java多线程压力测试接口

1.定义一个controller，里面写个测试方法，用于postman测试

    @GetMapping("/toTestThread")
    public void demosendThread() {
        
        try {
            startTime = System.currentTimeMillis();
            System.out.println("CountDownLatch started at: " + startTime);
            // 初始化计数器为1
            CountDownLatch countDownLatch = new CountDownLatch(1);
            for (int i = 0; i < THREAD_NUM; i++) {
                new Thread(new Run(countDownLatch)).start();
            }
            // 启动多个线程
            countDownLatch.countDown();
        } catch (Exception e) {
            System.out.println("Exception: " + e);
        }

    }

2.书写多线程

    /**
     * 线程类
     */
    private class Run implements Runnable {
        private final CountDownLatch startLatch;

        public Run(CountDownLatch startLatch) {
            this.startLatch = startLatch;
        }

        @Override
        public void run() {
            try {
                // 线程等待
                startLatch.await();
                // 执行操作
                /** 这里调用你要测试的接口 */

                String msg = "{\n" +
                        "    \"name\":\"终端1\",\n" +
                        "    \"id\":\"202303110001xl\",\n" +
                        "    \"terminal\":\"COL\",\n" +
                        "    \"mtype\":\"MSGE\",\n" +
                        "    \"t\":\"2023-05-05 09:28:47.475\",\n" +
                        "    \"params\":[\n" +
                        "        {\n" +
                        "            \"kks\":\"发变811层/机组1.电压1\",\n" +
                        "            \"ref\":\"发变811层/机组1.电压1\",\n" +
                        "            \"val\":\"0.56-kV\",\n" +
                        "            \"vtype\":\"电压\",\n" +
                        "            \"t\":\"2023-05-05 09:28:47.872\"\n" +
                        "        }\n" +
                        "    ]\n" +
                        "}";


                JSONObject jsonObject = JSONObject.parseObject(msg);
                HelloSpringMsg helloReq = new HelloSpringMsg();
                helloReq.setJson(String.valueOf(jsonObject));

                //具体接口
                demoSpringAction.here(helloReq);

                long endTime = System.currentTimeMillis();
                System.out.println(Thread.currentThread().getName() + " ended at: " + endTime + ", cost: " + (endTime - startTime) + " ms.");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }

　　3.两个静态变量定义

    /** * 定义并发线程数量 */
    public static final int THREAD_NUM = 100;
    /** * 开始时间 */
    private static long startTime = 0L;

　　4.查看控制台调用情况