struts2实现多文件上传的示例代码
作者:iFan138 时间:2022-03-09 23:40:54
开发环境JDK1.8 eclipse struts2-2.3.31
1.创建web项目
2.导入struts2核心jar包
3.更改web.xml配置文件(只要配置好struts2的Filter就好)
4.创建src/struts.xml文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<!-- 该属性指定需要Struts2处理的请求后缀,该属性的默认值是action,即所有匹配*.action的请求都由Struts2处理。
如果用户需要指定多个请求后缀,则多个后缀之间以英文逗号(,)隔开。 -->
<constant name="struts.action.extension" value="do" />
<!-- 设置浏览器是否缓存静态内容,默认值为true(生产环境下使用),开发阶段最好关闭 -->
<constant name="struts.serve.static.browserCache" value="false" />
<!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,默认值为false(生产环境下使用),开发阶段最好打开 -->
<constant name="struts.configuration.xml.reload" value="true" />
<!-- 开发模式下使用,这样可以打印出更详细的错误信息 -->
<constant name="struts.devMode" value="true" />
<!-- 默认的视图主题 -->
<constant name="struts.ui.theme" value="simple" />
<!--<constant name="struts.objectFactory" value="spring" />-->
<!--解决乱码 -->
<constant name="struts.i18n.encoding" value="UTF-8" />
<!-- 指定允许上传的文件最大字节数。默认值是2097152(2M) -->
<constant name="struts.multipart.maxSize" value="10701096"/>
<!-- 设置上传文件的临时文件夹,默认使用javax.servlet.context.tempdir -->
<constant name="struts.multipart.saveDir " value="d:/tmp" />
<package name="upload" extends="struts-default">
<action name="fileUpload" class="com.ifan.action.FileUpload">
<!-- 动态设置savePath的属性值 -->
<param name="savePath">WEB-INF/images</param>
<result name="success">/success.jsp</result>
<result name="input">/error.jsp</result>
<interceptor-ref name="fileUpload">
<!-- 文件过滤 -->
<param name="allowedTypes">image/bmp,image/png,image/gif,image/jpeg</param>
<!-- 文件大小, 以字节为单位 -->
<param name="maximumSize">1025956</param>
</interceptor-ref>
<!-- 默认 * 必须放在fileUpload之后,否则无效 -->
<interceptor-ref name="defaultStack" />
</action>
</package>
</struts>
5.创建src/com.ifan.action.FileUpload.Java
package com.ifan.action;
import java.io.File;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class FileUpload extends ActionSupport{
private File[] image; //上传的文件
private String[] imageFileName; //文件名称
private String[] imageContentType; //文件类型
public String execute() throws Exception {
ServletActionContext.getRequest().setCharacterEncoding("UTF-8");
String realpath = ServletActionContext.getServletContext().getRealPath("/images");
System.out.println(realpath);
if (image != null) {
File savedir=new File(realpath);
if(!savedir.getParentFile().exists())
savedir.getParentFile().mkdirs();
for(int i=0;i<image.length;i++){
File savefile = new File(savedir, imageFileName[i]);
FileUtils.copyFile(image[i], savefile);
}
ActionContext.getContext().put("message", "文件上传成功");
}
return "success";
}
public File[] getImage() {
return image;
}
public void setImage(File[] image) {
this.image = image;
}
public String[] getImageContentType() {
return imageContentType;
}
public void setImageContentType(String[] imageContentType) {
this.imageContentType = imageContentType;
}
public String[] getImageFileName() {
return imageFileName;
}
public void setImageFileName(String[] imageFileName) {
this.imageFileName = imageFileName;
}
}
6.创建WebContent/index.jsp ,作为上传文件的页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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%>" rel="external nofollow" >
<title>My JSP 'hello.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" rel="external nofollow" >
-->
</head>
<body>
<!-- Struts2的文件上传标签 -->
<s:form action="fileUpload" namespace="/" method="POST" enctype="multipart/form-data">
<!-- 该name需要和后台的File类型的名字对应起来,否则将得不到该文件 size 上传文件的大小 -->
<s:file name="image" label="Select a File to upload" size="40" />
<s:file name="image" label="Select a File to upload" size="40" />
<s:submit value="submit" name="submit" />
</s:form>
</body>
</html>
7.创建WebContent/success.jsp 作为文件上传成功跳转的页面,创建WebContent/error.jsp 作为文件上传失败的页面 , 创建WebContent/images文件夹,作为上传文件的存储位置
来源:http://blog.csdn.net/ifan138/article/details/61206275
标签:struts,文件,上传
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