iBATIS代码生成分析
1.分析目录结构“tools”(或者说模板)

2.首先分析ibatorConfig.xml文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE ibatorConfiguration PUBLIC "-//Apache Software Foundation//DTD Apache iBATIS Ibator Configuration 1.0//EN" "http://ibatis.apache.org/dtd/ibator-config_1_0.dtd" >
<ibatorConfiguration> <classPathEntry
location="F:\sqljdbc.jar" />
<ibatorContext id="context1" targetRuntime="Ibatis2Java5"> <!--
classPathEntry 指定数据库jdbc驱动jar包的绝对路径。
--> <!--
id 这个id可以在使用命令行运行Abator时指定,以单独处理某一个ibatorContext targetRuntime
Ibatis2Java5 生成适合JDK5.0的类,另一个选项是 Ibatis2Java2,生成适合Java2的类。
--> <ibatorPlugin
type="org.apache.ibatis.ibator.plugins.RenameExampleClassPlugin">
<property name="searchString" value="Example$" />
<property name="replaceString" value="Example" />
</ibatorPlugin> <!--
ibatorPlugin 继承自IbatorPluginAdapter,包名必须是
org.apache.ibatis.ibator.plugins,具体实现可以参考官方文档 必须有替换和被替换字符属性。
-->
<!--
<jdbcConnection driverClass="org.postgresql.Driver"
connectionURL="jdbc:postgresql://127.0.0.1:5432/hibernateTest" userId="postgres"
password="postgres" />
-->
<jdbcConnection driverClass="com.microsoft.sqlserver.jdbc.SQLServerDriver"
connectionURL="jdbc:sqlserver://127.0.0.1:1433;databaseName=PanaDatabase" userId="sa"
password="sasa" /> <!--
driverClass 数据库驱动类 connectionURL 数据库连接地址 userId 用户 password 密码 还可以使用以下格式添加数据库的其他连接属性 <property name="" value=""/>
--> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> <!--
默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer true,把JDBC DECIMAL 和
NUMERIC 类型解析为java.math.BigDecimal
--> </javaTypeResolver> <javaModelGenerator targetPackage="abator.model"
targetProject="comboFramework/tools" /> <!--
targetProject 生成的Java Bean放置在哪个项目的哪个目录下 targetPackage 生成的Java Bean的包名
一个有用的属性 <property name="trimStrings" value="true" /> 从数据库返回的值被清理前后的空格
<property name="enableSubPackages" value="false" /> 是否在包名后加上scheme名称
--> <sqlMapGenerator targetPackage="abator.sqlmap"
targetProject="comboFramework/tools" /> <!--
targetProject 生成的 SqlMap.xml 文件放置在哪个项目的哪个目录下 targetPackage 生成的
SqlMap.xml 文件的包名 <property name="enableSubPackages" value="false" />
是否在包名后加上scheme名称
--> <daoGenerator targetPackage="abator.dao" targetProject="comboFramework/tools"
type="GENERIC-CI" /> <table tableName="InfoVoteItm"></table> </ibatorContext>
</ibatorConfiguration>

需要注意的几点是
1.指向的jdbc包是否正确或存在
<classPathEntry
location="F:\sqljdbc.jar" />
<ibatorContext id="context1" targetRuntime="Ibatis2Java5">
2.数据库连接是否配置正确
<jdbcConnection driverClass="com.microsoft.sqlserver.jdbc.SQLServerDriver"
connectionURL="jdbc:sqlserver://127.0.0.1:1433;databaseName=PanaDatabase" userId="sa"
password="sasa" />
3.指向的模板工具是否正确

<!--
targetProject 生成的Java Bean放置在哪个项目的哪个目录下 targetPackage 生成的Java Bean的包名
一个有用的属性 <property name="trimStrings" value="true" /> 从数据库返回的值被清理前后的空格
<property name="enableSubPackages" value="false" /> 是否在包名后加上scheme名称
--> <sqlMapGenerator targetPackage="abator.sqlmap"
targetProject="comboFramework/tools" /> <!--
targetProject 生成的 SqlMap.xml 文件放置在哪个项目的哪个目录下 targetPackage 生成的
SqlMap.xml 文件的包名 <property name="enableSubPackages" value="false" />
是否在包名后加上scheme名称
--> <daoGenerator targetPackage="abator.dao" targetProject="comboFramework/tools"
type="GENERIC-CI" />

4.指向需要生成的表
<table tableName="InfoVoteItm"></table>
这里是单表(还没试过多个表一起生成呢,可以试试)
最终生成的结果如图

可以看出对iBATIS对表InfoVoteItm生成了三个模块即"sqlmap","model","dao"。
现在我们一个一个的来分析这三个部分。
在分析之前了解下InfoVoteItm表的结构

USE [PanaDatabase]
GO
/****** 对象: Table [dbo].[InfoVoteItm] 脚本日期: 06/04/2012 16:22:55 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[InfoVoteItm](
[EmpID] [nvarchar](250) COLLATE Chinese_PRC_CI_AS NULL,
[InfoDetail_ID] [int] NULL,
[VoteItmDate] [datetime] NULL CONSTRAINT [DF_InfoVoteItm_VoteItmDate] DEFAULT (getdate())
) ON [PRIMARY]

A.首先我们来分析"sqlmap"这一部分对InfoVoteItm表生成的文件InfoVoteItm_SqlMap.xml

<?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="InfoVoteItm" >
<resultMap id="ibatorgenerated_BaseResultMap" class="abator.model.Infovoteitm" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
<result column="EmpID" property="empid" jdbcType="VARCHAR" />
<result column="InfoDetail_ID" property="infodetailId" jdbcType="INTEGER" />
<result column="VoteItmDate" property="voteitmdate" jdbcType="TIMESTAMP" />
</resultMap>
<sql id="ibatorgenerated_Example_Where_Clause" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
<iterate property="oredCriteria" conjunction="or" prepend="where" removeFirstPrepend="iterate" >
<isEqual property="oredCriteria[].valid" compareValue="true" >
(
<iterate prepend="and" property="oredCriteria[].criteriaWithoutValue" conjunction="and" >
$oredCriteria[].criteriaWithoutValue[]$
</iterate>
<iterate prepend="and" property="oredCriteria[].criteriaWithSingleValue" conjunction="and" >
$oredCriteria[].criteriaWithSingleValue[].condition$
#oredCriteria[].criteriaWithSingleValue[].value#
</iterate>
<iterate prepend="and" property="oredCriteria[].criteriaWithListValue" conjunction="and" >
$oredCriteria[].criteriaWithListValue[].condition$
<iterate property="oredCriteria[].criteriaWithListValue[].values" open="(" close=")" conjunction="," >
#oredCriteria[].criteriaWithListValue[].values[]#
</iterate>
</iterate>
<iterate prepend="and" property="oredCriteria[].criteriaWithBetweenValue" conjunction="and" >
$oredCriteria[].criteriaWithBetweenValue[].condition$
#oredCriteria[].criteriaWithBetweenValue[].values[0]# and
#oredCriteria[].criteriaWithBetweenValue[].values[1]#
</iterate>
)
</isEqual>
</iterate>
</sql>
<select id="ibatorgenerated_selectByExample" resultMap="ibatorgenerated_BaseResultMap" parameterClass="abator.model.InfovoteitmExample" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
select EmpID, InfoDetail_ID, VoteItmDate
from InfoVoteItm
<isParameterPresent >
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
<isNotNull property="orderByClause" >
order by $orderByClause$
</isNotNull>
</isParameterPresent>
</select>
<delete id="ibatorgenerated_deleteByExample" parameterClass="abator.model.InfovoteitmExample" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
delete from InfoVoteItm
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
</delete>
<insert id="ibatorgenerated_insert" parameterClass="abator.model.Infovoteitm" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
insert into InfoVoteItm (EmpID, InfoDetail_ID, VoteItmDate)
values (#empid:VARCHAR#, #infodetailId:INTEGER#, #voteitmdate:TIMESTAMP#)
</insert>
<insert id="ibatorgenerated_insertSelective" parameterClass="abator.model.Infovoteitm" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
insert into InfoVoteItm
<dynamic prepend="(" >
<isNotNull prepend="," property="empid" >
EmpID
</isNotNull>
<isNotNull prepend="," property="infodetailId" >
InfoDetail_ID
</isNotNull>
<isNotNull prepend="," property="voteitmdate" >
VoteItmDate
</isNotNull>
)
</dynamic>
values
<dynamic prepend="(" >
<isNotNull prepend="," property="empid" >
#empid:VARCHAR#
</isNotNull>
<isNotNull prepend="," property="infodetailId" >
#infodetailId:INTEGER#
</isNotNull>
<isNotNull prepend="," property="voteitmdate" >
#voteitmdate:TIMESTAMP#
</isNotNull>
)
</dynamic>
</insert>
<select id="ibatorgenerated_countByExample" parameterClass="abator.model.InfovoteitmExample" resultClass="java.lang.Integer" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
select count(*) from InfoVoteItm
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
</select>
<update id="ibatorgenerated_updateByExampleSelective" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
update InfoVoteItm
<dynamic prepend="set" >
<isNotNull prepend="," property="record.empid" >
EmpID = #record.empid:VARCHAR#
</isNotNull>
<isNotNull prepend="," property="record.infodetailId" >
InfoDetail_ID = #record.infodetailId:INTEGER#
</isNotNull>
<isNotNull prepend="," property="record.voteitmdate" >
VoteItmDate = #record.voteitmdate:TIMESTAMP#
</isNotNull>
</dynamic>
<isParameterPresent >
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
</isParameterPresent>
</update>
<update id="ibatorgenerated_updateByExample" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
update InfoVoteItm
set EmpID = #record.empid:VARCHAR#,
InfoDetail_ID = #record.infodetailId:INTEGER#,
VoteItmDate = #record.voteitmdate:TIMESTAMP#
<isParameterPresent >
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
</isParameterPresent>
</update>
</sqlMap>

可以看出对表InfoVoteItm做了实体映射(实现增加add,删除delete,修改update,查询select)
首先分析下映射实体类

<resultMap id="ibatorgenerated_BaseResultMap" class="abator.model.Infovoteitm" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
<result column="EmpID" property="empid" jdbcType="VARCHAR" />
<result column="InfoDetail_ID" property="infodetailId" jdbcType="INTEGER" />
<result column="VoteItmDate" property="voteitmdate" jdbcType="TIMESTAMP" />
</resultMap>

其中"id"起标识的作用,"class"映射由iBATIS生成的实体类(路径指向,若要移动该文件此处要及得修改)
"column"可以随意定义但前提是实体类中有相匹配的字段即"property","jdbcType"设置字段属性(属性与数据库字段类型相同)
查询(可以看出resultMap是对实体类的一种映射,如果查询select中的字段在实体类中未定义则会出现异常,parameterClass指向的是参数需要注意与class的区别)

<select id="ibatorgenerated_selectByExample" resultMap="ibatorgenerated_BaseResultMap" parameterClass="abator.model.InfovoteitmExample" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
select EmpID, InfoDetail_ID, VoteItmDate
from InfoVoteItm
<isParameterPresent >
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
<isNotNull property="orderByClause" >
order by $orderByClause$
</isNotNull>
</isParameterPresent>
</select>

查询返回结果值

<select id="ibatorgenerated_countByExample" parameterClass="abator.model.InfovoteitmExample" resultClass="java.lang.Integer" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
select count(*) from InfoVoteItm
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
</select>

删除

<delete id="ibatorgenerated_deleteByExample" parameterClass="abator.model.InfovoteitmExample" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
delete from InfoVoteItm
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
</delete>

添加
1.添加所有项

<insert id="ibatorgenerated_insert" parameterClass="abator.model.Infovoteitm" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
insert into InfoVoteItm (EmpID, InfoDetail_ID, VoteItmDate)
values (#empid:VARCHAR#, #infodetailId:INTEGER#, #voteitmdate:TIMESTAMP#)
</insert>

2.选择性添加

<insert id="ibatorgenerated_insertSelective" parameterClass="abator.model.Infovoteitm" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
insert into InfoVoteItm
<dynamic prepend="(" >
<isNotNull prepend="," property="empid" >
EmpID
</isNotNull>
<isNotNull prepend="," property="infodetailId" >
InfoDetail_ID
</isNotNull>
<isNotNull prepend="," property="voteitmdate" >
VoteItmDate
</isNotNull>
)
</dynamic>
values
<dynamic prepend="(" >
<isNotNull prepend="," property="empid" >
#empid:VARCHAR#
</isNotNull>
<isNotNull prepend="," property="infodetailId" >
#infodetailId:INTEGER#
</isNotNull>
<isNotNull prepend="," property="voteitmdate" >
#voteitmdate:TIMESTAMP#
</isNotNull>
)
</dynamic>
</insert>

变更
1.选择性变更(条件可选)

<update id="ibatorgenerated_updateByExampleSelective" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
update InfoVoteItm
<dynamic prepend="set" >
<isNotNull prepend="," property="record.empid" >
EmpID = #record.empid:VARCHAR#
</isNotNull>
<isNotNull prepend="," property="record.infodetailId" >
InfoDetail_ID = #record.infodetailId:INTEGER#
</isNotNull>
<isNotNull prepend="," property="record.voteitmdate" >
VoteItmDate = #record.voteitmdate:TIMESTAMP#
</isNotNull>
</dynamic>
<isParameterPresent >
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
</isParameterPresent>
</update>

2.条件必须

<update id="ibatorgenerated_updateByExample" >
<!--
WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.
This element was generated on Wed Mar 09 16:57:25 CST 2011.
-->
update InfoVoteItm
set EmpID = #record.empid:VARCHAR#,
InfoDetail_ID = #record.infodetailId:INTEGER#,
VoteItmDate = #record.voteitmdate:TIMESTAMP#
<isParameterPresent >
<include refid="InfoVoteItm.ibatorgenerated_Example_Where_Clause" />
</isParameterPresent>
</update>

"model"是对实体类的封装就不说了,看下"dao"层。
"dao"层生成了两个文件InfovoteitmDAO是接口类对方法的声明(包括增,删,改,查)而InfovoteitmDAOImpl是类是对InfovoteitmDAO接口方法的
实现。
InfovoteitmDAO 接口

package abator.dao; import abator.model.Infovoteitm;
import abator.model.InfovoteitmExample;
import java.sql.SQLException;
import java.util.List; public interface InfovoteitmDAO {
/**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
int countByExample(InfovoteitmExample example) throws SQLException; /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
int deleteByExample(InfovoteitmExample example) throws SQLException; /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
void insert(Infovoteitm record) throws SQLException; /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
void insertSelective(Infovoteitm record) throws SQLException; /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
List<Infovoteitm> selectByExample(InfovoteitmExample example) throws SQLException; /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
int updateByExampleSelective(Infovoteitm record, InfovoteitmExample example) throws SQLException; /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
int updateByExample(Infovoteitm record, InfovoteitmExample example) throws SQLException;
}

InfovoteitmDAOImpl类

package abator.dao; import abator.model.Infovoteitm;
import abator.model.InfovoteitmExample;
import com.ibatis.sqlmap.client.SqlMapClient;
import java.sql.SQLException;
import java.util.List; public class InfovoteitmDAOImpl implements InfovoteitmDAO {
/**
* This field was generated by Apache iBATIS ibator.
* This field corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
private SqlMapClient sqlMapClient; /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
public InfovoteitmDAOImpl(SqlMapClient sqlMapClient) {
super();
this.sqlMapClient = sqlMapClient;
} /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
public int countByExample(InfovoteitmExample example) throws SQLException {
Integer count = (Integer) sqlMapClient.queryForObject("InfoVoteItm.ibatorgenerated_countByExample", example);
return count;
} /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
public int deleteByExample(InfovoteitmExample example) throws SQLException {
int rows = sqlMapClient.delete("InfoVoteItm.ibatorgenerated_deleteByExample", example);
return rows;
} /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
public void insert(Infovoteitm record) throws SQLException {
sqlMapClient.insert("InfoVoteItm.ibatorgenerated_insert", record);
} /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
public void insertSelective(Infovoteitm record) throws SQLException {
sqlMapClient.insert("InfoVoteItm.ibatorgenerated_insertSelective", record);
} /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
@SuppressWarnings("unchecked")
public List<Infovoteitm> selectByExample(InfovoteitmExample example) throws SQLException {
List<Infovoteitm> list = sqlMapClient.queryForList("InfoVoteItm.ibatorgenerated_selectByExample", example);
return list;
} /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
public int updateByExampleSelective(Infovoteitm record, InfovoteitmExample example) throws SQLException {
UpdateByExampleParms parms = new UpdateByExampleParms(record, example);
int rows = sqlMapClient.update("InfoVoteItm.ibatorgenerated_updateByExampleSelective", parms);
return rows;
} /**
* This method was generated by Apache iBATIS ibator.
* This method corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
public int updateByExample(Infovoteitm record, InfovoteitmExample example) throws SQLException {
UpdateByExampleParms parms = new UpdateByExampleParms(record, example);
int rows = sqlMapClient.update("InfoVoteItm.ibatorgenerated_updateByExample", parms);
return rows;
} /**
* This class was generated by Apache iBATIS ibator.
* This class corresponds to the database table InfoVoteItm
*
* @ibatorgenerated Wed Mar 09 16:57:25 CST 2011
*/
private static class UpdateByExampleParms extends InfovoteitmExample {
private Object record; public UpdateByExampleParms(Object record, InfovoteitmExample example) {
super(example);
this.record = record;
} public Object getRecord() {
return record;
}
}
}
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