ntellij IDEA 14 做爲Java IDE 神器,接觸後發現,很是好用,對它愛不釋手,打算離開eclipse和myeclipse,投入Intellij IDEA的懷抱。html
然而在使用的過程當中會發現Intellij IDEA也有一些不盡如意的地方,不免會有些不爽:Intellij IDEA 的插件庫遠不及eclipse的豐富。 mybatis-generator在eclipse中有專門的插件,而沒有開發出Intellij IDEA可以使用的插件。java
不過不用灰心,若是你的項目是使用maven組織的,那麼咱們能夠在Intellij IDEA中使用 mybatis-generator-maven-plugin插件來完成MyBatis model 和Mapper文件的自動生成。sql
[html] view plaincopy數據庫
<build> apache
<finalName>xxx</finalName> mybatis
<plugins> oracle
<plugin> app
<groupId>org.mybatis.generator</groupId> less
<artifactId>mybatis-generator-maven-plugin</artifactId> dom
<version>1.3.2</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build>
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!--導入屬性配置 -->
<properties resource="generator.properties"></properties>
<!--指定特定數據庫的jdbc驅動jar包的位置 -->
<classPathEntry location="${jdbc.driverLocation}"/>
<context id="default" targetRuntime="MyBatis3">
<!-- optional,旨在建立class時,對註釋進行控制 -->
<commentGenerator>
<property name="suppressDate" value="true" />
</commentGenerator>
<!--jdbc的數據庫鏈接 -->
<jdbcConnection driverClass="${jdbc.driverClass}" connectionURL="${jdbc.connectionURL}" userId="${jdbc.userId}" password="${jdbc.password}">
</jdbcConnection>
<!-- 非必需,類型處理器,在數據庫類型和java類型之間的轉換控制-->
<javaTypeResolver >
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- Model模型生成器,用來生成含有主鍵key的類,記錄類 以及查詢Example類
targetPackage 指定生成的model生成所在的包名
targetProject 指定在該項目下所在的路徑
-->
<javaModelGenerator targetPackage="org.louis.hometutor.po" targetProject="src/main/java">
<!-- 是否對model添加 構造函數 -->
<property name="constructorBased" value="true"/>
<!-- 是否容許子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
<!-- 創建的Model對象是否 不可改變 即生成的Model對象不會有 setter方法,只有構造方法 -->
<property name="immutable" value="true"/>
<!-- 給Model添加一個父類 -->
<property name="rootClass" value="com.foo.louis.Hello"/>
<!-- 是否對類CHAR類型的列的數據進行trim操做 -->
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!--Mapper映射文件生成所在的目錄 爲每個數據庫的表生成對應的SqlMap文件 -->
<sqlMapGenerator targetPackage="org.louis.hometutor.domain" targetProject="src/main/java">
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- 客戶端代碼,生成易於使用的針對Model對象和XML配置文件 的代碼
type="ANNOTATEDMAPPER",生成Java Model 和基於註解的Mapper對象
type="MIXEDMAPPER",生成基於註解的Java Model 和相應的Mapper對象
type="XMLMAPPER",生成SQLMap XML文件和獨立的Mapper接口
-->
<javaClientGenerator targetPackage="com.foo.tourist.dao" targetProject="src/main/java" type="MIXEDMAPPER">
<property name="enableSubPackages" value=""/>
<!--
定義Maper.java 源代碼中的ByExample() 方法的可視性,可選的值有:
public;
private;
protected;
default
注意:若是 targetRuntime="MyBatis3",此參數被忽略
-->
<property name="exampleMethodVisibility" value=""/>
<!--
方法名計數器
Important note: this property is ignored if the target runtime is MyBatis3.
-->
<property name="methodNameCalculator" value=""/>
<!--
爲生成的接口添加父接口
-->
<property name="rootInterface" value=""/>
</javaClientGenerator>
<table tableName="lession" schema="louis">
<!-- optional , only for mybatis3 runtime
自動生成的鍵值(identity,或者序列值)
若是指定此元素,MBG將會生成<selectKey>元素,而後將此元素插入到SQL Map的<insert> 元素之中
sqlStatement 的語句將會返回新的值
若是是一個自增主鍵的話,你可使用預約義的語句,或者添加自定義的SQL語句. 預約義的值以下:
Cloudscape This will translate to: VALUES IDENTITY_VAL_LOCAL()
DB2: VALUES IDENTITY_VAL_LOCAL()
DB2_MF: SELECT IDENTITY_VAL_LOCAL() FROM SYSIBM.SYSDUMMY1
Derby: VALUES IDENTITY_VAL_LOCAL()
HSQLDB: CALL IDENTITY()
Informix: select dbinfo('sqlca.sqlerrd1') from systables where tabid=1
MySql: SELECT LAST_INSERT_ID()
SqlServer: SELECT SCOPE_IDENTITY()
SYBASE: SELECT @@IDENTITY
JDBC: This will configure MBG to generate code for MyBatis3 suport of JDBC standard generated keys. This is a database independent method of obtaining the value from identity columns.
identity: 自增主鍵 If true, then the column is flagged as an identity column and the generated <selectKey> element will be placed after the insert (for an identity column). If false, then the generated <selectKey> will be placed before the insert (typically for a sequence).
-->
<generatedKey column="" sqlStatement="" identity="" type=""/>
<!-- optional.
列的命名規則:
MBG使用 <columnRenamingRule> 元素在計算列名的對應 名稱以前,先對列名進行重命名,
做用:通常須要對BUSI_CLIENT_NO 前的BUSI_進行過濾
支持正在表達式
searchString 表示要被換掉的字符串
replaceString 則是要換成的字符串,默認狀況下爲空字符串,可選
-->
<columnRenamingRule searchString="" replaceString=""/>
<!-- optional.告訴 MBG 忽略某一列
column,須要忽略的列
delimitedColumnName:true ,匹配column的值和數據庫列的名稱 大小寫徹底匹配,false 忽略大小寫匹配
是否限定表的列名,即固定表列在Model中的名稱
-->
<ignoreColumn column="PLAN_ID" delimitedColumnName="true" />
<!--optional.覆蓋MBG對Model 的生成規則
column: 數據庫的列名
javaType: 對應的Java數據類型的徹底限定名
在 必要的時候能夠覆蓋由JavaTypeResolver計算獲得的java數據類 型. For some databases, this is necessary to handle "odd" database types (e.g. MySql's unsigned bigint type should be mapped to java.lang.Object).
jdbcType: 該列的JDBC數據類型(INTEGER, DECIMAL, NUMERIC, VARCHAR, etc.),該列能夠覆蓋由 JavaTypeResolver計算獲得的Jdbc類型,對某些數據庫而言,對於處理特定的JDBC 驅動癖好 頗有必要 (e.g. DB2's LONGVARCHAR type should be mapped to VARCHAR for iBATIS).
typeHandler:
-->
<columnOverride column="" javaType="" jdbcType="" typeHandler="" delimitedColumnName="" />
</table>
</context>
</generatorConfiguration>
這裏使用了外置的配置文件generator.properties,能夠將一下屬性配置到properties文件之中,增長配置的靈活性:
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jdbc.driverLocation=D:\\maven\\com\\oracle\\ojdbc14\\10.2.0.4.0\\ojdbc14-10.2.0.4.0.jar
jdbc.driverClass=oracle.jdbc.driver.OracleDriver
jdbc.connectionURL=jdbc:oracle:thin:@//localhost:1521/XE
jdbc.userId=LOUIS
jdbc.password=123456
項目目錄以下:
以後彈出運行配置框,爲當前配置配置一個名稱,這裏其名爲"generator",而後在 「Command line」 選項中輸入「mybatis-generator:generate -e」
這裏加了「-e 」選項是爲了讓該插件輸出詳細信息,這樣能夠幫助咱們定位問題。
若是添加成功,則會在run 選項中有「generator」 選項,以下:
點擊運行,而後不出意外的話,會在控制檯輸出:
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C:\Java\jdk1.7.0_71\bin\java -Dmaven.home=D:\software\apache-maven-3.0.5-bin -Dclassworlds.conf=D:\software\apache-maven-3.0.5-bin\bin\m2.conf -Didea.launcher.port=7533 "-Didea.launcher.bin.path=D:\applications\JetBrains\IntelliJ IDEA 14.0.2\bin" -Dfile.encoding=UTF-8 -classpath "D:\software\apache-maven-3.0.5-bin\boot\plexus-classworlds-2.4.jar;D:\applications\JetBrains\IntelliJ IDEA 14.0.2\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain org.codehaus.classworlds.Launcher -Didea.version=14.0.2 -s D:\software\apache-maven-3.0.5-bin\conf\settings.xml mybatis-generator:generate -e
[INFO] Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building hometutor Maven Webapp 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- mybatis-generator-maven-plugin:1.3.2:generate (default-cli) @ hometutor ---
[INFO] Connecting to the Database
[INFO] Introspecting table louis.lession
log4j:WARN No appenders could be found for logger (org.mybatis.generator.internal.db.DatabaseIntrospector).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[INFO] Generating Example class for table LOUIS.LESSION
[INFO] Generating Record class for table LOUIS.LESSION
[INFO] Generating Mapper Interface for table LOUIS.LESSION
[INFO] Generating SQL Map for table LOUIS.LESSION
[INFO] Saving file LessionMapper.xml
[INFO] Saving file LessionExample.java
[INFO] Saving file Lession.java
[INFO] Saving file LessionMapper.java
[WARNING] Root class com.foo.louis.Hello cannot be loaded, checking for member overrides is disabled for this class
[WARNING] Existing file E:\sources\tutor\src\main\java\org\louis\hometutor\po\Lession.java was overwritten
[WARNING] Existing file E:\sources\tutor\src\main\java\com\foo\tourist\dao\LessionMapper.java was overwritten
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.334s
[INFO] Finished at: Tue Jan 27 12:04:08 CST 2015
[INFO] Final Memory: 8M/107M
[INFO] ------------------------------------------------------------------------
Process finished with exit code 0
好,看到BUILD SUCCESS,則大功告成,若是有錯誤的話,因爲添加了-e 選項,會把具體的詳細錯誤信息打印出來的,根據錯誤信息修改便可