自定义异常，以assert的形式抛出异常 java

一、类关联图
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二、说明

1.通过ResponseEnum中定义的异常枚举信息，判断抛出异常；
2.判断方法为公共方法，写在自定义的assert里，代码判断时调用；
【自定义异常，以assert的形式抛出异常】3.利用自定义的枚举常量直接可以引用assert里的公共方法，有异常即会抛出自己指定的异常；

三、源码讲解

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3.1异常类 3.1.1 BaseException类

package com.geo.source.exception.customassert.exception; import com.geo.source.exception.customassert.IResponseEnum; /** * @author YanZhen * @date 2020/05/08 14:25 **/ public class BaseException extends RuntimeException { /** * 错误码 */ private int errorCode; /** * 错误信息 */ private String errorMessage; /** * 传参 */ private Object errorResult; public BaseException(IResponseEnum resp, Object os) { super(resp.getMessage()); this.errorCode = resp.getCode(); this.errorMessage = resp.getMessage(); this.errorResult = os; }public int getErrorCode() { return errorCode; }public String getErrorMessage() { return errorMessage; }public Object getErrorResult() { return errorResult; } }

3.1.2 BusinessException类

package com.geo.source.exception.customassert.exception; import com.geo.source.exception.customassert.IResponseEnum; /** * 业务异常 * * @author YanZhen * @date 2020/05/08 13:48 **/ public class BusinessException extends BaseException { private static final long serialVersionUID = 1L; public BusinessException(IResponseEnum resp) { super(resp, null); }public BusinessException(IResponseEnum resp, Object os) { super(resp, os); } }

3.2 assert和响应枚举 3.2.1 CustomAssert 类

package com.geo.source.exception.customassert; import com.geo.source.exception.customassert.exception.BaseException; /** * 自定义断言 * @author YanZhen * @date 2020/05/08 13:24 **/ public interface CustomAssert { /** * 创建异常 * @return 异常信息 */ BaseException newException(); /** * 创建异常 * @param args 参数 * @return 异常信息 */ BaseException newException(Object args); /** * 创建异常 * @param t 异常 * @param args 参数 * @return 异常信息 */ BaseException newException(Throwable t, Object args); /** * 是否为空，抛出异常 * @param o 判断对象 */ default void assertNotNull(Object o) { if (o == null) { throw newException(); } }/** * 是否为空，抛出异常 * @param o 判断对象 * @param args 参数 */ default void assertNotNull(Object o, Object args) { if (o == null) { throw newException(args); } } }

3.2.2 IResponseEnum类

package com.geo.source.exception.customassert; /** * 响应信息枚举值模板 * @author YanZhen * @date 2020/05/08 13:44 **/ public interface IResponseEnum { /** * 错误编码 * @return 错误编码 */ int getCode(); /** * 错误信息 * @return 错误信息 */ String getMessage(); }

3.2.3 BusinessAssertException类

package com.geo.source.exception.customassert; import com.geo.source.exception.customassert.exception.BaseException; import com.geo.source.exception.customassert.exception.BusinessException; /** * 业务异常断言 * @author YanZhen * @date 2020/05/08 14:07 **/ public interface BusinessAssertException extends IResponseEnum, CustomAssert { @Override default BaseException newException() { return newException(null, null); }@Override default BaseException newException(Object args) { return newException(null, args); }@Override default BaseException newException(Throwable t, Object args) { return new BusinessException(this, args); } }

3.3测试

package com.geo.source.exception; import com.geo.source.exception.customassert.exception.BusinessException; import com.geo.source.exception.exceptinenum.ResponseEnum; import com.geo.source.exception.simple_example.SimpleBusinessException; import com.geo.source.exception.simple_example.SimpleResponseEnum; /** * @author YanZhen * @date 2020/05/08 14:16 **/ public class TestMain { public static void main(String[] args) { v1(); }/** * 异常抛出第一版 */ private static void v1() { try { ResponseEnum.LICENCE_NOT_FOUND.assertNotNull(123); ResponseEnum.SYSTEM_EXCEPTION.assertNotNull(null, "123"); } catch (Exception e) { BusinessException ex = (BusinessException) e; System.out.println(ex.getErrorCode() + " : " + ex.getErrorMessage()); System.out.println("传入的参数为：" + ex.getErrorResult()); } } }