使用Spring进行统一日志管理 + 统一异常管理
统一日志和异常管理配置好后,SSH项目中,代码以往散落的log.info() 和 try..catch..finally 再也不见踪影!
统一日志异常实现类:
- package com.pilelot.web.util;
- import org.apache.log4j.Logger;
- import org.springframework.aop.ThrowsAdvice;
- import org.springframework.dao.DataAccessException;
- import java.io.IOException;
- import java.lang.reflect.Method;
- import java.sql.SQLException;
- /**
- * 由Spring AOP调用 输出异常信息,把程序异常抛向业务异常
- *
- * @author Andy Chan
- *
- */
- public class ExceptionAdvisor implements ThrowsAdvice
- {
- public void afterThrowing(Method method, Object[] args, Object target,
- Exception ex) throws Throwable
- {
- // 在后台中输出错误异常异常信息,通过log4j输出。
- Logger log = Logger.getLogger(target.getClass());
- log.info("**************************************************************");
- log.info("Error happened in class: " + target.getClass().getName());
- log.info("Error happened in method: " + method.getName());
- for (int i = 0; i < args.length; i++)
- {
- log.info("arg[" + i + "]: " + args[i]);
- }
- log.info("Exception class: " + ex.getClass().getName());
- log.info("ex.getMessage():" + ex.getMessage());
- ex.printStackTrace();
- log.info("**************************************************************");
- // 在这里判断异常,根据不同的异常返回错误。
- if (ex.getClass().equals(DataAccessException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("数据库操作失败!");
- } else if (ex.getClass().toString().equals(
- NullPointerException.class.toString()))
- {
- ex.printStackTrace();
- throw new BusinessException("调用了未经初始化的对象或者是不存在的对象!");
- } else if (ex.getClass().equals(IOException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("IO异常!");
- } else if (ex.getClass().equals(ClassNotFoundException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("指定的类不存在!");
- } else if (ex.getClass().equals(ArithmeticException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("数学运算异常!");
- } else if (ex.getClass().equals(ArrayIndexOutOfBoundsException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("数组下标越界!");
- } else if (ex.getClass().equals(IllegalArgumentException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("方法的参数错误!");
- } else if (ex.getClass().equals(ClassCastException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("类型强制转换错误!");
- } else if (ex.getClass().equals(SecurityException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("违背安全原则异常!");
- } else if (ex.getClass().equals(SQLException.class))
- {
- ex.printStackTrace();
- throw new BusinessException("操作数据库异常!");
- } else if (ex.getClass().equals(NoSuchMethodError.class))
- {
- ex.printStackTrace();
- throw new BusinessException("方法末找到异常!");
- } else if (ex.getClass().equals(InternalError.class))
- {
- ex.printStackTrace();
- throw new BusinessException("Java虚拟机发生了内部错误");
- } else
- {
- ex.printStackTrace();
- throw new BusinessException("程序内部错误,操作失败!" + ex.getMessage());
- }
- }
- }
自定义业务异常处理类 友好提示:
- package com.pilelot.web.util;
- /**
- * 自定义业务异常处理类 友好提示
- * @author Andy Chan
- *
- */
- public class BusinessException extends RuntimeException
- {
- private static final long serialVersionUID = 3152616724785436891L;
- public BusinessException(String frdMessage)
- {
- super(createFriendlyErrMsg(frdMessage));
- }
- public BusinessException(Throwable throwable)
- {
- super(throwable);
- }
- public BusinessException(Throwable throwable, String frdMessage)
- {
- super(throwable);
- }
- private static String createFriendlyErrMsg(String msgBody)
- {
- String prefixStr = "抱歉,";
- String suffixStr = " 请稍后再试或与管理员联系!";
- StringBuffer friendlyErrMsg = new StringBuffer("");
- friendlyErrMsg.append(prefixStr);
- friendlyErrMsg.append(msgBody);
- friendlyErrMsg.append(suffixStr);
- return friendlyErrMsg.toString();
- }
- }
统一日志处理实现类:
- package com.pilelot.web.util;
- import org.aopalliance.intercept.MethodInterceptor;
- import org.aopalliance.intercept.MethodInvocation;
- import org.apache.log4j.Logger;
- /**
- * Spring 统一日志处理实现类
- * @author Andy Chan
- *
- */
- public class LogInterceptor implements MethodInterceptor
- {
- public Object invoke(MethodInvocation invocation) throws Throwable
- {
- Logger loger = Logger.getLogger(invocation.getClass());
- loger.info("--Log By Andy Chan -----------------------------------------------------------------------------");
- loger.info(invocation.getMethod() + ":BEGIN!--(Andy ChanLOG)");// 方法前的操作
- Object obj = invocation.proceed();// 执行需要Log的方法
- loger.info(invocation.getMethod() + ":END!--(Andy ChanLOG)");// 方法后的操作
- loger.info("-------------------------------------------------------------------------------------------------");
- return obj;
- }
- }
Spring配置文件添加:
- <!-- Spring 统一日志处理 LogInterceptor拦截器 配置 -->
- <bean id="logLnterceptor" class="com.pilelot.web.util.LogInterceptor"/>
- <!-- Spring 统一异常处理 ExceptionAdvisor配置 -->
- <bean id="exceptionHandler" class="com.pilelot.web.util.ExceptionAdvisor"></bean>
- <!-- Bean自动代理处理器 配置-->
- <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator" >
- <property name="beanNames">
- <list> <!-- 配置需要进行日志记录的Service和Dao -->
- <value>commonDao</value>
- <!-- 配置所有Service结尾命名的Bean,即所有Service层的类都要经过exceptionHandler异常处理类 -->
- <value>*Service</value> <!-- Service层的Bean ID 命名要以Service结尾 -->
- </list>
- </property>
- <property name="interceptorNames">
- <list>
- <value>exceptionHandler</value>
- <value>logLnterceptor</value>
- <!--<value>transactionInterceptor</value>-->
- </list>
- </property>
- </bean>
- lt;!-- ——————————————————Spring 统一日志处理 + 统一异常处理 配置结束—————————————悲伤的分隔线—————————— -->
这样简单三步,就实现了由Spring统一日志+统一异常管理,代码清爽了不少!