java Struts2框架下完成文件上傳功效

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本文實例為年夜家分享了Struts2框架完成文件上傳的辦法，供年夜家參考，詳細內容以下

struts2的設置裝備擺設進程

（1）在項目中參加jar包

（2）web.xml中filter（過濾器）的設置裝備擺設

<?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設置裝備擺設文件的編寫

<?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;//前綴必需如果下面的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("/");
    //這個獲得的path為：http://localhost:8080/sc   
    //上傳今後變成E:\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);//題目
    System.out.println(uploadContentType);//預備上傳的文件的文件類型
    System.out.println(uploadFileName);//預備上傳的文件的文件名,記住還有擴大名
    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];//界說一個1024年夜小的字節數組
    int len=-1;//用來做標記位
     
     
    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",這個是最主要的設置裝備擺設 -->
<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>

經由此次總結，感到struts2框架下的單文件的上傳照樣異常簡略的，只需獲得要存儲在甚麼處所的地址，再經由過程輸出輸入流，寫到這個地址中去就好了。絕年夜部門任務，struts2曾經幫我們做好了。

以上就是本文的全體內容，願望對年夜家的進修有所贊助，也願望年夜家多多支撐。