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java Struts2框架下實(shí)現(xiàn)文件上傳功能

 更新時(shí)間:2016年10月21日 08:52:56   作者:昵稱不好起啊  
這篇文章主要為大家詳細(xì)介紹了java Struts2框架下實(shí)現(xiàn)文件上傳功能,具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了Struts2框架實(shí)現(xiàn)文件上傳的方法,供大家參考,具體內(nèi)容如下

struts2的配置過程

(1)在項(xiàng)目中加入jar包

 

 

(2)web.xml中filter(過濾器)的配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
  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_2_5.xsd">
 <display-name></display-name>
  <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>
 

(3)struts.xml配置文件的編寫

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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_2_5.xsd">
<display-name></display-name>
<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>

(4)action類的編寫

package com.xmgc.sc.action;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
 
 
import org.apache.struts2.ServletActionContext;
 
public class MyUpLoadAction {
 
  private String title;
  private File upload;//與form表單中的file文件類型的名字是一樣的
  private String uploadContentType;//前綴必須要是上面的upload
  private String uploadFileName;
   
 
  public String getTitle() {
    return title;
  }
 
  public void setTitle(String title) {
    this.title = title;
  }
 
  public File getUpload() {
    return upload;
  }
 
  public void setUpload(File upload) {
    this.upload = upload;
  }
 
  public String getUploadContentType() {
    return uploadContentType;
  }
 
  public void setUploadContentType(String uploadContentType) {
    this.uploadContentType = uploadContentType;
  }
 
  public String getUploadFileName() {
    return uploadFileName;
  }
 
  public void setUploadFileName(String uploadFileName) {
    this.uploadFileName = uploadFileName;
  }
 
/* public String getSavePath() {
    //ServletContext cxt=ServletActionContext.getServletContext();
    //String path=cxt.getRealPath("/");
    //這個(gè)獲取的path為:http://localhost:8080/sc   
    //上傳以后變?yōu)镋:\software\apache-tomcat-6.0.45\webapps\sc
     
     
    return savePath;
     
  }
 
  public void setSavePath(String savePath) {
    //E:\software\apache-tomcat-6.0.45\webapps\sc/myupload
    this.savePath = ServletActionContext.getServletContext().getRealPath("/myupload");
  }*/
   
   
  public String execute() throws IOException{
     
    System.out.println(title);//標(biāo)題
    System.out.println(uploadContentType);//準(zhǔn)備上傳的文件的文件類型
    System.out.println(uploadFileName);//準(zhǔn)備上傳的文件的文件名,記住還有擴(kuò)展名
    System.out.println(upload);
     
    String realPath=ServletActionContext.getServletContext().getRealPath("/");
     
    String path=realPath+"myupload/"+uploadFileName;
     
    System.out.println(realPath);
    System.out.println(path);
     
    FileInputStream fis=new FileInputStream(upload);
    FileOutputStream fos=new FileOutputStream(path);
     
    byte[] bytes=new byte[1024];//定義一個(gè)1024大小的字節(jié)數(shù)組
    int len=-1;//用來做標(biāo)志位
     
     
    while((len=fis.read(bytes))>0){
      fos.write(bytes, 0, len);
    }
     
    return null;
  }
}

 (5)JSP頁面的編寫

<%@ page contentType="text/html;charset=utf-8"%>
 
<!-- enctype="multipart/form-data",這個(gè)是最重要的配置 -->
<form action="myupload.action" enctype="multipart/form-data" method="post">
   文件名:<input type="text" name="title"/><br/>
     上傳:<input type="file" name="upload"/><br/>
    <input type="submit" value="上傳"/>
</form>
  

經(jīng)過這次總結(jié),感覺struts2框架下的單文件的上傳還是非常簡單的,只要獲取要存儲在什么地方的地址,再通過輸入輸出流,寫到這個(gè)地址中去就行了。絕大部分工作,struts2已經(jīng)幫我們做好了。

以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。

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