kotlin项目工程中统一异常处理类

末蓝、 2022-09-11 10:23 141阅读 0赞

程序开发中，将异常做统一的处理，将提示语区分中英文，放在国际化的资源类中。  
![在这里插入图片描述][60d3bf87bc6b48bdbc5977f67f881b7a.png]![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATW9ua2V5S2luZ19zdW55dWh1YQ_size_7_color_FFFFFF_t_70_g_se_x_16]  
![在这里插入图片描述][d46741d655b94e9d83adcdf5a1885edb.png]

## 1、异常的基础类，继承RuntimeException ##

import mu.KotlinLogging
    import java.io.Serializable
    import java.lang.RuntimeException
    
    /** * 异常的基础类，继承RuntimeException * @program: EXceptionDemo * @description: BaseException * @author: sunyuhua * @create: 2021-09-13 17:19 */
    open class BaseException : RuntimeException, Serializable { 
    	private val logger = KotlinLogging.logger{ }
    	constructor() { }
    	constructor(message: String?) : super(message) { 
    		logger.error(message)
    	}
    	constructor(cause: Throwable?) : super(cause) { 
    
    	}
    	constructor(message: String?, cause: Throwable?) : super(message, cause) { 
    		logger.error("$message==$cause")
    	}
    }

## 2、业务处理异常 ##

import com.fastonetech.util.Result
    
    /** * 业务处理异常 * 指用户输入了非法数据等业务逻辑存在的异常 * @program: EXceptionDemo * @description: BusinessException * @author: sunyuhua * @create: 2021-09-14 10:04 */
    class BusinessException : BaseException { 
    	var result = Result()
    
    	constructor(result: Result) : super("${ result.code}:${ result.msg}") { 
    		this.result = result
    	}
    
    	constructor(code: Int, msg: String) : super("$code:$msg") { 
    		result.code = code
    		result.msg = msg
    	}
    
    	constructor(result: Result, cause: Throwable?) : super("${ result.code}:${ result.msg}", cause) { 
    		this.result = result
    	}
    
    	constructor(code: Int, msg: String, cause: Throwable?) : super("$code:$msg", cause) { 
    		result.code = code
    		result.msg = msg
    	}
    }

## 3、系统级异常 ##

import com.fastonetech.util.Result
    
    /** * 系统级异常。 * 指系统级别的，如：网络通信时连接中断、系统连接、超时等异常 * @program: EXceptionDemo * @description: SystemException * @author: sunyuhua * @create: 2021-09-14 10:00 */
    class SystemException : BaseException { 
    	var result = Result()
    
    	constructor(result: Result) : super("${ result.code}:${ result.msg}") { 
    		this.result = result
    	}
    
    	constructor(code: Int, msg: String) : super("$code:$msg") { 
    		result.code = code
    		result.msg = msg
    	}
    
    	constructor(result: Result, cause: Throwable?) : super("${ result.code}:${ result.msg}", cause) { 
    		this.result = result
    	}
    
    	constructor(code: Int, msg: String, cause: Throwable?) : super("$code:$msg", cause) { 
    		result.code = code
    		result.msg = msg
    	}
    }

## 4、异常错误信息返回的实体类 ##

import lombok.Data
    import lombok.ToString
    import java.io.Serializable
    
    /** * 异常错误信息返回的实体类 * @program: EXceptionDemo * @description: Result * @author: sunyuhua * @create: 2021-09-14 10:01 */
    @Data
    @ToString
    class Result : Serializable { 
    	//状态码
    	var code: Int? = null
    
    	//提示信息
    	var msg: String? = null
    
    	//结果数据
    	var data: Any? = null
    
    	constructor() { }
    	constructor(code: Int?, msg: String?) { 
    		this.code = code
    		this.msg = msg
    	}
    }

## 5、全局异常捕获处理 ##

import org.springframework.web.bind.annotation.ControllerAdvice
    import com.fastonetech.exception.BusinessException
    import org.springframework.http.ResponseEntity
    import com.fastonetech.exception.SystemException
    import mu.KotlinLogging
    import org.springframework.http.HttpStatus
    import org.springframework.web.bind.annotation.ExceptionHandler
    
    /** * 全局异常捕获处理 * @program: EXceptionDemo * @description: GlobalExceptionHandler * @author: sunyuhua * @create: 2021-09-14 10:11 */
    @ControllerAdvice
    class GlobalExceptionHandler { 
    	private val logger = KotlinLogging.logger{ }
    	/** * 业务逻辑异常。 * HTTP响应状态为200 * @param businessException * @return */
    	@ExceptionHandler(value = [BusinessException::class])
    	fun businessExceptionHandler(businessException: BusinessException): ResponseEntity<*> { 
    		val result = businessException.result
    		logger.error(businessException.printStackTrace().toString())
    		return ResponseEntity<Any?>(result, HttpStatus.OK)
    	}
    
    	/** * 系统异常。 * HTTP响应状态为400 * @param systemException * @return */
    	@ExceptionHandler(value = [SystemException::class])
    	fun systemExceptionHandler(systemException: SystemException): ResponseEntity<*> { 
    		val result = systemException.result
    		logger.error(systemException.printStackTrace().toString())
    		return ResponseEntity<Any?>(result, HttpStatus.BAD_REQUEST)
    	}
    }

## 6、国际化能力 ##

import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.LocaleResolver;
    import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
    import org.springframework.web.servlet.i18n.SessionLocaleResolver;
    
    import java.util.Locale;
    
    /** * 国际化的配置 * @program: balance * @description: LocaleConfig * @author: sunyuhua * @create: 2021-09-14 14:54 **/
    @Configuration
    public class LocaleConfig { 
    
    	/** * 默认解析器 其中locale表示默认语言 */
    	@Bean
    	public LocaleResolver localeResolver() { 
    		SessionLocaleResolver localeResolver = new SessionLocaleResolver();
    		localeResolver.setDefaultLocale(Locale.CHINA);
    		return localeResolver;
    	}
    
    	/** * 默认拦截器 其中lang表示切换语言的参数名 */
    	@Bean
    	public WebMvcConfigurer localeInterceptor() { 
    		return new WebMvcConfigurer() { 
    			@Override
    			public void addInterceptors(InterceptorRegistry registry) { 
    				LocaleChangeInterceptor localeInterceptor = new LocaleChangeInterceptor();
    				localeInterceptor.setParamName("lang");
    				registry.addInterceptor(localeInterceptor);
    			}
    		};
    	}
    }

## 7、国际化文件 ##

300301 = 线下转账出现异常，请检查账户信息
    300302 = 充值的订单号不能为空,请检查
    300303 = 租户Id不能为空，请检查
    300304 = 消费的订单Id不能为空，请检查
    
    300401 = 支付宝支付，支付校验，out_trade_no错误
    300402 = 支付宝支付，支付校验，total_amount错误

## 8、工程中引用的代码 ##

![在这里插入图片描述][4ff8a416f75b411b9d07ebc61357fec0.png]

[60d3bf87bc6b48bdbc5977f67f881b7a.png]: https://img-blog.csdnimg.cn/60d3bf87bc6b48bdbc5977f67f881b7a.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBATW9ua2V5S2luZ19zdW55dWh1YQ_size_7_color_FFFFFF_t_70_g_se_x_16]: /images/20220828/f77704cc1e694b13a157f7099de3ccbc.png
[d46741d655b94e9d83adcdf5a1885edb.png]: /images/20220828/861d17f5db664756bdbb933d7a872f05.png
[4ff8a416f75b411b9d07ebc61357fec0.png]: /images/20220828/5a0006690e944b6ebf94f3777f81b18e.png