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@GetMapping("/byResource")
@SentinelResource(value = "byResource", blockHandler = "handleException")
public CommonResult byResource() {
    return CommonResult.success("按资源名称限流测试OK");
}

@GetMapping("/byUrl")
@SentinelResource(value = "byUrl", blockHandler = "handleException")
public CommonResult byUrl() {
    return CommonResult.success("按url限流测试OK");
}

public CommonResult handleException(BlockException exception) {
    return CommonResult.error(444, exception.getClass().getCanonicalName() + "\t 服务不可用");
}

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Blocked by Sentinel (flow limiting)

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{
  "code": 444,
  "desc": "com.alibaba.csp.sentinel.slots.block.flow.FlowException\t 服务不可用",
  "data": null
}

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package com.eh.cloudalibaba.sentinel;

import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.eh.cloud2020.common.entity.CommonResult;

/**
 * 自定义限流处理类
 */
public class CustomBlockHandler {
    public static CommonResult handlerException1(BlockException exception) {
        return CommonResult.error(444, "按客戶自定义,global handlerException----1");
    }

    public static CommonResult handlerException2(BlockException exception) {
        return CommonResult.error(444, "按客戶自定义,global handlerException----2");
    }
}

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@GetMapping("/byResource")
@SentinelResource(value = "byResource", blockHandlerClass = CustomBlockHandler.class, blockHandler = "handlerException1")
public CommonResult byResource() {
    return CommonResult.success("按资源名称限流测试OK");
}

@GetMapping("/byUrl")
@SentinelResource(value = "byUrl", blockHandlerClass = CustomBlockHandler.class, blockHandler = "handlerException1")
public CommonResult byUrl() {
    return CommonResult.success("按url限流测试OK");
}

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{
  "code": 444,
  "desc": "按客戶自定义,global handlerException----1",
  "data": null
}

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Blocked by Sentinel (flow limiting)

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@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
public @interface SentinelResource {

    /**
     * @return name of the Sentinel resource
     */
    String value() default "";

    /**
     * @return the entry type (inbound or outbound), outbound by default
     */
    EntryType entryType() default EntryType.OUT;

    /**
     * @return the classification (type) of the resource
     * @since 1.7.0
     */
    int resourceType() default 0;

    /**
     * @return name of the block exception function, empty by default
     */
    String blockHandler() default "";

    /**
     * The {@code blockHandler} is located in the same class with the original method by default.
     * However, if some methods share the same signature and intend to set the same block handler,
     * then users can set the class where the block handler exists. Note that the block handler method
     * must be static.
     *
     * @return the class where the block handler exists, should not provide more than one classes
     */
    Class<?>[] blockHandlerClass() default {};

    /**
     * @return name of the fallback function, empty by default
     */
    String fallback() default "";

    /**
     * The {@code defaultFallback} is used as the default universal fallback method.
     * It should not accept any parameters, and the return type should be compatible
     * with the original method.
     *
     * @return name of the default fallback method, empty by default
     * @since 1.6.0
     */
    String defaultFallback() default "";

    /**
     * The {@code fallback} is located in the same class with the original method by default.
     * However, if some methods share the same signature and intend to set the same fallback,
     * then users can set the class where the fallback function exists. Note that the shared fallback method
     * must be static.
     *
     * @return the class where the fallback method is located (only single class)
     * @since 1.6.0
     */
    Class<?>[] fallbackClass() default {};

    /**
     * @return the list of exception classes to trace, {@link Throwable} by default
     * @since 1.5.1
     */
    Class<? extends Throwable>[] exceptionsToTrace() default {Throwable.class};
    
    /**
     * Indicates the exceptions to be ignored. Note that {@code exceptionsToTrace} should
     * not appear with {@code exceptionsToIgnore} at the same time, or {@code exceptionsToIgnore}
     * will be of higher precedence.
     *
     * @return the list of exception classes to ignore, empty by default
     * @since 1.6.0
     */
    Class<? extends Throwable>[] exceptionsToIgnore() default {};
}