这期内容当中小编将会给大家带来有关怎么在Java中使用Struts2上传图片,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
创建视图文件
让我们开始创建需要浏览和上传选定的文件的视图。因此,让我们创建一个带有简单的 HTML 上传表单的 index.jsp,它允许用户上传文件:(表单的编码类型设置为multipart/form-data)
<%--
Created by IntelliJ IDEA.
User: yzjxiaoyue
Date: 2017/7/28
Time: 19:11
To change this template use File | Settings | File Templates.
--%>
<%@ 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>
<title>File Upload</title>
</head>
<body>
<form action="upload" method="post" enctype="multipart/form-data">
<label for="myFile">Upload your file</label>
<input type="file" name="myFile" id="myFile"/>
<input type="submit" value="Upload"/>
</form>
</body>
</html>
之后创建success.jsp页面:
<%--
Created by IntelliJ IDEA.
User: yzjxiaoyue
Date: 2017/7/28
Time: 19:14
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>File Upload Success</title>
</head>
<body>
You have successfully uploaded <s:property value="myFileFileName"/>
</body>
</html>
创建error.jsp页面
<%--
Created by IntelliJ IDEA.
User: yzjxiaoyue
Date: 2017/7/28
Time: 20:05
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>File Upload Error</title>
</head>
<body>
There has been an error in uploading the file.
</body>
</html>
创建 action 类
接下来让我们创建一个称为 uploadFile.java 的 Java 类,它负责上传文件,并且把这个文件存储在一个安全的位置:
package com.action;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.IOException;
public class uploadFile extends ActionSupport{
private File myFile;
public File getMyFile() {
return myFile;
}
public void setMyFile(File myFile) {
this.myFile = myFile;
}
private String myFileContentType;
private String myFileFileName;
private String destPath;
public String execute()
{
/* Copy file to a safe location */
destPath = "E:\\Program Files\\apache-tomcat-9.0.0\\apache-tomcat-9.0.0.M22\\work\\";
try{
System.out.println("Src File name: " + myFile);
System.out.println("Dst File name: " + myFileFileName);
File destFile = new File(destPath, myFileFileName);
FileUtils.copyFile(myFile, destFile);
}catch(IOException e){
e.printStackTrace();
return ERROR;
}
return SUCCESS;
}
public String getMyFileContentType() {
return myFileContentType;
}
public void setMyFileContentType(String myFileContentType) {
this.myFileContentType = myFileContentType;
}
public String getMyFileFileName() {
return myFileFileName;
}
public void setMyFileFileName(String myFileFileName) {
this.myFileFileName = myFileFileName;
}
}
配置文件
<?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.devMode" value="true"/>
<constant name="struts.multipart.maxSize" value="10000000"/>
<constant name="struts.multipart.saveDir" value="/tmp"/>
<constant name="struts.custom.i18n.resources" value="struts"></constant>
<package name="default" namespace="/" extends="struts-default">
<action name="upload" class="com.action.uploadFile">
<!--<interceptor-ref name="basicStack"/>-->
<interceptor-ref name="defaultStack"/>
<interceptor-ref name="fileUpload">
<param name="allowedTypes">image/jpeg,image/jpg,image/gif</param>
</interceptor-ref>
<result name="success">/success.jsp</result>
<result name="error">/error.jsp</result>
</action>
</package>
</struts>
Java是一门面向对象编程语言,可以编写桌面应用程序、Web应用程序、分布式系统和嵌入式系统应用程序。
上述就是小编为大家分享的怎么在Java中使用Struts2上传图片了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注亿速云行业资讯频道。
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