SpringBoot(十五)-----Springboot配合JDBCTemplate实现增删改查

今天用Springboot配合JDBCTemplate写一个增删改查的小例子

构建数据库

create table Student(
Sid Integer,
Sno char(10),
Sname char(10),
Sgrade Integer,
primary key(Sid)
);

构建项目

加入JDBCTemplate依赖包

<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>
  <groupId>myspringboot002</groupId>
  <artifactId>myspringboot002</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <parent>
  	<groupId>org.springframework.boot</groupId>
  	<artifactId>spring-boot-starter-parent</artifactId>
  	<version>1.3.3.RELEASE</version>
  </parent>
  <dependencies>
  	<dependency>
  		<groupId>org.springframework.boot</groupId>
  		<artifactId>spring-boot-starter-web</artifactId>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework.boot</groupId>
  		<artifactId>spring-boot-starter-freemarker</artifactId>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework.boot</groupId>
  		<artifactId>spring-boot-starter-jdbc</artifactId>
  	</dependency>
  	<dependency>
  		<groupId>org.springframework.boot</groupId>
  		<artifactId>spring-boot-starter-data-jpa</artifactId>
  	</dependency>
  	<dependency>
  		<groupId>mysql</groupId>
  		<artifactId>mysql-connector-java</artifactId>
  		<version>8.0.17</version>
  	</dependency>
  </dependencies>
</project>

配置文件application.properties

spring.datasource.url=jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8&useSSL=false&serverTimezone = GMT
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

构建Student实体类

Student.java

package com.zk.Dao;


import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity(name="Student")
@Table(name="student")
public class Student {
	@Id 
	@GeneratedValue
	private Integer Sid;
	@Column
	private String Sname;
	@Column
	private String Sno;
	@Column
	private Integer Sgrade;
	
	
	
	public Integer getSid() {
		return Sid;
	}
	public void setSid(Integer sid) {
		Sid = sid;
	}
	public String getSname() {
		return Sname;
	}
	public void setSname(String sname) {
		Sname = sname;
	}
	public String getSno() {
		return Sno;
	}
	public void setSno(String sno) {
		Sno = sno;
	}
	public Integer getSgrade() {
		return Sgrade;
	}
	public void setSgrade(Integer sgrade) {
		Sgrade = sgrade;
	}
}

　然后是Controller层，

UserController.java

package com.zk.Controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.zk.Dao.Student;
import com.zk.Service.UserService;

@RestController
public class UserController {
	@Autowired
	private UserService userService;
	
	@RequestMapping("/createUser")
	private String createUser(String Sname,String Sno,Integer Sgrade) {
		userService.createUser(Sname,Sno,Sgrade);
		return "success";
	}
	
	@RequestMapping("/updateUser")
	private String updateUser(String Sname,String Sno,Integer Sgrade,String Sid) {
		userService.updateUser(Sname,Sno,Sgrade,Sid);
		return "success";
	}
	
	@RequestMapping("/deleteUser")
	private String deleteUser(String Sname,String Sno,Integer Sgrade) {
		userService.deleteUser(Sno);
		return "success";
	}
	
	@RequestMapping("/getUserBySno")
	private String getUserBySno(String Sname,String Sno,Integer Sgrade) {
		Student student=userService.getUserBySno(Sno);
		System.out.println(student.getSname());
		System.out.println(student.getSno());
		System.out.println(student.getSgrade());
		return "success";
	}
}

　　然后是Service层

UserService.java

package com.zk.Service;

import com.zk.Dao.Student;

public interface UserService {
	public void createUser(String Sname,String Sno,Integer Sgrade);
	public void updateUser(String Sname,String Sno,Integer Sgrade,String Sid);
	public void deleteUser(String Sno);
	public Student getUserBySno(String Sno);
}

UserServiceImpl.java

package com.zk.Service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.ResultSetExtractor;
import org.springframework.stereotype.Service;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;

import com.zk.Dao.Student;

@Service
public class UserServiceImpl implements UserService {
	@Autowired
	private JdbcTemplate jdbcTemplate;

	public void createUser(String Sname, String Sno, Integer Sgrade) {
		System.out.println("createUsers");
		jdbcTemplate.update("insert into student(Sname,Sno,Sgrade) value(?,?,?)", Sname, Sno, Sgrade);
		// jdbcTemplate.execute("Select * from Student");
		System.out.println("创建用户成功");
	}

	public void updateUser(String Sname, String Sno, Integer Sgrade, String Sid) {
		System.out.println("updateUsers");
		jdbcTemplate.update("update student set Sname=?,Sno=?,Sgrade=? where Sid=?", Sname, Sno, Sgrade, Sid);
		// jdbcTemplate.execute("Select * from Student");
		System.out.println("创建用户成功");
	}

	public void deleteUser(String Sno) {
		System.out.println("deleteUsers");
		jdbcTemplate.update("delete from student where Sno=?", Sno);
		// jdbcTemplate.execute("Select * from Student");
		System.out.println("删除用户成功");
	}

	public Student getUserBySno(String Sno) {
		List<Student> list = jdbcTemplate.query("select * from student where Sno = ?", new Object[] { Sno },
				new BeanPropertyRowMapper<>(Student.class));
		if (!list.isEmpty()) {
			Student Student = list.get(0);
			System.out.println("Sname:"+Student.getSname()+"\t"+"Sno:"+Student.getSno()+"\t"+"Sgrade:"+Student.getSgrade());
			return Student;
		}
		return null;
	}
}

　　启动类SpringBootApplicationSixth

package com.zk.myspringboot006;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

@ComponentScan(basePackages={"com.zk.Controller","com.zk.Service"})
@EnableAutoConfiguration
public class SpringBootApplicationSixth {
	public static void main(String[]args){
        SpringApplication.run(SpringBootApplicationSixth.class, args);
    }
    public static void run(String...arg0) {
        System.out.println("Hello world from Command Line Runner");
    }
}

　　程序执行

增加用户