public Student mapRow(ResultSet resultSet, int i) throws SQLException {
Student student = new Student();
student.setSid(resultSet.getInt("sid"));
student.setName(resultSet.getString("sname"));
student.setAge(resultSet.getInt("age"));
student.setSex(resultSet.getString("sex"));
student.setAddress(resultSet.getString("address"));
return student;
}
}
StudentDAO类：
package org.zero01.dao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;
import org.zero01.pojo.Student;
import javax.sql.DataSource;
import java.util.List;
@Component("stuDAO")
public class StudentDAO extends JdbcTemplate implements DAO {
@Autowired
// 重写父类的setDataSource来设置数据源对象
public void setDataSource(DataSource dataSource) {
super.setDataSource(dataSource);
}
// 插入单行数据
public int insert(Student student) {
String sql = "INSERT INTO student(sname,age,sex,address) VALUES (?,?,?,?)";
int row = update(sql, student.getName(), student.getAge(), student.getSex(), student.getAddress());
return row;
}
// 根据id进行删除
public int delete(int sid) {
return update("DELETE FROM student WHERE sid=?", sid);
}
// 查询多行数据
public List<Student> selectAll() {
// 查询多个对象就需要自己传递映射类进行映射
List<Student> studentList = query("SELECT * FROM student", new StudentMapper());
return studentList;
}
// 分页查询数据
public List<Student> selectByLimit(int start, int end) {
// 查询多个对象就需要自己传递映射类进行映射
List<Student> studentList = query("SELECT * FROM student LIMIT " + start + "," + end, new StudentMapper());
return studentList;
}
// 根据id查询单行数据
public Student selectById(int sid) {
// 存储参数
Object[] objects = {sid};
Student student = queryForObject("SELECT * FROM student where sid=?", objects, new StudentMapper());
return student;
}
// 查询表的总行数
public long countAll() {
Long countNumber = queryForObject("SELECT count(*) FROM student", Long.class);
return countNumber;
}
// 更新单行数据
public int update(Student student) {
String sql = "UPDATE student SET sname=?,age=?,sex=?,address=? WHERE sid=?";
return update(sql, student.getName(), student.getAge(), student.getSex(), student.getAddress(), student.getSid());
}
}
如上，可以看到，通过使用Spring提供的JdbcTemplate，我们只需要编写具体的sql语句即可，比起编写普通的JDBC代码要简洁许多，也没有出现多余的代码。当项目不需要使用到Mybatis、Hibernate等框架时，使用JdbcTemplate也不错。