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>