今天接触SSM框架的第四天,后台Mybatis生成dao、entity和mapper后,测试成功,能够正常读写数据库了,但是,在加入页面之后,通过controller不能实现页面的跳转,特求助~~
访问情况:
点击跳转后,
出现404的错误,个人认为,可能是没有找到controller
代码:
messageController.java
@Controller
public class messageController {
@RequestMapping("/message/go")
public String gotest(){
return "second";
}
}
index.jsp
<%@page contentType="text/html; charset=UTF-8" language="java" %>
<html>
<head>
<title>首页</title>
</head>
<body>
<h2>Hello World!</h2>
<a href="/message/go">点击跳转</a>
<p id="test">Hello World!</p>
<button type="button" onclick="selectUser()">onclick test</button>
</body>
</html>
reach.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>跳到这里了</title>
</head>
<body>
跳转成功!!!
</body>
</html>
文件路径:
SpringMVC的配置
<?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:beans="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
<!-- ①:top.xiaofeng包中的所有类进行扫描,以完成Bean创建和自动依赖注入的功能 -->
<context:component-scan base-package="top.xiaofeng"/>
<mvc:annotation-driven/>
<!-- 静态资源访问 -->
<!--如果webapp下你新建了文件夹,想访问里面的静态资源,那么就要在这配置一下-->
<mvc:resources location="/img/" mapping="/img/**"/>
<mvc:resources location="/css/" mapping="/css/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<!-- ②:启动Spring MVC的注解功能,完成请求和注解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter"/>
</list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
<!-- 配置视图解析器,把控制器的逻辑视频映射为真正的视图 -->
<!-- /WEB-INF/views/second.jsp -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- 拦截器 -->
<mvc:interceptors>
<!-- 国际化操作拦截器 如果采用基于(请求/Session/Cookie)则必需配置 -->
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"/>
</mvc:interceptors>
<!-- 定义无Controller的path<->view直接映射 -->
<!-- <mvc:view-controller path="/" view-name="redirect:/" /> -->
</beans>
web.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>mydemo</display-name>
<!-- 配置编码方式-->
<filter>
<filter-name>encodingFilter</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>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 配置springmvc的前端控制器 指向spring-mvc.xml 程序在启动的时候就加载springmvc 可以接受所有请求
load-on-startup:表示启动容器时初始化该Servlet; -->
<servlet>
<servlet-name>springServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 可以自定义servlet.xml配置文件的位置和名称,
默认为WEB-INF目录下,名称为[<servlet-name>]-servlet.xml,如spring-servlet.xml -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 将前端URL请求和后台处理方法controller建立对应关系-->
<servlet-mapping>
<servlet-name>springServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 取消对某一类文件的拦截-->
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.md</url-pattern>
</servlet-mapping>
<!-- Spring配置 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/applicationContext.xml</param-value>
</context-param>
<!-- 欢迎页面-->
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
<!--<!–404错误展示页面–>-->
<!--<error-page>-->
<!--<error-code>404</error-code>-->
<!--<location>/404.jsp</location>-->
<!--</error-page>-->
<!--设置session失效时间为30分钟 -->
<session-config>
<session-timeout>600</session-timeout>
</session-config>
</web-app>