java Struts2框架下实现文件上传功能_java

本文实例为大家分享了Struts2框架实现文件上传的方法，供大家参考，具体内容如下

struts2的配置过程

（1）在项目中加入jar包

（2）web.xml中filter（过滤器）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配置文件的编写

<?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/javaeehttp://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类的编写

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;//与form表单中的file文件类型的名字是一样的  private String uploadContentType;//前缀必须要是上面的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("/");    //这个获取的path为：http://localhost:8080/sc       //上传以后变为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);//标题    System.out.println(uploadContentType);//准备上传的文件的文件类型    System.out.println(uploadFileName);//准备上传的文件的文件名,记住还有扩展名    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];//定义一个1024大小的字节数组    int len=-1;//用来做标志位              while((len=fis.read(bytes))>0){      fos.write(bytes, 0, len);    }         return null;  }}

（5）JSP页面的编写

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

经过这次总结，感觉struts2框架下的单文件的上传还是非常简单的，只要获取要存储在什么地方的地址，再通过输入输出流，写到这个地址中去就行了。绝大部分工作，struts2已经帮我们做好了。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

java Struts2框架下实现文件上传功能_java_