注解和XML配置方式同时存在时，注解失效
前面使用了XML配置的方式进行springmvc的测试，一切正常。
后面使用注解做另一个测试，开启了组件扫描。注解配置正常。但是请求路径没办法被注解捕获。
后面把之前xml方式配置的内容注释掉了，请求就可以正常捕获了。
请老师解释下原因。
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在配置SpringMVC的访问路径时，如果在SpringMVC的配置文件中通过bean的方式配置访问路径，又同时使用注解，会使得程序的运行结果存在问题；
与这个问题类似的问题：我们在学习Servlet时，如果既使用配置文件又使用注解声明Servlet，那么程序也是会出错的。
祝学习愉快！
程序人生001
2018-08-06 15:59:37
配置文件：mySpringmvc.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | <?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-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="com.imoooc.controller"/> <!--<bean id="handlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">--> <!--<property name="mappings">--> <!--<props>--> <!--<!–<prop key="/login.do">myHandler</prop>–>--> <!--</props>--> <!--</property>--> <!--</bean>--> <bean id="myHandler" class="User"></bean> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"/> <property name="suffix" value=".jsp"/> </bean></beans> |
前端页面：weight.jsp
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | <%-- Created by IntelliJ IDEA. User: Administrator Date: 2018/8/5 0005 Time: 下午 23:26 To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>BMI计算器</title></head><body> <b>计算BMI身体指数</b> <form action="bmi.do" method="post"> 身高: <input type="text" name="height">cm 体重: <input type="text" name="weight">kg <input type="submit" value="提交测试"> </form></body></html> |
showBMI.jsp
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | <%-- Created by IntelliJ IDEA. User: Administrator Date: 2018/8/5 0005 Time: 下午 23:30 To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head> <title>BMI结果</title></head><body> 提示信息：${msg}</body></html> |
web.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | <?xml version="1.0" encoding="utf-8" ?><web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"><display-name>Archetype Created Web Application</display-name> <filter> <filter-name>CharacterEncoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>MySpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--指定配置springmvc.xml文件的路径--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:mySpringmvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>MySpringMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping></web-app> |
实体类:Body
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | package com.imoooc.controller;public class Body { private double height; private double weight; public double getHeight() { return height; } public void setHeight(double height) { this.height = height; } public double getWeight() { return weight; } public void setWeight(double weight) { this.weight = weight; }} |
handler：BMIController
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | package com.imoooc.controller;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.ModelAndView;@Controllerpublic class BMIController { @RequestMapping("/bmi.do") public ModelAndView bmiTest(Body body){ ModelAndView modelAndView = new ModelAndView(); double height = body.getHeight(); double weight = body.getWeight(); System.out.println(height+"-----"+weight); double result = weight/(Math.pow(height/100,2)); System.out.println(height/100); System.out.println(result); String msg = "无fuck可说"; if(result<19){ msg="多吃点，草"; }else if(result<25){ msg="你很棒棒哦"; }else{ msg="胖子"; } modelAndView.addObject("msg",msg); modelAndView.setViewName("showBMI"); return modelAndView; }} |
POM文件没有什么特别的，引入相关jar包就行
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