SpringBoot整合jdbcTemplate

package com.zn.entity;
public class Student {
    private Integer stu_id;
    private String stu_name;

    @Override
    public String toString() {
        return "Student{" +
                "stu_id=" + stu_id +
                ", stu_name=‘" + stu_name + ‘\‘‘ +
                ‘}‘;
    }

    public Student() {
    }

    public Student(String stu_name) {
        this.stu_name = stu_name;
    }

    public Student(Integer stu_id, String stu_name) {
        this.stu_id = stu_id;
        this.stu_name = stu_name;
    }


    public Integer getStu_id() {
        return stu_id;
    }

    public void setStu_id(Integer stu_id) {
        this.stu_id = stu_id;
    }

    public String getStu_name() {
        return stu_name;
    }

    public void setStu_name(String stu_name) {
        this.stu_name = stu_name;
    }
}

package com.zn.dao;

import com.zn.entity.Student;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository;

import javax.annotation.Resource;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

@Repository
public class StudentDao {

    //导入JDBCTemplate模板
    @Resource
    JdbcTemplate jdbcTemplate;

    public Student selectByName(String stu_name){
        String sql="select * from studentinfo where stu_name=?";
        RowMapper<Student> rowMapper=new BeanPropertyRowMapper<Student>(Student.class);
        Student student=jdbcTemplate.queryForObject(sql,rowMapper,stu_name);
        return student;
    }


    //增加数据
    public int insertStudent(Student student) {
        return jdbcTemplate.update("insert into studentinfo(stu_name) values(?)",student.getStu_name());
    }

    //修改数据
    public int updateStudent(Student student) {
        return jdbcTemplate.update("update studentinfo set stu_name=? where stu_id=?",student.getStu_name(),student.getStu_id());
    }

    //删除数据
    public int deleteStudent(Integer id) {
        return jdbcTemplate.update("delete from studentinfo where stu_id=?",id);
    }

    //查询数据
    public List<Student> findAll() {
        //封装行数据映射
        RowMapper<Student> rowMapper=new RowMapper<Student>() {
            @Override
            public Student mapRow(ResultSet resultSet, int i) throws SQLException {

                Student students=new Student(resultSet.getInt("stu_id"),resultSet.getString("stu_name"));
                return students;
            }
        };
        return jdbcTemplate.query("select * from studentinfo", rowMapper);
    }
}

package com.zn.service;

import com.zn.dao.StudentDao;
import com.zn.entity.Student;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

@Service
public class StudentService {
    @Resource
    StudentDao studentDao;

    public Student selectByName(String stu_name){
        return studentDao.selectByName(stu_name);
    }

    //增加数据
    public int insertStudent(Student student) {
        return studentDao.insertStudent(student);
    }

    //修改数据
    public int updateStudent(Student student) {
        return studentDao.updateStudent(student);
    }

    //删除数据
    public int deleteStudent(Integer id) {
        return studentDao.deleteStudent(id);
    }

    //查询数据
    public List<Student> findAll(){
        return studentDao.findAll();
    }
}

package com.zn.controller;

import com.zn.entity.Student;
import com.zn.service.StudentService;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;

@RestController
public class StudentController {

    @Resource
    StudentService studentService;

    //根据名字查询单条数据
    @RequestMapping("/selectByName")
    public Student selectByName(String stu_name){
        return studentService.selectByName(stu_name);
    }

    //添加数据
    @RequestMapping("/insertStudent")
    public int insertStudent(){
        return studentService.insertStudent(new Student("刘三姐"));
    }

    //修改数据
    @RequestMapping("/updateStudent")
    public int updateStudent(){
        return studentService.updateStudent(new Student(5,"小飒"));
    }

    //删除数据
    @RequestMapping("/deleteStudent")
    public int deleteStudent(){
        return studentService.deleteStudent(3);
    }

    //查询数据
    @RequestMapping("/findAll")
    public List<Student> findAll(){
        return studentService.findAll();
    }
}