SpringMVC 异常处理

Spring MVC使用SimpleMappingExceptionResolver类异常处理

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring一beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 使用扫描机制扫描包 -->
    <context:component-scan base-package="controller" />
    <context:component-scan base-package="service" />
    <context:component-scan base-package="dao" />
    <!-- 配置视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        id="internalResourceViewResolver">
        <!--前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <!-- 后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
    <!--SimpleMappingExceptionResolver（异常类与 View 的对应关系） -->
    <bean
        class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <!-- 定义默认的异常处理页面，当该异常类型注册时使用 -->
        <property name="defaultErrorView" value="error"></property>
        <!-- 定义异常处理页面用来获取异常信息的变量名，默认名为exception -->
        <property name="exceptionAttribute" value="ex"></property>
        <!-- 定义需要特殊处理的异常，用类名或完全路径名作为key，异常页名作为值 -->
        <property name="exceptionMappings">
            <props>
                <prop key="exception.MyException">my-error</prop>
                <prop key="java.sql.SQLException">sql-error</prop>
                <!-- 在这里还可以继续扩展对不同异常类型的处理 -->
            </props>
        </property>
    </bean>
</beans>

Spring MVC使用HandlerExceptionResolver接口异常处理

 

package exception;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
public class MyExceptionHandler implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest arg0,
            HttpServletResponse arg1, Object arg2, Exception arg3) {
        Map<String, Object> model = new HashMap<String, Object>();
        model.put("ex", arg3);
        // 根据不同错误转向不同页面（统一处理），即异常与View的对应关系
        if (arg3 instanceof MyException) {
            return new ModelAndView("my-error", model);
        } else if (arg3 instanceof SQLException) {
            return new ModelAndView("sql-error", model);
        } else {
            return new ModelAndView("error", model);
        }
    }
}

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring一beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 使用扫描机制扫描包 -->
    <context:component-scan base-package="controller" />
    <context:component-scan base-package="service" />
    <context:component-scan base-package="dao" />
    <!-- 配置视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        id="internalResourceViewResolver">
        <!--前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <!-- 后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
    <!--托管MyExceptionHandler-->
    <bean class="exception.MyExceptionHandler"/>
</beans>

Spring MVC使用@ExceptionHandler注解异常处理

 

package controller;
import java.sql.SQLException;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.bind.annotation.ExceptionHandler;
import exception.MyException;
public class BaseController {
    /** 基于@ExceptionHandler异常处理 */
    @ExceptionHandler
    public String exception(HttpServletRequest request, Exception ex) {
        request.setAttribute("ex", ex);
        // 根据不同错误转向不同页面，即异常与view的对应关系
        if (ex instanceof SQLException) {
            return "sql-error";
        } else if (ex instanceof MyException) {
            return "my-error";
        } else {
            return "error";
        }
    }
}

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring一beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 使用扫描机制扫描包 -->
    <context:component-scan base-package="controller" />
    <context:component-scan base-package="service" />
    <context:component-scan base-package="dao" />
    <!-- 配置视图解析器 -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"
        id="internalResourceViewResolver">
        <!--前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <!-- 后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>