工具：
-
数据库：mysql
-
编辑器：idea
-
jar包管理：maven
项目搭建：
1.项目创建
new->project:
next:
next:
next:
finish后，另外创建如图的项目结构:
2.配置文件（重点）
2.0（最重要的pom.xml文件）
<?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>2.1.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>mr.s</groupId>
<artifactId>sbm</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sbm</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- 项目热启动 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
<scope>true</scope>
</dependency>
<!-- generator mybatis逆向 -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- 热启动插件 -->
<plugin>
<!--热部署配置-->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!--fork:如果没有该项配置,整个devtools不会起作用-->
<fork>true</fork>
</configuration>
</plugin>
<!--mybatis 逆向工程插件-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<executions>
<execution>
<id>Generate MyBatis Artifacts</id>
<phase>deploy</phase>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
<configuration>
<!-- generator 工具配置文件的位置 -->
<configurationFile>src/main/resources/generator.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>2.1 数据库创建并创建user表
2.2 配置logback.xml，日志
<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true">
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<!-- encoders are by default assigned the type ch.qos.logback.classic.encoder.PatternLayoutEncoder -->
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<!-- sql语句打印 -->
<logger name="mr.s.sbm.dao" level="DEBUG" />
<root level="info">
<appender-ref ref="STDOUT" />
</root>
</configuration>2.3 配置mybatis逆向文件，generator.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置数据库连接 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/sbm"
userId="root"
password="123">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 指定Entity实体类生成的位置 -->
<javaModelGenerator targetPackage="mr.s.sbm.entity"
targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--指定SQL映射文件生成的位置 -->
<sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 指定DAO接口生成的位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="mr.s.sbm.dao"
targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 指定Table的生成策略 -->
<table tableName="user" domainObjectName="User">
</table>
</context>
</generatorConfiguration>2.4 配置application.yml 文件
spring:
datasource:
url: jdbc:mysql://localhost:3306/sbm?useUnicode=true&serverTimezone=UTC&characterEncoding=utf-8&nullCatalogMeansCurrent=true
username: root
password: 123
driver-class-name: com.mysql.cj.jdbc.Driver
type: com.mysql.cj.jdbc.MysqlConnectionPoolDataSource
thymeleaf:
cache: false
mybatis:
type-aliases-package: mr.s.entity
mapper-locations: classpath:mapper/*.xml
logging:
config: classpath:logback.xml
server:
port: 80803. 正式开干！
3.1 首先生成逆向文件 mapper.xml 等等，具体操作如图，采用插件生成
3.2 编写controller service service.impl
package mr.s.sbm.controller;
import mr.s.sbm.entity.User;
import mr.s.sbm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PostMapping;
@Controller
public class UserController {
@Autowired
private UserService userService;
@PostMapping("user")
public String user(User user, Model model){
userService.saveUser(user);
model.addAttribute("user", user);
return "user-detail";
}
}
package mr.s.sbm.service;
import mr.s.sbm.entity.User;
public interface UserService {
void saveUser(User user);
}
package mr.s.sbm.service.impl;
import mr.s.sbm.dao.UserMapper;
import mr.s.sbm.entity.User;
import mr.s.sbm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
@Override
public void saveUser(User user) {
userMapper.insert(user);
}
}
其中有一点，
，这个报红并不影响程序运行，请误惊慌！！！
3.2 在thymeleaf下编写 index.html user-detail.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>SpringBoot</title>
</head>
<body>
<h1>Hello SpringBoot!</h1>
<form th:action="@{/user}" method="post">
用户名:<input type="text" name="username"><br>
密码:<input type="password" name="password"><br>
<input type="submit" value="提交">
</form>
</body>
</html><!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>用户信息</title>
</head>
<body>
用户名:<input type="text" th:value="${user.username}"><br>
密码:<input type="text" th:value="${user.password}">
</body>
</html>4. 查看运行
5. 最终项目结构
