java版-JQuery上传插件Uploadify使用实例

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http://bijian1013.iteye.com/blog/1993215
这里写图片描述

maven

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.lzh</groupId>    <artifactId>activitiDemo</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>war</packaging>    <dependencies>        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->        <dependency>             <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>            <scope>provided</scope>        </dependency>        <dependency>            <groupId>org.apache.tomcat</groupId>            <artifactId>tomcat-servlet-api</artifactId>            <version>7.0.62</version>        </dependency>        <dependency>            <groupId>org.apache.commons</groupId>            <artifactId>commons-lang3</artifactId>            <version>3.3.2</version>        </dependency>        <dependency>            <groupId>org.apache.commons</groupId>            <artifactId>commons-io</artifactId>            <version>1.3.2</version>        </dependency>        <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->        <dependency>            <groupId>commons-fileupload</groupId>            <artifactId>commons-fileupload</artifactId>            <version>1.3.1</version>        </dependency>    </dependencies></project>

jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!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>Insert title here</title><link rel="stylesheet" href="/activitiDemo/css/uploadify.css"/><script type="text/javascript" src="/activitiDemo/js/jquery-1.8.3.min.js"></script><script type="text/javascript" src="/activitiDemo/js/swfobject.js"></script><script type="text/javascript" src="/activitiDemo/js/jquery.uploadify.min.js"></script></head><body>    name：<input id="name" name="name">    文件上传： <div id="file_upload"></div>    <button id="btu" onclick="btu()"> 提交</button></body><script>    $(function(){        $("#file_upload").uploadify({            height        : 30,            swf           : './js/uploadify.swf',            uploader      : '/activitiDemo/uploadFile.action',            width         : 120        });    })</script></html>

java

package up;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.util.Iterator;import java.util.List;import java.util.UUID;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.FileUploadException;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;@WebServlet("/uploadFile.action")public class UploadFile extends HttpServlet{     private static final long serialVersionUID = 1L;       private String uploadPath = "D://xxx"; // 上传文件的目录       private File file;      @Override    protected void doPost(HttpServletRequest req, HttpServletResponse resp)            throws ServletException, IOException {            String savePath = req.getContextPath();                 savePath = uploadPath+savePath + "/uploads/";             File f1 = new File(savePath);              System.out.println(savePath);              if (!f1.exists()) {                  f1.mkdirs();              }             DiskFileItemFactory fac = new DiskFileItemFactory();             ServletFileUpload upload = new ServletFileUpload(fac);              upload.setHeaderEncoding("utf-8");             List<FileItem> fileList = null;              try {                  fileList = upload.parseRequest(req);              } catch (FileUploadException ex) {                  return;              }              Iterator<FileItem> it = fileList.iterator();              String name = "";              String extName = "";            while(it.hasNext()){                FileItem item = it.next();                if(!item.isFormField()){                     name = item.getName();                      long size = item.getSize();                       String type = item.getContentType();                      System.out.println(size + " " + type);                       if (name == null || name.trim().equals("")) {                           continue;                       }                     // 扩展名格式：                       if (name.lastIndexOf(".") >= 0) {                           extName = name.substring(name.lastIndexOf("."));                       }                      do {                           // 生成文件名：                           name = UUID.randomUUID().toString();                           file = new File(savePath + name + extName);                       } while (file.exists());                      try {                           item.write(file);                     } catch (Exception e) {                           e.printStackTrace();                       }                 }            }    }    @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp)            throws ServletException, IOException {        // TODO Auto-generated method stub        doPost(req, resp);    }    public String getUploadPath() {        return uploadPath;    }    public void setUploadPath(String uploadPath) {        this.uploadPath = uploadPath;    }}

注意：

这里的核心是，通过前端插件传过来之后，用 org.apache.commons.fileupload包下面的DiskFileItemFactory，ServletFileUpload这个类来实现，通过是不是普通字段的方法item.isFormField()来得到是否是文件，然后有个write的方法，写到指定文件中。

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