以下示例顯示如何使用Spring Web MVC框架使用控制器類名稱處理程序映射。 ControllerClassNameHandlerMapping
類是基于約定的處理程序映射類,它將URL請(qǐng)求映射到配置中提到的控制器的名稱。這個(gè)類接受控制器名稱并將其轉(zhuǎn)換為帶有前導(dǎo)“/
”的小寫(xiě)形式。 例如HelloController
映射到URL: “/hello*
”。
所下所示配置 -
<beans>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
<bean class="com.yiibai.springmvc.HelloController" />
<bean class="com.yiibai.springmvc.WelcomeController"/>
</beans>
例如,使用上面的配置,URI:
/helloWorld.html
或 /hello{任何字母}.html
,DispatcherServlet
將請(qǐng)求轉(zhuǎn)發(fā)到HelloController
類。/welcome.html
,DispatcherServlet
會(huì)將請(qǐng)求轉(zhuǎn)發(fā)給WelcomeController
類。/welcome1.html
,DispatcherServlet
將不會(huì)找到任何控制器,服務(wù)器將拋出404
狀態(tài)錯(cuò)誤。首先,讓我們使用Eclipse IDE,并按照以下步驟使用Spring Web Framework開(kāi)發(fā)基于動(dòng)態(tài)表單的Web應(yīng)用程序:
com.yiibai.springmvc
包下創(chuàng)建兩個(gè)Java類HelloController
和 WelcomeController
。jsp
子文件夾下創(chuàng)建兩個(gè)視圖文件:hello.jsp
和 welcome.jsp
。完整的項(xiàng)目文件目錄結(jié)構(gòu)如下所示 -
HelloController.java 的代碼如下所示 -
package com.yiibai.springmvc;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;
public class HelloController extends AbstractController{
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView model = new ModelAndView("hello");
model.addObject("message", "Hello World!");
return model;
}
}
WelcomeController.java 的代碼如下所示 -
package com.yiibai.springmvc;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;
public class WelcomeController extends AbstractController{
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView model = new ModelAndView("welcome");
model.addObject("message", "Welcome!");
return model;
}
}
ControllerClassNameHandlerMapping-servlet.xml 的代碼如下所示 -
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<bean
class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" />
<bean class="com.yiibai.springmvc.HelloController" />
<bean class="com.yiibai.springmvc.WelcomeController" />
</beans>
hello.jsp 的代碼如下所示 -
<%@ page contentType="text/html; charset=UTF-8" %>
<html>
<head>
<title>Hello World</title>
</head>
<body>
<h2>${message}</h2>
</body>
</html>
welcome.jsp 的代碼如下所示 -
<%@ page contentType="text/html; charset=UTF-8" %>
<html>
<head>
<title>Welcome</title>
</head>
<body>
<h2>${message}</h2>
</body>
</html>
完成創(chuàng)建源和配置文件后,發(fā)布應(yīng)用程序到Tomcat服務(wù)器。
現(xiàn)在啟動(dòng)Tomcat服務(wù)器,現(xiàn)在嘗試訪問(wèn)URL => http://localhost:8080/ControllerClassNameHandlerMapping/helloWorld.html ,如果Spring Web應(yīng)用程序沒(méi)有問(wèn)題,應(yīng)該看到以下結(jié)果:
當(dāng)訪問(wèn)URL => http://localhost:8080/ControllerClassNameHandlerMapping/hello.html , 如果Spring Web應(yīng)用程序沒(méi)有問(wèn)題,應(yīng)該看到以下結(jié)果:
當(dāng)訪問(wèn)URL => http://localhost:8080/ControllerClassNameHandlerMapping/welcome.html , 如果Spring Web應(yīng)用程序沒(méi)有問(wèn)題,應(yīng)該看到以下結(jié)果:
當(dāng)訪問(wèn)URL => http://localhost:8080/ControllerClassNameHandlerMapping/Welcome.html , 如果Spring Web應(yīng)用程序沒(méi)有問(wèn)題,因此沒(méi)有匹配此請(qǐng)求URL, 應(yīng)該會(huì)看到以下結(jié)果: