Struts2上传图片文件，并用uuid命名图片文件名。
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title>Document</title>
<meta charset="utf-8">
</head>
<body>
<form action="upload" method="post" enctype="multipart/form-data">
<!-- 将文件以二进制的形式上传 -->
<p>选择上传文件：<input type="file" name="myFile"></p>
<p><input type="submit" value="submit"></p>
</form>
</body>
</html>
main.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE HTML>
<html>
<head>
<title>Document</title>
<meta charset="utf-8">
</head>
<body>
<p>上传成功！</p>
<p>输入文件为：<s:property value="myFile"/></p>
<p>输出文件为：<s:property value="myFileFileName"/></p>
<img src="<s:property value="'./image/' + myFileFileName"/> " alt="图像无法显示"/>
</body>
</html>
web.xml
<?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>/*</url-pattern>
</filter-mapping>
</web-app>
struts.xml
<?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.i18n.encoding" value="UTF-8"/>
<constant name="struts.configuration.xml.reload" value="true"/>
<constant name="struts.devMode" value="false"/>
<constant name="struts.multipart.maxSize" value="10485760"/>
<package name="upload-package" extends="struts-default">
<!-- 配置上传的拦截器 -->
<interceptors>
<interceptor-stack name="myStack">
<interceptor-ref name="fileUpload">
<!-- 限制上传的文件类型,这里限制为只能上传各种图片类型 -->
<param name="allowedTypes">image/bmp,image/png,image/jpg,image/jpeg</param>
<!-- 限制上传文件的大小(单位是字节)-->
<param name="maximumSize">2097152</param>
</interceptor-ref>
<!-- 引用默认的拦截器栈 -->
<interceptor-ref name="defaultStack"/>
</interceptor-stack>
</interceptors>
<action name="upload" class="top.k10000.UploadAction">
<!-- 引用拦截器 -->
<interceptor-ref name="myStack"/>
<result name="success">/main.jsp</result>
<result name="input">/index.jsp</result>
</action>
</package>
</struts> UploadAction.java
package top.k10000;
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 java.util.UUID;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UploadAction extends ActionSupport{
private static final long serialVersionUID = 1L;
private File myFile;
private String myFileFileName;
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 execute() throws Exception{
if(myFile != null){
InputStream is=null;
OutputStream os=null;
try {
String realpath= ServletActionContext.getServletContext().getRealPath("/image");
System.out.println(myFileFileName);
String str = UUID.randomUUID().toString();
String uuid = str.substring(0, 8) + str.substring(9, 13) + str.substring(14, 18) + str.substring(19, 23) + str.substring(24);
int beginIndex = myFileFileName.lastIndexOf(".");
myFileFileName = uuid+myFileFileName.substring(beginIndex);
System.out.println(myFileFileName);
is = new BufferedInputStream(new FileInputStream(myFile));
os = new BufferedOutputStream(new FileOutputStream(myFileFileName));
File file = new File(realpath);
if(!file.exists()){
file.mkdirs();
}
FileUtils.copyFile(myFile,new File(file,myFileFileName));
}finally{
if(is !=null){is.close();}
if(os!=null){os.close();}
}
return SUCCESS;
}
else{
return INPUT;
}
}
}
效果：
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