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>