#18.스프링프레임워크 & 마이바티스 (Spring Framework, MyBatis)_국비지원IT학원/실업자/재직자환급교육/자바/스프링/마이바티스학원추천

스프링프레임워크 & 마이바티스
(Spring Framework, MyBatis)
4-3-5. Spring JDBC에서 DB 접근하는 방법 – SqlUpdate
 재사용 가능한 SQL Update 구문을 생성하며, 이를 위해 SqlUpdate 클래스를 상속받아서 구
현해야 한다.
 SqlUpdate를 상속받은 하위 클래스의 생성자에서 SQL 쿼리 구문(DML : insert, update,
delete), 파라미터를 생성하고 compile() 메소드를 호출하여 컴파일 한다. 마지막으로 update()
메소드를 호출하여 해당 DML 쿼리를 실행한다.
public class PersonUpdate extends SqlUpdate {
public PersonUpdate(final DataSource ds) {
setDataSource(ds);//SqlUpdate의 메소드 호출
setSql("update Person set firstname = ?, lastname = ? where id = ?"); //SqlUpdate 메소드
호출
declareParameter(new SqlParameter(Types.VARCHAR)); //SqlUpdate 메소드
호출
declareParameter(new SqlParameter(Types.VARCHAR));
declareParameter(new SqlParameter(Types.INTRGER));
compile(); //SqlUpdate의 메소드 호출
}
//update 구문 실행
public int run(final Person person) {
Object[] params =
new Object[] {
person.getFirstName(),
person.getLastName(),
person.getId()};
return update(params);

}
}
public class PersonInsert extends SqlUpdate {
public PersonInsert(final DataSource ds) {
setDataSource(ds);
setSql("insert into Person(id, firstname, lastname) values(?, ?, ?)");
declareParameter(new SqlParameter(Types.INTEGER));
compile();
}
// insert 구문 실행
public int run(final Person person) {
Object[] params = new Object[] { pserson.getId(),
person.getFirstName(),
person.getLastName()};
return update(params);
}
}
4-3-6. Spring JDBC에서 DB 접근하는 방법 – StoredProcedure
 Spring JDBC의 StoredProcedure를 상속받아서 서버쪽의 저장함수나 프러시저에 접근 가능하
다.
[Emp.java]
package edu.onj.function2;
public class Emp {
private String empno;
private String ename;
private String sal;
public Emp() {}
public Emp(String empno, String ename, String sal) {
this.empno = empno;
this.ename = ename;

this.sal = sal;
}
public void setEmpno(String empno) {
this.empno = empno;
}
public void setEname(String ename) {
this.ename = ename;
}
public void setSal(String sal) {
this.sal = sal;
}
public String getEmpno() {
return empno;
public String getEname() {
return ename;
}
public String getSal() {
return sal;
}
}
[EmpDao.java]
import java.util.List;
import javax.sql.DataSource;
public interface EmpDao {
public void setDataSource(DataSource ds);
public List<Emp> listEmp(Integer deptno);
}
[EmpMapper.java]
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;
public class EmpMapper implements RowMapper<Emp> {

@Override
public Emp mapRow(ResultSet rs, int rowNum) throws SQLException {
Emp emp = new Emp();
emp.setEmpno(rs.getInt("empno"));
emp.setEname(rs.getString("ename"));
emp.setSal(rs.getInt("sal"));
return emp;
}
}
[EmpJDBCTemplate.java]
import java.sql.Types;
import java.util.*;
import oracle.jdbc.OracleTypes;
import org.springframework.jdbc.core.SqlOutParameter;
import org.springframework.jdbc.core.SqlParameter;
import org.springframework.jdbc.object.StoredProcedure;
public class EmpJDBCTemplate extends StoredProcedure implements EmpDao {
private DataSource dataSource;
private static final String SQL = "getEmp";
public EmpJDBCTemplate(DataSource dataSource) {
super(dataSource, SQL);
setFunction(true);
declareParameter(new SqlOutParameter("emp_cursor", OracleTypes.CURSOR, new
EmpMapper()));
declareParameter(new SqlParameter("v_deptno", Types.INTEGER));
}
@Override
public List<Emp> listEmp(Integer deptno) {
Map<String, Object> resultSet = execute(deptno);
ArrayList<Emp> list = (ArrayList) resultSet.get("emp_cursor");
return list;
}
}

[JdbcClient.java]
import java.util.ArrayList;
import onj.edu.jdbc1.Customer;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class JdbcClient {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("jdbc2.xml");
EmpJDBCTemplate empJDBCTemplate
=(EmpJDBCTemplate)ctx.getBean("empJDBCTemplate");
ArrayList<Emp> list = new ArrayList<Emp>();
list = (ArrayList<Emp>) empJDBCTemplate.listEmp(20);
for (Emp emp:list){
System.out.println("empno --> "+emp.getEmpno()+"
ename --> "+emp.getEname()+" sal --> "+emp.getSal() );
}
}
}
[jdbc2.xml]
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springfra
mework.org/schema/beans/spring-beans-4.2.xsd">
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroymethod="close">
<property name="driverClassName">
<value>oracle.jdbc.driver.OracleDriver</value>
</property>
<property name="url">
<value>jdbc:oracle:thin:@192.168.0.27:1521:onj</value>
</property>
<property name="username">
<value>scott</value>

</property>
<property name="password">
<value>tiger</value>
</property>
</bean>
<bean id="empJDBCTemplate" class=" edu.onj.function2.EmpJDBCTemplate">
<constructor-arg ref="dataSource"/>
</bean>
</beans>
4-3-7. 오라클 시퀀스를 위한 DataFieldMaxValueIncrementer
 DataFieldMaxValueIncrementer 인터페이스는 DB 테이블의 칼럼값을 MAX VALUE까지 자동증
분 하기 위한 용도로 사용되는 스프링의 인터페이스 이다. 오라클 DB라면 시퀀스를 스프링에
서 사용할 수 있게 해 준다.
 인터페이스의 구조는 다음과 같다.
public interface DataFieldMaxValueIncrementer {
public int nextIntValue() throws DataAccessException;
public long nextLongValue() throws DataAccessException;
public String nextStringValue() throws DataAccessException;
}
 스프링배치에서는 기본적으로 , Oracle, DB2, Derby, Hsql, Mysql, Postgres, MS-SQL Server,
Sybase 등의 주요 DB에 대한 DataFieldMaxValueIncrementer의 구현 클래스가 제공되고 있다.
 사용절차는 다음과 같다.
1. Spring 설정파일에서 사용할 incrementer에 대해 정의
DB2는 SequenceMaxValueIncrementer, MySQL은 MySQLMaxValueIncrementer, PostgreSQL이라면
PostgreSQLSequenceMaxValueIncrementer, 오라클인 경우 OracleSequenceMaxValueIncrementer를
사용한다.
<bean id="incrementer"
class="org.springframework.jdbc.support.incrementer.OracleSequenceMaxValueIncrementer">
<property name="dataSource">
<ref bean="dataSource"/>
</property>

<property name="incrementerName">
<value>SEQ_SID</value> <!– 오라클에 만들어 놓은 시퀀스 이름 -
</property>
</bean>
2. Insert SQL문을 실행하는 부분에서 정의된 incrementer 사용
private DataFieldMaxValueIncrementer incrementer;
public void setIncrementer(DataFieldMaxValueIncrementer incrementer) {
this.incrementer = incrementer;
}
….
String strQuery = "INSERT INTO BOARD VALUES ( ?, ?, ?, ?, ?, sysdate) ";
int currentSid =new Integer(incrementer.nextIntValue());
 사용 예제
[CustomerDao.java]
package onj.edu.jdbc1;
public interface CustomerDAO {
public void setDataSource(DataSource ds);
public void create(Integer id, String name, Integer age);
public Customer getCustomer(Integer id);
public List<Customer> listCustomer();
public void delete(Integer id);
public void update(Integer id, Integer age);
}
[CustomerJDBCTemplate.java]
import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.jdbc.support.incrementer.DataFieldMaxValueIncrementer;
public class CustomerJDBCTemplate implements CustomerDAO {
private DataSource dataSource;
private JdbcTemplate jdbcTemplate;
private DataFieldMaxValueIncrementer incrementer;
public void setIncrementer(DataFieldMaxValueIncrementer incrementer) {
this.incrementer = incrementer;
}
public void setDataSource(DataSource ds) {
this.dataSource = ds;
this.jdbcTemplate = new JdbcTemplate(ds);
}
public void create(Integer id, String name, Integer age) {
String SQL = "insert into customer(id, name, age) values (?, ?, ?)";
jdbcTemplate.update(SQL, new Integer(incrementer.nextIntValue()), name, age);
System.out.println("<<<Customer insert ok ::: " + name + "," + age);
}
public Customer getCustomer(Integer id) {
String SQL = "select * from customer where id = ?";
Customer customer = jdbcTemplate.queryForObject(SQL, new Object[] { id }, new
CustomerMapper());
return customer;
}
public List<Customer> listCustomer() {
String SQL = "select * from customer";
List<Customer> customer = jdbcTemplate.query(SQL, new CustomerMapper());
return customer;
}
public void delete(Integer id) {
String SQL = "delete from customer where id = ?";
jdbcTemplate.update(SQL, id);
System.out.println("<<< customer delete ok ::: id = " + id);

}
public void update(Integer id, Integer age) {
String SQL = "update customer set age = ? where id = ?";
jdbcTemplate.update(SQL, age, id);
System.out.println("<<< customer update ok ::: id = " + id);
}
}
[CustomerMapper.java]
import java.sql.ResultSet;
import org.springframework.jdbc.core.RowMapper;
public class CustomerMapper implements RowMapper<Customer>{
@Override
public Customer mapRow(ResultSet rs, int arg1) throws SQLException {
Customer customer = new Customer();
customer.setId(rs.getInt("id"));
customer.setName(rs.getString("name"));
customer.setAge(rs.getInt("age"));
return customer;
}
}
[jdbc3.xml]
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
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"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:util="http://www.springframework.org/schema/util"
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-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc-4.2.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-4.2.xsd">
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName">
<value>oracle.jdbc.driver.OracleDriver</value>
</property>
<property name="url">
<value>jdbc:oracle:thin:@192.168.0.27:1521:onj</value>
</property>
<property name="username">
<value>scott</value>
</property>
<property name="password">
<value>tiger</value>
</property>
</bean>
<bean id="customerJDBCTemplate" class="onj.edu.jdbc1.CustomerJDBCTemplate">
<property name="dataSource" ref='dataSource'></property>
<property name="incrementer" ref = "incrementer"></property>
</bean>
<bean id="incrementer"
class="org.springframework.jdbc.support.incrementer.OracleSequenceMaxValueIncremen
ter">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="incrementerName">
<value>SEQ_SID</value> 
</property>
</bean>
</beans>

[JdbcClient.java]
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class JdbcClient {
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("jdbc3.xml");
CustomerJDBCTemplate jdbcTemplate =
(CustomerJDBCTemplate)ctx.getBean("customerJDBCTemplate");
jdbcTemplate.create(4, "4길동", 4); jdbcTemplate.create(5, "5길동", 5);
jdbcTemplate.create(6, "6길동", 6);
List <Customer> customers = jdbcTemplate.listCustomer();
System.out.println("------------------ all select ------------------");
for(Customer customer:customers){
System.out.println("id ----> "+customer.getId());
System.out.println("name ----> "+customer.getName());
System.out.println("age ----> "+customer.getAge());
}
jdbcTemplate.update(4, 99);
Customer customer = jdbcTemplate.getCustomer(4);
System.out.println("--------- 변경된 4번 데이터 -------------");
System.out.println("id ----> "+customer.getId());
System.out.println("name ----> "+customer.getName());
System.out.println("age ----> "+customer.getAge());
jdbcTemplate.delete(5);
customers = jdbcTemplate.listCustomer();
System.out.println("--------- 5번 삭제 후 ----------");
for(Customer customer1:customers){
System.out.println("id ----> "+customer1.getId());
System.out.println("name ----> "+customer1.getName());

System.out.println("age ----> "+customer1.getAge());
}
}
}

#18.스프링프레임워크 & 마이바티스 (Spring Framework, MyBatis)_국비지원IT학원/실업자/재직자환급교육/자바/스프링/마이바티스학원추천

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#18.스프링프레임워크 & 마이바티스 (Spring Framework, MyBatis)_국비지원IT학원/실업자/재직자환급교육/자바/스프링/마이바티스학원추천