JdbcTemplate增删改查案例
架包
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
实体类
public class Student implements Serializable {
private Integer stuId;
private String stuName;
private String stuAddress;
public Integer getStuId() {
return stuId;
}
public void setStuId(Integer stuId) {
this.stuId = stuId;
}
public String getStuName() {
return stuName;
}
public void setStuName(String stuName) {
this.stuName = stuName;
}
public String getStuAddress() {
return stuAddress;
}
public void setStuAddress(String stuAddress) {
this.stuAddress = stuAddress;
}
}
创建jdbc.properties文件
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/smbms?useUniCode=true&characterEncoding=utf-8 jdbc.username=root jdbc.password=123
dao层接口
public interface IStudentDao {
//查询
public List<Student> getAllStudent();
//添加
public int addStudent(Student student);
//修改
public int updateStudent(Student student);
//删除
public int dStudent(Integer stuid);
}
dao层实现类
@Repository
public class IStudentDaoImpl implements IStudentDao {
@Resource
private JdbcTemplate jdbcTemplate;
@Override
public List<Student> getAllStudent() {
//获取JDBC模板对象
String sql="select * from student";
//执行查询操作
/*List<Student> stuList = jdbcTemplate.query(sql, new RowMapper<Student>() {
*//**
*
* @param rs 结果集
* @param rowNum 当前的记录行
* @return 方法返回值，返回泛型
* @throws SQLException
*//*
@Override
public Student mapRow(ResultSet rs, int rowNum) throws SQLException {
Student stu = new Student();
stu.setStuId(rs.getInt("stuid"));
stu.setStuName(rs.getString("stuname"));
stu.setStuAddress(rs.getString("stuaddress"));
return stu;
}
});*/
RowMapper<Student> rowMapper=new BeanPropertyRowMapper<>(Student.class);
List<Student> stuList = jdbcTemplate.query(sql, rowMapper);
return stuList;
}
@Override
public int addStudent(Student student) {
//添加
String sql="insert student values(default,?,?)";
int i = jdbcTemplate.update(sql, student.getStuName(),student.getStuAddress());
return i;
}
@Override
public int updateStudent(Student student) {
//修改
String sql="update student set stuname=?,stuaddress=? where stuid=?";
int update = jdbcTemplate.update(sql, student.getStuName(), student.getStuAddress(),student.getStuId());
return update;
}
@Override
public int dStudent(Integer stuid) {
//删除
String sql="delete from student where stuid=6";
int count = jdbcTemplate.update(sql);
return count;
}
}
service层接口
public interface IStudentService {
//查询
public List<Student> getAllStudent();
//添加
public Integer addStudent(Student student);
//修改
int updateStudent(Student student);
//删除
public int dStudent(Integer stuid);
}
service层实现类
@Service("iStudentService")
public class IStudentServiceImpl implements IStudentService {
//植入Dao层对象
@Resource
private IStudentDao iStudentDao;
@Override
public List<Student> getAllStudent() {
return iStudentDao.getAllStudent();
}
@Override
public Integer addStudent(Student student) {
return iStudentDao.addStudent(student);
}
@Override
public int updateStudent(Student student) {
return iStudentDao.updateStudent(student);
}
@Override
public int dStudent(Integer stuid) {
return iStudentDao.dStudent(stuid);
}
public IStudentDao getiStudentDao() {
return iStudentDao;
}
public void setiStudentDao(IStudentDao iStudentDao) {
this.iStudentDao = iStudentDao;
}
}
创建applicationContext.xml文件
<!--扫描注解-->
<context:component-scan base-package="com.spring"/>
<!--加载配置文件-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!--DataSource供模板调用
DriverManagerDataSource：spring提供管理数据源的
c3p0数据源 dbcp数据源
-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!--植入JDBCTemplate-->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"/>
</bean>
测试类
public class Testss {
@Test
public void getAllStudent() {
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
IStudentService iStudentService = (IStudentService) ctx.getBean("iStudentService");
List<Student> allStudent = iStudentService.getAllStudent();
for (Student stu : allStudent) {
System.out.println(stu.getStuName());
}
}
@Test
public void getaddStudent() {
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
IStudentService iStudentService = (IStudentService) ctx.getBean("iStudentService");
Student student = new Student();
student.setStuName("张三");
student.setStuAddress("北京市海淀区");
int addStudent = iStudentService.addStudent(student);
System.out.println("添加成功");
}
@Test
public void getupdateStudent() {
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
IStudentService iStudentService = (IStudentService) ctx.getBean("iStudentService");
Student student = new Student();
student.setStuName("李四");
student.setStuAddress("北京市海淀区");
student.setStuId(5);
int updateStudent = iStudentService.updateStudent(student);
System.out.println("修改成功");
}
@Test
public void getdStudent() {
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
IStudentService iStudentService = (IStudentService) ctx.getBean("iStudentService");
int delaccount = iStudentService.dStudent(6);
System.out.println("删除成功");
}
}