BasicDataSource from apache : BasicDataSource « Spring « Java

1. Java
2. Spring
3. BasicDataSource

BasicDataSource from apache

       
File: EmployeeDaoImpl.java

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.sql.DataSource;

import org.springframework.jdbc.core.SqlParameter;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.jdbc.object.MappingSqlQuery;
import org.springframework.jdbc.support.nativejdbc.SimpleNativeJdbcExtractor;

public class EmployeeDaoImpl extends JdbcDaoSupport {
  private LastNameAndAgeQuery lastNameAndAgeQuery;

  protected void initDao() throws Exception {
    super.initDao();
    getJdbcTemplate().setNativeJdbcExtractor(new SimpleNativeJdbcExtractor());
    lastNameAndAgeQuery = new LastNameAndAgeQuery(getDataSource());

  }

  public List getEmployeesForLastNameAndAge(String lastName, Integer age) {
    return lastNameAndAgeQuery.execute(new Object[] { lastName, age });
  }

}

class LastNameAndAgeQuery extends MappingSqlQuery {
  private static final String SQL_QUERY = "SELECT * FROM employee WHERE name_last = ? AND age = ?";

  public LastNameAndAgeQuery(DataSource ds) {
    super(ds, SQL_QUERY);
    declareParameter(new SqlParameter("name_last", Types.VARCHAR));
    declareParameter(new SqlParameter("age", Types.INTEGER));
    compile();
  }

  protected Object mapRow(ResultSet resultSet, int row) throws SQLException {
    Employee employee = new Employee();
    employee.setId(resultSet.getInt("id"));
    employee.getName().setFirst(resultSet.getString("name_first"));
    employee.getName().setMiddle(resultSet.getString("name_middle"));
    employee.getName().setLast(resultSet.getString("name_last"));
    employee.getAddress().setLine1(resultSet.getString("address_line1"));
    employee.getAddress().setLine2(resultSet.getString("address_line2"));
    employee.getAddress().setCity(resultSet.getString("address_city"));
    employee.getAddress().setState(resultSet.getString("address_state"));
    employee.getAddress().setZip(resultSet.getString("address_zip"));
    employee.setAge(resultSet.getInt("age"));
    return employee;
  }
}

class Employee {
  private Integer id;

  private Name name = new Name();

  private Integer age;

  private Sex sex;

  private Address address = new Address();

  private List<PhoneNumber> phoneNumbers = new ArrayList<PhoneNumber>();

  public Employee() {
  }

  public Employee(String firstName, String lastName) {
    this.getName().setFirst(firstName);
    this.getName().setLast(lastName);
  }

  void setId(Integer id) {
    this.id = id;
  }

  public Integer getId() {
    return id;
  }

  public Address getAddress() {
    return address;
  }

  public Integer getAge() {
    return age;
  }

  public void setAge(Integer age) {
    this.age = age;
  }

  public Name getName() {
    return name;
  }

  public List<PhoneNumber> getPhoneNumbers() {
    return Collections.unmodifiableList(phoneNumbers);
  }

  public void addPhoneNumber(PhoneNumber phoneNumber) {
    this.phoneNumbers.add(phoneNumber);
  }

  public void removePhoneNumber(PhoneNumber phoneNumber) {
    this.phoneNumbers.remove(phoneNumber);
  }

  public void removePhoneNumber(int index) {
    this.phoneNumbers.remove(index);
  }

  public Sex getSex() {
    return sex;
  }

  public void setSex(Sex sex) {
    this.sex = sex;
  }
}

abstract class Sex {

  public static final Sex MALE = new Male();

  public static final Sex FEMALE = new Female();

  public boolean equals(Object o) {
    if (o == null) {
      return false;
    }
    return getClass().equals(o.getClass());
  }
}

class PhoneNumber {

}

class Address {
  private String line1;

  private String line2;

  private String city;

  private String state;

  private String zip;

  public void setLine1(String line1) {
    this.line1 = line1;
  }

  public String getLine1() {
    return this.line1;
  }

  public void setLine2(String line2) {
    this.line2 = line2;
  }

  public String getLine2() {
    return this.line2;
  }

  public void setCity(String city) {
    this.city = city;
  }

  public String getCity() {
    return this.city;
  }

  public void setState(String state) {
    this.state = state;
  }

  public String getState() {
    return this.state;
  }

  public void setZip(String zip) {
    this.zip = zip;
  }

  public String getZip() {
    return this.zip;
  }
}

final class Male extends Sex {
  protected Male() {

  }
}

final class Female extends Sex {
  protected Female() {

  }
}

class Name {
  private String first;

  private String middle;

  private String last;

  public void setFirst(String first) {
    this.first = first;
  }

  public String getFirst() {
    return this.first;
  }

  public void setMiddle(String middle) {
    this.middle = middle;
  }

  public String getMiddle() {
    return this.middle;
  }

  public void setLast(String last) {
    this.last = last;
  }

  public String getLast() {
    return this.last;
  }
}


File: Main.java

import java.util.Date;
import java.util.GregorianCalendar;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

class Main {
  public static void main(String args[]) throws Exception {
    ApplicationContext ctx = new ClassPathXmlApplicationContext(
        "context.xml");
    EmployeeDaoImpl ws = (EmployeeDaoImpl) ctx.getBean("employeeDao");

  }
}


File: context.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
    "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
      destroy-method="close">
  <property name="driverClassName" value="org.hsqldb.jdbcDriver"/>
  <property name="url" value="jdbc:hsqldb:mem:."/>
  <property name="username" value="sa"/>
  <property name="password" value=""/>
</bean>

<bean id="employeeDao" class="EmployeeDaoImpl">
  <property name="dataSource" ref="dataSource"/>
</bean>

</beans>




           
       

Spring-ExtendsMappingSqlQuery.zip( 3,660 k)

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