基於前一個博客搭建的SSM框架
https://www.cnblogs.com/jiangyuqin/p/9870641.html
源碼：https://github.com/JHeaven/ssm-easy-demo
實現基於oracle數據庫集成tkmybatis 和 gengerator自動生成代碼
先看下完成之后的目錄結構
首先pom.xml里面引入相應的包和插件
1 <!-- https://mvnrepository.com/artifact/tk.mybatis/mapper -->
2 <dependency>
3 <groupId>tk.mybatis</groupId>
4 <artifactId>mapper</atifactId>
5 <version>${tkmybatis.version}</version>
6 </dependency>
引入插件包的時候，注意標簽的位置，觀察和pluginManagement標簽的相對位置。搞錯了可是出不來的，我盡量給出較多的代碼給大家參考。
1 <build>
2 <finalName>ssm-sc</finalName>
3 <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
4 <plugins>
5 <plugin>
6 <artifactId>maven-clean-plugin</artifactId>
7 <version>3.0.0</version>
8 </plugin>
9 <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
10 <plugin>
11 <artifactId>maven-resources-plugin</artifactId>
12 <version>3.0.2</version>
13 </plugin>
14 <plugin>
15 <artifactId>maven-compiler-plugin</artifactId>
16 <version>3.7.0</version>
17 </plugin>
18 <plugin>
19 <artifactId>maven-surefire-plugin</artifactId>
20 <version>2.20.1</version>
21 </plugin>
22 <plugin>
23 <artifactId>maven-war-plugin</artifactId>
24 <version>3.2.0</version>
25 </plugin>
26 <plugin>
27 <artifactId>maven-install-plugin</artifactId>
28 <version>2.5.2</version>
29 </plugin>
30 <plugin>
31 <artifactId>maven-deploy-plugin</artifactId>
32 <version>2.8.2</version>
33 </plugin>
34
35 </plugins>
36 </pluginManagement>
37 <plugins>
38 <!-- 自動生成代碼插件 -->
39 <plugin>
40 <groupId>org.mybatis.generator</groupId>
41 <artifactId>mybatis-generator-maven-plugin</artifactId>
42 <version>${mybatis.generator.version}</version>
43 <configuration>
44 <configurationFile>src/main/resources/generator/generatorConfig.xml</configurationFile>
45 <verbose>true</verbose>
46 <overwrite>true</overwrite>
47 </configuration>
48
49 <dependencies>
50 <dependency>
51 <groupId>org.mybatis.generator</groupId>
52 <artifactId>mybatis-generator-core</artifactId>
53 <version>${mybatis.generator.version}</version>
54 </dependency>
55 <dependency>
56 <groupId>com.oracle</groupId>
57 <artifactId>ojdbc6</artifactId>
58 <version>${oracle.version}</version>
59 </dependency>
60 <dependency>
61 <groupId>tk.mybatis</groupId>
62 <artifactId>mapper</artifactId>
63 <version>${tkmybatis.version}</version>
64 </dependency>
65 </dependencies>
66 </plugin>
67 </plugins>
68 </build>
還得在pom.xml里面設置一些變量，主要是給自動生成代碼的配置文件generatorConfig.xml用的，具體是啥看generatorConfig.xml里面的注釋。
1 <!-- MyBatis Generator -->
2 <mybatis.generator.version>1.3.7</mybatis.generator.version>
3 <tkmybatis.version>4.0.4</tkmybatis.version>
4
5 <mapper.plugin>tk.mybatis.mapper.generator.MapperPlugin</mapper.plugin>
6 <mapper.Mapper>com.jiangyuqin.utils.MyMapper</mapper.Mapper>
7
8 <ModelTargetPackage>com.jiangyuqin.model</ModelTargetPackage>
9 <ModelTargetProject>src/main/java</ModelTargetProject>
10
11 <sqlMapperTargetPackage>mapper</sqlMapperTargetPackage>
12 <sqlMapperTargetProject>src/main/resources</sqlMapperTargetProject>
13
14 <clientTargetPackage>com.jiangyuqin.mapper</clientTargetPackage>
15 <clientTargetProject>src/main/java</clientTargetProject>
新建自己的mapper類，用來被自動生成的mapper繼承，注意這個類需要被放到不可掃描到的位置。
1 package com.jiangyuqin.utils; 2
3 import tk.mybatis.mapper.common.Mapper; 4 import tk.mybatis.mapper.common.MySqlMapper; 5
6 /**
7 * 基礎 mapper 8 * 不可被掃描到 9 * BaseMapper<T> 10 * MySqlMapper<T> 11 * IdsMapper<T> 12 * ConditionMapper<T> 13 * ExampleMapper<T> 14 * @param <T> 15 */
16 public interface MyMapper<T> extends Mapper<T>,MySqlMapper<T> { 17
18 }
新建配置文件
1 <?xml version="1.0" encoding="UTF-8" ?>
2 <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" 3 "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
4 <generatorConfiguration>
5
6 <properties resource="generator/db.properties"/>
7
8 <context id="Oracle" targetRuntime="MyBatis3Simple" defaultModelType="flat">
9 <!-- TKmybatis配置 -->
10 <property name="javaFileEncoding" value="UTF-8"/>
11 <property name="beginningDelimiter" value="`"/>
12 <property name="endingDelimiter" value="`"/>
13 <plugin type="${mapper.plugin}">
14 <property name="mappers" value="${mapper.Mapper}"/>
15 </plugin>
16
17 <commentGenerator>
18 <!-- 是否去除自動生成的注釋 true：是 ： false:否 -->
19 <property name="suppressAllComments" value="true"/>
20 </commentGenerator>
21 <!-- 數據庫鏈接URL、用戶名、密碼 -->
22 <jdbcConnection driverClass="${db.driver}"
23 connectionURL="${db.url}"
24 userId="${db.user}"
25 password="${db.password}" />
26
27 <javaTypeResolver>
28 <property name="forceBigDecimals" value="false" />
29 </javaTypeResolver>
30 <!-- 生成模型的包名和位置 -->
31 <javaModelGenerator targetPackage="${ModelTargetPackage}" targetProject="${ModelTargetProject}" />
32 <!-- 生成的映射文件包名和位置 -->
33 <sqlMapGenerator targetPackage="${sqlMapperTargetPackage}" targetProject="${sqlMapperTargetProject}" />
34 <!-- 生成DAO的包名和位置 -->
35 <javaClientGenerator targetPackage="${clientTargetPackage}" targetProject="${clientTargetProject}" type="XMLMAPPER" />
36 <!-- 要生成的那些表 -->
37
38 <table tableName="Z_DBA_DATASOURCE" domainObjectName="DbaDatasource" >
39 <generatedKey column="UUID" sqlStatement="SELECT 1 FROM DUAL" identity="true"/>
40 </table>
41 <table tableName="Z_SYS_LOG" domainObjectName="SysLog" >
42 <generatedKey column="UUID" sqlStatement="SELECT 1 FROM DUAL" identity="true"/>
43 </table>
44 <table tableName="Z_USR_LOGINLOG" domainObjectName="UsrLoginLog" >
45 <generatedKey column="UUID" sqlStatement="SELECT 1 FROM DUAL" identity="true"/>
46 </table>
47 <table tableName="Z_USR_ADMIN" domainObjectName="UsrAdmin" >
48 <generatedKey column="UUID" sqlStatement="SELECT 1 FROM DUAL" identity="true"/>
49 </table>
50 </context>
51 </generatorConfiguration>
其中table標簽中sqlStatement這個參數，作廢，因為oracle沒有自增功能，與其去適應復雜的框架來實現妥協的不夠保險的自增，還不如在java里面用UUID傳參插入。
（或者以后自己寫一個生成UUID的方法，暫時直接調用JAVA提供的。）
db.properties就不給出了，無非就是一些數據連接。
到這基本就可以開始生成代碼了。
生成就結束了。
讓我們測試一下。
1.全量查詢
2.插入
報錯了，查看日志。
插入成功，回查UUID的時候出錯了，說明我們在generatorConfig.xml中配的 sqlStatement="select 1 from dual" 沒起作用
那就先手動修改吧
在實體類中，GeneratedValue注釋中，添加參數 generator = "SELECT SYS_GUID() FROM DUAL"，這個回傳的值沒有太大的意義，可以寫為 select 1 from dual
嘗試插入
成功。