Spring MVC异常处理实例
以下内容引用自http://wiki.jikexueyuan.com/project/spring/mvc-framework/spring-exception-handling-example.html：
例子：
pom.xml：
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.jsoft.testspring</groupId> <artifactId>testexception</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>testexception Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- Servlet Library --> <!-- http://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <!-- Spring Core --> <!-- http://mvnrepository.com/artifact/org.springframework/spring-core --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.1.4.RELEASE</version> </dependency> <!-- Spring Web --> <!-- http://mvnrepository.com/artifact/org.springframework/spring-web --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.1.4.RELEASE</version> </dependency> <!-- Spring Web MVC --> <!-- http://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.1.4.RELEASE</version> </dependency> </dependencies> <build> <finalName>testexception</finalName> <plugins> <!-- Config: Maven Tomcat Plugin --> <!-- http://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin --> <!-- http://tomcat.apache.org/maven-plugin-2.0/tomcat7-maven-plugin/plugin-info.html --> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <!-- Config: contextPath and Port (Default:8080) --> <!-- <configuration> <path>/</path> <port>8899</port> </configuration> --> </plugin> <!-- Config: Maven Jetty Plugin --> <!-- http://mvnrepository.com/artifact/org.mortbay.jetty/jetty-maven-plugin --> <!-- http://www.eclipse.org/jetty/documentation/current/jetty-maven-plugin.html --> <plugin> <groupId>org.eclipse.jetty</groupId> <artifactId>jetty-maven-plugin</artifactId> <version>9.4.3.v20170317</version> <!-- Config: contextPath and Port (Default:8080) --> <!-- <configuration> <httpConnector> <port>8899</port> </httpConnector> <webAppConfig> <contextPath>/</contextPath> </webAppConfig> </configuration> --> </plugin> </plugins> </build> </project>
web.xml：
<web-app id="WebApp_ID" version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <display-name>Spring MVC Application</display-name> <servlet> <servlet-name>spring-mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 默认：[servlet-name]-servlet.xml --> <!-- 通过初始化参数，指定xml文件的位置 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/springmvc-context.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring-mvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
springmvc-context.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" 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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <context:component-scan base-package="com.jsoft.testspring"/> <context:annotation-config/> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix"> <value>/WEB-INF/jsp/</value> </property> <property name="suffix"> <value>.jsp</value> </property> </bean> <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <property name="exceptionMappings"> <props> <prop key="com.jsoft.testspring.testexception.SpringException"> ExceptionPage </prop> </props> </property> <property name="defaultErrorView" value="error" /> </bean> </beans>
说明：指定ExceptionPage作为一个异常视图，当SpringException发生时触发，另外，如果有任何其他类型的异常发生，通用的视图error就会触发。
Student.java：
package com.jsoft.testspring.testexception; public class Student { private Integer age; private String name; private Integer id; public void setAge(Integer age) { this.age = age; } public Integer getAge() { return age; } public void setName(String name) { this.name = name; } public String getName() { return name; } public void setId(Integer id) { this.id = id; } public Integer getId() { return id; } }
SpringException.java：
package com.jsoft.testspring.testexception; public class SpringException extends RuntimeException { private String exceptionMsg; public SpringException(String exceptionMsg) { this.exceptionMsg = exceptionMsg; } public String getExceptionMsg() { return this.exceptionMsg; } public void setExceptionMsg(String exceptionMsg) { this.exceptionMsg = exceptionMsg; } }
StudentController.java：
package com.jsoft.testspring.testexception; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.servlet.ModelAndView; @Controller public class StudentController { @RequestMapping(value = "/student", method = RequestMethod.GET) public ModelAndView student() { return new ModelAndView("student", "command", new Student()); } @RequestMapping(value = "/addStudent", method = RequestMethod.POST) @ExceptionHandler({ SpringException.class }) public String addStudent(Student student, ModelMap model) { if (student.getName().length() < 5) { throw new SpringException("Given name is too short"); } else { model.addAttribute("name", student.getName()); } if (student.getAge() < 10) { throw new SpringException("Given age is too low"); } else { model.addAttribute("age", student.getAge()); } model.addAttribute("id", student.getId()); return "result"; } }
student.jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%> <html> <head> <title>Spring MVC Exception Handling</title> </head> <body> <h2>Student Information</h2> <form:form method="POST" action="addStudent"> <table> <tr> <td><form:label path="name">Name</form:label></td> <td><form:input path="name" /></td> </tr> <tr> <td><form:label path="age">Age</form:label></td> <td><form:input path="age" /></td> </tr> <tr> <td><form:label path="id">id</form:label></td> <td><form:input path="id" /></td> </tr> <tr> <td colspan="2"> <input type="submit" value="Submit"/> </td> </tr> </table> </form:form> </body> </html>
result.jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>Spring MVC Form Handling</title> </head> <body> <h2>Submitted Student Information</h2> <table> <tr> <td>Name</td> <td>${name}</td> </tr> <tr> <td>Age</td> <td>${age}</td> </tr> <tr> <td>ID</td> <td>${id}</td> </tr> </table> </body> </html>
ExceptionPage.jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>Spring MVC Exception Handling</title> </head> <body> <h2>Spring MVC Exception Handling</h2> <h3>${exception.exceptionMsg}</h3> </body> </html>
error.jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>Spring Error Page</title> </head> <body> <p>An error occured, please contact webmaster.</p> </body> </html>
测试工程：https://github.com/easonjim/5_java_example/tree/master/springtest/test19/testexception
