SpringMVC4.x学习系列之全局异常处理

程序编码方式：
import javax.servlet.http.HttpServletRequest;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
@ControllerAdvice
public class ExceptionControllerAdvice {

    private Logger log = LogManager.getLogger("ExceptionControllerAdvice");

    @ExceptionHandler
    public String expAdvice(HttpServletRequest req, Exception ex){
        req.setAttribute("ex", ex.getMessage());
        log.error(ex);
        //返回错误提示页面，实际开发时可根据不同的异常类型区别对待。
        return "errors/error";
    }
}
XML配置方式：
 <bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
    <property name="exceptionMappings">
        <props>
            <prop key="java.lang.Exception">errors/error</prop>
            <prop key="java.lang.Throwable">errors/error</prop>
        </props>
    </property>
    <property name="defaultErrorView" value="errors/error"/>
</bean>