package com.cy.model;

public class Student {
    private int id;
    private String name;
    private int age;
    
    public Student() {
        super();
        // TODO Auto-generated constructor stub
    }

    public Student(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }
    
    public Student(int id, String name, int age) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public int 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 int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
    }
    
    
}

package com.cy.dao;

import java.util.List;

import com.cy.model.Student;

public interface StudentDao {
    public int addStudent(Student student);
    
    public int updateStudent(Student student);
    
    public int deleteStudent(int id);
    
    public List<Student> findStudents();
}

package com.cy.dao.impl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;

import com.cy.dao.StudentDao;
import com.cy.model.Student;

public class StudentDaoImpl implements StudentDao {
    
    private JdbcTemplate jdbcTemplate;
    
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    @Override
    public int addStudent(Student student) {
        String sql = "insert into t_student values (null, ?, ?)";
        Object params[] = new Object[]{student.getName(), student.getAge()};
        return jdbcTemplate.update(sql, params);
    }

    @Override
    public int updateStudent(Student student) {
        String sql = "update t_student set name=?, age=? where id = ?";
        Object params[] = new Object[]{student.getName(), student.getAge(), student.getId()};
        return jdbcTemplate.update(sql, params);
    }

    @Override
    public int deleteStudent(int id) {
        String sql = "delete from t_student where id = ?";
        Object params[] = new Object[]{id};
        return jdbcTemplate.update(sql, params);
    }
    
    /**
     * 查询所有的学生
     */
    @Override
    public List<Student> findStudents() {
        String sql = "select * from t_student";
        final List<Student> studentList = new ArrayList<Student>();
        jdbcTemplate.query(sql, new RowCallbackHandler(){

            @Override
            public void processRow(ResultSet rs) throws SQLException {
                Student student = new Student();
                student.setId(rs.getInt("id"));
                student.setName(rs.getString("name"));
                student.setAge(rs.getInt("age"));
                studentList.add(student);
            }
            
        });
        return studentList;
    }

}

package com.cy.service;

import java.util.List;

import com.cy.model.Student;

public interface StudentService {

    public int addStudent(Student student);
    
    public int updateStudent(Student student);
    
    public int deleteStudent(int id);
    
    public List<Student> findStudents();
}

package com.cy.service.impl;

import java.util.List;

import com.cy.dao.StudentDao;
import com.cy.model.Student;
import com.cy.service.StudentService;

public class StudentServiceImpl implements StudentService{

    private StudentDao studentDao;
    
    public void setStudentDao(StudentDao studentDao) {
        this.studentDao = studentDao;
    }

    @Override
    public int addStudent(Student student) {
        return studentDao.addStudent(student);
    }

    @Override
    public int updateStudent(Student student) {
        return studentDao.updateStudent(student);
    }

    @Override
    public int deleteStudent(int id) {
        return studentDao.deleteStudent(id);
    }

    @Override
    public List<Student> findStudents() {
        return studentDao.findStudents();
    }

    

}

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_spring
jdbc.username=root
jdbc.password=root

package com.cy.test;

import java.util.List;

import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.cy.model.Student;
import com.cy.service.StudentService;

public class T {
    private ApplicationContext ac;
    
    @Before
    public void setUp() throws Exception {
        ac=new ClassPathXmlApplicationContext("beans.xml");
    }
    
    @Test
    public void addStudent() {
        StudentService studentService=(StudentService)ac.getBean("studentService");
        int addNums=studentService.addStudent(new Student("晶", 1));
        if(addNums==1){
            System.out.println("添加成功");
        }
    }
    
    @Test
    public void updateStudent() {
        StudentService studentService=(StudentService)ac.getBean("studentService");
        int updateNums=studentService.updateStudent(new Student(4, "杨静", 10));
        if(updateNums==1){
            System.out.println("修改成功");
        }
    }
    
    @Test
    public void deleteStudent() {
        StudentService studentService=(StudentService)ac.getBean("studentService");
        int deleteNums = studentService.deleteStudent(4);
        if(deleteNums==1){
            System.out.println("删除成功！");
        }
    }
    
    @Test
    public void findStudents() {
        StudentService studentService=(StudentService)ac.getBean("studentService");
        List<Student> studentList = studentService.findStudents();
        for(Student student : studentList){
            System.out.println(student);
        }
    }
}