1、多线程工具TreadTestHttp 

package com;

import java.util.concurrent.CountDownLatch;
 
public class TreadTestHttp {
 
    public static void main(String[] args) throws InterruptedException {
        Runnable taskTemp = new Runnable() {
	// 注意,此处是非线程安全的,留坑
            private int iCounter;
 
            @Override
            public void run() {
                for(int i = 0; i < 1; i++) {
                    // 发起请求
                    String r = HttpClientUtil.doGet("http://localhost:9999/fxcrs/test/test");
                    System.out.println("请求结果="+r);
                    iCounter++;
                    System.out.println(System.nanoTime() + " [" + Thread.currentThread().getName() + "] iCounter = " + iCounter);
                    try {
                        Thread.sleep(1);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        };
        TreadTestHttp latchTest = new TreadTestHttp();
        // 模拟同时开7个线程访问
        latchTest.startTaskAllInOnce(7, taskTemp);
    }
    public long startTaskAllInOnce(int threadNums, final Runnable task) throws InterruptedException {
        final CountDownLatch startGate = new CountDownLatch(1);
        final CountDownLatch endGate = new CountDownLatch(threadNums);
        for(int i = 0; i < threadNums; i++) {
            Thread t = new Thread() {
                public void run() {
                    try {
                        // 使线程在此等待,当开始门打开时,一起涌入门中
                        startGate.await();
                        try {
                            task.run();
                        } finally {
                            // 将结束门减1,减到0时,就可以开启结束门了
                            endGate.countDown();
                        }
                    } catch (InterruptedException ie) {
                        ie.printStackTrace();
                    }
                }
            };
            t.start();
        }
        long startTime = System.nanoTime();
        System.out.println(startTime + " [" + Thread.currentThread() + "] All thread is ready, concurrent going...");
        // 因开启门只需一个开关,所以立马就开启开始门
        startGate.countDown();
        // 等等结束门开启
        endGate.await();
        long endTime = System.nanoTime();
        System.out.println(endTime + " [" + Thread.currentThread() + "] All thread is completed.");
        return endTime - startTime;
    }
}

2、get和post请求工具HttpClientUtil

package com;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

class HttpClientUtil {
    public static String doGet(String httpurl) {
        HttpURLConnection connection = null;
        InputStream is = null;
        BufferedReader br = null;
        String result = null;// 返回结果字符串
        try {
            // 创建远程url连接对象
            URL url = new URL(httpurl);
            // 通过远程url连接对象打开一个连接,强转成httpURLConnection类
            connection = (HttpURLConnection) url.openConnection();
            // 设置连接方式:get
            connection.setRequestMethod("GET");
            // 设置连接主机服务器的超时时间:15000毫秒
            connection.setConnectTimeout(15000);
            // 设置读取远程返回的数据时间:60000毫秒
            connection.setReadTimeout(60000);
            // 发送请求
            connection.connect();
            // 通过connection连接,获取输入流
            if (connection.getResponseCode() == 200) {
                is = connection.getInputStream();
                // 封装输入流is,并指定字符集
                br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                // 存放数据
                StringBuffer sbf = new StringBuffer();
                String temp = null;
                while ((temp = br.readLine()) != null) {
                    sbf.append(temp);
                    sbf.append("\r\n");
                }
                result = sbf.toString();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != br) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
 
            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
 
            connection.disconnect();// 关闭远程连接
        }
 
        return result;
    }
 
    public static String doPost(String httpUrl, String param) {
 
        HttpURLConnection connection = null;
        InputStream is = null;
        OutputStream os = null;
        BufferedReader br = null;
        String result = null;
        try {
            URL url = new URL(httpUrl);
            // 通过远程url连接对象打开连接
            connection = (HttpURLConnection) url.openConnection();
            // 设置连接请求方式
            connection.setRequestMethod("POST");
            // 设置连接主机服务器超时时间:15000毫秒
            connection.setConnectTimeout(15000);
            // 设置读取主机服务器返回数据超时时间:60000毫秒
            connection.setReadTimeout(60000);
 
            // 默认值为:false,当向远程服务器传送数据/写数据时,需要设置为true
            connection.setDoOutput(true);
            // 默认值为:true,当前向远程服务读取数据时,设置为true,该参数可有可无
            connection.setDoInput(true);
            // 设置传入参数的格式:请求参数应该是 name1=value1&name2=value2 的形式。
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            // 设置鉴权信息:Authorization: Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0
            connection.setRequestProperty("Authorization", "Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0");
            // 通过连接对象获取一个输出流
            os = connection.getOutputStream();
            // 通过输出流对象将参数写出去/传输出去,它是通过字节数组写出的
            os.write(param.getBytes());
            // 通过连接对象获取一个输入流,向远程读取
            if (connection.getResponseCode() == 200) {
 
                is = connection.getInputStream();
                // 对输入流对象进行包装:charset根据工作项目组的要求来设置
                br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
 
                StringBuffer sbf = new StringBuffer();
                String temp = null;
                // 循环遍历一行一行读取数据
                while ((temp = br.readLine()) != null) {
                    sbf.append(temp);
                    sbf.append("\r\n");
                }
                result = sbf.toString();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != br) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != os) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            // 断开与远程地址url的连接
            connection.disconnect();
        }
        return result;
    }
}

3、实际的运行效果

432371083711700 [Thread[main,5,main]] All thread is ready, concurrent going...
请求结果={"errorText":"同一接口访问上限,请稍后再试","iTotalRecords":0,"aaData":"","iTotalDisplayRecords":0,"errorCode":"bm_code_url_max_count","sEcho":"","iDisplayStart":0}

请求结果={"errorText":"同一接口访问上限,请稍后再试","iTotalRecords":0,"aaData":"","iTotalDisplayRecords":0,"errorCode":"bm_code_url_max_count","sEcho":"","iDisplayStart":0}

请求结果={"errorText":"同一接口访问上限,请稍后再试","iTotalRecords":0,"aaData":"","iTotalDisplayRecords":0,"errorCode":"bm_code_url_max_count","sEcho":"","iDisplayStart":0}

请求结果={"errorText":"同一接口访问上限,请稍后再试","iTotalRecords":0,"aaData":"","iTotalDisplayRecords":0,"errorCode":"bm_code_url_max_count","sEcho":"","iDisplayStart":0}

432371398025100 [Thread-0] iCounter = 3
432371397965500 [Thread-4] iCounter = 2
432371397920900 [Thread-1] iCounter = 1
432371398091600 [Thread-2] iCounter = 4
请求结果={"errorText":"同一接口访问上限,请稍后再试","iTotalRecords":0,"aaData":"","iTotalDisplayRecords":0,"errorCode":"bm_code_url_max_count","sEcho":"","iDisplayStart":0}

432371398524800 [Thread-6] iCounter = 5
请求结果={"errorText":"操作成功","iTotalRecords":0,"aaData":"","iTotalDisplayRecords":0,"errorCode":"success","sEcho":"","iDisplayStart":0}

432371410285100 [Thread-3] iCounter = 6
请求结果={"errorText":"操作成功","iTotalRecords":0,"aaData":"","iTotalDisplayRecords":0,"errorCode":"success","sEcho":"","iDisplayStart":0}

432371410399200 [Thread-5] iCounter = 7
432371411959300 [Thread[main,5,main]] All thread is completed.