Spring整合系列： idea SpringBoot+Mybatis+Thymeleaf

所需的框架：

主要框架：SpringBoot、SpringMVC、Mybatis、Thymeleaf
輔助框架：mysql驅動、Druid數據連接池、Json（阿里）、Lombok

構建項目：

使用開源項目Spring Initializr生成我們所需要的項目基本架構。
進入 https://start.spring.io/ ，並生成項目下載到本地。
解壓下載下來的項目，我這裡解壓到Demo目錄下。
使用IDEA打開項目
選擇自動導入
之後添加我們未能夠在項目構建時所添加到框架，Druid數據連接池、Json（阿里）等。打開Pom.xml文件，在Mvnrepository裡搜索我們要添加的框架。Pom.xml文件（Ps：個人習慣將框架分類，）

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.4.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.moonlit</groupId>
	<artifactId>SpringBootDemo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>SpringBootDemo</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<!-- Spring -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-thymeleaf</artifactId>
		</dependency>
		<!-- Mybatis -->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.0.1</version>
		</dependency>
		
		<!-- MySql -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		<!-- Druid -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.1.16</version>
		</dependency>

		<!-- 阿里Json -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.58</version>
		</dependency>

		<!-- lombok -->
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

因為SpringBoot已經幫我們整合了Spring跟SpringMVC，所以我們比不需要自己去編寫那些配置文件，只需要提供數據庫連接池。

#DataSource
spring.datasource.url=jdbc:mysql://localhost:3306/testssm?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=GMT%2B8
spring.datasource.username=root
spring.datasource.password=qwe123
#Mybatis
mybatis.mapper-locations=classpath:mapper/*.xml
#編碼
server.tomcat.uri-encoding=UTF-8
#devtools
spring.thymeleaf.cache=true
spring.devtools.restart.enabled=true
spring.devtools.restart.additional-paths=src/main/java

項目文件分佈圖
配置entity 直接上代碼 User.java

package com.moonlit.SpringBootDemo.entity;

import lombok.Data;
import org.springframework.stereotype.Repository;

/**
 * @Author: Joshua_Zheng
 * @Date: 2019/5/13 15:08
 * @Email: [email protected]
 * @Version 1.0
 */
@Data
@Repository
public class User {
    private int id;
    private String name;
}

配置業務邏輯層UserService.java與UserServiceImpl.java

package com.moonlit.SpringBootDemo.service;

import com.moonlit.SpringBootDemo.entity.User;

import java.util.List;

/**
 * @Author: Joshua_Zheng
 * @Date: 2019/5/13 15:10
 * @Email: [email protected]
 * @Version 1.0
 */
public interface UserService {
    /**
     * 查詢所有用戶
     * @return
     */
    List<User> listUsers();
}

package com.moonlit.SpringBootDemo.service.impl;

import com.moonlit.SpringBootDemo.dao.UserDao;
import com.moonlit.SpringBootDemo.entity.User;
import com.moonlit.SpringBootDemo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @Author: Joshua_Zheng
 * @Date: 2019/5/13 15:10
 * @Email: [email protected]
 * @Version 1.0
 */
@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserDao userDao;

    @Override
    public List<User> listUsers() {
        return this.userDao.listUsers();
    }
}

數據訪問層：UserDao.java，UserDaoMapper.xml

package com.moonlit.SpringBootDemo.dao;

import com.moonlit.SpringBootDemo.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * @Author: Joshua_Zheng
 * @Date: 2019/5/13 15:12
 * @Email: [email protected]
 * @Version 1.0
 */
@Mapper
@Repository
public interface UserDao {
    /**
     * 查詢所有用戶
     *
     * @return
     */
    List<User> listUsers();
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.moonlit.SpringBootDemo.dao.UserDao">
    <!-- 结果集映射处理-->
    <resultMap id="User" type="com.moonlit.SpringBootDemo.entity.User">
        <result column="id" property="id"/>
        <result column="name" property="name"/>
    </resultMap>

    <select id="listUsers" resultMap="User">
      select * from user;
    </select>
</mapper>

配置Controller層：UserController.java

package com.moonlit.SpringBootDemo.controller;

import com.alibaba.fastjson.JSON;
import com.moonlit.SpringBootDemo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

/**
 * @Author: Joshua_Zheng
 * @Date: 2019/5/13 15:18
 * @Email: [email protected]
 * @Version 1.0
 */
@Controller
public class UserController {
    @Autowired
    private UserService userService;

    /**
     * 1.直接發送請求
     *
     * @return
     */
    @RequestMapping("/list")
    @ResponseBody
    private String listUsers() {
        String users = JSON.toJSONString(this.userService.listUsers());
        return users;
    }

    /**
     * 訪問靜態頁面
     *
     * @return
     */
    @RequestMapping("/lo")
    public String login() {
        /**
         * 因為使用了Thymeleaf。它默認就檢索“/templates/”文件下的資源，
         * 如果要訪問static下的資源就需要重定向
         */
        return "redirect:/login.html";
    }

    /**
     * 訪問動態頁面，並請求數據
     *
     * @return
     */
    @RequestMapping("/Hi")
    public ModelAndView sayHello() {
        ModelAndView modelAndView = new ModelAndView();
        /**
         *  modelAndView.setViewName("hello1")
         *  裡面的參數對應templates文件下的hello.html文件
         */
        modelAndView.setViewName("Hello");
        String users = JSON.toJSONString(this.userService.listUsers());
        modelAndView.addObject("key", users);
        return modelAndView;
    }

}

開啟熱部署
配置SpringBoot啟動文件

package com.moonlit.SpringBootDemo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@SpringBootApplication
@EnableTransactionManagement
@MapperScan("com.moonlit.SpringBootDemo.dao")
public class SpringBootDemoApplication {

	/**
	 * 備註：
	 * EnableTransactionManagement 開啟事務管理
	 * MapperScan 掃描DAO層
	 */

	public static void main(String[] args) {
		SpringApplication.run(SpringBootDemoApplication.class, args);
	}

}

靜態資源頁面與動態資源頁面 login.html與Hello.html
靜態資源

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>靜態資源</title>
</head>
<body>
<h1>這是靜態資源</h1>

</body>
</html>

動態資源

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <title>動態資源</title>
</head>
<body>
<h2>這是動態資源</h2>
<span th:text="${key}"></span>
</body>
</html>

運行項目然後分別訪問以下鏈接 http://localhost:8080/list、 http://localhost:8080/lo、 http://localhost:8080/Hi

總結：Thymeleaf相對與jsp來說，更加節省資源，也更加方便調用資源

Joshua丶Zheng

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Spring整合系列： idea SpringBoot+Mybatis+Thymeleaf

總結：Thymeleaf相對與jsp來說，更加節省資源，也更加方便調用資源

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