代码如下：
1.SpringMVC的web.xml文件：（DispatcherServlet配置）
<?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">
<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-servlet.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>
</web-app>
2.SpringMVC的配置文件 （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: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">
<!--包的自动扫描-->
<context:component-scan base-package="com.xbf.controller"/>
<!--静态资源过滤 SpringMVC不处理静态资源-->
<mvc:default-servlet-handler/>
<!--注解驱动-->
<mvc:annotation-driven/>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
3.Controller层的编写：
package com.xbf.controller;
import com.xbf.pojo.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
@Controller
public class UserController {
@RequestMapping("/t1/{name}")
//restful风格
//前端请求参数名和处理的参数名一致时
//可以直接拿过来用
//String name就是前端请求的参数名
public String test1(@PathVariable String name, Model model){
model.addAttribute("aaa",name);
return "user";
}
@RequestMapping("/t2")
//前端传递过来的参数名和控制器进行处理的参数名不一致时
//使用 @RequestPara 注解进行解释说明
// username：前端传递过来的参数名
// name：控制器进行处理的参数名
public String test2(@RequestParam(value = "username") String name,Model model){
model.addAttribute("aaa",name);
return "user";
}
@RequestMapping("/t3")
//研究对象的传递
//使用set方法给属性设置值，若没有传值就为默认值，设值前判断属性名是否一致呢？？？
//会将前端传递过来的对象属性属性值对自动封装成对象 （user）
public String test3(User user,Model model){
System.out.println(user);
model.addAttribute("user",user);
return "user";
}
@RequestMapping("/t333/{id}/{name}/{age}")
//restful风格
public String test33(User user,Model model){
System.out.println(user);
model.addAttribute("user",user);
return "user";
}
@RequestMapping("/t33/{id}/{name}/{age}")
//restful风格
public String test33(@PathVariable int id,@PathVariable String name,@PathVariable int age,Model model){
User user = new User();
user.setName(name);
user.setId(id);
user.setAge(age);
System.out.println(user);
model.addAttribute("user",user);
return "user";
}
}
4.前端页面 （user.jsp）
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
${aaa}
<hr>
<p>
姓名：${user.getName()}
ID：${user.getId()}
年龄：${user.getAge()}
</p>
</body>
</html>
pojo实体类：
package com.xbf.pojo;
public class User {
private int id;
private String name;
private int age;
public User() {
}
public User(int id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name=‘" + name + ‘\‘‘ +
", age=" + age +
‘}‘;
}
}
总结： DispatcherServlet将拦截的前端请求分发给某个具体的控制器，由控制器进行模型数据处理并返回。
原文地址：https://www.cnblogs.com/xbfchder/p/11324520.html
时间： 2024-11-01 09:24:29