我是 Spring Mvc 的初学者。 我已经使用 BeanNameUrlHandlerMapping 。 完成所有映射后，当我从 url 调用页面时，会发生 404 错误。 我将如何解决这个问题。
spring-dispatcher-servlet.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
"http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<!-- Default hander mapping -->
<!-- handler -->
<bean id="HandlerMapping" class=" org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
<!-- controller -->
<bean name="/hello.html" class="main.Hellocontroller"></bean>
<!-- View Reserver -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
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>Spring</display-name>
<!-- Default Configuration -->
<servlet>
<servlet-name>spring-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>spring-dispatcher</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
Hellocontroller.java
主包；
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 {
// TODO Auto-generated method stub
ModelAndView mdvAndView=new ModelAndView("Hellopage");
mdvAndView.addObject("messege","Welcome .View this page");
return mdvAndView;
}
}
Hellopage.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1>Hiiii</h1>
<h1>
${messege}
</h1>
</body>
</html>
最佳答案
我试图通过修改您的代码来使事情变得清晰。
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
"http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<context:component-scan base-package="com.example.springmvc" /> <!-- base package where spring will scan for Component like Controller,Service,Repository etc-->
<mvc:annotation-driven/>
<!-- View Reserver -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
你的jsp页面应该在WEB-INF目录中。请注意，前缀应该是“/WEB-INF/”而不是“/WEB-INF”
您的 web.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Spring</display-name>
<!-- Default Configuration -->
<servlet>
<servlet-name>spring-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>spring-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
你的 Controller
@Controller
public class HelloController {
@RequestMapping(value = {"/","/home"})
public String index(){
return "index";
}
@RequestMapping(value = {"/welcome"})
public String index(ModelMap model){
model.addAttribute("message","Welcome to Web Application!");
return "Hellopage";
}
}
index.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Index</title>
</head>
<body>
<h1>Home Page </h1>
<a href="${pageContext.servletContext.contextPath}/welcome">Click Here</a>
</body>
</html>
Hellopage.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>Hello Page</title>
</head>
<body>
<h1>Hello Page </h1>
${requestScope.message}
</body>
</html>
确保您的 jsp 页面位于 WEB-INF 目录中。
关于java - 为什么 org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping 不起作用？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39265870/