java发送HTTP GET POST请求

１、发送源码
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;



/**
* 通过HTTP上传文件
* @author [e-mail]
* @create 2008-4-14
*/

public class PostUrl {

    HttpURLConnection conn = null;
    BufferedWriter bWriter = null;
    OutputStream os = null;
    OutputStreamWriter osw = null;
    FileReader fr = null;
    BufferedReader br = null;
    String str = "";
    char c = '\n';
    String filename = "d:/shchinamobile.log";

   

    /**
     * 通过HTTP协议以POST形式发送指定文件至指定url
     * @param url
     * @throws IOException
     */
    public void sendPost(String url) {
       
        try {
            File f = new File(filename);
           
            URL url1 = new URL(url);
            conn = (HttpURLConnection)url1.openConnection();
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setUseCaches( false);
            conn.setDoOutput(true);
            osw = new OutputStreamWriter(conn.getOutputStream());
            fr = new FileReader(f);
            br = new BufferedReader(fr);
            while((str = br.readLine()) != null) {
                osw.write(str);
                osw.write(c);
            }
            osw.flush() ;
            osw.close() ;
           
            if (conn.getResponseCode() != HttpURLConnection.HTTP_OK)
                System.out.println( "connect failed!");
        } catch (IOException e) {
            e.printStackTrace(System.out);
        }
        finally
        {
            if (osw != null)
                try {
                    osw.close() ;
                } catch (IOException e1) {
                    e1.printStackTrace(System.out);
                }
           
            if (conn != null)
                conn.disconnect() ;
        }
    }   

    public static void main(String[] args) {
        PostUrl pu = new PostUrl();
        try {
            pu.sendPost("http://127.0.0.1:8080/testjava/testp.jsp");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
２、接收JSP
<%
     System.err.println("This a struts page.");
    
         //接收上传的文件内容的临时文件的文件名
        String tempFileName=new String("tempFileName1");
        //tempFile1对象指向这个临时文件
        File tempFile1=new File("D:/",tempFileName);
        //outputFile1文件输出流指向这个临时文件
        FileOutputStream outputFile1=new FileOutputStream(tempFile1);
        //得到客户端提交的所有数据
        InputStream fileSource1=request.getInputStream();
        //将得到的客户端的数据写入临时文件
        byte b[]=new byte[1000];
        int n;
        while((n=fileSource1.read(b))!=-1)
            outputFile1.write(b,0,n);
        //关闭输出流和输入流
        outputFile1.close();
        fileSource1.close();
     
     %>

已测试通过

还可以通HttpClient来发送，请参照：http://www.blogjava.net/willpower88/archive/2008/04/14/192679.html