SpringMVC

1.web.xml需配置

　　

<!-- 配置DispatcherServlet -->
  <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      
　　<!-- 
　　　　<init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc.xml</param-value>
      </init-param>

　　-->

      <load-on-startup>1</load-on-startup>
  </servlet>
  
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>

2.springmvc-servlet.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"
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="org.springframework.samples.petclinic.web"/>
<!-- 配置自动扫描的包 -->
<context:component-scan base-package="com.finn.web"/>

<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/views/"></property>
    <property name="suffix" value=".jsp"></property>
</bean>    
    
</beans>

 

1.@RequestMapping除了修饰方法，还可以来修饰类
类定义处:提供初步的请求映射信息。相对于WEB应用的根目录
方法处:若类定义处未标注@RequestMapping,则方法处标记的URL相对于WEB应用的根目录
2.@RequestMapping的value,method
@RequestMapping(value="/mappingmethod",method=RequestMethod.POST)
public String MappingPost(){
System.out.println("22222");
return SUCCESS;
}
@RequestMapping的params,headers
@RequestMapping(value="/mappingmethod",params={"username","age!=10"}) 必须包含username参数，并且age的值不等于10
3.@PathVaiable可以映射URL中的占位符到目标方法的参数中
@RequestMapping("/pathvaiable/{id}")
public String PathVariable(@PathVariable("id") Integer id){
System.out.println("PathVariable"+id);
return SUCCESS;
}
4.REST:资源表现层状态转化.PUT、DELETE、GET、POST
5.HiddenHttpMethodFilter
先配置到web.xml中,作用可以把POST请求转成PUT和 DELETE请求
<!-- 配置HiddenHttpMethodFilter -->
<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>

<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

控制器
@RequestMapping(value="/testRest/{id}",method=RequestMethod.DELETE)
public String testRest(@PathVariable("id") Integer id){
System.out.println("DELETE"+id);
return SUCCESS;
}
页面上
<form action="springmvc/testRest/1" method="post">
<input type="hidden" name="_method" value="DELETE"/>
<input type="submit" value="REST DELETE" />
</form>