package com.zhao.action; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import com.opensymphony.xwork2.ActionSupport; /** * * @author: zhao * @time: 2016年5月14日 * * @description:strut2文件上传 */ public class FileUpAction extends ActionSupport { private static final long serialVersionUID = 1L; private File upload;// 上传文件 private String uploadFileName;// 文件名称 private String uploadContentType;// 文件类型 static final String Path = "E://OA/"; @Override public String execute() throws Exception { InputStream inputStream = new FileInputStream(upload); File target = new File(Path + uploadFileName); OutputStream outputStream = new FileOutputStream(target); System.out.println(upload.getName() + ":" + upload.getPath()); BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream); BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(outputStream); int c; while ((c = bufferedInputStream.read()) != -1) { bufferedOutputStream.write(c); bufferedOutputStream.flush();// 清空缓存 } bufferedInputStream.close(); bufferedOutputStream.close(); return SUCCESS; } public File getUpload() { return upload; } public void setUpload(File upload) { this.upload = upload; } public String getUploadFileName() { return uploadFileName; } public void setUploadFileName(String uploadFileName) { this.uploadFileName = uploadFileName; } public String getUploadContentType() { return uploadContentType; } public void setUploadContentType(String uploadContentType) { this.uploadContentType = uploadContentType; } }
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.devMode" value="true" /> <package name="file" namespace="/" extends="struts-default"> <action name="up" class="com.zhao.action.FileUpAction"> <result>down.jsp</result> </action> </package> </struts>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <form action="up.action" method="post" enctype="multipart/form-data"> <input type="file" name="upload"/> <input type="submit" value="Submit"/> </form> </body> </html>
Action struts.xml 以及前段jsp都有了，功能也实现了。但是有几个需要注意的点：
1：
private File XXX;// 上传文件
private String XXXFileName;// 文件名称
private String XXXContentType;// 文件类型
这三个内容要一致，至于XXX是什么值，是前端jsp中type 为file的那个组件的name
<input type="file" name="upload"/>
如果不一致，必然出错。
我做测试的时候把XXXFileName写成了XXXFilename，然后就无法获取正确的文件名。上传后的文件名就是null。
2：
这个报错信息是说没有找到临时路径，按道理来说是不应该出这个错误的，因为我们有默认的临时路径，既然出错了，那就解决一下：
在strtus.xml或者是struts.properties中配置struts.multipart.saveDir的值，比如说改成/tmp/。就可以了。
