import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
public class t {
public static void main(String[] args) throws IOException {
URL postUrl = new URL("http://localhost:8080/test_client/callback.action");
HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setUseCaches(false);
connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
String content = "fileInfo="+URLEncoder.encode("file1", "utf-8")+"¶m="+URLEncoder.encode("pppp","utf-8");//多个参数中间用&连接
out.writeBytes(content);
out.flush();
out.close(); // flush and close
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
System.out.println(" ============================= ");
System.out.println(" Contents of post request ");
System.out.println(" ============================= ");
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
System.out.println(" ============================= ");
System.out.println(" Contents of post request ends ");
System.out.println(" ============================= ");
reader.close();
}
}
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.RandomAccessFile;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import com.lubansoft.test.upload.po.UploadRecord;
public class TestClient {
public static void main(String[] args) {
TestClient client = new TestClient();
client.upload();
}
private void upload() {
try {
String boundary = "------WebKitFormBoundaryUey8ljRiiZqhZHBu";
String url = "http://localhost:8080/upload/FileUpLoad";
URL u = new URL(url);
HttpURLConnection conn = (HttpURLConnection) u.openConnection();
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("Charsert", "UTF-8");
conn.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
// 指定流的大小,当内容达到这个值的时候就把流输出
conn.setChunkedStreamingMode(10240);
OutputStream out = new DataOutputStream(conn.getOutputStream());
byte[] end_data = ("\r\n--" + boundary + "--\r\n").getBytes();// 定义最后数据分隔线
List list = new ArrayList();
list.add("e:/userInfo.properties");
list.add("e:/email.html");
StringBuilder sb = new StringBuilder();
//添加form属性
sb.append("--");
sb.append(boundary);
sb.append("\r\n");
sb.append("Content-Disposition: form-data; name=\"username\"");
sb.append("\r\n\r\n");
sb.append("hello word");
out.write(sb.toString().getBytes("utf-8"));
out.write("\r\n".getBytes("utf-8"));
int leng = list.size();
for (int i = 0; i < leng; i++) {
String fname = list.get(i);
File file = new File(fname);
sb = new StringBuilder();
sb.append("--");
sb.append(boundary);
sb.append("\r\n");
sb.append("Content-Disposition: form-data;name=\"file" + i
+ "\";filename=\"" + file.getName() + "\"\r\n");
sb.append("Content-Type:application/octet-stream\r\n\r\n");
byte[] data = sb.toString().getBytes();
out.write(data);
DataInputStream in = new DataInputStream(new FileInputStream(
file));
int bytes = 0;
byte[] bufferOut = new byte[1024];
while ((bytes = in.read(bufferOut)) != -1) {
out.write(bufferOut, 0, bytes);
}
out.write("\r\n".getBytes()); // 多个文件时,二个文件之间加入这个
in.close();
}
out.write(end_data);
out.flush();
out.close();
// 定义BufferedReader输入流来读取URL的响应
BufferedReader reader = new BufferedReader(new InputStreamReader(
conn.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
} catch (Exception e) {
System.out.println("发送POST请求出现异常!" + e);
e.printStackTrace();
}
}
}
服务器端:
package com.lubansoft.test.upload.web.servlet;
import java.io.*;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
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;
/**
*
* @author Administrator
* 文件上传
* 具体步骤:
* 1)获得磁盘文件条目工厂 DiskFileItemFactory 要导包
* 2) 利用 request 获取 真实路径 ,供临时文件存储,和 最终文件存储 ,这两个存储位置可不同,也可相同
* 3)对 DiskFileItemFactory 对象设置一些 属性
* 4)高水平的API文件上传处理 ServletFileUpload upload = new ServletFileUpload(factory);
* 目的是调用 parseRequest(request)方法 获得 FileItem 集合list ,
*
* 5)在 FileItem 对象中 获取信息, 遍历, 判断 表单提交过来的信息 是否是 普通文本信息 另做处理
* 6)
* 第一种. 用第三方 提供的 item.write( new File(path,filename) ); 直接写到磁盘上
* 第二种. 手动处理
*
*/
public class FileUpLoad extends HttpServlet {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8"); //设置编码
//获得磁盘文件条目工厂
DiskFileItemFactory factory = new DiskFileItemFactory();
//获取文件需要上传到的路径
HttpSession session = request.getSession();
String path = session.getServletContext().getRealPath("/uploadFiles");
//如果没以下两行设置的话,上传大的 文件 会占用 很多内存,
//设置暂时存放的 存储室 , 这个存储室,可以和 最终存储文件 的目录不同
/**
* 原理 它是先存到 暂时存储室,然后在真正写到 对应目录的硬盘上,
* 按理来说 当上传一个文件时,其实是上传了两份,第一个是以 .tem 格式的
* 然后再将其真正写到 对应目录的硬盘上
*/
factory.setRepository(new File(path));
//设置 缓存的大小,当上传文件的容量超过该缓存时,直接放到 暂时存储室
factory.setSizeThreshold(1024*1024) ;
//高水平的API文件上传处理
ServletFileUpload upload = new ServletFileUpload(factory);
try {
//可以上传多个文件
List list = (List)upload.parseRequest(request);
for(FileItem item : list)
{
//获取表单的属性名字
String name = item.getFieldName();
//如果获取的 表单信息是普通的 文本 信息
if(item.isFormField())
{
//获取用户具体输入的字符串 ,名字起得挺好,因为表单提交过来的是 字符串类型的
String value = item.getString() ;
request.setAttribute(name, value);
}
//对传入的非 简单的字符串进行处理 ,比如说二进制的 图片,电影这些
else
{
/**
* 以下三步,主要获取 上传文件的名字
*/
//获取路径名
String value = item.getName() ;
if(value == null || value.equals("")){
continue;
}
//索引到最后一个反斜杠
int start = value.lastIndexOf("\\");
//截取 上传文件的 字符串名字,加1是 去掉反斜杠,
String filename = value.substring(start+1);
request.setAttribute(name, filename);
//真正写到磁盘上
//它抛出的异常 用exception 捕捉
//item.write( new File(path,filename) );//第三方提供的
//手动写的
OutputStream out = new FileOutputStream(new File(path,filename));
InputStream in = item.getInputStream() ;
int length = 0 ;
byte [] buf = new byte[1024] ;
System.out.println("获取上传文件的总共的容量:"+item.getSize());
// in.read(buf) 每次读到的数据存放在 buf 数组中
while( (length = in.read(buf) ) != -1)
{
//在 buf 数组中 取出数据 写到 (输出流)磁盘上
out.write(buf, 0, length);
}
in.close();
out.close();
}
}
} catch (FileUploadException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
request.getRequestDispatcher("fileDemo.jsp").forward(request, response);
}
}
Java中利用HttpURLConnection发送post和get请求
Servlet实现文件上传,可多文件上传