springboot使用jdbcTemplate连接数据库
1.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.example</groupId>
<artifactId>spring-data_JpaAndJdbcTemplate</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-mybatis</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.10.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.21</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2.application.properties:
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
3.Student:
package com.example.springmybatis.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@Entity
public class Student {
@Id
@GeneratedValue
private String name;
@Column(nullable = true)
private int age;
@Column(nullable = true)
private String address;
private String collage;
private String sex;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getCollage() {
return collage;
}
public void setCollage(String collage) {
this.collage = collage;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
@Override
public String toString() {
return "Student{" +
"name='" + name + '\'' +
", age=" + age +
", address='" + address + '\'' +
", collage='" + collage + '\'' +
", sex='" + sex + '\'' +
'}';
}
}
4.UserService:
package com.example.springmybatis.service_jdbc;
import com.example.springmybatis.entity.Student;
public interface UserService {
void create(String name, Integer age);
void deleteByName(String name);
Integer getAllUsers();
void deleteAllUsers();
Student select(String name, int age);
}
5.UserServiceImpl:
package com.example.springmybatis.service_jdbc;
import com.example.springmybatis.entity.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Service;
import java.sql.ResultSet;
import java.sql.SQLException;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private JdbcTemplate jdbcTemplate;
@Override
public void create(String name, Integer age) {
jdbcTemplate.update("insert into student(NAME, AGE) values(?, ?)", name, age);
}
@Override
public void deleteByName(String name) {
jdbcTemplate.update("delete from student where NAME = ?", name);
}
@Override
public Integer getAllUsers() {
return jdbcTemplate.queryForObject("select count(1) from student", Integer.class);
}
@Override
public void deleteAllUsers() {
jdbcTemplate.update("delete from student");
}
@Override
public Student select(String name, int age) {
return jdbcTemplate.queryForObject("select name, age, address, collage, sex from student where NAME = ? and age = ?", new MyRowMapper(), name, age);
}
public class MyRowMapper implements RowMapper<Student> {
@Override
public Student mapRow(ResultSet resultSet, int i) throws SQLException {
String name = resultSet.getString("name");
int age = resultSet.getInt("age");
String address = resultSet.getString("address");
String collage = resultSet.getString("collage");
String sex = resultSet.getString("sex");
Student student = new Student();
student.setName(name);
student.setAddress(address);
student.setAge(age);
student.setCollage(collage);
student.setSex(sex);
return student;
}
}
}
6.UserController:
package com.example.springmybatis.Controller;
import com.example.springmybatis.entity.Student;
import com.example.springmybatis.service_jdbc.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController
public class UserController {
@Autowired
private UserService userService;
/**
* JdbcTemplate连接方式
* @param name
* @param age
* @return
* @throws Exception
*/
@RequestMapping(value = "/jdbc", method = RequestMethod.GET)
@ResponseBody
public Student GetNameJdbc(@RequestParam(value = "name", defaultValue = "易中天") String name
, @RequestParam(value = "age", defaultValue = "55") int age)throws Exception{
Student user = userService.select(name, age);
return user;
}
}
7.spring boot启动项:
package com.example.springmybatis;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringDataJpaAPP {
public static void main(String[] args) {
SpringApplication.run(SpringDataJpaAPP.class, args);
}
}
8.sql:
CREATE TABLE `student` (
`name` varchar(100) NOT NULL,
`age` int(10) NOT NULL,
`address` varchar(100) NOT NULL,
`collage` varchar(100) NOT NULL,
`sex` varchar(10) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8