Struts2的开发应用
一、实验目的：
理解MVC设计模式的基本概念和Java Web开发的两种模式Model1和Model2，以及Struts开发工作流程和基本应用。
二、实验环境：
win10+myeclipse10+tomcat7.0+Struts 2 Core Libraries
三、实验内容：
（一） Struts2的文件上传
新建一个Java Web工程，在工程目录下导入 Struts 2 Core Libraries。
1． 文件上传页面，其中包含两个表单域：文件标题和文件浏览域
-
- 程序功能：上传页面，包含两个表单域。
- 新建upload.html文件
- upload.html程序源码：
<!DOCTYPE html>
<html>
<head>
<title>简单的文件上传</title>
<meta http-equiv="Content-Type" content="text/html;charset=GBK">
</head>
<body>
<form action="upload.action" method="post" enctype="multipart/form-data">
文件标题：<input type="text" name="title"><br>
选择文件：<input type="file" name="upload"><br>
<input value="上传" type="submit">
</form>
</body>
</html>2．处理上传请求的Action类
新建UploadAction.java文件，包名为lee
UploadAction.java源代码：
package lee;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UploadAction extends ActionSupport {
private String title;
private File upload;
private String uploadContentType;
private String uploadFileName;
//接受依赖注入的属性
private String savePath;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public String getSavePath() throws Exception{
return ServletActionContext.getRequest().getRealPath(savePath);
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
@Override
public String execute() throws Exception {
System.out.println("开始上***个文件--------------");
System.out.println(getSavePath());
System.out.println("========="+getUploadFileName());
System.out.println("========="+getUploadContentType());
System.out.println("========="+getUpload());
//以服务器的文件保存地址和原文件名建立上传文件输出流
FileOutputStream fos=new FileOutputStream(getSavePath()+"\\"+getUploadFileName());
FileInputStream fis=new FileInputStream(getUpload());
byte[] buffer=new byte[1024];
int len=0;
while((len=fis.read(buffer))>0)
{
fos.write(buffer, 0, len);
}
return SUCCESS;
}
}- 配置文件上传的Action
在src目录下的struts.xml文件进行配置，struts.xml源代码如下：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<constant name="struts.custom.i18n.resources" value="globalMessages"/>
<constant name="struts.i18n.encoding" value="GBK"/>
<package name="lee" extends="struts-default">
<action name="upload" class="lee.UploadAction">
<param name="savePath">/upload</param>
<result>/succ.jsp</result>
</action>
</package>
</struts>web.xml源代码：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.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>*.action</url-pattern>
</filter-mapping>
</web-app>
新建一个succ.jsp页面，源代码：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>成功页面</title>
</head>
<body>
文件上传成功！
</body>
</html>注意：需要在tomcat的安装目录下找到webapps文件夹下的你新建的Java Web工程的文件夹，在该工程目录下新建一个文件夹，命名为upload，（文件名需要和之前的配置文件相符）。否则可能上传文件失败。
运行结果：
