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  • struts2-18-上传多文件

    上传多文件：数组或者集合

         

    一：上传文件的主页面  upload.jsp

    复制代码

    <%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ taglib prefix="s" uri="/struts-tags" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>上传文件主页面</title>
    </head>
    <body>
    <s:fielderror/>
    <form action="uploadAction" method="post" enctype="multipart/form-data">
    <table border="1">
    <caption>上传文件</caption>
    <tr>
    <th>上传标题</th>
    <td><input type="text" name="title"></td>
    </tr>
    <tr>
    <th>选择文件1:</th>
    <td><input type="file" name="upload"></td>
    </tr>
    <tr>
    <th>选择文件2:</th>
    <td><input type="file" name="upload"></td>
    </tr>
    <tr>
    <th>选择文件3:</th>
    <td><input type="file" name="upload"></td>
    </tr>
    <tr>
    <td colspan="2" align="center"><input type="submit" value="上传"></td>
    </tr>
    </table>
    </form>
    </body>
    </html>

    复制代码

    二：跳转到相应的action  nuc.sw.action---uploadAction.java

    package nuc.sw.action;

    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.util.UUID;

    import com.opensymphony.xwork2.ActionSupport;

    public class uploadAction extends ActionSupport {
    private String title;
    private File[] upload;
    private String[] uploadFileName;
    private String[] uploadContentType;
    private String savePath;
    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[] getUploadFileName() {
    return uploadFileName;
    }
    public void setUploadFileName(String[] uploadFileName) {
    this.uploadFileName = uploadFileName;
    }
    public String[] getUploadContentType() {
    return uploadContentType;
    }
    public void setUploadContentType(String[] uploadContentType) {
    this.uploadContentType = uploadContentType;
    }
    public String getSavePath() {
    return savePath;
    }
    public void setSavePath(String savePath) {
    this.savePath = savePath;
    }

    @Override
    public String execute() throws Exception {
    System.out.println(title);
    System.out.println(upload);
    System.out.println(uploadFileName);
    System.out.println(uploadContentType);
    System.out.println(savePath);
    for(int i=0;i<upload.length;i++){
    //输入流
    FileInputStream fis=new FileInputStream(upload[i]);
    //输出流
    //上传两次一样的都会成功且显示两个，所以解决覆盖问题
    FileOutputStream fos=new FileOutputStream(savePath+"/"+UUID.randomUUID().toString()+"_"+uploadFileName[i]);
    //字节为单位上传
    byte[] buffer=new byte[1024];
    //定义长度
    int len=0;
    //从0开始
    while((len=fis.read(buffer))>0){
    fos.write(buffer, 0, len);
    }
    }
    //不能写输入输出流
    return SUCCESS;
    }
    }

       三：配置struts.xml

          1:  对文件的类型 大小进行限制（实现文件过滤）

          2：设置上传的文件的真实路径  即将.tmp文件保存到savepath文件中

         

    复制代码
     1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 4     "http://struts.apache.org/dtds/struts-2.3.dtd">
 5 
 6 <struts>
 7  <constant name="struts.devMode" value="true" />
 8  <!-- 设置文件的临时保存路径 -->
 9  <constant name="struts.multipart.saveDir" value="d:/tmpsaveDir"></constant>
10  <package name="default" namespace="/" extends="struts-default">
11      <action name="uploadAction" class="nuc.sw.action.uploadAction">
12          <!-- 需要去找源码：struts-default.xml中寻找拦截器  再关联源码 -->
13          <interceptor-ref name="fileUpload">
14               <!--设置上传的文件类型 -->
15                 <!-- 隐藏这一属性后，黑客可以随意上传修改后缀名的病毒文件 （实质没有改变）-->
16               <param name="allowedTypes">image/bmp,image/png,image/gif,image/jpeg,image/phpeg,text/plain</param>
17              <!-- 设置上传的文件的大小 -->
18              <param name="maximumSize">65535</param>
19              <!-- 设置上传文件的扩展名 -->
20              <param name="allowedExtensions">.txt</param>
21          </interceptor-ref>
22          <!-- 引用默认拦截器时，需要使用defaultStack -->
23          <interceptor-ref name="defaultStack"/>
24          <!-- 设置保存的真实路径 -->
25          <param name="savePath">d:/uploadRealFile</param>
26          <result name="success">/hello.jsp</result>
27          <result name="input">/upload.jsp</result>
28      </action>
29  </package>
30 </struts>
    复制代码

    四：项目结构

    五：运行结果

     
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  • 原文地址：https://www.cnblogs.com/Z-D-/p/6053530.html
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