使用Jersey上传文件

Posted 2020-11-20 limn

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

 1 package cn.lzc.code.controller.admin;
 2 
 3 import java.io.IOException;
 4 import java.text.DateFormat;
 5 import java.text.SimpleDateFormat;
 6 import java.util.Date;
 7 import java.util.Random;
 8 
 9 import javax.servlet.http.HttpServletResponse;
10 
11 import org.apache.commons.io.FilenameUtils;
12 import org.json.JSONObject;
13 import org.springframework.stereotype.Controller;
14 import org.springframework.web.bind.annotation.RequestMapping;
15 import org.springframework.web.bind.annotation.RequestMethod;
16 import org.springframework.web.bind.annotation.RequestParam;
17 import org.springframework.web.multipart.MultipartFile;
18 
19 import com.sun.jersey.api.client.Client;
20 import com.sun.jersey.api.client.ClientHandlerException;
21 import com.sun.jersey.api.client.UniformInterfaceException;
22 import com.sun.jersey.api.client.WebResource;
23 
24 import cn.lzc.code.web.Constants;
25 import cn.lzc.common.web.ResponseUtils;
26 
27 /**
28  * 上传文件管理Controller
29  * 
30  * @author admin
31  *
32  */
33 @Controller
34 public class UploadController {
35 
36     /**
37      * 异步上传图片
38      * 
39      * @param uploadFile
40      * @param response
41      */
42     @RequestMapping(value="/upload/uploadPic.do",method=RequestMethod.POST)
43     public void uploadBrandPic(@RequestParam(required = false) MultipartFile uploadPic, HttpServletResponse response) {
44         // 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
45         // 精确到毫秒
46         DateFormat df = new SimpleDateFormat("yyyyMMddHHmmssSSS");
47         String picName = df.format(new Date());
48         //随机再生成3位10以内的数
49         Random r=new Random();
50         for (int i = 0; i < 3; i++) {
51             picName+=r.nextInt(10);
52         }
53         //获取扩展名
54         String originalFilename = uploadPic.getOriginalFilename();
55         String ext = FilenameUtils.getExtension(originalFilename);
56         //相对路径
57         String path="upload/"+picName+"."+ext;
58         //全路径
59         String url="http://localhost:8088/image-web/"+path;
60         
61         //jersey发送另一台Tomcat（可读写）
62         // 实例化Jersey
63         Client client=new Client();
64         //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
65         //设置请求路径
66         WebResource resource = client.resource(url);
67         try {
68             //发送开始put
69             resource.put(String.class, uploadPic.getBytes());
70         } catch (UniformInterfaceException e) {
71             // TODO Auto-generated catch block
72             e.printStackTrace();
73         } catch (ClientHandlerException e) {
74             // TODO Auto-generated catch block
75             e.printStackTrace();
76         } catch (IOException e) {
77             // TODO Auto-generated catch block
78             e.printStackTrace();
79         }
80         //返回json数据给页面，（包括url回显路径，Path保存数据库的路径）
81         JSONObject jo=new JSONObject();
82         jo.put("path", path);
83         jo.put("url", url);
84         //返回数据给页面
85         ResponseUtils.renderJson(response, jo.toString());
86     }
87 }

 

 

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

 1 package cn.lzc.common.web;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.http.HttpServletResponse;
 6 
 7 /**
 8  * Response帮助类 支持JSON XML Text
 9  * 
10  * @author admin
11  *
12  */
13 
14 public class ResponseUtils {
15     // 发送Json
16     public static void renderJson(HttpServletResponse response, String text) {
17         rend(response, "application/json;charset=UTF-8", text);
18     }
19 
20     // 发送xml
21     public static void renderXml(HttpServletResponse response, String text) {
22         rend(response, "text/xml;charset=UTF-8", text);
23     }
24 
25     // 发送text
26     public static void renderText(HttpServletResponse response, String text) {
27         rend(response, "text/plain;charset=UTF-8", text);
28     }
29 
30     // 发送
31     public static void rend(HttpServletResponse response, String contextType, String text) {
32         // 设置传输类型
33         response.setContentType(contextType);
34         // 发送
35         try {
36             response.getWriter().write(text);
37         } catch (IOException e) {
38             // TODO Auto-generated catch block
39             e.printStackTrace();
40         }
41     }
42 }