SpringBoot 接口并发限制(Semaphore)

可以使用 JMeter 辅助测试 https://blog.csdn.net/weixin_45014379/article/details/124190381

@RestController
@RequestMapping({"/Test"})
public class test { 

    Logger logger = LoggerFactory.getLogger(this.getClass());
 
    // 使用 Semaphore 并发限制3个 超过阻塞
    private final Semaphore permit = new Semaphore(3, true);


    @GetMapping(value = {"/download"})
    public String download(HttpServletRequest request) {        
        String result = "";
        try {
            // 获取令牌			
            logger.info("锁住 {}", Thread.currentThread().getName());
            permit.acquire();
            logger.info("下载 {}", Thread.currentThread().getName());
            Thread.sleep(5000);
            result = "Success";
        } catch (Exception e) {
            e.printStackTrace();
            return e.getMessage();
        } finally {
            // 释放令牌
            permit.release(); 
            logger.info("释放 {}", Thread.currentThread().getName());
        } 
　　　　return result ;

} }

参考：https://www.cnblogs.com/JCcccit/p/16868409.html