http响应头设置

    protected void service(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // 设置响应头数据
        response.setHeader(null, "HTTP/1.1 200 OK");
        response.setHeader("Server", "Apache-Coyote/1.1");
        response.setHeader("Date", "Sun, 10 Jan 2016 04:09:02 GMT");
        // 当有下面这一个头设置时，访问得不到想要的json数据，不设置就可以访问并得到json数据
        // response.setHeader("Transfer-Encoding", "chunked");
        response.setHeader("Content-Type", "application/json;charset=UTF-8");

        // 本地的一个json数据文件
        File file = new File("D:/Environments/test.json");
        InputStream in = new FileInputStream(file);
        byte[] buffer = new byte[];
        int num = ;
        OutputStream out = response.getOutputStream();
        while((num=in.read(buffer))!=-){
            out.write(buffer, , num);
        }
        if(in!=null){
            in.close();
        }
    }

在上述的响应头Transfer-Encoding设置了，为什么不能够得到json数据？未知

D:/Environments/test.json

{"rows":[{"id":"","data":["","","工地监测_金石·星海湾·大门","工地","魏都区","是","2015-12-10 18:05:36","<a href='javascript:void(0)' onclick=editProject('1');>工程信息</a>/<a href='javascript:void(0)' onclick=editMonitorType('1');>门限设置</a>/<a href='javascript:void(0)' onclick=editGkz('1');>关联国控站</a>/<a href='javascript:void(0)' onclick=editMeasure('1');>设施标准</a>"]},{"id":"","data":["","","工地监测_金汇广场·大门","工地","魏都区","是","2015-12-11 11:05:52","<a href='javascript:void(0)' onclick=editProject('2');>工程信息</a>/<a href='javascript:void(0)' onclick=editMonitorType('2');>门限设置</a>/<a href='javascript:void(0)' onclick=editGkz('2');>关联国控站</a>/<a href='javascript:void(0)' onclick=editMeasure('2');>设施标准</a>"]},{"id":"","data":["","","工地监测_壹号城邦东门","工地","魏都区","是","2015-12-11 11:07:53","<a href='javascript:void(0)' onclick=editProject('3');>工程信息</a>/<a href='javascr
        ipt:void()' onclick=editMonitorType('');>门限设置</a>/<a href='javascript:void()' onclick=editGkz('');>关联国控站</a>/<a href='javascript:void()' onclick=editMeasure('');>设施标准</a>"]},{"id":"4","data":["0","4","工地监测_许昌恒大绿洲三期","工地","魏都区","是","2015-12-11 11:08:40","<a href='javascript:void()' onclick=editProject('');>工程信息</a>/<a href='javascript:void()' onclick=editMonitorType('');>门限设置</a>/<a href='javascript:void()' onclick=editGkz('');>关联国控站</a>/<a href='javascript:void()' onclick=editMeasure('');>设施标准</a>"]},{"id":"5","data":["0","5","工地监测_金石·星海湾·内部","工地","魏都区","是","2015-12-11 11:10:21","<a href='javascript:void()' onclick=editProject('');>工程信息</a>/<a href='javascript:void()' onclick=editMonitorType('');>门限设置</a>/<a href='javascript:void()' onclick=editGkz('');>关联国控站</a>/<a href='javascript:void()' onclick=editMeasure('');>设施标准</a>"
        ]},{"id":"","data":["","","工地监测_财富广场","工地","魏都区","是","2015-12-11 11:11:00","<a href='javascript:void(0)' onclick=editProject('6');>工程信息</a>/<a href='javascript:void(0)' onclick=editMonitorType('6');>门限设置</a>/<a href='javascript:void(0)' onclick=editGkz('6');>关联国控站</a>/<a href='javascript:void(0)' onclick=editMeasure('6');>设施标准</a>"]},{"id":"","data":["","","工地监测_金汇广场·内部","工地","魏都区","是","2015-12-11 11:12:32","<a href='javascript:void(0)' onclick=editProject('7');>工程信息</a>/<a href='javascript:void(0)' onclick=editMonitorType('7');>门限设置</a>/<a href='javascript:void(0)' onclick=editGkz('7');>关联国控站</a>/<a href='javascript:void(0)' onclick=editMeasure('7');>设施标准</a>"]},{"id":"","data":["","","工地监测_南关村安置小区项目","工地","魏都区","是","2015-12-11 11:13:29","<a href='javascript:void(0)' onclick=editProject('8');>工程信息</a>/<a href='javascript:void(0
        )' onclick=editMonitorType('');>门限设置</a>/<a href='javascript:void()' onclick=editGkz('');>关联国控站</a>/<a href='javascript:void()' onclick=editMeasure('');>设施标准</a>"]},{"id":"9","data":["0","9","工地监测_澜菲溪岸","工地","魏都区","是","2015-12-11 11:14:03","<a href='javascript:void()' onclick=editProject('');>工程信息</a>/<a href='javascript:void()' onclick=editMonitorType('');>门限设置</a>/<a href='javascript:void()' onclick=editGkz('');>关联国控站</a>/<a href='javascript:void()' onclick=editMeasure('');>设施标准</a>"]},{"id":"10","data":["0","10","工地监测_壹号城邦西门","工地","魏都区","是","2015-12-11 11:15:36","<a href='javascript:void()' onclick=editProject('');>工程信息</a>/<a href='javascript:void()' onclick=editMonitorType('');>门限设置</a>/<a href='javascript:void()' onclick=editGkz('');>关联国控站</a>/<a href='javascript:void()' onclick=editMeasure('');>设施标准</a>"]}]}
        

注意：response.setHeader(key,value)的key，我同一个项目在家中电脑上可以设置为null，不会报空异常，但是在公司运行就会报nullException