一、首先搭建Struts框架
第一步：引入Strusts2所必须的jar包
第二步：创建并配置web.xml文件，在其中配置Struts2的核心过滤器
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Upload</display-name>
<!-- Struts2 的框架的核心过滤器的配置 start！！ -->
<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>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- Struts2 end !!-->
</web-app>
第三步：创建Struts.xml文件
二，编写代码
1.首先编写前台上传的表单界面：设置enctype="multipart/form-data"属性
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!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>简单的文件上传</title>
</head>
<body>
<s:fielderror/>
<s:form action="uploadPro" enctype="multipart/form-data">
<s:textfield name="title" label="文件标题"/><br/>
<s:file name="upload" label="选择文件"/>
<s:submit value="上传"/>
</s:form>
</body>
</html>
2.编写Action类来接收前端传过来的数据
package com.cong.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UploadAction extends ActionSupport {
private static final long serialVersionUID = 1L;
//封装文件标题请求参数的属性
private String title;
//封装上传文件域的属性
private File upload;
//封装上传文件类型的属性
private String uploadContentType;
//封装上传文件名的属性
private String uploadFileName;
//直接在struts.xml文件中配置值的方法
private String savePath;
//返回文件保存位置
public String getSavePath() {
return ServletActionContext.getServletContext()
.getRealPath("/"+savePath); //设置上传文件的保存位置
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
//相应setter和getter方法
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;
}
@Override
public String execute() throws Exception {
//文件输入流获取上传的二进制
FileInputStream fis = new FileInputStream(getUpload());
//服务器的文件保存地址和源文件名建立上传文件输出流
FileOutputStream fos = new FileOutputStream(getSavePath()+
"\\"+getUploadFileName());byte[] buffer = new byte[1024]; //创建一个缓冲字节数组
int len = 0;
while ((len = fis.read(buffer)) > 0){ //循环节读取的的字节数据写到服务器文件夹中
fos.write(buffer, 0, len);
}
return SUCCESS;
}
}
3、配置struts.xml文件
<?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.custom.il8n.resources" value="mess"></constant>
<!-- 设置应用使用的解码集 -->
<constant name="struts.il8n.encoding" value="UTF-8"></constant>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="true" />
<package name="lee" extends="struts-default">
<action name="uploadPro" class="com.cong.action.UploadAction">
<!-- 配置fileUpload拦截器 -->
<interceptor-ref name="fileUpload">
<!-- 允许上传的文件类型 ，均为图片类型-->
<param name="allowedTypes">image/jpeg,image/png,image/gif</param>
<!-- 允许上传的文件大小 -->
<param name="maximumSize">1024*1024</param>
</interceptor-ref>
<!-- 配置默认拦截器 ，切记！！ -->
<interceptor-ref name="defaultStack"/>
<param name="savePath">/images</param> <!--g给savePath属性赋值-->
<result name="input">index.jsp</result>
<result>/WEB-INF/content/succ.jsp</result>
</action>
<action name="*">
<result>/WEB-INF/content/{1}.jsp</result>
</action>
</package>
</struts>
4.编写succ.jsp文件，上传成功后显示结果界面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!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>上传成功</title>
</head>
<body>
上传成功<br/>
文件标题:<s:property value="title"/><br/> <!--显示传过来的字符串数据-->
文件为：<img src="${pageContext.request.contextPath}/images/<s:property value="+uploadFileName"/>"/><br/> <!--显示上传的图片-->
</body>
</html>
时间： 2024-10-08 10:28:08