springboot集成mybatisplus实例详解

<?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 https://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>1.5.21.RELEASE</version>
  <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <groupId>com.xiaostudy</groupId>
 <artifactId>demo1</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <name>demo1</name>
 <description>Demo project for Spring Boot</description>
 <properties>
  <java.version>1.8</java.version>
 </properties>
 <dependencies>
  <!-- spring-boot -->
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter</artifactId>
  </dependency>
  <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-test</artifactId>
   <scope>test</scope>
  </dependency>
  <!--mybatis-plus自动的维护了mybatis以及mybatis-spring的依赖，
  在springboot中这三者不能同时的出现，避免版本的冲突，表示：跳进过这个坑-->
  <dependency>
   <groupId>com.baomidou</groupId>
   <artifactId>mybatis-plus-boot-starter</artifactId>
   <version>3.1.1</version>
  </dependency>
  <!-- 引入Druid依赖，阿里巴巴所提供的数据源 -->
  <dependency>
   <groupId>com.alibaba</groupId><mark style="color:transparent">本文来源gaodaimacom搞#^代%!码网@</mark>
   <artifactId>druid</artifactId>
   <version>1.0.29</version>
  </dependency>
  <!-- 提供mysql驱动 -->
  <dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <version>5.1.38</version>
  </dependency>
 </dependencies>
 <build>
  <plugins>
   <plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
   </plugin>
  </plugins>
 </build>
</project>

package com.xiaostudy.demo1.entity;
import com.baomidou.mybatisplus.annotation.TableName;
import java.io.Serializable;
@TableName("t_user")
public class User implements Serializable {
 private String id;
 private String userName;
 private String userPassword;
 public String getId() {
  return id;
 }

 public void setId(String id) {
  this.id = id;
 }

 public String getUserName() {
  return userName;
 }

 public void setUserName(String userName) {
  this.userName = userName;
 }

 public String getUserPassword() {
  return userPassword;
 }

 public void setUserPassword(String userPassword) {
  this.userPassword = userPassword;
 }
 @Override
 public String toString() {
  return "User{" +
    "id='" + id + '\'' +
    ", userName='" + userName + '\'' +
    ", userPassword='" + userPassword + '\'' +
    '}';
 }
}