数据库

CREATE DATABASE test;

USE test;

CREATE TABLE `user` (

`id` BIGINT(20) NOT NULL AUTO_INCREMENT,

`username` VARCHAR(50) NOT NULL COMMENT '用户名',

`create_time` DATETIME DEFAULT NULL COMMENT '创建时间',

PRIMARY KEY (`id`),

UNIQUE KEY `username` (`username`)

) ENGINE=INNODB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8 COMMENT='用户';

项目pom.xml

<?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>
 <groupId>com.dyp</groupId>
 <artifactId>dyp-test</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <name>dyp-test</name>
 <description>Demo project for Spring Boot</description>
 <packaging>jar</packaging>
 <properties>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 <java.version>1.8</java.version>
 </properties>
 <!-- Inherit defaults from Spring Boot -->
 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.0.0.BUILD-SNAPSHOT</version>
 </parent>
 <!-- Add typical dependencies for a web application -->
 <dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <!-- mybatis的orm插件 -->
 <dependency>
 <groupId>com.baomidou</groupId>
 <artifactId>mybatisplus-spring-boot-starter</artifactId>
 <version>1.0.4</version>
 </dependency>
 <dependency>
 <groupId>com.baomidou</groupId>
 <artifactId>mybatis-plus</artifactId>
 <version>2.0.7</version>
 </dependency>
 <!-- https://mvnrepository.com/artifact/org.apache.velocity/velocity -->
 <dependency>
 <groupId>org.apache.velocity</groupId>
 <artifactId>velocity</artifactId>
 <version>1.7</version>
 </dependency>
 <!-- https://mvnrepository.com/artifact/org.freemarker/freemarker -->
 <dependency>
 <groupId>org.freemarker</groupId>
 <artifactId>freemarker</artifactId>
 <version>2.3.28</version>
 </dependency>
 <!--数据库连接jdbc依赖-->
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-jdbc</artifactId>
 </dependency>
 <!--mysql链接依赖-->
 <dependency>
 <groupId>mysql</groupId>
 <artifactId>mysql-connector-java</artifactId>
 </dependency>
 <!--阿里druid数据库链接依赖-->
 <dependency>
 <groupId>com.alibaba</groupId>
 <artifactId>druid</artifactId>
 <version>1.1.9</version>
 </dependency>
 <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
 <dependency>
 <groupId>org.projectlombok</groupId>
 <artifactId>lombok</artifactId>
 <version>0.10.1</version>
 <scope>provided</scope>
 </dependency>
 </dependencies>
 <!-- Package as an executable jar -->
 <build>
 <plugins>
 <plugin>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-maven-plugin</artifactId>
 </plugin>
 </plugins>
 </build>
 <!-- Add Spring repositories -->
 <!-- (you don't need this if you are using a .RELEASE version) -->
 <repositories>
 <repository>
 <id>spring-snapshots</id>
 <url>http://repo.spring.io/snapshot</url>
 <snapshots>
 <enabled>true</enabled>
 </snapshots>
 </repository>
 <repository>
 <id>spring-milestones</id>
 <url>http://repo.spring.io/milestone</url>
 </repository>
 </repositories>
 <pluginRepositories>
 <pluginRepository>
 <id>spring-snapshots</id>
 <url>http://repo.spring.io/snapshot</url>
 </pluginRepository>
 <pluginRepository>
 <id>spring-milestones</id>
 <url>http://repo.spring.io/milestone</url>
 </pluginRepository>
 </pluginRepositories>
</project>

application.yml 相关的配置

spring:
 datasource:
 type: com.alibaba.druid.pool.DruidDataSource
 driver-class-name: com.mysql.jdbc.Driver
 url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&allowMultiQueries=true
 username: root
 password: root
 druid:
 initial-size: 5
 min-idle: 5
 maxActive: 20
 maxWait: 60000
 timeBetweenEvictionRunsMillis: 60000
 minEvictableIdleTimeMillis: 300000
 validationQuery: SELECT 1 FROM DUAL
 testWhileIdle: true
 testOnBorrow: false
 testOnReturn: false
 poolPreparedStatements: true
 maxPoolPreparedStatementPerConnectionSize: 20
 filters: stat,wall
 connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
 web-stat-filter:
 enabled: true
 url-pattern: "/*"
 exclusions: "*.js,*.gif,*.jpg,*.bmp,*.png,*.css,*.ico,/druid/*"
 # DruidStatViewServlet
 stat-view-servlet:
 url-pattern: "/druid/*"
 allow: 127.0.0.1,192.168.1.1
 deny: 192.168.1.1
 reset-enable: false
 login-username: admin
 login-password: 123456
mybatis-plus:
 mapper-locations: classpath:/com/dyp/dyptest/mapper/*/*.xml
 typeAliasesPackage: com.dyp.dyptest.entity
 global-config:
 id-type: 2
 field-strategy: 2
 db-column-underline: true
 refresh-mapper: true
 configuration:
 map-underscore-to-camel-case: true
 cache-enabled: false
server:
 port: 8082

com.dyp.dyptest.config相关配置

package com.dyp.dyptest.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
/**
 * 数据源配置
 */
@Configuration
public class DataSourcesConfig {
 @Bean(name="dataSource")
 @ConfigurationProperties(prefix="spring.datasource")
 public DataSource dataSource(){
 return new DruidDataSource();
 }
 // 配置事物管理器
 @Bean(name="transactionManager")
 public DataSourceTransactionManager transactionManager(){
 return new DataSourceTransactionManager(dataSource());
 }
}

package com.dyp.dyptest.config;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class DruidConfiguration {
 @Bean
 public ServletRegistrationBean startViewServlet(){
 ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
 // IP白名单
 servletRegistrationBean.addInitParameter("allow","127.0.0.1");
 // IP黑名单(共同存在时，deny优先于allow)
 servletRegistrationBean.addInitParameter("deny","127.0.0.1");
 //控制台管理用户
 servletRegistrationBean.addInitParameter("loginUsername","admin");
 servletRegistrationBean.addInitParameter("loginPassword","123456");
 //是否能够重置数据
 servletRegistrationBean.addInitParameter("resetEnable","false");
 return servletRegistrationBean;
 }
 @Bean
 public FilterRegistrationBean statFilter(){
 FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
 //添加过滤规则
 filterRegistrationBean.addUrlPatterns("/*");
 //忽略过滤的格式
 filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
 return filterRegistrationBean;
 }
}

package com.warrior.config;
import com.baomidou.mybatisplus.plugins.PerformanceInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.baomidou.mybatisplus.plugins.PaginationInterceptor;
import org.springframework.context.annotation.Profile;
@Configuration
//扫描dao或者是Mapper接口
@MapperScan("com.dyp.dyptest.mapper*")
public class MybatisPlusConfig {
 /**
 * mybatis-plus 分页插件
 */
 @Bean
 public PaginationInterceptor paginationInterceptor(){
 PaginationInterceptor page = new PaginationInterceptor();
 page.setDialectType("mysql");
 return page;
 }
 /**
 * SQL执行效率插件
 * 性能分析拦截器，用于输出每条 SQL 语句及其执行时间
 */
 @Bean
 @Profile({"dev","pro"})// 设置 dev pro 环境开启
 public PerformanceInterceptor performanceInterceptor() {
 return new PerformanceInterceptor();
 }
}

代码生成器代码

package com.dyp.dyptest.Generator;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.converts.MySqlTypeConvert;
import com.baomidou.mybatisplus.generator.config.rules.DbColumnType;
import com.baomidou.mybatisplus.generator.config.rules.DbType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.dyp.dyptest.config.DataSourcesConfig;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
 * <p>
 * 代码生成器演示
 * </p>
 */
public class CodeGenerator {
 final static String dirPath = "C://";
 public static final String DB_URL = "jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8&allowMultiQueries=true";
 public static final String USER_NAME = "root";
 public static final String PASSWORD = "root";
 public static final String DRIVER = "com.mysql.jdbc.Driver";
 public static final String AUTHOR = "dyp";
 // 输出到哪个目录
 public static final String OUTPUT_FILE = "c:\dyp";
 //生成类
 public static final String PACKAGE = "com.dyp";
 public static void generateByTables(boolean serviceNameStartWithI, String... tableNames) {
 AutoGenerator mpg = new AutoGenerator();
 // 选择 freemarker 引擎，默认 Veloctiy
 //mpg.setTemplateEngine(new FreemarkerTemplateEngine());
 // 全局配置
 GlobalConfig gc = new GlobalConfig();
 gc.setOutputDir(dirPath);
 gc.setAuthor(AUTHOR);
 gc.setFileOverride(true); //是否覆盖
 gc.setActiveRecord(true);// 不需要ActiveRecord特性的请改为false
 gc.setEnableCache(false);// XML 二级缓存
 gc.setBaseResultMap(true);// XML ResultMap
 gc.setBaseColumnList(true);// XML columList
 // 自定义文件命名，注意 %s 会自动填充表实体属性！
 // gc.setMapperName("%sDao");
 // gc.setXmlName("%sMapper");
 // gc.setServiceName("MP%sService");
 // gc.setServiceImplName("%sServiceDiy");
 // gc.setControllerName("%sAction");
 mpg.setGlobalConfig(gc);
 // 数据源配置
 DataSourceConfig dsc = new DataSourceConfig();
 dsc.setDbType(DbType.MYSQL);
 dsc.setTypeConvert(new MySqlTypeConvert(){
 // 自定义数据库表字段类型转换【可选】
 @Override
 public DbColumnType processTypeConvert(String fieldType) {
 System.out.println("转换类型：" + fieldType);
 // 注意！！processTypeConvert 存在默认类型转换，如果不是你要的效果请自定义返回、非如下直接返回。
 return super.processTypeConvert(fieldType);
 }
 });
 dsc.setDriverName(DRIVER);
 dsc.setUsername(USER_NAME);
 dsc.setPassword(PASSWORD);
 dsc.setUrl(DB_URL);
 mpg.setDataSource(dsc);
 // 策略配置
 StrategyConfig strategy = new StrategyConfig();
 // strategy.setCapitalMode(true);// 全局大写命名 ORACLE 注意
 strategy.setTablePrefix(new String[] { "tb_", "tsys_" });// 此处可以修改为您的表前缀
 strategy.setNaming(NamingStrategy.underline_to_camel);// 表名生成策略
 //strategy.setInclude(new String[] { "user" }); // 需要生成的表
 strategy.setInclude(tableNames); // 需要生成的表
 // strategy.setExclude(new String[]{"test"}); // 排除生成的表
 // 自定义实体父类
 // strategy.setSuperEntityClass("com.baomidou.demo.TestEntity");
 // 自定义实体，公共字段
 // strategy.setSuperEntityColumns(new String[] { "test_id", "age" });
 // 自定义 mapper 父类
 // strategy.setSuperMapperClass("com.baomidou.demo.TestMapper");
 // 自定义 service 父类
 // strategy.setSuperServiceClass("com.baomidou.demo.TestService");
 // 自定义 service 实现类父类
 // strategy.setSuperServiceImplClass("com.baomidou.demo.TestServiceImpl");
 // 自定义 controller 父类
 // strategy.setSuperControllerClass("com.baomidou.demo.TestController");
 // 【实体】是否生成字段常量（默认 false）
 // public static final String ID = "test_id";
 // strategy.setEntityColumnConstant(true);
 // 【实体】是否为构建者模型（默认 false）
 // public User setName(String name) {this.name = name; return this;}
 strategy.setEntityBuilderModel(true);
 mpg.setStrategy(strategy);
 // 包配置
 PackageConfig pc = new PackageConfig();
 pc.setParent(PACKAGE);
 pc.setModuleName("dyptest");
 pc.setController("controler");
 pc.setEntity("entity");
 pc.setMapper("mapper");
 pc.setService("service");
 pc.setServiceImpl("serviceImpl");
 pc.setXml("mapperXml");
 mpg.setPackageInfo(pc);
 // 注入自定义配置，可以在 VM 中使用 cfg.abc 【可无】
 InjectionConfig cfg = new InjectionConfig() {
 @Override
 public void initMap() {
 Map<String, Object> map = new HashMap<String, Object>();
 map.put("dyp", this.getConfig().getGlobalConfig().getAuthor() + "-mp");
 this.setMap(map);
 }
 };
 // 自定义 xxList.jsp 生成
 List<FileOutConfig> focList = new ArrayList<FileOutConfig>();
/* focList.add(new FileOutConfig("/template/list.jsp.vm") {
 @Override
 public String outputFile(TableInfo tableInfo) {
 // 自定义输入文件名称
 return "D://my_" + tableInfo.getEntityName() + ".jsp";
 }
 });
 cfg.setFileOutConfigList(focList);
 mpg.setCfg(cfg);*/
 // 调整 xml 生成目录演示
/* focList.add(new FileOutConfig("/templates/mapper.xml.vm") {
 @Override
 public String outputFile(TableInfo tableInfo) {
 return dirPath + tableInfo.getEntityName() + "Mapper.xml";
 }
 });
 cfg.setFileOutConfigList(focList);
 */
 mpg.setCfg(cfg);
 // 关闭默认 xml 生成，调整生成 至 根目录
/* TemplateConfig tc = new TemplateConfig();
 tc.setXml(null);
 mpg.setTemplate(tc);*/
 // 自定义模板配置，可以 copy 源码 mybatis-plus/src/main/resources/templates 下面内容修改，
 // 放置自己项目的 src/main/resources/templates 目录下, 默认名称一下可以不配置，也可以自定义模板名称
 // TemplateConfig tc = new TemplateConfig();
 // tc.setController("...");
 // tc.setEntity("...");
 // tc.setMapper("...");
 // tc.setXml("...");
 // tc.setService("...");
 // tc.setServiceImpl("...");
 // 如上任何一个模块如果设置 空 OR Null 将不生成该模块。
 // mpg.setTemplate(tc);
 // 执行生成
 mpg.execute();
 // 打印注入设置【可无】
 System.err.println(mpg.getCfg().getMap().get("dyp"));
 }
 /**
 * <p>
 * MySQL 生成演示
 * </p>
 */
 public static void main(String[] args) {
 boolean serviceNameStartWithI = false;
 //指定生成的表名
 String[] tableNames = new String[]{"user"};
 generateByTables(serviceNameStartWithI, tableNames);
 }
}

package com.dyp.dyptest.controler;
import com.dyp.dyptest.entity.User;
import com.dyp.dyptest.service.IUserService;
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 java.util.Date;
import java.util.List;
/**
 * <p>
 * 用户 前端控制器
 * </p>
 *
 * @author dyp
 * @since 2019-07-09
 */
@Controller
@RequestMapping("/dyptest/user")
public class UserController {
 @Autowired
 IUserService iUserService;
 @RequestMapping("/add")
 @ResponseBody
 public String add() {
 //insert
 User user = new User();
 user.setUsername("dyp");
 user.setCreateTime(new Date());
 boolean res = iUserService.insert(user);
 return res ? "success" : "fail";
 }
 @RequestMapping("/list")
 @ResponseBody
 public List<User> list() {
 return iUserService.selectList(null);
 }
}

package com.dyp.dyptest.entity;
import com.baomidou.mybatisplus.enums.IdType;
import java.util.Date;
import com.baomidou.mybatisplus.annotations.TableId;
import com.baomidou.mybatisplus.annotations.TableField;
import com.baomidou.mybatisplus.activerecord.Model;
import java.io.Serializable;
/**
 * <p>
 * 用户
 * </p>
 *
 * @author dyp
 * @since 2019-07-09
 */
public class User extends Model<User> {
 private static final long serialVersionUID = 1L;
 @TableId(value="id", type= IdType.AUTO)
 private Long id;
 /**
 * 用户名
 */
 private String username;
 /**
 * 创建时间
 */
 @TableField("create_time")
 private Date createTime;
 public Long getId() {
 return id;
 }
 public User setId(Long id) {
 this.id = id;
 return this;
 }
 public String getUsername() {
 return username;
 }
 public User setUsername(String username) {
 this.username = username;
 return this;
 }
 public Date getCreateTime() {
 return createTime;
 }
 public User setCreateTime(Date createTime) {
 this.createTime = createTime;
 return this;
 }
 @Override
 protected Serializable pkVal() {
 return this.id;
 }
}

package com.dyp.dyptest.mapper;
import com.dyp.dyptest.entity.User;
import com.baomidou.mybatisplus.mapper.BaseMapper;
/**
 * <p>
 * 用户 Mapper 接口
 * </p>
 *
 * @author dyp
 * @since 2019-07-09
 */
public interface UserMapper extends BaseMapper<User> {
}

package com.dyp.dyptest.service;
import com.dyp.dyptest.entity.User;
import com.baomidou.mybatisplus.service.IService;
/**
 * <p>
 * 用户 服务类
 * </p>
 *
 * @author dyp
 * @since 2019-07-09
 */
public interface IUserService extends IService<User> {
 
}

package com.dyp.dyptest.serviceImpl;
import com.dyp.dyptest.entity.User;
import com.dyp.dyptest.mapper.UserMapper;
import com.dyp.dyptest.service.IUserService;
import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;
/**
 * <p>
 * 用户 服务实现类
 * </p>
 *
 * @author dyp
 * @since 2019-07-09
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
 
}

package com.dyp.dyptest;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.dyp.dyptest.mapper") //配置mapper扫描
public class DypTestApplication {
 public static void main(String[] args) {
 SpringApplication.run(DypTestApplication.class, args);
 }
}