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基于spring 3.0mvc 框架的文件上传实现

1. spring使用了apache-commons下得上传组件,因此,我们需要引入两个jar包:

1. apache-commons-fileupload.jar
2. apache-commons-io.jar

2.  springmvc-servlet.xml配置文件中,增加CommonsMultipartResoler配置:

<!-- 处理文件上传 -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver" > 
    <property name="defaultEncoding" value="gbk"/> <!-- 默认编码 (ISO-8859-1) --> 
    <property name="maxInMemorySize" value="10240"/> <!-- 最大内存大小 (10240)--> 
    <property name="uploadTempDir" value="/upload/"/> <!-- 上传后的目录名 (WebUtils#TEMP_DIR_CONTEXT_ATTRIBUTE) --> 
    <property name="maxUploadSize" value="-1"/> <!-- 最大文件大小,-1为无限止(-1) --> 
</bean>

3.  建立upload.jsp页面,内容如下:

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <title>测试springmvc中上传的实现</title>
    </head>
    <body>
<form action="upload.do"  method="post" enctype="multipart/form-data">
            <input type="text" name="name" />
            <input type="file" name="file" />
            <input type="submit" />
        </form>
    </body>
</html>

4. 建立控制器,代码如下:

package com.sxt.web;
  
import java.io.File;
import java.util.Date;
  
import javax.servlet.ServletContext;
  
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.context.ServletContextAware;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
  
@Controller
public class FileUploadController implements ServletContextAware {
  
    private ServletContext servletContext;
      
    @Override
    public void setServletContext(ServletContext context) {
        this.servletContext  = context;
    }
      
    @RequestMapping(value="/upload.do", method = RequestMethod.POST)
    public String handleUploadData(String name,@RequestParam("file")[一定要加。]CommonsMultipartFile file){
        if (!file.isEmpty()) {
               String path = this.servletContext.getRealPath("/tmp/");  //获取本地存储路径
               System.out.println(path);
               String fileName = file.getOriginalFilename();
               String fileType = fileName.substring(fileName.lastIndexOf("."));
               System.out.println(fileType); 
               File file2 = new File(path,new Date().getTime() + fileType); //新建一个文件
               try {
                    file.getFileItem().write(file2); //将上传的文件写入新建的文件中
               } catch (Exception e) {
                    e.printStackTrace();
               }
               return "redirect:upload_ok.jsp";
            }else{
                return "redirect:upload_error.jsp";
            }
    }
}

5. 建立upload_ok.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <body>
       <h1>上传成功!</h1>
  </body>
</html>

 

6. 建立upload_error.jsp页面

  <%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <body>
       <h1>上传失败!</h1>
  </body>
</html>

发布项目,运行测试://localhost:8080/springmvc03/upload.jsp

 

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