1. springboot整合jdbcTemplate
1.1 pom.xml
4.0.0 org.springframework.boot spring-boot-starter-parent 2.5.5 com.yl jdbctemplate 0.0.1-SNAPSHOT jdbctemplate Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-jdbc org.springframework.boot spring-boot-starter-web mysql mysql-connector-java runtime org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin
1.2 application.properties
spring.datasource.url=jdbc:mysql://localhost:3306/demo?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8 spring.datasource.username=root spring.datasource.password=root
1.3 model
package com.yl.jdbctemplate.model;
import java.io.Serializable;
public class Student implements Serializable {
private Integer id;
private String stuName;
private String stuNo;
private Integer age;
private String stuMessage;
@Override
public String toString() {
return "Student{" +
"id=" + id +
", stuName='" + stuName + '\'' +
", stuNo='" + stuNo + '\'' +
", age=" + age +
", stuMessage='" + stuMessage + '\'' +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getStuName() {
return stuName;
}
public void setStuName(String stuName) {
this.stuName = stuName;
}
public String getStuNo() {
return stuNo;
}
public void setStuNo(String stuNo) {
this.stuNo = stuNo;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getStuMessage() {
return stuMessage;
}
public void setStuMessage(String stuMessage) {
this.stuMessage = stuMessage;
}
}
1.4 service
package com.yl.jdbctemplate.service;
import com.yl.jdbctemplate.model.Student;
import java.util.List;
public interface StudentService {
int addStudent(Student student);
int addStudent2(Student student);
int updateStudent(Student student);
int deleteStudentById(Integer id);
List getAllStudent();
List getAllStudent2();
}
1.5 serviceImpl,crud案例
package com.yl.jdbctemplate.service.impl;
import com.yl.jdbctemplate.model.Student;
import com.yl.jdbctemplate.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.PreparedStatementCreator;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.stereotype.Service;
import java.sql.*;
import java.util.List;
@Service
public class StudentServiceImpl implements StudentService {
@Autowired
JdbcTemplate jdbcTemplate;
@Override
public int addStudent(Student student) {
int result = jdbcTemplate.update("insert into student(stu_name,stu_no,age,stu_message) values(?,?,?,?) "
,student.getStuName(),student.getStuNo(),student.getAge(),student.getStuMessage());
return result;
}
//插入数据，并且回写id
@Override
public int addStudent2(Student student) {
GeneratedKeyHolder keyHolder = new GeneratedKeyHolder();
int result = jdbcTemplate.update(new PreparedStatementCreator() {
@Override
public PreparedStatement createPreparedStatement(Connection con) throws SQLException {
//插入数据后返回主键
PreparedStatement ps = con.prepareStatement("insert into student(stu_name,stu_no,age,stu_message) values(?,?,?,?)"
, Statement.RETURN_GENERATED_KEYS);
ps.setString(1,student.getStuName());
ps.setString(2,student.getStuNo());
ps.setInt(3,student.getAge());
ps.setString(4,student.getStuMessage());
return ps;
}
},keyHolder);
student.setId(keyHolder.getKey().intValue());
return result;
}
@Override
public int updateStudent(Student student) {
int result = jdbcTemplate.update("update student set stu_name=?,stu_no=?,age=?,stu_message=? where id = ?",
student.getStuName(),student.getStuNo(),student.getAge(),student.getStuMessage(),student.getId());
return result;
}
@Override
public int deleteStudentById(Integer id) {
int result = jdbcTemplate.update("delete from student where id = ?", id);
return result;
}
//这种查询比较麻烦，要一个一个设值
@Override
public List getAllStudent() {
List list = jdbcTemplate.query("select * from student", new RowMapper() {
@Override
public Student mapRow(ResultSet rs, int rowNum) throws SQLException {
int id = rs.getInt("id");
String stuName = rs.getString("stu_name");
String stuNo = rs.getString("stu_no");
int age = rs.getInt("age");
String stuMessage = rs.getString("stu_message");
Student student = new Student();
student.setId(id);
student.setStuName(stuName);
student.setStuNo(stuNo);
student.setAge(age);
student.setStuMessage(stuMessage);
return student;
}
});
return list;
}
//这种方式比较方便，但是有一个前提：数据库表的字段和java实体类的属性名要完全一致
//或者数据库表的字段下划线命名方式对应java实体类属性名的驼峰命名方式
@Override
public List getAllStudent2() {
List list = jdbcTemplate.query("select * from student",new BeanPropertyRowMapper<>(Student.class));
return list;
}
}
2. jdbcTemplate配置多数据源
2.1 pom.xml
4.0.0 org.springframework.boot spring-boot-starter-parent 2.5.5 com.yl jdbctemplateutil 0.0.1-SNAPSHOT jdbctemplateutil Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-jdbc org.springframework.boot spring-boot-starter-web mysql mysql-connector-java runtime org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin
2.2 application.properties
# springboot配置多数据源 spring.datasource.one.username=root spring.datasource.one.password=root spring.datasource.one.jdbcurl=jdbc:mysql://localhost:3306/demo?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai spring.datasource.two.username=root spring.datasource.two.password=root spring.datasource.two.jdbcurl=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
2.3 实体类
package com.yl.jdbctemplateutil.model;
import java.io.Serializable;
public class Student implements Serializable {
private Integer id;
private String stuName;
private String stuNo;
private Integer age;
private String stuMessage;
@Override
public String toString() {
return "Student{" +
"id=" + id +
", stuName='" + stuName + '\'' +
", stuNo='" + stuNo + '\'' +
", age=" + age +
", stuMessage='" + stuMessage + '\'' +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getStuName() {
return stuName;
}
public void setStuName(String stuName) {
this.stuName = stuName;
}
public String getStuNo() {
return stuNo;
}
public void setStuNo(String stuNo) {
this.stuNo = stuNo;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getStuMessage() {
return stuMessage;
}
public void setStuMessage(String stuMessage) {
this.stuMessage = stuMessage;
}
}
2.4 数据源配置
package com.yl.jdbctemplateutil.config;
import com.zaxxer.hikari.HikariDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
@Configuration
public class DatasourceConfig {
@Bean
@ConfigurationProperties(prefix = "spring.datasource.one")
DataSource dsOne() {
return new HikariDataSource();
}
@Bean
@ConfigurationProperties(prefix = "spring.datasource.two")
DataSource dsTwo() {
return new HikariDataSource();
}
}
2.5 jdbctemplate配置
package com.yl.jdbctemplateutil.config;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import javax.sql.DataSource;
@Configuration
public class JdbcTemplateConfig {
@Bean
JdbcTemplate jdbcTemplateOne(@Qualifier("dsOne")DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
@Bean
JdbcTemplate jdbcTemplateTwo(@Qualifier("dsTwo")DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
}
2.6 注入模板测试
3. springboot整合mybatis(注解方式)
3.1 pom.xml
4.0.0 org.springframework.boot spring-boot-starter-parent 2.5.5 com.yl mybatis 0.0.1-SNAPSHOT mybatis Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-web org.mybatis.spring.boot mybatis-spring-boot-starter 2.2.0 mysql mysql-connector-java runtime org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin
3.2 application.properties
# 数据源配置 spring.datasource.username=root spring.datasource.password=root spring.datasource.url=jdbc:mysql://localhost:3306/demo?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
3.3 实体类
package com.yl.mybatis.model;
import java.io.Serializable;
public class Student implements Serializable {
private Integer id;
private String stuName;
private String stuNo;
private Integer age;
private String stuMessage;
@Override
public String toString() {
return "Student{" +
"id=" + id +
", stuName='" + stuName + '\'' +
", stuNo='" + stuNo + '\'' +
", age=" + age +
", stuMessage='" + stuMessage + '\'' +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getStuName() {
return stuName;
}
public void setStuName(String stuName) {
this.stuName = stuName;
}
public String getStuNo() {
return stuNo;
}
public void setStuNo(String stuNo) {
this.stuNo = stuNo;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getStuMessage() {
return stuMessage;
}
public void setStuMessage(String stuMessage) {
this.stuMessage = stuMessage;
}
}
3.4 mapper
package com.yl.mybatis.mapper;
import com.yl.mybatis.model.Student;
import org.apache.ibatis.annotations.*;
import java.util.List;
public interface StudentMapper {
@Select("select * from student where id = #{id}")
Student getStudentById(Integer id);
@Insert("insert into student(stu_name,stu_no,age,stu_message) values(#{stuName},#{stuNo},#{age},#{stuMessage})")
//回写id
@SelectKey(statement = "select last_insert_id()",keyProperty = "id",before = false,resultType = Integer.class)
Integer addStudent(Student student);
//表字段和java实体属性映射
@Results({
@Result(property = "stuName",column = "stu_name"),
@Result(property = "stuNo",column = "stu_no"),
@Result(property = "stuMessage",column = "stu_message")
})
@Select("select * from student")
List getAllStudent();
@Delete("delete from student where id = #{id}")
Integer deleteById(Integer id);
@Update("update student set stu_name = #{stuName},stu_no = #{stuNo},age = #{age},stu_message = #{stuMessage} where id = #{id}")
Integer updateByStudent(Student student);
}
3.5 service
package com.yl.mybatis.service;
import com.yl.mybatis.model.Student;
import java.util.List;
public interface StudentService {
Student getStudentById(Integer id);
Integer addStudent(Student student);
List getAllStudent();
Integer deleteById(Integer id);
Integer updateById(Student student);
}
3.6 srviceImpl
package com.yl.mybatis.service.impl;
import com.yl.mybatis.mapper.StudentMapper;
import com.yl.mybatis.model.Student;
import com.yl.mybatis.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class StudentServiceImpl implements StudentService {
@Autowired
private StudentMapper studentMapper;
@Override
public Student getStudentById(Integer id) {
return studentMapper.getStudentById(id);
}
@Override
public Integer addStudent(Student student) {
return studentMapper.addStudent(student);
}
@Override
public List getAllStudent() {
return studentMapper.getAllStudent();
}
@Override
public Integer deleteById(Integer id) {
return studentMapper.deleteById(id);
}
@Override
public Integer updateById(Student student) {
return studentMapper.updateByStudent(student);
}
}
3.7 扫描mapper
3.8 测试
4. springboot整合mybatis(xml方式)
4.1 pom.xml
4.0.0 org.springframework.boot spring-boot-starter-parent 2.5.5 com.yl mybatis 0.0.1-SNAPSHOT mybatis Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-web org.mybatis.spring.boot mybatis-spring-boot-starter 2.2.0 mysql mysql-connector-java runtime org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin
4.2 application.xml
# 数据源配置 spring.datasource.username=root spring.datasource.password=root spring.datasource.url=jdbc:mysql://localhost:3306/demo?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai # mybatis配置 # 扫描xml文件 mybatis.mapper-locations=classpath:mapper/*.xml
4.3 实体类
package com.yl.mybatis.model;
import java.io.Serializable;
public class Student implements Serializable {
private Integer id;
private String stuName;
private String stuNo;
private Integer age;
private String stuMessage;
@Override
public String toString() {
return "Student{" +
"id=" + id +
", stuName='" + stuName + '\'' +
", stuNo='" + stuNo + '\'' +
", age=" + age +
", stuMessage='" + stuMessage + '\'' +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getStuName() {
return stuName;
}
public void setStuName(String stuName) {
this.stuName = stuName;
}
public String getStuNo() {
return stuNo;
}
public void setStuNo(String stuNo) {
this.stuNo = stuNo;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getStuMessage() {
return stuMessage;
}
public void setStuMessage(String stuMessage) {
this.stuMessage = stuMessage;
}
}
4.4 mapper
package com.yl.mybatis.mapper;
import com.yl.mybatis.model.Student;
import java.util.List;
public interface StudentMapper {
Student getStudentById(Integer id);
Integer addStudent(Student student);
List getAllStudent();
Integer deleteById(Integer id);
Integer updateById(Student student);
}
4.5 mapper.xml
insert into student(stu_name,stu_no,age,stu_message) values(#{stuName},#{stuNo},#{age},#{stuMessage}) delete from student where id = #{id} update student set stu_name=#{stuName},stu_no=#{stuNo},age=#{age},stu_message=#{stuMessage} where id = #{id}
4.6 service
package com.yl.mybatis.service;
import com.yl.mybatis.model.Student;
import java.util.List;
public interface StudentService {
Student getStudentById(Integer id);
Integer addStudent(Student student);
List getAllStudent();
Integer deleteById(Integer id);
Integer updateById(Student student);
}
4.7 serviceImpl
package com.yl.mybatis.service.impl;
import com.yl.mybatis.mapper.StudentMapper;
import com.yl.mybatis.model.Student;
import com.yl.mybatis.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class StudentServiceImpl implements StudentService {
@Autowired
private StudentMapper studentMapper;
@Override
public Student getStudentById(Integer id) {
return studentMapper.getStudentById(id);
}
@Override
public Integer addStudent(Student student) {
return studentMapper.addStudent(student);
}
@Override
public List getAllStudent() {
return studentMapper.getAllStudent();
}
@Override
public Integer deleteById(Integer id) {
return studentMapper.deleteById(id);
}
@Override
public Integer updateById(Student student) {
return studentMapper.updateById(student);
}
}
4.8 扫描mapper
5. mybatis整合多数据源
5.1 pom.xml
4.0.0 org.springframework.boot spring-boot-starter-parent 2.5.5 com.yl mybatisutil 0.0.1-SNAPSHOT mybatisutil Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter-web org.mybatis.spring.boot mybatis-spring-boot-starter 2.2.0 mysql mysql-connector-java runtime org.springframework.boot spring-boot-starter-test test src/main/java **/*.xml src/main/resources org.springframework.boot spring-boot-maven-plugin
5.2 application.properties
# 数据源配置 spring.datasource.one.username=root spring.datasource.one.password=root spring.datasource.one.jdbcurl=jdbc:mysql://localhost:3306/demo?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai spring.datasource.two.username=root spring.datasource.two.password=root spring.datasource.two.jdbcurl=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
5.3 实体类
package com.yl.mybatisutil.model;
import java.io.Serializable;
public class Student implements Serializable {
private Integer id;
private String stuName;
private String stuNo;
private Integer age;
private String stuMessage;
@Override
public String toString() {
return "Student{" +
"id=" + id +
", stuName='" + stuName + '\'' +
", stuNo='" + stuNo + '\'' +
", age=" + age +
", stuMessage='" + stuMessage + '\'' +
'}';
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getStuName() {
return stuName;
}
public void setStuName(String stuName) {
this.stuName = stuName;
}
public String getStuNo() {
return stuNo;
}
public void setStuNo(String stuNo) {
this.stuNo = stuNo;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getStuMessage() {
return stuMessage;
}
public void setStuMessage(String stuMessage) {
this.stuMessage = stuMessage;
}
}
5.4 mapper1
package com.yl.mybatisutil.mapper1;
import com.yl.mybatisutil.model.Student;
import java.util.List;
public interface StudentMapper1 {
List getAllStudent();
}
5.5 mapper2
package com.yl.mybatisutil.mapper2;
import com.yl.mybatisutil.model.Student;
import java.util.List;
public interface StudentMapper2 {
List getAllStudent();
}
5.6 mapper1.xml
5.7 mapper2.xml
5.8 数据源配置
package com.yl.mybatisutil.config;
import com.zaxxer.hikari.HikariDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
/**
* 多数据源配置
*/
@Configuration
public class DataSourceConfig {
@Bean
@ConfigurationProperties(prefix = "spring.datasource.one")
DataSource dsOne() {
return new HikariDataSource();
}
@Bean
@ConfigurationProperties(prefix = "spring.datasource.two")
DataSource dsTwo() {
return new HikariDataSource();
}
}
5.9 mybatis配置1
package com.yl.mybatisutil.config;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
/**
* mybatis的配置
*/
@Configuration
@MapperScan(basePackages = "com.yl.mybatisutil.mapper1",sqlSessionFactoryRef = "sqlSessionFactory1",sqlSessionTemplateRef = "sqlSessionTemplate1")
public class MyBatisConfigOne {
@Qualifier("dsOne")
@Autowired
DataSource dataSource;
@Bean
SqlSessionFactory sqlSessionFactory1() {
try {
SqlSessionFactory sqlSessionFactory = null;
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource);
sqlSessionFactory = sqlSessionFactoryBean.getObject();
return sqlSessionFactory;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
@Bean
SqlSessionTemplate sqlSessionTemplate1() {
return new SqlSessionTemplate(sqlSessionFactory1());
}
}
5.10 mybatis配置2
package com.yl.mybatisutil.config;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
/**
* mybatis的配置
*/
@Configuration
@MapperScan(basePackages = "com.yl.mybatisutil.mapper2",sqlSessionFactoryRef = "sqlSessionFactory2",sqlSessionTemplateRef = "sqlSessionTemplate2")
public class MyBatisConfigTwo {
@Qualifier("dsTwo")
@Autowired
DataSource dataSource;
@Bean
SqlSessionFactory sqlSessionFactory2() {
try {
SqlSessionFactory sqlSessionFactory = null;
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource);
sqlSessionFactory = sqlSessionFactoryBean.getObject();
return sqlSessionFactory;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
@Bean
SqlSessionTemplate sqlSessionTemplate2() {
return new SqlSessionTemplate(sqlSessionFactory2());
}
}
5.11 项目结构
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