您的位置：首页 > 编程语言 > Java开发

Struts2-上传/下载文件功能实现

2016-10-23 19:09 666 查看

上传文件

项目：

（1）web.xml文件配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>Struts2-test-7-FileDown</display-name>
<filter>
<filter-name>Struts2-test-7-FileDown</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>

<filter-mapping>
<filter-name>Struts2-test-7-FileDown</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

（2）选择上传文件界面

FileUpload.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>文件上传</title>
</head>
<body>
<form action="Upload.action" method="post" enctype="multipart/form-data">
file:<input type="file" name="file"><br/>
<input type="submit" value="上传">
</form>
</body>
</html>

（3）Action文件实现具体功能

UploadAction.java

/*
*@Author swxctx
*@time 2016年9月9日
*/
package com.sw.struts2;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;

import org.apache.commons.fileupload.servlet.ServletRequestContext;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction2 extends ActionSupport {
//实现多文件上传
private String username;
private List<File> file;//file需要与客户端所传文件名一致
private List<String> fileFileName;//文件名
private List<String> fileContType;//类型

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public List<File> getFile() {
return file;
}

public void setFile(List<File> file) {
this.file = file;
}

public List<String> getFileFileName() {
return fileFileName;
}

public void setFileFileName(List<String> fileFileName) {
this.fileFileName = fileFileName;
}

public List<String> getFileContType() {
return fileContType;
}

public void setFileContType(List<String> fileContType) {
this.fileContType = fileContType;
}

@Override
public String execute() throws Exception {
// TODO Auto-generated method stub
for(int i=0;i<file.size();i++){
InputStream is=new FileInputStream(file.get(i));
String root=ServletActionContext.getRequest().getRealPath("/upload");
File destFile=new File(root,fileFileName.get(i));

OutputStream os=new FileOutputStream(destFile);
byte[] buffer=new byte[400];
int length=0;

while((length=is.read(buffer))!=-1){
os.write(buffer, 0, length);
}
is.close();
os.close();
}
return "SUCCESS";
}
}

（4）结果页面

FileUploadResult.jap

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s"%>
<!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>result</title>
</head>
<body>
FileName:<s:property value="fileFileName"/><br/>
Type:<s:property value="fileContentType"/><br/>
</body>
</html>

（5）struts.xml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>
<!-- 指定文件上传大小 -->
<constant name="struts.multipart.maxSize" value="1048576000"></constant>
<package name="Struts2-test-7-FileDown" extends="struts-default">
<!-- action配置 -->
<action name="Upload" class="com.sw.file.UploadAction">
<result name="success">/FileUploadResult.jsp</result>
</action>
</package>

</struts>

上传文件实例截图：





下载文件

项目：

（1）web.xml配置文件

（如上配置，其使用同一项目）

（2）下载文件界面

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>文件下载</title>
</head>
<body>
<a href="downloadFile.action">下载文件</a>
</body>
</html>

（3）Action文件下载

DownloadAction.java：

/*
*@Author swxctx
*@time 2016年10月23日
*/
package com.sw.file;

import java.io.InputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class DownloadAction extends ActionSupport {
//文件下载
public InputStream getDownloadFile(){

return ServletActionContext.getServletContext().getResourceAsStream("/upload/Upload.txt");
}

@Override
public String execute() throws Exception {
// TODO Auto-generated method stub

return "success";
}
}

（4）struts.xml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>

<!-- 下载文件action配置 -->
<action name="downloadFile" class="com.sw.file.DownloadAction">
<result type="stream" name="success">
<param name="contentDisposition">attachment;filename="Upload.txt"</param>
<param name="inputName">downloadFile</param>
</result>
</action>
</package>

</struts>

下载文件实例截图：

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 点击这里给我发消息
标签： 
相关文章推荐
新的分享
章节导航