一.什么是SpringMVC之JSON返回&异常处理机制
SpringMVC是一个Web框架,它提供了许多方便的特性,其中之一就是JSON返回和异常处理机制。
JSON返回指的是,当客户端向服务器发起请求时,服务器可以返回JSON格式的响应数据。这是非常常见的一种情况,特别是在前后端分离的开发模式中,后端通常会返回JSON格式的数据。
SpringMVC提供了多种方式来实现JSON返回,其中最简单的方式是使用@ResponseBody注解,这个注解可以将Controller方法返回的对象自动转换成JSON格式的数据,然后响应给客户端。如果需要更加灵活的JSON格式化方式,可以使用Jackson或者FastJSON等库进行定制化配置。
异常处理机制指的是当服务器出现异常时,SpringMVC提供了一套通用的异常处理机制,可以统一处理异常,返回友好的错误信息给客户端。在SpringMVC中,异常处理主要分为两种方式,一种是基于@ControllerAdvice注解的全局异常处理方式,另一种是基于@ExceptionHandler注解的局部异常处理方式。通过这两种方式,我们可以针对不同的异常类型进行不同的处理,比如返回特定的错误码、错误信息等。这样可以提高系统的容错性和可靠性。
二.Json处理
导入pom.xml依赖
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>xyzy</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>xyzy Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version> <!--添加jar包依赖--> <!--1.spring 5.0.2.RELEASE相关--> <spring.version>5.0.2.RELEASE</spring.version> <!--2.mybatis相关--> <mybatis.version>3.4.5</mybatis.version> <!--mysql--> <mysql.version>5.1.44</mysql.version> <!--pagehelper分页jar依赖--> <pagehelper.version>5.1.2</pagehelper.version> <!--mybatis与spring集成jar依赖--> <mybatis.spring.version>1.3.1</mybatis.spring.version> <!--3.dbcp2连接池相关 druid--> <commons.dbcp2.version>2.1.1</commons.dbcp2.version> <commons.pool2.version>2.4.3</commons.pool2.version> <!--4.log日志相关--> <log4j2.version>2.9.1</log4j2.version> <log4j2.disruptor.version>3.2.0</log4j2.disruptor.version> <slf4j.version>1.7.13</slf4j.version> <!--5.其他--> <junit.version>4.12</junit.version> <servlet.version>4.0.0</servlet.version> <lombok.version>1.18.2</lombok.version> <mybatis.ehcache.version>1.1.0</mybatis.ehcache.version> <ehcache.version>2.10.0</ehcache.version> <redis.version>2.9.0</redis.version> <redis.spring.version>1.7.1.RELEASE</redis.spring.version> <jackson.version>2.9.3</jackson.version> <jstl.version>1.2</jstl.version> <standard.version>1.1.2</standard.version> <tomcat-jsp-api.version>8.0.47</tomcat-jsp-api.version> <commons-fileupload.version>1.3.3</commons-fileupload.version> <hibernate-validator.version>5.0.2.Final</hibernate-validator.version> <shiro.version>1.3.2</shiro.version> </properties> <dependencies> <!--1.spring相关--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!--2.mybatis相关--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!--mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!--pagehelper分页插件jar包依赖--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>${pagehelper.version}</version> </dependency> <!--mybatis与spring集成jar包依赖--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis.spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <!--mybatis与ehcache整合--> <dependency> <groupId>org.mybatis.caches</groupId> <artifactId>mybatis-ehcache</artifactId> <version>${mybatis.ehcache.version}</version> </dependency> <!--ehcache依赖--> <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> <version>${ehcache.version}</version> </dependency> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>${redis.version}</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>${redis.spring.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>${jackson.version}</version> </dependency> <!--3.dbcp2连接池相关--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> <version>${commons.dbcp2.version}</version> <exclusions> <exclusion> <artifactId>commons-pool2</artifactId> <groupId>org.apache.commons</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> <version>${commons.pool2.version}</version> </dependency> <!--springmvc依赖--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!--4.log日志相关依赖--> <!-- log4j2日志相关依赖 --> <!-- log配置:Log4j2 + Slf4j --> <!-- slf4j核心包--> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>${slf4j.version}</version> <scope>runtime</scope> </dependency> <!--核心log4j2jar包--> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>${log4j2.version}</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>${log4j2.version}</version> </dependency> <!--用于与slf4j保持桥接--> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-slf4j-impl</artifactId> <version>${log4j2.version}</version> </dependency> <!--web工程需要包含log4j-web,非web工程不需要--> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-web</artifactId> <version>${log4j2.version}</version> <scope>runtime</scope> </dependency> <!--需要使用log4j2的AsyncLogger需要包含disruptor--> <dependency> <groupId>com.lmax</groupId> <artifactId>disruptor</artifactId> <version>${log4j2.disruptor.version}</version> </dependency> <!--5.其他--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <!-- <scope>test</scope>--> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>${servlet.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> <scope>provided</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>${jstl.version}</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>${standard.version}</version> </dependency> <dependency> <groupId>org.apache.tomcat</groupId> <artifactId>tomcat-jsp-api</artifactId> <version>${tomcat-jsp-api.version}</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>${commons-fileupload.version}</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>${hibernate-validator.version}</version> </dependency> <!--shiro依赖--> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-core</artifactId> <version>${shiro.version}</version> </dependency> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-web</artifactId> <version>${shiro.version}</version> </dependency> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-spring</artifactId> <version>${shiro.version}</version> </dependency> </dependencies> <build> <finalName>xyzy</finalName> <resources> <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题--> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题--> <resource> <directory>src/main/resources</directory> <includes> <include>*.properties</include> <include>*.xml</include> </includes> </resource> </resources> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>${maven.compiler.plugin.version}</version> <configuration> <source>${maven.compiler.source}</source> <target>${maven.compiler.target}</target> <encoding>${project.build.sourceEncoding}</encoding> </configuration> </plugin> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <dependencies> <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> </dependencies> <configuration> <overwrite>true</overwrite> </configuration> </plugin> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </build> </project>
导入Spring-Mvc.xml
<?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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--1) 扫描com.zking.zf及子子孙孙包下的控制器(扫描范围过大,耗时)--> <context:component-scan base-package="com.xy"/> <!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter --> <mvc:annotation-driven /> <!--3) 创建ViewResolver视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- viewClass需要在pom中引入两个包:standard.jar and jstl.jar --> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> <!--4) 单独处理图片、样式、js等资源 --> <!-- <mvc:resources location="/css/" mapping="/css/**"/>--> <!-- <mvc:resources location="/js/" mapping="/js/**"/>--> <!-- <mvc:resources location="WEB-INF/images/" mapping="/images/**"/>--> <mvc:resources location="/static/" mapping="/static/**"/> <!--处理文件的上传下载--> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 必须和用户JSP 的pageEncoding属性一致,以便正确解析表单的内容 --> <property name="defaultEncoding" value="UTF-8"></property> <!-- 文件最大大小(字节) 1024*1024*50=50M--> <property name="maxUploadSize" value="52428800"></property> <!--resolveLazily属性启用是为了推迟文件解析,以便捕获文件大小异常--> <property name="resolveLazily" value="true"/> </bean> <!--配置拦截器--> <mvc:interceptors> <bean class="com.xy.interceptor.LoginInterceptor"></bean> </mvc:interceptors> <!--2) 多拦截器(拦截器链)--> <!--<mvc:interceptors>--> <!--<mvc:interceptor> <mvc:mapping path="/**"/> <bean class="com.xy.interceptor.OneInterceptor"/> </mvc:interceptor> <mvc:interceptor> <mvc:mapping path="/hpjy/**"/> <bean class="com.xy.interceptor.TwoInterceptor"/> </mvc:interceptor> </mvc:interceptors>--> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJackson2HttpMessageConverter"/> </list> </property> </bean> <bean id="mappingJackson2HttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <!--处理中文乱码以及避免IE执行AJAX时,返回JSON出现下载文件--> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> <value>text/json;charset=UTF-8</value> <value>application/json;charset=UTF-8</value> </list> </property> </bean> <!--处理controller层发送请求到biz,会经过切面的拦截处理--> <aop:aspectj-autoproxy/> </beans>
编写JsonController
package com.xy.web; import com.xy.biz.hpjyBiz; import com.xy.biz.hpjyBiz; import com.xy.model.hpjy; import com.xy.utils.PageBean; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.RestController; import javax.servlet.http.HttpServletRequest; import java.util.HashMap; import java.util.List; import java.util.Map; /** * @author小李飞刀 * @site www.javaxl.com * @company xxx公司 * @create 2022-08-17 9:41 */ //@ResponseBody //@Controller @RestController @RequestMapping("/hpjy/json") public class JsonController { @Autowired private hpjyBiz hpjyBiz; /** * 返回List<T> * @param req * @param hpjy * @return */ // @ResponseBody @RequestMapping("/list") public List<hpjy> list(HttpServletRequest req, hpjy hpjy){ PageBean pageBean = new PageBean(); pageBean.setRequest(req); List<hpjy> lst = this.hpjyBiz.listPager(hpjy, pageBean); return lst; } /** * 返回T * @param req * @param hpjy * @return */ // @ResponseBody @RequestMapping("/load") public hpjy load(HttpServletRequest req, hpjy hpjy){ if(hpjy.getId() != null){ List<hpjy> lst = this.hpjyBiz.listPager(hpjy, null); return lst.get(0); } return null; } /** * 返回List<Map> * @param req * @param hpjy * @return */ // @ResponseBody @RequestMapping("/mapList") public List<Map> mapList(HttpServletRequest req, hpjy hpjy){ PageBean pageBean = new PageBean(); pageBean.setRequest(req); List<Map> lst = this.hpjyBiz.mapListPager(hpjy, pageBean); return lst; } /** * 返回Map * @param req * @param hpjy * @return */ // @ResponseBody @RequestMapping("/mapLoad") public Map mapLoad(HttpServletRequest req, hpjy hpjy){ if(hpjy.getId() != null){ List<Map> lst = this.hpjyBiz.mapListPager(hpjy, null); return lst.get(0); } return null; } // @ResponseBody @RequestMapping("/all") public Map all(HttpServletRequest req, hpjy hpjy){ PageBean pageBean = new PageBean(); pageBean.setRequest(req); List<hpjy> lst = this.hpjyBiz.listPager(hpjy, pageBean); Map map = new HashMap(); map.put("lst",lst); map.put("pageBean",pageBean); return map; } // @ResponseBody @RequestMapping("/jsonStr") public String jsonStr(HttpServletRequest req, hpjy hpjy){ return "hpjyEdit"; } }
编写Sql语句
测试结果
// @ResponseBody
@RequestMapping("/load")
public hpjy load(HttpServletRequest req, hpjy hpjy){
if(hpjy.getId() != null){
List<hpjy> lst = this.hpjyBiz.listPager(hpjy, null);
return lst.get(0);
}
return null;
}
测试结果如下:
/**
* 返回List<Map>
* @param req
* @param hpjy
* @return
*/
// @ResponseBody
@RequestMapping("/mapList")
public List<Map> mapList(HttpServletRequest req, hpjy hpjy){
PageBean pageBean = new PageBean();
pageBean.setRequest(req);
List<Map> lst = hpjyBiz.mapListPager(hpjy, pageBean);
return lst;
}
测试结果如下:
/**
* 返回Map
* @param req
* @param hpjy
* @return
*/
// @ResponseBody
@RequestMapping("/mapLoad")
public Map mapLoad(HttpServletRequest req, hpjy hpjy){
if(hpjy.getId() != null){
List<Map> lst = this.hpjyBiz.mapListPager(hpjy, null);
return lst.get(0);
}
return null;
}
测试结果如下:
// @ResponseBody
@RequestMapping("/all")
public Map all(HttpServletRequest req, hpjy hpjy){
PageBean pageBean = new PageBean();
pageBean.setRequest(req);
List<hpjy> lst = this.hpjyBiz.listPager(hpjy, pageBean);
Map map = new HashMap();
map.put("lst",lst);
map.put("pageBean",pageBean);
return map;
}
测试结果如下:
// @ResponseBody
@RequestMapping("/jsonStr")
public String jsonStr(HttpServletRequest req, hpjy hpjy){
return "hpjyEdit";
}
测试结果如下:
json转换的注解
测试结果(@JsonIgnore)
(注:隐藏想要隐藏的)
三.全局异常处理机制
为什么要全局异常处理
我们知道,系统中异常包括:编译时异常和运行时异常RuntimeException,前者通过捕获异常从而获取异常信息,后者主要通过规范代码开发、测试通过手段减少运行时异常的发生。在开发中,不管是dao层、service层还是controller层,都有可能抛出异常,在springmvc中,能将所有类型的异常处理从各处理过程解耦出来,既保证了相关处理过程的功能较单一,也实现了异常信息的统一处理和维护。
异常处理思路
自写一个错误代码
输出结果
异常处理方式(一)
在Spring-Mvc.xml中写异常处理方式
新建一个erreo.jsp
(注:获取异常的xx)
输出结果
异常处理(二)
编写GlobalException类
package com.xy.exception; public class GlobalException extends RuntimeException { public GlobalException() { } public GlobalException(String message) { super(message); } public GlobalException(String message, Throwable cause) { super(message, cause); } public GlobalException(Throwable cause) { super(cause); } public GlobalException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); } }
编写全局异常处理类GlobalExceptionHandler
package com.xy.component; import com.xy.exception.GlobalException; import org.springframework.stereotype.Component; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; //全局异常处理类 @Component public class GlobalExceptionHandler implements HandlerExceptionResolver { @Override public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) { ModelAndView mv = new ModelAndView(); mv.setViewName("error"); if (e instanceof GlobalException){ GlobalException globalException = (GlobalException) e; mv.addObject("ex",globalException.getMessage()); mv.addObject("msg","全局异常...."); }else if (e instanceof RuntimeException){ RuntimeException runtimeException = (RuntimeException) e; mv.addObject("ex",runtimeException.getMessage()); mv.addObject("msg","运行时异常...."); }else { mv.addObject("ex",e.getMessage()); mv.addObject("msg","其他异常...."); } return mv; } }
在error.jsp中编写
在JsonController类编写异常
测试结果
异常处理(三)
编写GlobalExceptionResolver类
package com.xy.component; import com.xy.exception.GlobalException; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import java.util.HashMap; import java.util.Map; @ControllerAdvice public class GlobalExceptionResolver { // 返回错误json数据 @ResponseBody @ExceptionHandler public Map handler(Exception e){ Map map = new HashMap(); if (e instanceof GlobalException){ GlobalException globalException = (GlobalException) e; map.put("ex",globalException.getMessage()); map.put("msg","全局异常...."); }else if (e instanceof RuntimeException){ RuntimeException runtimeException = (RuntimeException) e; map.put("ex",runtimeException.getMessage()); map.put("msg","运行时异常...."); }else { map.put("ex",e.getMessage()); map.put("msg","其它异常...."); } return map; }
测试结果
重新编写GlobalExceptionResolver类
package com.xy.component; import com.xy.exception.GlobalException; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import java.util.HashMap; import java.util.Map; @ControllerAdvice public class GlobalExceptionResolver { // 跳转错误页面 @ExceptionHandler public ModelAndView handler(Exception e) { ModelAndView mv = new ModelAndView(); mv.setViewName("error"); if (e instanceof GlobalException) { GlobalException globalException = (GlobalException) e; mv.addObject("ex", globalException.getMessage()); mv.addObject("msg", "全局异常...."); } else if (e instanceof RuntimeException) { RuntimeException runtimeException = (RuntimeException) e; mv.addObject("ex", runtimeException.getMessage()); mv.addObject("msg", "运行时异常...."); } return mv; }
测试结果