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Struts2文件的下载

2024-08-25 06:09:37   220人阅读

1、下载登录页面download.jsp

  1: <%@ page language="java" contentType="text/html; charset=UTF-8"

  2:     pageEncoding="UTF-8"%>

  3: <%@ taglib prefix="s" uri="/struts-tags" %>

  4: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

  5: <html>

  6:   <head>

  7:     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

  8:     <title>下载页面</title>

  9:   </head>

 10:   <body>

 11:     下载前的登录页面

 12:     <s:form action="download1">

 13:       <s:textfield name="user" label="用户名"/>

 14:       <s:textfield name="pass" label="密    码"/>

 15:       <s:submit value="http://www.mamicode.com/下载"/>

 16:     </s:form>

 17:   </body>

 18: </html>

2、FileDownAction.java

  1: package cc.openhome;

  2: 

  3: import java.io.File;

  4: import java.io.FileInputStream;

  5: import java.io.InputStream;

  6: import com.opensymphony.xwork2.Action;

  7: import com.opensymphony.xwork2.ActionSupport;

  8: public class FileDownAction extends ActionSupport implements Action {

  9:   private InputStream fileInputStream;

 10:   private String fileName;

 11:   private String user;

 12:   private String pass;

 13:   

 14:   public String getUser() {

 15:     return user;

 16:   }

 17:   public void setUser(String user) {

 18:     this.user = user;

 19:   }

 20:   public String getPass() {

 21:     return pass;

 22:   }

 23:   public void setPass(String pass) {

 24:     this.pass = pass;

 25:   }

 26:   public InputStream getFileInputStream() {

 27:     return fileInputStream;

 28:   }

 29:   public void setFileInputStream(InputStream fileInputStream) {

 30:     this.fileInputStream = fileInputStream;

 31:   }

 32:   public String getFileName() {

 33:     return fileName;

 34:   }

 35:   public void setFileName(String fileName) {

 36:     this.fileName = fileName;

 37:   }

 38:   @Override

 39:   public String execute() throws Exception {

 40:     // TODO Auto-generated method stub

 41:     if(getUser().equals("nihao") && getPass().equals("nihao")){

 42:       File file = new File("E:/java web/workspace/struts-fileupload/WebContent/images/struts-gif.rar");

 43:       fileName=file.getName();

 44:       fileInputStream=new FileInputStream(file);

 45:       return SUCCESS;

 46:     }else{

 47:       return ERROR;

 48:     }

 49:   }

 50:   public void validate(){

 51:     if(getUser()==null || getUser().trim().equals("")){

 52:       addFieldError("user", getText("user.required"));

 53:     }

 54:     if(getPass()==null || getPass().trim().equals("")){

 55:       addFieldError("pass", getText("pass.required"));

 56:     }

 57:   }

 58:   

 59: }

 60:

3、struts.xml

  1: <?xml version="1.0" encoding="UTF-8" ?>

  2: <!DOCTYPE struts PUBLIC

  3:   "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

  4:   "http://struts.apache.org/dtds/struts-2.3.dtd">

  5: 

  6: <struts>   

  7:   <constant name="struts.custom.i18n.resources" value="http://www.mamicode.com/message"/>

  8:   <package name="struts2" extends="struts-default">

  9:     <action name="download1" class="cc.openhome.FileDownAction">

 10:       <param name="inputPath">\images\struts-gif.rar</param>

 11:       <result name="success" type="stream">

 12:         <param name="contentType">application/octet-stream</param>

 13:         <param name="inputName">fileInputStream</param>

 14:         <param name="contentDisposition">acttachment;filename="${ fileName}"</param>

 15:         <param name="bufferSize">4096</param>

 16:       </result>

 17:       <result name="input">/input.jsp</result>

 18:     </action>

 19:    </package>

 20: </struts>

4、运行结果

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Struts2文件的下载


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