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Spring MVC多控制器示例
在Spring MVC中，我們可以一次創(chuàng)建多個控制器。必須使用 @Controller 注釋映射每個控制器類。在這里，我們看到了多個控制器的Spring MVC示例。步驟如下:
在Maven中加載spring jar文件或添加依賴項 創(chuàng)建控制器類 在web.xml文件中提供控制器的條目 在單獨的XML文件中定義bean 創(chuàng)建其他視圖組件 啟動服務(wù)器并部署項目
1、將依賴項添加到pom.xml
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.1.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>3.0-alpha-1</version> </dependency>
2、創(chuàng)建請求頁面
讓我們創(chuàng)建一個包含兩個鏈接的簡單JSP頁面。
index.jsp
<html> <body> <a href="hello1">Spring MVC</a> || <a href="hello2">Spring Boot</a> </body> </html>
3、創(chuàng)建控制器類
讓我們創(chuàng)建兩個控制器類，每個控制器類返回特定的視圖頁面。
HelloController1.java
package com.nhooo;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloController1 {
@RequestMapping("/hello1")
public String display()
{
return "viewpage1";
}
}
HelloController2.java
package com.nhooo;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloController2 {
@RequestMapping("/hello2")
public String display()
{
return "viewpage2";
}
}
4、在web.xml文件中提供控制器的條目
web.xml
<?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" id="WebApp_ID" version="3.0"> <display-name>SpringMVC</display-name> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
5、在xml文件中定義Bean
spring-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: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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- Provide support for component scanning --> <context:component-scan base-package="com.nhooo" /> <!--Provide support for conversion, formatting and validation --> <mvc:annotation-driven/> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
6、創(chuàng)建其他視圖組件
viewpage1.jsp
<html> <body> <p>Welcome to Spring MVC Tutorial</p> </body> </html>
viewpage1.jsp
<html> <body> <p>Welcome to Spring Boot Tutorial</p> </body> </html>
輸出:
