第九讲
1. JdbcTemplate是用来对数据库进行操作（增删改查）的工具类
XML配置如下是
2.增删改查应用
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);
}
@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;
}
}
