本文主要是介绍Struts1实现文件上传，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
引言
学习了框架之后，就要进行小例子的应用了……下面小编就敲了一个文件上传的例子，还请大家指教！
主要步骤
1、创建用于文件上传的jsp相关页面
1）index.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><li>测试strust文件上传</li><form action="upload.do" method="post" enctype="multipart/form-data">标题：<input type="text" name="title"><br>文件：<input type="file" name="myfile"><br><input type="submit" value="提交"></form></body>
</html>
2）upload_success.jsp
<%@ page language="java" contentType="text/html; charset=GB18030"pageEncoding="GB18030"%>
<!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=GB18030">
<title>Insert title here</title>
</head>
<body>文件上传成功！<br>标题=【${uploadForm.title }】<br>文件名称=【${uploadForm.myfile.fileName }】<br>
</body>
</html>2、创建ActionForm
UploadActionForm
package com.bjpowernode.struts;import org.apache.struts.action.ActionForm;
import org.apache.struts.upload.FormFile;@SuppressWarnings("serial")
public class UploadActionForm extends ActionForm {private String title;//上传的文件必须采用FormFile声明private FormFile myfile;public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public FormFile getMyfile() {return myfile;}public void setMyfile(FormFile myfile) {this.myfile = myfile;}
}
3、创建Action
UploadTestAction
package com.bjpowernode.struts;import java.io.FileOutputStream;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;/*** 上传Action* @author Administrator**/
public class UploadTestAction extends Action {@Overridepublic ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {UploadActionForm uaf = (UploadActionForm)form;System.out.println("title=" + uaf.getTitle());System.out.println("fileName=" + uaf.getMyfile().getFileName());FileOutputStream fos = new FileOutputStream("c:\\" + uaf.getMyfile().getFileName());fos.write(uaf.getMyfile().getFileData());fos.flush();fos.close();return mapping.findForward("success");}}
4、配置
struts-config.xml
<?xml version="1.0" encoding="ISO-8859-1" ?><!DOCTYPE struts-config PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN""http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd"><struts-config><form-beans> <form-bean name="uploadForm" type="com.bjpowernode.struts.UploadActionForm"/></form-beans><action-mappings> <action path="/upload"type="com.bjpowernode.struts.UploadTestAction"name="uploadForm"scope="request" ><forward name="success" path="/upload_success.jsp"/></action></action-mappings><controller maxFileSize="10M"/>
</struts-config>
效果
总结
1、在Struts中，一个FormFile类型的对象对应Form表单中传送的一个文件，Struts将上传的文件信息封装进FormFile中，通过FormFile提供的方法可以方便的进行文件的操作。其实FormFile是一个接口，位于 org.apache.struts.upload.FormFile 中，它定义了操作上传文件的基本方法。
2、配置文件中限制文件大小
<controller maxFileSize="10M"/>
3、 注意：操作struts-config.xml文件时应当特别注意各个节点间的顺序，因为Struts要求配置文件的各个元素顺序有一定的要求，顺序一旦被打乱，也就意味着web容器即将进入瘫痪状态，因此在添加<controler>节点时，要将此节点添加在<action-mapping>和<message-resources>节点之间。
上传文件Demo已经做完了，期待小编的下次分享吧~~~~
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