使用Jersey上传文件

采用jquery.form.js异步上传图片,并结合<form>表单

<script type="text/javascript">
    //采用jquery.form.js异步上传图片,并结合<form>表单

    function uploadPicture() {
        var options = {
            //请求路径
            url : "/upload/uploadPic.do",
            dataType : "json",
            type : "post",
            success : function(data) {
                //处理结果
                //将相对路径设置给隐藏域中,提交时用
                $("#imgUrl").val(data.path);
                //将全路径设置给img标签,显示图片用
                $("#allImgUrl").attr("src", data.url);
            }
        }
        $("#jvForm").ajaxSubmit(options);
    }
</script>

<tr>
      <td width="20%" class="pn-flabel pn-flabel-h"></td>
      <td width="80%" class="pn-fcontent">
      <img width="100" height="100" id="allImgUrl" />
      <!-- 图片存在数据库的路径 -->
      <input type="hidden" id="imgUrl" name="imgUrl"></input>        
      <input type="file" onchange="uploadPicture()" name="uploadPic" /></td>
</tr>

 一定要在form表单中填写enctype="multipart/form-data"

<form id="jvForm" action="/brand/add.do" method="post" enctype="multipart/form-data">  </form>

 在springmvc.xml文件中添加文件软件器

    <!-- 图片转换器 -->
    <bean id="multipartResolver"  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize"  value="10485760"></property>
    </bean>

编写文件上传UploadController.java

package cn.lzc.code.controller.admin;

import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.FilenameUtils;
import org.json.JSONObject;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientHandlerException;
import com.sun.jersey.api.client.UniformInterfaceException;
import com.sun.jersey.api.client.WebResource;

import cn.lzc.code.web.Constants;
import cn.lzc.common.web.ResponseUtils;

/**
 * 上传文件管理Controller
 * 
 * @author admin
 *
 */
@Controller
public class UploadController {

    /**
     * 异步上传图片
     * 
     * @param uploadFile
     * @param response
     */
    @RequestMapping(value="/upload/uploadPic.do",method=RequestMethod.POST)
    public void uploadBrandPic(@RequestParam(required = false) MultipartFile uploadPic, HttpServletResponse response) {
        // 图片名称生成策略---采用时间格式(精确到毫秒)并追加随机3位(10以内)数字
        // 精确到毫秒
        DateFormat df = new SimpleDateFormat("yyyyMMddHHmmssSSS");
        String picName = df.format(new Date());
        //随机再生成3位10以内的数
        Random r=new Random();
        for (int i = 0; i < 3; i++) {
            picName+=r.nextInt(10);
        }
        //获取扩展名
        String originalFilename = uploadPic.getOriginalFilename();
        String ext = FilenameUtils.getExtension(originalFilename);
        //相对路径
        String path="upload/"+picName+"."+ext;
        //全路径
        String url="http://localhost:8088/image-web/"+path;
        
        //jersey发送另一台Tomcat（可读写）
        // 实例化Jersey
        Client client=new Client();
        //想要发送到的服务器地址，记住，必须设置tomcat服务器的权限，不然无法上传到tomcat
        //设置请求路径
        WebResource resource = client.resource(url);
        try {
            //发送开始put
            resource.put(String.class, uploadPic.getBytes());
        } catch (UniformInterfaceException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClientHandlerException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        //返回json数据给页面，（包括url回显路径，Path保存数据库的路径）
        JSONObject jo=new JSONObject();
        jo.put("path", path);
        jo.put("url", url);
        //返回数据给页面
        ResponseUtils.renderJson(response, jo.toString());
    }
}

写一个RequestUtils.java工具类，用来响应相应的数据到前台页面

package cn.lzc.common.web;

import java.io.IOException;

import javax.servlet.http.HttpServletResponse;

/**
 * Response帮助类 支持JSON XML Text
 * 
 * @author admin
 *
 */

public class ResponseUtils {
    // 发送Json
    public static void renderJson(HttpServletResponse response, String text) {
        rend(response, "application/json;charset=UTF-8", text);
    }

    // 发送xml
    public static void renderXml(HttpServletResponse response, String text) {
        rend(response, "text/xml;charset=UTF-8", text);
    }

    // 发送text
    public static void renderText(HttpServletResponse response, String text) {
        rend(response, "text/plain;charset=UTF-8", text);
    }

    // 发送
    public static void rend(HttpServletResponse response, String contextType, String text) {
        // 设置传输类型
        response.setContentType(contextType);
        // 发送
        try {
            response.getWriter().write(text);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}