struts2文件上传

最新推荐文章于 2021-05-31 23:17:54 发布

原创最新推荐文章于 2021-05-31 23:17:54 发布 · 334 阅读

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本文介绍了使用Struts2框架实现文件上传的过程，包括配置struts.xml文件、编写UploadAction处理类以及设置JSP页面等内容。

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一个简单的东西让我，弄了这么久- - !(zz!)

首先我没有，在xml文件中配置拦截器，然后Action的包名写错，还是细心的问题

注意在jsp中填写action=""的路径的时候，当前的路径一般是精确到项目名/下，所以我们不用再namespace的值前加上/了。

jsp:

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
    <form action="item/upload.action" method="post" enctype="multipart/form-data">
    	Filename:<input type="text" name="filename"><br/>
    	file:<input type="file" name="myFile"><br/>
    	<input type="submit" value="提交">
    </form>
  </body>
</html>

struts-xml

<?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">
<!-- 
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true" />

    <package name="default" namespace="/" extends="struts-default">

        <default-action-ref name="index" />

        <global-results>
            <result name="error">/WEB-INF/jsp/error.jsp</result>
        </global-results>

        <global-exception-mappings>
            <exception-mapping exception="java.lang.Exception" result="error"/>
        </global-exception-mappings>

        <action name="index">
            <result type="redirectAction">
                <param name="actionName">HelloWorld</param>
                <param name="namespace">/example</param>
            </result>
        </action>
    </package>

    <include file="example.xml"/>

-->
<struts>
	
    <constant name="struts.devMode" value="false" />
	<constant name="struts.configuration.xml.reload" value="true" />

    <package name="upload"  extends="struts-default" namespace="/item">
    	<action name="upload" class="com.struts2.struts2.UploadAction">
    		<result>/success.jsp</result>
    	</action>
    </package>
    
</struts>

UploadAction:

package com.struts2.struts2;
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.Action;
public class UploadAction {
	private String filename;
	
	private File myFile;
	
	private String myFileFileName;
	
	private String fileType;
	
	public String getFilename() {
		return filename;
	}

	public void setFilename(String filename) {
		this.filename = filename;
	}

	public File getMyFile() {
		return myFile;
	}

	public void setMyFile(File myFile) {
		this.myFile = myFile;
	}

	public String getMyFileFileName() {
		return myFileFileName;
	}

	public void setMyFileFileName(String myFileFileName) {
		this.myFileFileName = myFileFileName;
	}

	public String getFileType() {
		return fileType;
	}

	public void setFileType(String fileType) {
		this.fileType = fileType;
	}

	public String execute() throws Exception {
		InputStream is = null;
		
		OutputStream os = null;
		try {
			is = new BufferedInputStream(
					new FileInputStream(myFile));
		
			os = new BufferedOutputStream(
					new FileOutputStream("c:\\"+myFileFileName));
			int len = 0;
			byte[] buffer = new byte[10024];
			while( (len = is.read(buffer)) >0){
				os.write(buffer,0,len);
			}
		} finally{
			if(is!=null) is.close();
			if(os!=null) os.close();
		}
		return Action.SUCCESS;
	}
}

xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>FileUpload</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <filter>
  	<filter-name>struts2</filter-name>
  	<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>struts2</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>