Struts2 (三) 文件上传下载

package com.etop.struts2.form.file;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.InputStream;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import java.util.List;import java.util.Map;import org.apache.struts2.convention.annotation.Action;import org.apache.struts2.convention.annotation.InterceptorRef;import org.apache.struts2.convention.annotation.Namespace;import org.apache.struts2.convention.annotation.ParentPackage;import org.apache.struts2.convention.annotation.Result;import com.opensymphony.xwork2.ActionSupport;/** * 类名不能使用FormAction 使用FormAction永远只会调用execute方法 * @author teacher * */@Namespace("/file")@ParentPackage("commonPackage")public class FileFormAction extends ActionSupport{   //文件上传的名称 接受上传文件使用使用File对象   private File usrFile;   //文件上传的迷你类型 字段名ContentType   private String usrFileContentType;   //文件上传的文件名 字段名FileName   private String usrFileFileName;   //文件上传的名称 接受上传文件使用使用File对象   private File usrFile1;   //文件上传的迷你类型 字段名ContentType   private String usrFile1ContentType;   //文件上传的文件名 字段名FileName   /**    * 如果定义类多个文件上传的约束 大小取最小    */   private String usrFile1FileName;   @Action(value="/fileUpload",results={           @Result(name="success",type="dispatcher",location="/file/form.jsp"),           @Result(name="input",type="dispatcher",location="/file/form.jsp")   },interceptorRefs={           @InterceptorRef(value="commonStack"),           @InterceptorRef(value="fileUpload",params={                   "maximumSize","10240",                   "allowedTypes","image/jpeg"           })   })   public String formSubmit(){        Map<String, List<String>> ff=getFieldErrors();       if(ff.containsKey("usrFile")){           return "input";       }       return "success";   }   public InputStream getInputStream() throws FileNotFoundException{       return new FileInputStream("D:/快捷键的作用.txt");   }   public String getFileName() throws UnsupportedEncodingException{       return URLEncoder.encode("快捷键的作用.txt","UTF-8");   }   /**    * 返回的类型为stream 代表文件下载      * 其中inputName代表的名字 表示要调用get方法获取文件刘    * contentType 用于指定下载文件的mini类型    * contentDisposition 告诉浏览器是文件下载 并且指定下载的文件名    * 由于直接写入中文出现乱码 所以通过表达式调用方法进行名称的编码    * @return    */   @Action(value="/fileDownload",results={           @Result(name="success",type="stream",               params={                       "inputName","inputStream",                   "contentType","text/plain",                   "contentDisposition","attachment;filename=${fileName}"               }                   ),   })   public String formDownload(){        return "success";   }   public File getUsrFile() {       return usrFile;   }   public void setUsrFile(File usrFile) {       this.usrFile = usrFile;   }   public String getUsrFileContentType() {       return usrFileContentType;   }   public void setUsrFileContentType(String usrFileContentType) {       this.usrFileContentType = usrFileContentType;   }   public String getUsrFileFileName() {       return usrFileFileName;   }   public void setUsrFileFileName(String usrFileFileName) {       this.usrFileFileName = usrFileFileName;   }   public File getUsrFile1() {       return usrFile1;   }   public void setUsrFile1(File usrFile1) {       this.usrFile1 = usrFile1;   }   public String getUsrFile1ContentType() {       return usrFile1ContentType;   }   public void setUsrFile1ContentType(String usrFile1ContentType) {       this.usrFile1ContentType = usrFile1ContentType;   }   public String getUsrFile1FileName() {       return usrFile1FileName;   }   public void setUsrFile1FileName(String usrFile1FileName) {       this.usrFile1FileName = usrFile1FileName;   }}