tk.mybatis 简单的使用方法
一 pom.xml 导入依赖 （这里低版本会报错）
tk.mybatis
mapper-spring-boot-starter
2.1.5
二 书写PersonZhuJie类
package com.example.demo.bean;
import javax.persistence.*;
import javax.validation.constraints.NotNull;
@Table(name = "per")
public class PersonZhuJie {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
@NotNull(message = "用户名不能为空")
private String name;
@NotNull(message = "密码不能为空")
private String password;
@Column(name = "age")
private int age;
@Column(name = "sex")
private String sex;
@Column(name = "address")
public String address;
public Integer getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
三 mapper 包书写PersonZhuJieMapper接口
package com.example.demo.mapper;
import com.example.demo.bean.PersonZhuJie;
import tk.mybatis.mapper.common.Mapper;
public interface PersonZhuJieMapper extends Mapper {
}
四 service包书写接口和工具类
目录结构如下
BaseService 书写所有的接口在里面
package com.example.demo.service;
import java.util.List;
public interface BaseService {
List selectAll(T record);
List selectAll();
}
PersonZhujieService 继承BaseService ，有利于接口的管理
package com.example.demo.service;
import com.example.demo.bean.PersonZhuJie;
import java.util.List;
public interface PersonZhujieService extends BaseService{
}
BaseImpl实现BaseService接口里面的方法，这里可以调用tk.mybatis里封装的sql语句。
package com.example.demo.service.impl;
import com.example.demo.service.BaseService;
import org.springframework.beans.factory.annotation.Autowired;
import tk.mybatis.mapper.common.Mapper; //这里注意不要导错包
import java.util.List;
public abstract class BaseImpl implements BaseService {
@Autowired
protected Mapper mapper;
public Mapper getMapper() {
return mapper;
}
@Override
public List selectAll(T record) {
return mapper.select(record);
}
@Override
public List selectAll() {
return mapper.selectAll();
}
}
PersonZhujieImpl 继承BaseImpl，有利于管理接口
package com.example.demo.service.impl;
import com.example.demo.bean.PersonZhuJie;
import com.example.demo.service.PersonZhujieService;
import org.springframework.stereotype.Service;
@Service
public class PersonZhujieImpl extends BaseImpl implements PersonZhujieService{
}
五 resource 包下的目录
personzhujie.xml
application.properties
server.port=6785
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/booksystem?serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5
server.tomcat.uri-encoding=UTF-8
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#指定全局配置文件
mybatis.config= classpath:mybatis/mybatis-config
#指定sql文件
mybatis.mapperLocations=classpath:mybatis/mapper/*.xml
mybatis.typeAliasesPackage=com.lgp.SpringBoot.bean
最后一步就是程序入口，这里很重要
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
//@MapperScan(value = "com.example.demo.mapper")
@tk.mybatis.spring.annotation.MapperScan("com.example.demo.mapper") //指向你的mapper路径
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
sql语句
/*
Navicat Premium Data Transfer
Source Server : root
Source Server Type : MySQL
Source Server Version : 50559
Source Host : localhost:3306
Source Schema : booksystem
Target Server Type : MySQL
Target Server Version : 50559
File Encoding : 65001
Date: 25/07/2019 18:07:40
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for per
-- ----------------------------
DROP TABLE IF EXISTS `per`;
CREATE TABLE `per` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`age` varchar(11) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT '0',
`address` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`sex` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL,
`password` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 16 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of per
-- ----------------------------
INSERT INTO `per` VALUES (1, 'Ewan McGregor', '34', 'AM', '', '123');
INSERT INTO `per` VALUES (2, 'Saoirse Ronan', '18', 'AM', '', '123');
INSERT INTO `per` VALUES (3, 'Quentin Tarantino', '39', 'AM', '', '234');
INSERT INTO `per` VALUES (4, 'muyuan', '0', NULL, NULL, '456');
SET FOREIGN_KEY_CHECKS = 1;
六 PersonController
package com.example.demo.controller;
import com.example.demo.bean.Person;
import com.example.demo.bean.PersonZhuJie;
import com.example.demo.mapper.PersonMapper;
import com.example.demo.service.PersonZhujieService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import javax.security.sasl.SaslServer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
public class PersonController {
@Autowired
PersonZhujieService personZhujieService;
@GetMapping("/findAll")
public Map findAll(){
Map map = new HashMap();
map.put("people",personZhujieService.selectAll());
return map;
}
}
结果
