Android文件图片上传的详细讲解（四）---服务端编码

来源：互联网发布：《大数据时代》pdf 编辑：程序博客网时间：2024/05/17 06:11

服务端上传采用commons-fileupload上传相关的文件。

Java代码

package com.easyway.fileupload;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
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.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
/**
* 文件上传的Serlvet类
*
* Servlet implementation class FileImageUploadServlet
*
* 此处的文件上传比较简单没有处理各种验证，文件处理的错误等。
* 如果需要处理，请修改源代码即可。
* @Title:
* @Description: 实现TODO
* @Company:易程科技股份有限公司
* @Date:2012-7-22
* @author longgangbai
* @version 1.0
*/
public class FileImageUploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private ServletFileUpload upload;
private final long MAXSize = 4194304*2L;//4*2MB
private String filedir=null;
/**
* @see HttpServlet#HttpServlet()
*/
public FileImageUploadServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* 设置文件上传的初始化信息
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
FileItemFactory factory = new DiskFileItemFactory();// Create a factory for disk-based file items
this.upload = new ServletFileUpload(factory);// Create a new file upload handler
this.upload.setSizeMax(this.MAXSize);// Set overall request size constraint 4194304
filedir=config.getServletContext().getRealPath("images");
System.out.println("filedir="+filedir);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
@SuppressWarnings("unchecked")
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
PrintWriter out=response.getWriter();
try {
List<FileItem> items = this.upload.parseRequest(request);
if(items!=null && !items.isEmpty()){
for (FileItem fileItem : items) {
String filename=fileItem.getName();
String filepath=filedir+File.separator+filename;
System.out.println("文件保存路径为:"+filepath);
File file=new File(filepath);
InputStream inputSteam=fileItem.getInputStream();
BufferedInputStream fis=new BufferedInputStream(inputSteam);
FileOutputStream fos=new FileOutputStream(file);
int f;
while((f=fis.read())!=-1)
{
fos.write(f);
}
fos.flush();
fos.close();
fis.close();
inputSteam.close();
System.out.println("文件："+filename+"上传成功!");
}
}
System.out.println("上传文件成功!");
out.write("上传文件成功!");
} catch (FileUploadException e) {
e.printStackTrace();
out.write("上传文件失败:"+e.getMessage());
}
}
}

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