iBatis简单入门教程

柔情只为你懂 2022-08-14 05:45 182阅读 0赞

**转自 [ http://www.cnblogs.com/ycxyyzw/archive/2012/10/13/2722567.html][http_www.cnblogs.com_ycxyyzw_archive_2012_10_13_2722567.html]**

**iBatis 简介：**

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 [ ![复制代码][icon_copy.gif]][_icon_copy.gif] [ ![收藏代码][icon_star.png]][_icon_star.png]

1.  package com.iflytek.entity;
2.  
3.  import java.sql.Date;
4.  
5.  /\*\* 
6.  \* @author xudongwang 2011-12-31 
7.  \* 
8.  \* Email:xdwangiflytek@gmail.com 
9.  \* 
10. \*/
11. publicclass Student \{
12. // 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 
13. privateint id;
14. private String name;
15. private Date birth;
16. privatefloat score;
17. 
18. publicint getId() \{
19. return id;
20. \}
21. 
22. publicvoid setId(int id) \{
23. this.id = id;
24. \}
25. 
26. public String getName() \{
27. return name;
28. \}
29. 
30. publicvoid setName(String name) \{
31. this.name = name;
32. \}
33. 
34. public Date getBirth() \{
35. return birth;
36. \}
37. 
38. publicvoid setBirth(Date birth) \{
39. this.birth = birth;
40. \}
41. 
42. publicfloat getScore() \{
43. return score;
44. \}
45. 
46. publicvoid setScore(float score) \{
47. this.score = score;
48. \}
49. 
50. @Override
51. public String toString() \{
52. return"id=" \+ id + "\\tname=" \+ name + "\\tmajor=" \+ birth + "\\tscore="
53. \+ score + "\\n";
54. \}
55. 
56. \}

SqlMap.properties ：

Properties代码 [ ![复制代码][icon_copy.gif]][_icon_copy.gif] [ ![收藏代码][icon_star.png]][_icon_star.png]

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

Student.xml ：

Xml代码 [ ![复制代码][icon_copy.gif]][_icon_copy.gif] [ ![收藏代码][icon_star.png]][_icon_star.png]

1.  **<?xml**version="1.0"encoding="UTF-8"**?>**
2.  <!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
3.  "http://ibatis.apache.org/dtd/sql-map-2.dtd"**>**
4.  
5.  **<sqlMap>**
6.  
7.  **<typeAlias**alias="Student"type="com.iflytek.entity.Student"**/>**
8.  
9.  
10. 
11. **<select**id="selectAllStudent"resultClass="Student"**>**
12. select \* from
13. tbl\_student
14. **</select>**
15. 
16. 
17. 
18. **<select**id="selectStudentById"parameterClass="int"resultClass="Student"**>**
19. select \* from tbl\_student where id=\#id\#
20. **</select>**
21. 
22. 
23. **<select**id="selectStudentByName"parameterClass="String"
24. resultClass="Student"**>**
25. select name,birth,score from tbl\_student where name like
26. '%$name$%'
27. **</select>**
28. 
29. **<insert**id="addStudent"parameterClass="Student"**>**
30. insert into
31. tbl\_student(name,birth,score) values
32. (\#name\#,\#birth\#,\#score\#)
33. **<selectKey**resultClass="int"keyProperty="id"**>**
34. select @@identity as inserted
35. 
36. 
37. 
38. 
39. 
46. 
47. delete from tbl\_student where id=\#id\#
48. **</delete>**
49. 
50. **<update**id="updateStudent"parameterClass="Student"**>**
51. update tbl\_student set
52. name=\#name\#,birth=\#birth\#,score=\#score\# where id=\#id\#
53. **</update>**
54. 
55. **</sqlMap>**

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 [ ![复制代码][icon_copy.gif]][_icon_copy.gif] [ ![收藏代码][icon_star.png]][_icon_star.png]

1.  **<?xml**version="1.0"encoding="UTF-8"**?>**
2.  <!DOCTYPE sqlMapConfig PUBLIC "-//ibatis.apache.org//DTD SQL Map Config 2.0//EN"
3.  "http://ibatis.apache.org/dtd/sql-map-config-2.dtd"**>**
4.  
5.  **<sqlMapConfig>**
6.  
7.  **<properties**resource="com/iflytek/entity/SqlMap.properties"**/>**
8.  
9.  **<transactionManager**type="JDBC"**>**
10. 
11. **<dataSource**type="SIMPLE"**>**
12. **<property**name="JDBC.Driver"value="$\{driver\}"**/>**
13. **<property**name="JDBC.ConnectionURL"value="$\{url\}"**/>**
14. **<property**name="JDBC.Username"value="$\{username\}"**/>**
15. **<property**name="JDBC.Password"value="$\{password\}"**/>**
16. **</dataSource>**
17. **</transactionManager>**
18. 
19. **<sqlMap**resource="com/iflytek/entity/Student.xml"**/>**
20. **</sqlMapConfig>**

StudentDao ：

Java代码 [ ![复制代码][icon_copy.gif]][_icon_copy.gif] [ ![收藏代码][icon_star.png]][_icon_star.png]

1.  package com.iflytek.dao;
2.  
3.  import java.util.List;
4.  
5.  import com.iflytek.entity.Student;
6.  
7.  /\*\* 
8.  \* @author xudongwang 2011-12-31 
9.  \* 
10. \* Email:xdwangiflytek@gmail.com 
11. \* 
12. \*/
13. publicinterface StudentDao \{
14. 
15. /\*\* 
16. \* 添加学生信息 
17. \* 
18. \* @param student 
19. \* 学生实体 
20. \* @return 返回是否添加成功 
21. \*/
22. publicboolean addStudent(Student student);
23. 
24. /\*\* 
25. \* 根据学生id删除学生信息 
26. \* 
27. \* @param id 
28. \* 学生id 
29. \* @return 删除是否成功 
30. \*/
31. publicboolean deleteStudentById(int id);
32. 
33. /\*\* 
34. \* 更新学生信息 
35. \* 
36. \* @param student 
37. \* 学生实体 
38. \* @return 更新是否成功 
39. \*/
40. publicboolean updateStudent(Student student);
41. 
42. /\*\* 
43. \* 查询全部学生信息 
44. \* 
45. \* @return 返回学生列表 
46. \*/
47. public List<Student> selectAllStudent();
48. 
49. /\*\* 
50. \* 根据学生姓名模糊查询学生信息 
51. \* 
52. \* @param name 
53. \* 学生姓名 
54. \* @return 学生信息列表 
55. \*/
56. public List<Student> selectStudentByName(String name);
57. 
58. /\*\* 
59. \* 根据学生id查询学生信息 
60. \* 
61. \* @param id 
62. \* 学生id 
63. \* @return 学生对象 
64. \*/
65. public Student selectStudentById(int id);
66. 
67. \}

StudentDaoImpl ：

Java代码 [ ![复制代码][icon_copy.gif]][_icon_copy.gif] [ ![收藏代码][icon_star.png]][_icon_star.png]

1.  package com.iflytek.daoimpl;
2.  
3.  import java.io.IOException;
4.  import java.io.Reader;
5.  import java.sql.SQLException;
6.  import java.util.List;
7.  
8.  import com.ibatis.common.resources.Resources;
9.  import com.ibatis.sqlmap.client.SqlMapClient;
10. import com.ibatis.sqlmap.client.SqlMapClientBuilder;
11. import com.iflytek.dao.StudentDao;
12. import com.iflytek.entity.Student;
13. 
14. /\*\* 
15. \* @author xudongwang 2011-12-31 
16. \* 
17. \* Email:xdwangiflytek@gmail.com 
18. \* 
19. \*/
20. publicclass StudentDaoImpl implements StudentDao \{
21. 
22. privatestatic SqlMapClient sqlMapClient = null;
23. 
24. // 读取配置文件 
25. static \{
26. try \{
27. Reader reader = Resources
28. .getResourceAsReader("com/iflytek/entity/SqlMapConfig.xml");
29. sqlMapClient = SqlMapClientBuilder.buildSqlMapClient(reader);
30. reader.close();
31. \} catch (IOException e) \{
32. e.printStackTrace();
33. \}
34. \}
35. 
36. publicboolean addStudent(Student student) \{
37. Object object = null;
38. boolean flag = false;
39. try \{
40. object = sqlMapClient.insert("addStudent", student);
41. System.out.println("添加学生信息的返回值：" \+ object);
42. \} catch (SQLException e) \{
43. e.printStackTrace();
44. \}
45. if (object != null) \{
46. flag = true;
47. \}
48. return flag;
49. \}
50. 
51. publicboolean deleteStudentById(int id) \{
52. boolean flag = false;
53. Object object = null;
54. try \{
55. object = sqlMapClient.delete("deleteStudentById", id);
56. 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");
57. \} catch (SQLException e) \{
58. e.printStackTrace();
59. \}
60. if (object != null) \{
61. flag = true;
62. 
63. \}
64. return flag;
65. 
66. \}
67. 
68. publicboolean updateStudent(Student student) \{
69. boolean flag = false;
70. Object object = false;
71. try \{
72. object = sqlMapClient.update("updateStudent", student);
73. System.out.println("更新学生信息的返回值：" \+ object + "，返回影响的行数");
74. \} catch (SQLException e) \{
75. e.printStackTrace();
76. \}
77. if (object != null) \{
78. flag = true;
79. \}
80. return flag;
81. \}
82. 
83. public List<Student> selectAllStudent() \{
84. List<Student> students = null;
85. try \{
86. students = sqlMapClient.queryForList("selectAllStudent");
87. \} catch (SQLException e) \{
88. e.printStackTrace();
89. \}
90. return students;
91. \}
92. 
93. public List<Student> selectStudentByName(String name) \{
94. List<Student> students = null;
95. try \{
96. students = sqlMapClient.queryForList("selectStudentByName",name);
97. \} catch (SQLException e) \{
98. e.printStackTrace();
99. \}
100. return students;
101. \}
102. 
103. public Student selectStudentById(int id) \{
104. Student student = null;
105. try \{
106. student = (Student) sqlMapClient.queryForObject(
107. "selectStudentById", id);
108. \} catch (SQLException e) \{
109. e.printStackTrace();
110. \}
111. return student;
112. \}
113. \}

TestIbatis.java ：

Java代码 [ ![复制代码][icon_copy.gif]][_icon_copy.gif] [ ![收藏代码][icon_star.png]][_icon_star.png]

1.  package com.iflytek.test;
2.  
3.  import java.sql.Date;
4.  import java.util.List;
5.  
6.  import com.iflytek.daoimpl.StudentDaoImpl;
7.  import com.iflytek.entity.Student;
8.  
9.  /\*\* 
10. \* @author xudongwang 2011-12-31 
11. \* 
12. \* Email:xdwangiflytek@gmail.com 
13. \* 
14. \*/
15. publicclass TestIbatis \{
16. 
17. publicstaticvoid main(String\[\] args) \{
18. StudentDaoImpl studentDaoImpl = new StudentDaoImpl();
19. 
20. System.out.println("测试插入");
21. Student addStudent = new Student();
22. addStudent.setName("李四");
23. addStudent.setBirth(Date.valueOf("2011-09-02"));
24. addStudent.setScore(88);
25. System.out.println(studentDaoImpl.addStudent(addStudent));
26. 
27. System.out.println("测试根据id查询");
28. System.out.println(studentDaoImpl.selectStudentById(1));
29. 
30. System.out.println("测试模糊查询");
31. List<Student> mohuLists = studentDaoImpl.selectStudentByName("李");
32. for (Student student : mohuLists) \{
33. System.out.println(student);
34. \}
35. 
36. System.out.println("测试查询所有");
37. List<Student> students = studentDaoImpl.selectAllStudent();
38. for (Student student : students) \{
39. System.out.println(student);
40. \}
41. 
42. System.out.println("根据id删除学生信息");
43. System.out.println(studentDaoImpl.deleteStudentById(1));
44. 
45. System.out.println("测试更新学生信息");
46. Student updateStudent = new Student();
47. updateStudent.setId(1);
48. updateStudent.setName("李四1");
49. updateStudent.setBirth(Date.valueOf("2011-08-07"));
50. updateStudent.setScore(21);
51. System.out.println(studentDaoImpl.updateStudent(updateStudent));
52. 
53. \}
54. \}

**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；

[http_www.cnblogs.com_ycxyyzw_archive_2012_10_13_2722567.html]: http://www.cnblogs.com/ycxyyzw/archive/2012/10/13/2722567.html
[icon_copy.gif]: http://xdwangiflytek.iteye.com/images/icon_copy.gif
[_icon_copy.gif]: http://xdwangiflytek.iteye.com/blog/1332520
[icon_star.png]: http://xdwangiflytek.iteye.com/images/icon_star.png
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