spring对jdbc的支持
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_spring
jdbc.username=root
jdbc.password=123456
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;
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
String sql="select * from t_student";
final List
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;
}
}
import java.util.List;
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
return studentDao.findStudents();
}
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
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("王五", 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(8,"王五2", 2));
if(updateNums==1){
System.out.println("更新成功");
}
}
@Test
public void deleteStudent() {
StudentService studentService=(StudentService)ac.getBean("studentService");
int deleteNums=studentService.deleteStudent(8);
if(deleteNums==1){
System.out.println("删除成功");
}
}
@Test
public void findStudents() {
StudentService studentService=(StudentService)ac.getBean("studentService");
List
for(Student student:studentList){
System.out.println(student);
}
}
}
支持命名参数变量
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
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 org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
public class StudentDaoImpl implements StudentDao{
private NamedParameterJdbcTemplate namedParameterJdbcTemplate;
public void setNamedParameterJdbcTemplate(
NamedParameterJdbcTemplate namedParameterJdbcTemplate) {
this.namedParameterJdbcTemplate = namedParameterJdbcTemplate;
}
@Override
public int addStudent(Student student) {
String sql="insert into t_student values(null,:name,:age)";
MapSqlParameterSource sps=new MapSqlParameterSource();
sps.addValue("name", student.getName());
sps.addValue("age", student.getAge());
return namedParameterJdbcTemplate.update(sql,sps);
}
@Override
public int updateStudent(Student student) {
String sql="update t_student set name=:name,age=:age where id=:id";
MapSqlParameterSource sps=new MapSqlParameterSource();
sps.addValue("name", student.getName());
sps.addValue("age", student.getAge());
sps.addValue("id", student.getId());
return namedParameterJdbcTemplate.update(sql,sps);
}
@Override
public int deleteStudent(int id) {
String sql="delete from t_student where id=:id";
MapSqlParameterSource sps=new MapSqlParameterSource();
sps.addValue("id", id);
return namedParameterJdbcTemplate.update(sql,sps);
}
@Override
public List
String sql="select * from t_student";
final List
namedParameterJdbcTemplate.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;
}
}
import java.util.List;
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
return studentDao.findStudents();
}
}