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RequestMapping请求方式
发布时间：2022-08-15 18:40:06编辑：admin阅读（714）
1、@RequestMapping除了可以使用请求URL映射请求外，还可以使用请求方法、请求参数以及请求头映射请求
2、@RequestMapping的value、method、params与headers分别表示请求URL、请求方法、请求参数及请求偷的映射条件，他们之间是与的关系，聚合使用多个条件可让请求映射更加精确化
3、params与headers支持简单的表达式：
param1：表示请求必须包含名为param1的请求参数
!param1：表示请求不能包含名为param1的请求参数
param1!=value1：表示请求包含名为param1的请求参数，但其值不能为value1
{‘param1’=value1,param2}：请求必须包含名为param1和param2的两个请求参数，且param1参数的值必须为value1
4、实例代码：
（1）index.jsp代码
<body>
<a href="helloworld">Hello World</a>
<br><br>
<a href="springmvc/testRequestMapping">testRequestMapping</a>
<br><br>
<form action="springmvc/testMethod" method="post">
<input type="submit" value="submit">
</form>
<br><br>
<a href="springmvc/testParamsAndHeaders?username=atguigu&age=11">testParamsAndHeaders</a>
</body>
（2）web.xml代码
<?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_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>sspringmvc4</display-name>
<!-- The front controller of this Spring Web application, responsible for handling all application requests -->
<servlet>
<servlet-name>springDispatcherServlet</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>
<!-- Map all requests to the DispatcherServlet for handling -->
<servlet-mapping>
<servlet-name>springDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
（3）配置springmvc.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: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-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd">
<!--配置自定义扫描的包 -->
<context:component-scan base-package="com.atguigu.springmvc"></context:component-scan>
<!--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>
（4）配置控制器响应类
package com.atguigu.springmvc.handlers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@RequestMapping("/springmvc")
@Controller
public class SpingMVCTest {
private static final String SUCCESS="success";
@RequestMapping("/testRequestMapping")
public String testRequestMapping() {
System.out.println("testRequestMapping");
return SUCCESS;
}
@RequestMapping(value="/testMethod",method=RequestMethod.POST)
public String testMethod() {
System.out.println("testMethod");
return SUCCESS;
}
/*params参数*/
@RequestMapping(value="testParamsAndHeaders",params= {"username","age!=10"},headers = {"Accept-Language=zh-CN,zh;q=0.9,en;q=0.8"})
public String testParamsAndHeaders() {
System.out.println("testParamsAndHeaders");
return SUCCESS;
}
}
关键字词：请求方式