如何自定义异常

public class ServiceException extends Exception { public ServiceException() {  super("业务层异常!"); }  public ServiceException(String msg) {  super(msg); } }

 

在代码中就应用

public void validateSal(String job, double sal) throws ServiceException {if("CLERK".equals(job) && (sal < 1000 || sal > 10000)) {throw new ServiceException("软降工程师的工资不在正常范围内!");} else if("SALESMAN".equals(job) && (sal < 5000 || sal > 20000)) {throw new ServiceException("系统架构师的工资不在正常范围内!");} else if("MANAGER".equals(job) && (sal < 800 || sal > 5000)) {throw new ServiceException("软件测试师的工资不在正常范围内!");}}