Struts2上传多个文件,下载

jopen 5年前

页面代码:

注意,我在页面在一个新建的文件夹下(TheNameSpace)

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>  <%@ taglib prefix="s" uri="/struts-tags" %>  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  <html>    <head>      <title>My JSP 'uplod.jsp' starting page</title>    </head>    <body>    <h1>file upload</h1>    <s:form action="uploadList.action" enctype="multipart/form-data" theme="simple">    <table cellpadding="0"  height="5" >      <tr>    <td>用户:</td>    <td>    <s:textfield name="username"/>    </td>    </tr>        <tr>    <td>密码:</td>   <td> <s:password name="passwrod"/></td>     </tr>     <tr >     <td>文件:</td>     <td id="fileID">     <s:fielderror name="file"/>    <s:file name="file" />    <a href="javascript:addFiles()" >添加上传</a>    </td>    </tr>        <tr>    <td colspan="2">    <s:submit value="提交"/>    <s:reset value="重置"/>      </td>    </tr>     </table>    </s:form>    <script language="javascript">      function addFiles(){            var tdID=document.getElementById("fileID");            var br=document.createElement("br");      var file=document.createElement("input");      var button=document.createElement("input");                 file.type="file";      file.name="file";            button.type="button";      button.value="remove";      button.onclick=function(){      tdID.removeChild(br);      tdID.removeChild(file);      tdID.removeChild(button);      }                       tdID.appendChild(br);      tdID.appendChild(file);      tdID.appendChild(button);      }               </script>    </body>  </html>

struts.xml配制文件:

<?xml version="1.0" encoding="UTF-8"?>   <!DOCTYPE struts PUBLIC   "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"   "http://struts.apache.org/dtds/struts-2.3.dtd">      <struts>   <!-- 常量 上传文件 最大大小 -->   <constant name="struts.multipart.maxSize" value="20971520"/>      <!-- 包括这个xml -->   <include file="strtus_1.xml"/>      <!-- 后台action  -->   <package name="back" extends="struts-default" namespace="/TheNameSpace">      <action name="logins" class="com.rui.struts2.SpaceLogin">   <result name="success">showUser.jsp</result>   </action>      <action name="uploadList" class="com.rui.struts.UploadList">   <result name="success">ok.jsp</result>    <result name="input">/${pageContext.request.contextPath}/TheNameSpace/uploadList.jsp</result>      <!--拦截上上传文件的 大小、格式  -->   <interceptor-ref name="fileUpload">   <param name="setAllowedTypes">image/pjpeg,image/gif,image/bmp,image/jpeg,image/jpg, text/plain, application/java-archive</param>   <param name="maximumSize">524288</param>   </interceptor-ref>       <interceptor-ref name="basicStack"/>   </action>      <action name="upload" class="com.rui.struts.Upload">   <result name="success">ok.jsp</result>   <result name="input">upload.jsp</result>   </action>      <action name="download" class="com.rui.struts.DownLoald">   <result  type="stream">   <!-- 要下载的文件    <param name="contentDisposition">attachment;filename="bbbb.txt"</param>   -->   <!-- 自动寻找方法 -->   <param name="inputName">downloadFile</param>   </result>      </action>   <action name="showlist" class="com.rui.struts.ShowFileList">   <result>download.jsp</result>   </action>      </package>           </struts>

action 上传类的代码:

package com.rui.struts;    import java.io.File;  import java.io.FileInputStream;  import java.io.FileOutputStream;  import java.io.InputStream;  import java.io.OutputStream;  import java.util.List;    import org.apache.struts2.ServletActionContext;    import com.opensymphony.xwork2.ActionSupport;    public class UploadList extends ActionSupport {   private String username;   private String passwrod;   private List<File> file;   private List<String> fileFileName;   private List<String> fileContentType;            public String getUsername() {    return username;   }   public void setUsername(String username) {    this.username = username;   }   public String getPasswrod() {    return passwrod;   }   public void setPasswrod(String passwrod) {    this.passwrod = passwrod;   }   public List<File> getFile() {    return file;   }   public void setFile(List<File> file) {    this.file = file;   }   public List<String> getFileFileName() {    return fileFileName;   }   public void setFileFileName(List<String> fileFileName) {    this.fileFileName = fileFileName;   }   public List<String> getFileContentType() {    return fileContentType;   }   public void setFileContentType(List<String> fileContentType) {    this.fileContentType = fileContentType;   }      @Override   public void validate() {    System.out.println("执行了验证器...");    if(null==file){     addFieldError("file", "请选择文件!");    }   }         @Override   public String execute() throws Exception {    if(null==file||file.size()<=0){     addFieldError("file", "请上传符合格式的文件....");     return INPUT;    }   //获得路么   String path=ServletActionContext.getRequest().getRealPath("upload");      for(int i=0;i<file.size();i++){   //输入流   InputStream is=new FileInputStream(file.get(i));      //File 对象   File fileObj=new File(path,fileFileName.get(i));       //输出流   OutputStream os=new FileOutputStream(fileObj);      byte [] by=new byte[400];   int length=0;   while(-1!=(length=is.read(by))){    os.write(by,0,length);   }      os.close();   is.close();        }          return SUCCESS;   }       }

 

下载页面测试 :

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>  <%@ taglib prefix="s" uri="/struts-tags" %>  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  <html>    <head>      <title>My JSP 'download.jsp' starting page</title>    </head>    <body>        <s:iterator value="listName" var="lname">    <s:property value="lname"/><br/><br/>     <a href="download.action?lname=<s:property value='#lname'/>" >下载文件<a>    <!--     <a href="download.action?lname=DWHJ_062001.jpg">下载文件</a>     -->    </s:iterator>        <br/><br/>            </body>  </html>


 

action 下载代码:

package com.rui.struts;    import java.io.InputStream;  import java.io.UnsupportedEncodingException;    import javax.servlet.http.HttpServletRequest;  import javax.servlet.http.HttpServletResponse;    import org.apache.struts2.ServletActionContext;    import com.opensymphony.xwork2.ActionSupport;    public class DownLoald extends ActionSupport {      private String lname;      public String getLname() {    return lname;   }       public void setLname(String lname) {    this.lname = lname;   }     private String slname="" ;      public InputStream getDownloadFile(){      HttpServletResponse response=ServletActionContext.getResponse();   try {    slname=new String(lname.getBytes("ISO-8859-1"),"UTF-8");   } catch (UnsupportedEncodingException e1) {    // TODO Auto-generated catch block    e1.printStackTrace();   }            try {    lname=java.net.URLEncoder.encode(slname,"utf-8");   } catch (UnsupportedEncodingException e) {    // TODO Auto-generated catch block    e.printStackTrace();   }           System.out.println("ddd"+lname);   response.setHeader("Content-Disposition","attachment;filename="+lname);        return ServletActionContext.getServletContext().    getResourceAsStream("upload/"+slname);   }        //文件名如果有中文的话要进行uri中文转码     /*String encodFileNmae="";     try {       encodFileNmae=java.net.URLEncoder.encode(u.getOldname(),"utf-8");     } catch (UnsupportedEncodingException e1) {      // TODO Auto-generated catch block      e1.printStackTrace();     }          //设置一个请求头告诉浏览器有文件要下载     response.setContentType("text/html;charset=utf-8");       response.setHeader("Content-Disposition","attachment;filename="+encodFileNmae);   */         @Override   public String execute() throws Exception {        return SUCCESS;   }    }

d1.jpg

d2.jpgd3.jpgd4.jpg

d5.jpg

来自:http://blog.csdn.net/liangrui1988/article/details/9375099