iBatis 是apache 的一个开源项目,一个O/R Mapping 解决方案,iBatis 最大的特点就是小巧,上手很快。如果不需要太多复杂的功能,iBatis 是能够满足你的要求又足够灵活的最简单的解决方案,现在的iBatis 已经改名为Mybatis 了。官网为:http://www.mybatis.org/

搭建iBatis 开发环境:

1 、导入相关的jar 包,ibatis-2.3.0.677.jar 、mysql-connector-java-5.1.6-bin.jar

2 、编写配置文件:

Jdbc 连接的属性文件

总配置文件, SqlMapConfig.xml

关于每个实体的映射文件(Map 文件)

Demo

Student.java:

Java代码
  1. package com.iflytek.entity;
  2. import java.sql.Date;
  3. /**
  4. * @author xudongwang 2011-12-31
  5. *
  6. * Email:xdwangiflytek@gmail.com
  7. *
  8. */
  9. public class Student {
  10. // 注意这里需要保证有一个无参构造方法,因为包括Hibernate在内的映射都是使用反射的,如果没有无参构造可能会出现问题
  11. private int id;
  12. private String name;
  13. private Date birth;
  14. private float score;
  15. public int getId() {
  16. return id;
  17. }
  18. public void setId(int id) {
  19. this.id = id;
  20. }
  21. public String getName() {
  22. return name;
  23. }
  24. public void setName(String name) {
  25. this.name = name;
  26. }
  27. public Date getBirth() {
  28. return birth;
  29. }
  30. public void setBirth(Date birth) {
  31. this.birth = birth;
  32. }
  33. public float getScore() {
  34. return score;
  35. }
  36. public void setScore(float score) {
  37. this.score = score;
  38. }
  39. @Override
  40. public String toString() {
  41. return "id=" + id + "\tname=" + name + "\tmajor=" + birth + "\tscore="
  42. + score + "\n";
  43. }
  44. }

 

SqlMap.properties :

Properties代码
  1. driver=com.mysql.jdbc.Driver
  2. url=jdbc:mysql://localhost:3306/ibatis
  3. username=root
  4. password=123

 

Student.xml :

Xml代码
  1. version="1.0" encoding="UTF-8" ?>
  2. "http://ibatis.apache.org/dtd/sql-map-2.dtd">
  3. alias="Student" type="com.iflytek.entity.Student" />
  4. id="selectAllStudent" resultClass="Student">
  5. select * from
  6. tbl_student
  7. id="selectStudentById" parameterClass="int" resultClass="Student">
  8. select * from tbl_student where id=#id#
  9. id="selectStudentByName" parameterClass="String"
  10. resultClass="Student">
  11. select name,birth,score from tbl_student where name like
  12. '%$name$%'
  13. id="addStudent" parameterClass="Student">
  14. insert into
  15. tbl_student(name,birth,score) values
  16. (#name#,#birth#,#score#);
  17. resultClass="int" keyProperty="id">
  18. select @@identity as inserted
  19. delete from tbl_student where id=#id#
  20. id="updateStudent" parameterClass="Student">
  21. update tbl_student set
  22. name=#name#,birth=#birth#,score=#score# where id=#id#

 

说明:

如果xml 中没有ibatis 的提示,则window --> Preference--> XML-->XML Catalog---> 点击add

选择uri URI: 请选择本地文件系统上

iBatisDemo1/WebContent/WEB-INF/lib/sql-map-config-2.dtd 文件;

Key Type: 选择Schema Location;

Key: 需要联网的,不建议使用;

SqlMapConfig.xml :

Xml代码
  1. version="1.0" encoding="UTF-8"?>
  2. "http://ibatis.apache.org/dtd/sql-map-config-2.dtd">
  3. resource="com/iflytek/entity/SqlMap.properties" />
  4. type="JDBC">
  5. type="SIMPLE">
  6. name="JDBC.Driver" value="${driver}" />
  7. name="JDBC.ConnectionURL" value="${url}" />
  8. name="JDBC.Username" value="${username}" />
  9. name="JDBC.Password" value="${password}" />
  10. resource="com/iflytek/entity/Student.xml" />

 

StudentDao :

Java代码
  1. package com.iflytek.dao;
  2. import java.util.List;
  3. import com.iflytek.entity.Student;
  4. /**
  5. * @author xudongwang 2011-12-31
  6. *
  7. * Email:xdwangiflytek@gmail.com
  8. *
  9. */
  10. public interface StudentDao {
  11. /**
  12. * 添加学生信息
  13. *
  14. * @param student
  15. * 学生实体
  16. * @return 返回是否添加成功
  17. */
  18. public boolean addStudent(Student student);
  19. /**
  20. * 根据学生id删除学生信息
  21. *
  22. * @param id
  23. * 学生id
  24. * @return 删除是否成功
  25. */
  26. public boolean deleteStudentById(int id);
  27. /**
  28. * 更新学生信息
  29. *
  30. * @param student
  31. * 学生实体
  32. * @return 更新是否成功
  33. */
  34. public boolean updateStudent(Student student);
  35. /**
  36. * 查询全部学生信息
  37. *
  38. * @return 返回学生列表
  39. */
  40. public List selectAllStudent();
  41. /**
  42. * 根据学生姓名模糊查询学生信息
  43. *
  44. * @param name
  45. * 学生姓名
  46. * @return 学生信息列表
  47. */
  48. public List selectStudentByName(String name);
  49. /**
  50. * 根据学生id查询学生信息
  51. *
  52. * @param id
  53. * 学生id
  54. * @return 学生对象
  55. */
  56. public Student selectStudentById(int id);
  57. }

StudentDaoImpl :

Java代码
  1. package com.iflytek.daoimpl;
  2. import java.io.IOException;
  3. import java.io.Reader;
  4. import java.sql.SQLException;
  5. import java.util.List;
  6. import com.ibatis.common.resources.Resources;
  7. import com.ibatis.sqlmap.client.SqlMapClient;
  8. import com.ibatis.sqlmap.client.SqlMapClientBuilder;
  9. import com.iflytek.dao.StudentDao;
  10. import com.iflytek.entity.Student;
  11. /**
  12. * @author xudongwang 2011-12-31
  13. *
  14. * Email:xdwangiflytek@gmail.com
  15. *
  16. */
  17. public class StudentDaoImpl implements StudentDao {
  18. private static SqlMapClient sqlMapClient = null;
  19. // 读取配置文件
  20. static {
  21. try {
  22. Reader reader = Resources
  23. .getResourceAsReader("com/iflytek/entity/SqlMapConfig.xml");
  24. sqlMapClient = SqlMapClientBuilder.buildSqlMapClient(reader);
  25. reader.close();
  26. } catch (IOException e) {
  27. e.printStackTrace();
  28. }
  29. }
  30. public boolean addStudent(Student student) {
  31. Object object = null;
  32. boolean flag = false;
  33. try {
  34. object = sqlMapClient.insert("addStudent", student);
  35. System.out.println("添加学生信息的返回值:" + object);
  36. } catch (SQLException e) {
  37. e.printStackTrace();
  38. }
  39. if (object != null) {
  40. flag = true;
  41. }
  42. return flag;
  43. }
  44. public boolean deleteStudentById(int id) {
  45. boolean flag = false;
  46. Object object = null;
  47. try {
  48. object = sqlMapClient.delete("deleteStudentById", id);
  49. System.out.println("删除学生信息的返回值:" + object + ",这里返回的是影响的行数");
  50. } catch (SQLException e) {
  51. e.printStackTrace();
  52. }
  53. if (object != null) {
  54. flag = true;
  55. }
  56. return flag;
  57. }
  58. public boolean updateStudent(Student student) {
  59. boolean flag = false;
  60. Object object = false;
  61. try {
  62. object = sqlMapClient.update("updateStudent", student);
  63. System.out.println("更新学生信息的返回值:" + object + ",返回影响的行数");
  64. } catch (SQLException e) {
  65. e.printStackTrace();
  66. }
  67. if (object != null) {
  68. flag = true;
  69. }
  70. return flag;
  71. }
  72. public List selectAllStudent() {
  73. List students = null;
  74. try {
  75. students = sqlMapClient.queryForList("selectAllStudent");
  76. } catch (SQLException e) {
  77. e.printStackTrace();
  78. }
  79. return students;
  80. }
  81. public List selectStudentByName(String name) {
  82. List students = null;
  83. try {
  84. students = sqlMapClient.queryForList("selectStudentByName",name);
  85. } catch (SQLException e) {
  86. e.printStackTrace();
  87. }
  88. return students;
  89. }
  90. public Student selectStudentById(int id) {
  91. Student student = null;
  92. try {
  93. student = (Student) sqlMapClient.queryForObject(
  94. "selectStudentById", id);
  95. } catch (SQLException e) {
  96. e.printStackTrace();
  97. }
  98. return student;
  99. }
  100. }

 

TestIbatis.java :

Java代码
  1. package com.iflytek.test;
  2. import java.sql.Date;
  3. import java.util.List;
  4. import com.iflytek.daoimpl.StudentDaoImpl;
  5. import com.iflytek.entity.Student;
  6. /**
  7. * @author xudongwang 2011-12-31
  8. *
  9. * Email:xdwangiflytek@gmail.com
  10. *
  11. */
  12. public class TestIbatis {
  13. public static void main(String[] args) {
  14. StudentDaoImpl studentDaoImpl = new StudentDaoImpl();
  15. System.out.println("测试插入");
  16. Student addStudent = new Student();
  17. addStudent.setName("李四");
  18. addStudent.setBirth(Date.valueOf("2011-09-02"));
  19. addStudent.setScore(88);
  20. System.out.println(studentDaoImpl.addStudent(addStudent));
  21. System.out.println("测试根据id查询");
  22. System.out.println(studentDaoImpl.selectStudentById(1));
  23. System.out.println("测试模糊查询");
  24. List mohuLists = studentDaoImpl.selectStudentByName("李");
  25. for (Student student : mohuLists) {
  26. System.out.println(student);
  27. }
  28. System.out.println("测试查询所有");
  29. List students = studentDaoImpl.selectAllStudent();
  30. for (Student student : students) {
  31. System.out.println(student);
  32. }
  33. System.out.println("根据id删除学生信息");
  34. System.out.println(studentDaoImpl.deleteStudentById(1));
  35. System.out.println("测试更新学生信息");
  36. Student updateStudent = new Student();
  37. updateStudent.setId(1);
  38. updateStudent.setName("李四1");
  39. updateStudent.setBirth(Date.valueOf("2011-08-07"));
  40. updateStudent.setScore(21);
  41. System.out.println(studentDaoImpl.updateStudent(updateStudent));
  42. }
  43. }

 

iBatis 的优缺点:

优点:

1、 减少代码量,简单;

2、 性能增强;

3、 Sql 语句与程序代码分离;

4、 增强了移植性;

缺点:

1、 和Hibernate 相比,sql 需要自己写;

2、 参数数量只能有一个,多个参数时不太方便;