auto; float: none;"><a id="21_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=mvc&k0=mvc&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="21" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">mvc</span></a></span>Controller1 {
    @RequestMapping(value="/param")
    public String testRequestParam(@RequestParam(value="id") Integer id,
            @RequestParam(value="name")String name){
        System.out.println(id+" "+name);
        return "/hello";
    }   
}

 十二、RESTFul风格的SringMVC

  1.RestController

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
@Controller
@RequestMapping("/rest")
public class RestController {
    @RequestMapping(value="/user/{id}",method=RequestMethod.GET)
    public String get(@PathVariable("id") Integer id){
        System.out.println("get"+id);
        return "/hello";
    }
     
    @RequestMapping(value="/user/{id}",method=RequestMethod.POST)
    public String post(@PathVariable("id") Integer id){
        System.out.println("post"+id);
        return "/hello";
    }
     
    @RequestMapping(value="/user/{id}",method=RequestMethod.PUT)
    public String put(@PathVariable("id") Integer id){
        System.out.println("put"+id);
        return "/hello";
    }
     
    @RequestMapping(value="/user/{id}",method=RequestMethod.DELETE)
    public String delete(@PathVariable("id") Integer id){
        System.out.println("delete"+id);
        return "/hello";
    }
     
}

  2.form表单发送put和delete请求

  在web.xml中配置

1
2
3
4
5
6
7
8
9
<!-- configure the HiddenHttpMethodFilter,convert the post method to put or delete -->
<filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.<span id="19_nwp" style="width: auto; height: auto; float: none;"><a id="19_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="19" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

  在前台可以用以下代码产生请求

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
<form action="rest/user/1" method="post">
    <input type="hidden" name="_method" value="PUT">
    <input type="submit" value="put">
</form>
 
<form action="rest/user/1" method="post">
    <input type="submit" value="post">
</form>
 
<form action="rest/user/1" method="get">
    <input type="submit" value="get">
</form>
 
<form action="rest/user/1" method="post">
    <input type="hidden" name="_method" value="DELETE">
    <input type="submit" value="delete">
</form>

 十三、返回json格式的字符串

  1.导入以下jar包

  2.方法代码

1
2
3
4
5
6
7
8
9
10
11
12
13
14
@Controller
@RequestMapping("/json")
public class jsonController {
     
    @ResponseBody
    @RequestMapping("/user")
    public  User get(){
        User u = new User();
        u.setId(1);
        u.setName("jayjay");
        u.setBirth(new Date());
        return u;
    }
}

 十四、异常的处理

  1.处理局部异常(Controller内)

1
2
3
4
5
6
7
8
9
10
11
12
13
@ExceptionHandler
public ModelAndView exceptionHandler(Exception ex){
    ModelAndView mv = new ModelAndView("error");
    mv.addObject("exception", ex);
    System.out.println("in testExceptionHandler");
    return mv;
}
    
@RequestMapping("/error")
public String error(){
    int i = 5/0;
    return "hello";
}

  2.处理全局异常(所有Controller)

1
2
3
4
5
6
7
8
9
10
@ControllerAdvice
public class testControllerAdvice {
    @ExceptionHandler
    public ModelAndView exceptionHandler(Exception ex){
        ModelAndView mv = new ModelAndView("error");
        mv.addObject("exception", ex);
        System.out.println("in testControllerAdvice");
        return mv;
    }
}

  3.另一种处理全局异常的方法

  在SpringMVC配置文件中配置

1
2
3
4
5
6
7
8
<!-- configure SimpleMappingExceptionResolver -->
<bean class="org.<span id="16_nwp" style="width: auto; height: auto; float: none;"><a id="16_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="16" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.web.<span id="17_nwp" style="width: auto; height: auto; float: none;"><a id="17_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=servlet&k0=servlet&kdi0=0&luki=5&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="17" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">servlet</span></a></span>.handler.SimpleMappingExceptionResolver">
    <property name="exceptionMappings">
        <props>
            <prop key="java.lang.ArithmeticException">error</prop>
        </props>
    </property>
</bean>

  error是出错页面

 十五、设置一个自定义拦截器

  1.创建一个MyInterceptor类,并实现HandlerInterceptor接口

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
public class MyInterceptor implements HandlerInterceptor {
 
    @Override
    public void afterCompletion(HttpServletRequest arg0,
            HttpServletResponse arg1, Object arg2, Exception arg3)
            throws Exception {
        System.out.println("afterCompletion");
    }
 
    @Override
    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
            Object arg2, ModelAndView arg3) throws Exception {
        System.out.println("postHandle");
    }
 
    @Override
    public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,
            Object arg2) throws Exception {
        System.out.println("preHandle");
        return true;
    }
 
}

  2.在SpringMVC的配置文件中配置

1
2
3
4
5
6
7
<!-- interceptor setting -->
<<span id="15_nwp" style="width: auto; height: auto; float: none;"><a id="15_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=mvc&k0=mvc&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="15" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">mvc</span></a></span>:interceptors>
    <mvc:interceptor>
        <mvc:mapping path="/mvc/**"/>
        <bean class="test.SpringMVC.Interceptor.MyInterceptor"></bean>
    </mvc:interceptor>       
</mvc:interceptors>

  3.拦截器执行顺序

 十六、表单的验证(使用Hibernate-validate)及国际化

  1.导入Hibernate-validate需要的jar包

(未选中不用导入)

  2.编写实体类User并加上验证注解

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
public class User {
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Date getBirth() {
        return birth;
    }
    public void setBirth(Date birth) {
        this.birth = birth;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", birth=" + birth + "]";
    }   
    private int id;
    @NotEmpty
    private String name;
 
    @Past
    @DateTimeFormat(pattern="yyyy-MM-dd")
    private Date birth;
}

  ps:@Past表示时间必须是一个过去值

  3.在jsp中使用SpringMVC的form表单

1
2
3
4
5
6
<form:form action="form/add" method="post" modelAttribute="user">
    id:<form:input path="id"/><form:errors path="id"/><br>
    name:<form:input path="name"/><form:errors path="name"/><br>
    birth:<form:input path="birth"/><form:errors path="birth"/>
    <input type="submit" value="submit">
</form:form>

  ps:path对应name

  4.Controller中代码

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
@Controller
@RequestMapping("/form")
public class formController {
    @RequestMapping(value="/add",method=RequestMethod.POST)   
    public String add(@Valid User u,BindingResult br){
        if(br.getErrorCount()>0){           
            return "addUser";
        }
        return "showUser";
    }
     
    @RequestMapping(value="/add",method=RequestMethod.GET)
    public String add(Map<String,Object> map){
        map.put("user",new User());
        return "addUser";
    }
}

  ps:

  1.因为jsp中使用了modelAttribute属性,所以必须在request域中有一个"user".

  2.@Valid 表示按照在实体上标记的注解验证参数

  3.返回到原页面错误信息回回显,表单也会回显

  5.错误信息自定义

  在src目录下添加locale.properties

NotEmpty.user.name=name can't not be empty
Past.user.birth=birth should be a past value
DateTimeFormat.user.birth=the format of input is wrong
typeMismatch.user.birth=the format of input is wrong
typeMismatch.user.id=the format of input is wrong

  在SpringMVC配置文件中配置

1
2
3
4
<!-- configure the locale resource -->
<bean id="messageSource" class="org.<span id="12_nwp" style="width: auto; height: auto; float: none;"><a id="12_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="12" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.context.support.ResourceBundleMessageSource">
    <property name="basename" value="locale"></property>
</bean>

  6.国际化显示

  在src下添加locale_zh_CN.properties

username=账号
password=密码

  locale.properties中添加

username=user name
password=password

  创建一个locale.jsp

1
2
3
4
<body>
  <fmt:message key="username"></fmt:message>
  <fmt:message key="password"></fmt:message>
</body>

  在SpringMVC中配置

1
2
<!-- make the jsp page can be visited -->
<<span id="11_nwp" style="width: auto; height: auto; float: none;"><a id="11_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=mvc&k0=mvc&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="11" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">mvc</span></a></span>:view-controller path="/locale" view-name="locale"/>

  让locale.jsp在WEB-INF下也能直接访问

  最后,访问locale.jsp,切换浏览器语言,能看到账号和密码的语言也切换了

 十七、压轴大戏--整合SpringIOC和SpringMVC

  1.创建一个test.SpringMVC.integrate的包用来演示整合,并创建各类

  2.User实体类

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
public class User {
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Date getBirth() {
        return birth;
    }
    public void setBirth(Date birth) {
        this.birth = birth;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", birth=" + birth + "]";
    }   
    private int id;
    @NotEmpty
    private String name;
 
    @Past
    @DateTimeFormat(pattern="yyyy-MM-dd")
    private Date birth;
}

  3.UserService类

1
2
3
4
5
6
7
8
9
10
@Component
public class UserService {
    public UserService(){
        System.out.println("UserService Constructor...\n\n\n\n\n\n");
    }
     
    public void save(){
        System.out.println("save");
    }
}

  4.UserController

1
2
3
4
5
6
7
8
9
10
11
12
13
@Controller
@RequestMapping("/integrate")
public class UserController {
    @Autowired
    private UserService userService;
     
    @RequestMapping("/user")
    public String saveUser(@RequestBody @ModelAttribute User u){
        System.out.println(u);
        userService.save();
        return "hello";
    }
}

  5.Spring配置文件

  在src目录下创建SpringIOC的配置文件applicationContext.xml

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.<span id="4_nwp" style="width: auto; height: auto; float: none;"><a id="4_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="4" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.org/schema/beans"
    xmlns:<span id="5_nwp" style="width: auto; height: auto; float: none;"><a id="5_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=xsi&k0=xsi&kdi0=0&luki=6&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="5" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">xsi</span></a></span>="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.<span id="6_nwp" style="width: auto; height: auto; float: none;"><a id="6_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="6" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.org/schema/context/spring-context.xsd
        "
        <span id="7_nwp" style="width: auto; height: auto; float: none;"><a id="7_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=xml&k0=xml&kdi0=0&luki=3&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="7" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">xml</span></a></span>ns:util="http://www.springframework.org/schema/util"
        xmlns:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"   
        >
    <context:component-scan base-package="test.SpringMVC.integrate">
        <context:exclude-filter type="annotation"
            expression="org.<span id="8_nwp" style="width: auto; height: auto; float: none;"><a id="8_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="8" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.stereotype.Controller"/>
        <context:exclude-filter type="annotation"
            expression="org.springframework.web.bind.annotation.ControllerAdvice"/>       
    </context:component-scan>
     
</beans>

  在Web.xml中添加配置

1
2
3
4
5
6
7
8
<!-- configure the springIOC -->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param
  <param-name>contextConfigLocation</param-name
  <param-value>classpath:applicationContext.<span id="3_nwp" style="width: auto; height: auto; float: none;"><a id="3_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=xml&k0=xml&kdi0=0&luki=3&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="3" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">xml</span></a></span></param-value>
</context-param>

  6.在SpringMVC中进行一些配置,防止SpringMVC和SpringIOC对同一个对象的管理重合

1
2
3
4
5
6
7
<!-- scan the package and the sub package -->
    <context:component-scan base-package="test.SpringMVC.integrate">
        <context:include-filter type="annotation"
            expression="org.<span id="2_nwp" style="width: auto; height: auto; float: none;"><a id="2_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=20&is_app=0&jk=ffa2c604817462f5&k=spring&k0=spring&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=06011078_cpr&rb=0&rs=1&seller_id=1&sid=f56274814c6a2ff&ssp2=1&stid=9&t=tpclicked3_hc&td=1922429&tu=u1922429&u=http%3A%2F%2Fwww%2Eadmin10000%2Ecom%2Fdocument%2F6436%2Ehtml&urlid=0" target="_blank" mpid="2" style="text-decoration: none;"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">spring</span></a></span>framework.stereotype.Controller"/>
        <context:include-filter type="annotation"
            expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
    </context:component-scan>

 十八、SpringMVC详细运行流程图

 十九、SpringMVC与struts2的区别

  1、springmvc基于方法开发的,struts2基于类开发的。springmvc将url和controller里的方法映射。映射成功后springmvc生成一个Handler对象,对象中只包括了一个method。方法执行结束,形参数据销毁。springmvc的controller开发类似web service开发。

  2、springmvc可以进行单例开发,并且建议使用单例开发,struts2通过类的成员变量接收参数,无法使用单例,只能使用多例。

  3、经过实际测试,struts2速度慢,在于使用struts标签,如果使用struts建议使用jstl。

SpringMVC详细实例的更多相关文章

  1. springmvc 项目完整示例01 需求与数据库表设计 简单的springmvc应用实例 web项目

    一个简单的用户登录系统 用户有账号密码,登录ip,登录时间 打开登录页面,输入用户名密码 登录日志,可以记录登陆的时间,登陆的ip 成功登陆了的话,就更新用户的最后登入时间和ip,同时记录一条登录记录 ...

  2. 使用WebUploader客户端批量上传图片,后台使用springMVC接收实例

    使用WebUploader客户端批量上传图片,后台使用springMVC接收实例 我是搞Java后台的,因为最近主管让用webUploader写客户端,但是在网上找了很多,能够复制就能用的并没有几个, ...

  3. 【SpringMVC架构】SpringMVC入门实例,解析工作原理(二)

    上篇博文,我们简单的介绍了什么是SpringMVC.这篇博文.我们搭建一个简单SpringMVC的环境,使用非注解形式实现一个HelloWorld实例,从简单入手,逐步深入. 环境准备 我们须要有主要 ...

  4. 史上最全最强SpringMVC详细示例实战教程【good】

    1)Spring MVC 在调用处理方法之前,在请求线程中自动的创建一个隐含的模型对象. 2)调用所有方法级的 标注了 @ModelAttribute 的方法,并将方法返回值添加到隐含的模型对象中. ...

  5. [Linux]Linux下安装和配置solr/tomcat/IK分词器 详细实例二.

    为了更好的排版, 所以将IK分词器的安装重启了一篇博文,  大家可以接上solr的安装一同查看.[Linux]Linux下安装和配置solr/tomcat/IK分词器 详细实例一: http://ww ...

  6. SpringMVC详细示例

    一.SpringMVC基础入门,创建一个HelloWorld程序 0.框架结构 1.首先,导入SpringMVC需要的jar包. 2.添加Web.xml配置文件中关于springmvc的配置 < ...

  7. 巩固一下:SpringMVC详细示例实战教程

    一.SpringMVC基础入门,创建一个HelloWorld程序 1.首先,导入SpringMVC需要的jar包. 2.添加Web.xml配置文件中关于SpringMVC的配置 1 2 3 4 5 6 ...

  8. 史上最全最强SpringMVC详细示例实战教程

    一.SpringMVC基础入门,创建一个HelloWorld程序 1.首先,导入SpringMVC需要的jar包. 2.添加Web.xml配置文件中关于SpringMVC的配置 1 2 3 4 5 6 ...

  9. SpringMVC详细示例实战教程

    一.SpringMVC基础入门,创建一个HelloWorld程序 1.首先,导入SpringMVC需要的jar包. 2.添加Web.xml配置文件中关于SpringMVC的配置 1 2 3 4 5 6 ...

随机推荐

  1. 使用Visual Studio 2019将ASP.NET Core发布为linux-arm64程序

    前言 前段时间入手了一台树莓派4B,一直闲置未使用,最近工作需要,要在上面跑下.NET Core程序,由于树莓派4B使用的是ARM架构,并且支持64位操作系统,为了充分发挥树莓派性能,我的这台树莓派安 ...

  2. linux 虚拟网络设备的使用

    1. linux 常见虚拟网络设备分类 常见虚拟网络设备有:bridge, tun/tap, veth-pairs, macvlan, macvtap等.有一篇博文写的挺好的,图文并茂:虚拟网络设备, ...

  3. 组件通过props属性传值

    组件之间的传值 组件是一个单独功能模块的封装,有属于自己的data和methods,一个组件的 data 选项必须是一个函数 为什么必须是函数:因为只有当data是函数时,不同实例调用同一个组件时才会 ...

  4. Java 源码如何分析?

    如何阅读源码?万事开头难,源码从哪里开始看?我也是刚对源码的阅读研究不深,但是可以谈谈自己的源码阅读感受. 刚开始吧,只是对某些代码的实现原理感到好奇,好奇是怎么实现这种功能,实现这种效果的,对其背后 ...

  5. 个人网站迁移之旅:从博客到知识库,从 Hexo 到 Docusaurus

    或是出于跟风,或是为了简历能好看点,2020 年 2 月,在翻看了中文互联网大量的「免费个人网页搭建教程」后,我选择了 Hexo + Github Pages 的方案,找了一款看上去还不错的主题,搭建 ...

  6. 解决SpringBoot项目部署到服务器后访问Tomcat后404,无法访问Controller

  7. [第二章]c++学习笔记4(复制构造函数)

    性质 (1)只有一个参数,即被同类对象的引用. 注 起作用的三种情况 注 常量引用参数

  8. Python基础(使用模块)

    #!/usr/bin/env python3 # -*- coding: utf-8 -*- ' a test module ' __author__ = 'Michael Liao' import ...

  9. 用户案例 | 腾讯小视频&转码平台云原生容器化之路

    作者 李汇波,腾讯业务运维高级工程师,目前就职于TEG 云架构平台部 技术运营与质量中心,现负责微信.QQ社交类业务的视频转码运维. 摘要 随着短视频兴起和快速发展,对于视频转码处理的需求也越来越多. ...

  10. [bzoj5340]假面

    修改:维护g[i][j]表示第i个数为j的概率,从前往后转移 转移方程:g[id][i]=g[id][i-1]*p+g[id][i]*(1-p),初始g[i][a[i]]=1 询问:对于每一个人i,输 ...