api接口高并发测试

pom.xml

<dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
        </dependency>

URLTest .java

package com.example.demo.controller;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

/****
 * Executors.newSingleThreadExecutor()取得的Executor实例有以下特性:
任务顺序执行. 比如：
executor.submit(task1);
executor.submit(task2);
必须等task1执行完，task2才能执行。
task1和task2会被放入一个队列里，由一个工作线程来处理。即：一共有2个线程(主线程、处理任务的工作线程）。
 
以上如果是单机可以解决,如果是多台服务器的话,仍然还是会存在并发的问题.
或者使用mysql数据库修改的特性,update排序依次来修改,增加否决字段,修改的时候带上条件值,可以解决并发问题.(多个租客租时间段重叠的同一辆车且自动接单,这个情况就很明显凸现出来.)
 * @author admin
 *
 */
public class URLTest {
    private static int thread_num = 500;
    private static int client_num = 500;

    public static void main(String[] args) throws IOException {
        
        
        ExecutorService exec = Executors.newCachedThreadPool();
        // thread_num个线程可以同时访问
        final Semaphore semp = new Semaphore(thread_num);
        // 模拟client_num个客户端访问
        for (int index = 0; index < client_num; index++) {
            final int NO = index;
            Runnable run = new Runnable() {
                public void run() {
                    System.out.println("------------------------");
                    CloseableHttpClient httpclient = null;
                    CloseableHttpResponse response = null;
                    
                    try {
                        httpclient = HttpClients.createDefault();
                        HttpPost post = new HttpPost( "http://ip:8099/appDevice/cardInfo");    
                        
                        FileBody fileHead = new FileBody(new File("D:\\0fc756c37caf4f2cb63998892f81e7fc1538037176605MWYTMX.jpeg"));
                        FileBody filePic = new FileBody(new File("D:\\3dea9aeb81bf457c8090ddfd3bcbb6431531478197207WEAJIR.jpg"));
                        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
                        builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
                        StringBody macAddress = new StringBody("10:d0:7a:de:89:5a"); 
                        StringBody name = new StringBody("赖真"); 
                        StringBody sex = new StringBody("1"); 
                        StringBody nation = new StringBody("汉"); 
                        StringBody birthday = new StringBody("1990-10-29"); 
                        StringBody address = new StringBody("江西省赣州市宁都县固村镇上旻村横石组"); 
                        StringBody idcardNo = new StringBody("XXXXXXXXXXXXXX"); 
                        StringBody signOrganization = new StringBody("宁都县公安局"); 
                        StringBody validDate = new StringBody("2017-03-24"); 
                        StringBody expireDate = new StringBody("2037-03-24"); 
                        StringBody signDate = new StringBody("2018-10-12 10:48:00"); 
                        StringBody tel = new StringBody("15123232323"); 
                        StringBody threshold = new StringBody("90.00000"); 
                        StringBody matchScore = new StringBody("12");             
                        StringBody confidence = new StringBody("14");                                               
                        builder.addPart("fileHead", fileHead);
                        builder.addPart("filePic", filePic);
                        builder.addPart("macAddress", macAddress);
                        builder.addPart("name", name);
                        builder.addPart("sex", sex);
                        builder.addPart("nation", nation);
                        builder.addPart("birthday", birthday);
                        builder.addPart("address", address);
                        builder.addPart("idcardNo", idcardNo);
                        builder.addPart("signOrganization", signOrganization);
                        builder.addPart("validDate", validDate);
                        builder.addPart("expireDate", expireDate);
                        builder.addPart("signDate", signDate);
                        builder.addPart("tel", tel);
                        builder.addPart("threshold", threshold);
                        builder.addPart("matchScore", matchScore);
                        //builder.addPart("pixel", pixel);
                        builder.addPart("confidence", confidence);
                        HttpEntity entity = builder.build();
                        post.setEntity(entity);    
                        
                        response = httpclient.execute(post);
                        if (200 == response.getStatusLine().getStatusCode()) {
                            HttpEntity resultentity = response.getEntity();
                            String entityString = EntityUtils.toString(resultentity, "utf-8");
                            EntityUtils.consume(resultentity);
                            System.out.println(entityString);
                        } else {
                            
                        }
                                               
                    } catch (Exception e) {
                        e.printStackTrace();
                    } finally {
                        if (response != null) {
                            try {
                                response.close();
                            } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                        }
                        if (httpclient != null) {
                            try {
                                httpclient.close();
                            } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                        }
                    }
                    
                }
                
                };
                exec.execute(run);
                }
     // 退出线程池
        exec.shutdown();
            }
    
    

}