jQuery Uploadify + Apache Fileupload异步上传文件示例
1、可以限制上传文件大小和类型,理论上任何类型的文件都可以上传(自己根据api配置即可);
2、后台使用Apache commons-fileupload-1.3.1.jar作为上传工具包,本示例支持一次性多文件上传;
3、文件上传目录可以任意指定,请在web.xml中配置;
Uploadify api 详见http://www.uploadify.com/documentation/
FileUploadServlet
复制代码 代码如下:
package com.xiaoxing.upload;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.UUID;
import javax.servlet.ServletException;
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.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class FileUploadServlet extends HttpServlet {
private static final long serialVersionUID = 7579265950932321867L;
// 设置文件默认上传目录(如果你没有在web.xml中配置的话)
private String uploadDir = "c:/"; // 文件上传目录
private String tempUploadDir = "c:/"; // 文件临时存放目录(会话销毁后由监听器自动删除)
@Override
public void init() throws ServletException {
// 获取本项目所在真实硬盘目录
String path = getClass().getProtectionDomain().getCodeSource().getLocation().getPath();
path = path.substring(0, path.indexOf("WEB-INF"));
// 判断目标是否存在,不存在就建立
String uploadDir = path.concat(this.getInitParameter("uploadDir"));
String tempUploadDir = path.concat(this.getInitParameter("tempUploadDir"));
File f_uploadDir = new File(uploadDir);
File f_tempUploadDir = new File(tempUploadDir);
if (!f_uploadDir.exists()) {
f_uploadDir.mkdirs();
}
if (!f_tempUploadDir.exists()) {
f_tempUploadDir.mkdirs();
}
// 给变量赋值
this.uploadDir = uploadDir;
this.tempUploadDir = tempUploadDir;
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.setResponse(response);
PrintWriter out = response.getWriter();
out.print("{"error":"-1""); // 非法提交方式
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.setResponse(response); // 设置响应类型,以便前端解析
PrintWriter out = response.getWriter();
String result = "";
try {
// 检查本次是否一个文件上传请求
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if (isMultipart) {
DiskFileItemFactory factory = new DiskFileItemFactory(); // 创建一个工厂基于磁盘的文件项
factory.setRepository(new File(tempUploadDir)); // 配置储存库(确保安全的临时位置时)
ServletFileUpload upload = new ServletFileUpload(factory); // 创建一个新的文件上传处理程序
upload.setSizeMax(1024 * 1024 * 100); // 设置总体要求尺寸限制(建议前后台分别设置,因为前后台用到了不同的插件)
List
Iterator
while (iter.hasNext()) { //如果是一次性上传多个文件,那这里会分别去保存
FileItem item = iter.next();
if (!item.isFormField()) { // 过滤表单里的非文件类型字段
if (!"".equals(item.getName())) { // 过滤非文件类型的input
String s_name = item.getName(); // 获得原始文件名
int position = s_name.lastIndexOf(".");
String s_fileType = s_name.substring(position, s_name.length()); // 获得文件后缀
String date = new SimpleDateFormat("yyyyMMdd").format(new Date());
String s = uploadDir.concat("/").concat(date).concat("/");
//这里按日期分目录保存文件
File sf = new File(s);
if (!sf.exists()) {
sf.mkdirs();
}
String s_filePath = s.concat(UUID.randomUUID().toString()).concat(s_fileType);
File path = new File(s_filePath);
item.write(path);
result += s_filePath.concat(",");
} else {
result = "";
break;
}
}
}
} else {
result = "";
}
String s_resultJSON = this.jointJSON(result); // 拼接返回前端JSON
out.print(s_resultJSON);
} catch (Exception e) {
e.printStackTrace();
} finally {
out.flush();
out.close();
}
}
private String jointJSON (String result) throws UnsupportedEncodingException {
String str = "";
if(!"".equals(result)) {
String rs[] = result.split(",");
StringBuffer buffer = new StringBuffer("{"rows":[");
for (int i = 0; i < rs.length; i++) {
String s_tmpName = rs[i];
s_tmpName = s_tmpName.substring(uploadDir.length(), s_tmpName.length());
buffer.append("{"name":"").append(s_tmpName).append(""},");
}
str = buffer.toString();
str = str.substring(0, str.length() - 1).concat("]}");
} else {
str = "{"error":"-2""; //上传失败
}
return str;
}
private void setResponse(HttpServletResponse response) {
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json;charset=UTF-8");
response.setHeader("cache-control", "no-cache");
}
}
test_upload.html
复制代码 代码如下:
jQuery Uploadify + Apache Fileupload异步上传文件示例(2014-5-3)
1、可以限制上传文件大小和类型,理论上任何类型的文件都可以上传(自己根据api配置即可);
2、后台使用Apache commons-fileupload-1.3.1.jar作为上传工具包,本示例支持一次性多文件上传;
3、文件上传目录可以任意指定,请在web.xml中配置;
4、对于已经上传的图片没有查询到这个页面上,这部分留给你去做吧。
Uploadify api 详见http://www.uploadify.com/documentation/
*如果你对本示例感兴趣并想了解更多,欢迎加入Java私塾在线学习社区(329232140)。
web.xml
复制代码 代码如下:



