iBATIS框架的认识

iBATIS是一个数据库数据与javaBean相映射的持久化框架。

ibatis与hibernate的区别：

         （1）iBATIS不会自动生成SQL语句，而hibernate会自动生成SQL语句。

        （2）iBATIS是以关系数据模型为驱动，而hibernate是以对象模型为驱动。

 实例：

1.创建SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sqlMapConfig
PUBLIC "-//ibatis.apache.org//DTD SQL Map Config 2.0//EN"
"http://ibatis.apache.org/dtd/sql-map-config-2.dtd">

<sqlMapConfig>
     <settings useStatementNamespaces="true"/>
     <transactionManager type="JDBC">
        <dataSource type="SIMPLE">
          <property name="JDBC.Driver" 
               value="com.mysql.jdbc.Driver"/>
          <property name="JDBC.ConnectionURL"
               value="jdbc:mysql://localhost:3306/testdb"/>
          <property name="JDBC.Username" value="root"/>
          <property name="JDBC.Password" value="root"/>
        </dataSource>
      </transactionManager>
     <sqlMap resource="Employee.xml"/> 
</sqlMapConfig>

 

2.创建数据表

CREATE TABLE EMPLOYEE (
   id INT NOT NULL auto_increment,
   first_name VARCHAR(20) default NULL,
   last_name  VARCHAR(20) default NULL,
   salary     INT  default NULL,
   PRIMARY KEY (id)
);

3.创建JavaBean

public class Employee {
  private int id;
  private String first_name; 
  private String last_name;   
  private int salary;  

  /* Define constructors for the Employee class. */
  public Employee() {}
  
  public Employee(String fname, String lname, int salary) {
    this.first_name = fname;
    this.last_name = lname;
    this.salary = salary;
  }

 /* Here are the required method definitions */
  public int getId() {
    return id;
  }
  public void setId(int id) {
    this.id = id;
  }
  public String getFirstName() {
    return first_name;
  }
  public void setFirstName(String fname) {
    this.first_name = fname;
  }
  public String getLastName() {
    return last_name;
  }
  public void setlastName(String lname) {
    this.last_name = lname;
  }
  public int getSalary() {
    return salary;
  }
  public void setSalary(int salary) {
    this.salary = salary;
  }

 } /* End of Employee */

4.创建employee.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sqlMap 
PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
"http://ibatis.apache.org/dtd/sql-map-2.dtd">

<sqlMap namespace="Employee">

<select id="getAll" resultClass="Employee">
   SELECT * FROM EMPLOYEE
</select>

<update id="update" parameterClass="Employee">
   UPDATE EMPLOYEE
   SET    first_name = #first_name#
   WHERE  id = #id#
</update>

</sqlMap>

5.编译及运行

import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;
import java.io.*;
import java.sql.SQLException;
import java.util.*;

public class IbatisUpdate{
  public static void main(String[] args)
   throws IOException,SQLException{
   Reader rd = Resources.getResourceAsReader("SqlMapConfig.xml");
   SqlMapClient smc = SqlMapClientBuilder.buildSqlMapClient(rd);

   /* This would update one record in Employee table. */
   System.out.println("Going to update record.....");
   Employee rec = new Employee();
   rec.setId(1);
   rec.setFirstName( "Roma");
   smc.update("Employee.update", rec );
   System.out.println("Record updated Successfully ");

   System.out.println("Going to read records.....");
   List <Employee> ems = (List<Employee>)
                  smc.queryForList("Employee.getAll", null);
   Employee em = null;
   for (Employee e : ems) {
      System.out.print("  " + e.getId());
      System.out.print("  " + e.getFirstName());
      System.out.print("  " + e.getLastName());
      System.out.print("  " + e.getSalary());
      em = e; 
      System.out.println("");
   }    

   System.out.println("Records Read Successfully ");

  }
} 

 

在此文章大致来自于http://www.tutorialspoint.com/ibatis/ibatis_quick_guide.htm。特此在此申明