<dependencies>
    <!-- SpringMVC -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.3.1</version>
    </dependency>

    <!-- 日志 -->
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.2.3</version>
    </dependency>

    <!-- ServletAPI -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
        <scope>provided</scope>
    </dependency>

    <!-- Spring5和Thymeleaf整合包 -->
    <dependency>
        <groupId>org.thymeleaf</groupId>
        <artifactId>thymeleaf-spring5</artifactId>
        <version>3.0.12.RELEASE</version>
    </dependency>
</dependencies>

<servlet>
    <servlet-name>springMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>springMVC</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<!-- 配置SpringMVC的前端控制器，對瀏覽器發(fā)送的請求統(tǒng)一進行處理 -->
<servlet>
    <servlet-name>springMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 通過初始化參數(shù)指定SpringMVC配置文件的位置和名稱 -->
    <init-param>
        <!-- contextConfigLocation為固定值 -->
        <param-name>contextConfigLocation</param-name>
        <!-- 使用classpath:表示從類路徑查找配置文件，例如maven工程中的src/main/resources -->
        <param-value>classpath:springMVC.xml</param-value>
    </init-param>
    <!-- 
 		作為框架的核心組件，在啟動過程中有大量的初始化操作要做
		而這些操作放在第一次請求時才執(zhí)行會嚴重影響訪問速度
		因此需要通過此標簽將啟動控制DispatcherServlet的初始化時間提前到服務(wù)器啟動時
	-->
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>springMVC</servlet-name>
    <!--
        設(shè)置springMVC的核心控制器所能處理的請求的請求路徑
        /所匹配的請求可以是/login或.html或.js或.css方式的請求路徑
        但是/不能匹配.jsp請求路徑的請求
    -->
    <url-pattern>/</url-pattern>
</servlet-mapping>

@Controller
public class HelloController {
    
}

<?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/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 自動掃描包 -->
    <context:component-scan base-package="com.blumson.mvc.controller"></context:component-scan>

    <!-- 配置Thymeleaf視圖解析器 -->
    <bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/>
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
                <property name="templateResolver">
                    <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">

                        <!-- 視圖前綴 -->
                        <property name="prefix" value="/WEB-INF/templates/"/>

                        <!-- 視圖后綴 -->
                        <property name="suffix" value=".jsp"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8" />
                    </bean>
                </property>
            </bean>
        </property>
    </bean>

    <!--
       處理靜態(tài)資源，例如html、js、css、jpg
      若只設(shè)置該標簽，則只能訪問靜態(tài)資源，其他請求則無法訪問
      此時必須設(shè)置<mvc:annotation-driven/>解決問題
     -->
    <mvc:default-servlet-handler/>

    <!-- 開啟mvc注解驅(qū)動 -->
    <mvc:annotation-driven>
        <mvc:message-converters>
            <!-- 處理響應(yīng)中文內(nèi)容亂碼 -->
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="defaultCharset" value="UTF-8" />
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html</value>
                        <value>application/json</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

</beans>

// @RequestMapping注解：處理請求和控制器方法之間的映射關(guān)系
// @RequestMapping注解的value屬性可以通過請求地址匹配請求，/表示的當前工程的上下文路徑
// localhost:8080/springMVC/
@RequestMapping("/")
public String index() {
    //設(shè)置視圖名稱
    return "index";
}

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>first</h1>
</body>
</html>

 @RequestMapping("/target")
    public String target(){
        return "target";
    }

@RequestMapping(
        value = {"/testRequestMapping", "/test"}
)
public String testRequestMapping(){
    return "success";
}

@RequestMapping(
        value = {"/testRequestMapping", "/test"},
        method = {RequestMethod.GET, RequestMethod.POST}
)
public String testRequestMapping(){
    return "success";
}

@RequestMapping(
        value = {"/testRequestMapping", "/test"}
        ,method = {RequestMethod.GET, RequestMethod.POST}
        ,params = {"username","password!=123456"}
)
public String testRequestMapping(){
    return "success";
}

@RequestMapping("/testRest/{id}/{username}")
public String testRest(@PathVariable("id") String id, @PathVariable("username") String username){
    System.out.println("id:"+id+",username:"+username);
    return "success";
}
//最終輸出的內(nèi)容為-->id:1,username:admin

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.1</version>
</dependency>

<mvc:annotation-driven />

@RequestMapping("/json")
@ResponseBody
public User testResponseUser(){
    User user = new User();
        user.setId(1001);
        user.setUsername("admin");
        user.setPassword("123456");
        user.setAge(23);
        user.setSex("男");
        return user;
}