创建好一个SpringMVC项目后，需要在需要在WB-INF文件夹下配置web.xml文件
<?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>SpringMVCdemo</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!--加载springMVC的配置文件-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:springMVC.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<!--中央核心控制器-->
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<!--请求-->
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<!--过滤器，编码格式-->
<filter>
<filter-name>characterEncodingFilter</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>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
在src文件夹下创建springMVC.xml文件
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.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">
<!--自动扫描上下文包-->
<context:component-scan base-package="cn.zhc.*"></context:component-scan>
<!--自动开启MVC模式注解-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--将请求映射到标注@RequestMapping注解的控制器和处理方法上-->
<mvc:default-servlet-handler></mvc:default-servlet-handler>
<!--视图解析器-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--前缀后缀-->
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>$Title$</title> </head> <body> 哈哈哈哈哈 </body> </html>
测试类：
package cn.zhc.test;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class Test {
@RequestMapping("/hello.do")
public String hello(){
System.out.println("hhhhhhhhhhhh");
return "index";
}
}
在项目运行后，在前端页面路径后输入/hello.do，控制台会输出hhhhhhhhhhhh
view到controller 四种方式
@RequestMapping("/hello.do")
public String hello(String name){
//路径后加?name= 不加会传null
System.out.println(name);
return "index";
}
//Controller方法方法中参数前加@RequestParam进行直接入参
@RequestMapping("/hello.do")
public String hello(@RequestParam String name){
//不传参会请求错误400
System.out.println(name);
return "index";
}
@RequestMapping("/hello.do")
public String hello(@RequestParam(value = "name" ,required = false) String name){
//required是否需要传参
System.out.println(name);
return "index";
}
@RequestMapping(value = "/hello.do",method = RequestMethod.GET,params = "name")
public String hello(String name){
//不传参会请求错误400
System.out.println(name);
return "index";
}
controller到view 三种方式
@RequestMapping("/hello.do")
public ModelAndView hello(){
ModelAndView mv = new ModelAndView();
mv.addObject("name","zhu");//添加模型数据
mv.setViewName("index");//设置视图名称
return mv;
}
@RequestMapping("/hello.do")
public String hello(Model model){
model.addAttribute("name","huai");
model.addAttribute("chang");
//在model中若不指定key，则使用默认对象的类型作为key
return "index";
}
@RequestMapping("/hello.do")
public String hello(Map<String,Object> map){
map.put("name","lisa");
return "index";
}
