注解文档下 test 示例的问题

[mathcompelte]

Issue Description

Type: bug report or feature request

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[sczyh30]

可否详细描述下，配以例子

[JiangZian]

Can you describe it in detail

[mathcompelte]

可否详细描述下，配以例子

https://github.com/alibaba/Sentinel/wiki/%E6%B3%A8%E8%A7%A3%E6%94%AF%E6%8C%81
中文文档里面的TestService这个test()方法的参数列表没有和Fallback函数一样。该处代码有误。
public class TestService {

// 对应的 `handleException` 函数需要位于 `ExceptionUtil` 类中，并且必须为 static 函数.
@SentinelResource(value = "test", blockHandler = "handleException", blockHandlerClass = {ExceptionUtil.class})
public void test() {
    System.out.println("Test");
}

// 原函数
@SentinelResource(value = "hello", blockHandler = "exceptionHandler", fallback = "helloFallback")
public String hello(long s) {
    return String.format("Hello at %d", s);
}

// Fallback 函数，函数签名与原函数一致或加一个 Throwable 类型的参数.
public String helloFallback(long s) {
    return String.format("Halooooo %d", s);
}

// Block 异常处理函数，参数最后多一个 BlockException，其余与原函数一致.
public String exceptionHandler(long s, BlockException ex) {
    // Do some log here.
    ex.printStackTrace();
    return "Oops, error occurred at " + s;
}

}

[sczyh30]

第一个 test 的例子的目的是演示 blockHandler 在其它类时的配置 (blockHandlerClass)，独立于 hello 的示例。这里放在最前面容易导致误解，已进行调整。