Intellij IDEA 14中使用MyBatis-generator 自动生成MyBatis代码
Intellij IDEA 14 作為Java IDE 神器，接觸后發(fā)現(xiàn)，非常好用，對它愛不釋手，打算離開eclipse和myeclipse，投入Intellij IDEA的懷抱。
???? 然而在使用的過程中會發(fā)現(xiàn)Intellij IDEA也有一些不盡如意的地方，難免會有些不爽：Intellij IDEA 的插件庫遠(yuǎn)不及eclipse的豐富。 mybatis-generator在eclipse中有專門的插件，而沒有開發(fā)出Intellij IDEA能夠使用的插件。
??? 不過不用灰心，如果你的項目是使用maven組織的，那么我們可以在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。
STEP 0.在Intellij IDEA創(chuàng)建maven項目（本過程比較簡單，略）
STEP 1. 在maven項目的pom.xml 添加mybatis-generator-maven-plugin 插件
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<build>??
??<finalName>xxx</finalName>??
??<plugins>??
????<plugin>??
??????<groupId>org.mybatis.generator</groupId>??
??????<artifactId>mybatis-generator-maven-plugin</artifactId>??
??????<version>1.3.2</version>??
??????<configuration>??
????????<verbose>true</verbose>??
????????<overwrite>true</overwrite>??
??????</configuration>??
????</plugin>??
??</plugins>??
</build>??
STEP 2. 在maven項目下的src/main/resources 目錄下建立名為 generatorConfig.xml的配置文件，作為mybatis-generator-maven-plugin 插件的執(zhí)行目標(biāo)，模板如下：
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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(dǎo)入屬性配置?-->??
????<properties?resource="generator.properties"></properties>??
??
????<!--指定特定數(shù)據(jù)庫的jdbc驅(qū)動jar包的位置?-->??
????<classPathEntry?location="${jdbc.driverLocation}"/>??
??
????<context?id="default"?targetRuntime="MyBatis3">??
??
??
????????<!--?optional，旨在創(chuàng)建class時，對注釋進(jìn)行控制?-->??
????????<commentGenerator>??
????????????<property?name="suppressDate"?value="true"?/>??
????????</commentGenerator>??
??
??
????????<!--jdbc的數(shù)據(jù)庫連接?-->??
????????<jdbcConnection?driverClass="${jdbc.driverClass}"?connectionURL="${jdbc.connectionURL}"?userId="${jdbc.userId}"?password="${jdbc.password}">??
????????</jdbcConnection>??
??
??
??
????????<!--?非必需，類型處理器，在數(shù)據(jù)庫類型和java類型之間的轉(zhuǎn)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(gòu)造函數(shù)?-->??
????????????<property?name="constructorBased"?value="true"/>??
??
????????????<!--?是否允許子包，即targetPackage.schemaName.tableName?-->??
????????????<property?name="enableSubPackages"?value="false"/>??
??
????????????<!--?建立的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(gòu)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(shù)據(jù)進(jìn)行trim操作?-->??
????????????<property?name="trimStrings"?value="true"/>??
????????</javaModelGenerator>??
??
????????<!--Mapper映射文件生成所在的目錄?為每一個數(shù)據(jù)庫的表生成對應(yīng)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，生成易于使用的針對Model對象和XML配置文件?的代碼??
????????????????type="ANNOTATEDMAPPER",生成Java?Model?和基于注解的Mapper對象??
????????????????type="MIXEDMAPPER",生成基于注解的Java?Model?和相應(yīng)的Mapper對象??
????????????????type="XMLMAPPER",生成SQLMap?XML文件和獨(dú)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：如果?targetRuntime="MyBatis3",此參數(shù)被忽略??
?????????????-->??
????????????<property?name="exampleMethodVisibility"?value=""/>??
????????????<!--??
???????????????????????????????????????????方法名計數(shù)器??
??????????????Important?note:?this?property?is?ignored?if?the?target?runtime?is?MyBatis3.??
?????????????-->??
????????????<property?name="methodNameCalculator"?value=""/>??
??
????????????<!--?
????????????????????????????????????????????????為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）??
???????????????如果指定此元素，MBG將會生成<selectKey>元素，然后將此元素插入到SQL?Map的<insert>?元素之中??
???????????????sqlStatement?的語句將會返回新的值??
???????????????如果是一個自增主鍵的話，你可以使用預(yù)定義的語句,或者添加自定義的SQL語句.?預(yù)定義的值如下:??
??????????????????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(guī)則：??
????????????????????MBG使用?<columnRenamingRule>?元素在計算列名的對應(yīng)?名稱之前，先對列名進(jìn)行重命名，??
????????????????????作用：一般需要對BUSI_CLIENT_NO?前的BUSI_進(jìn)行過濾??
????????????????????支持正在表達(dá)式??
?????????????????????searchString?表示要被換掉的字符串??
?????????????????????replaceString?則是要換成的字符串，默認(rèn)情況下為空字符串，可選??
????????????-->??
????????????<columnRenamingRule?searchString=""?replaceString=""/>??
??
??
??
????????????<!--?optional.告訴?MBG?忽略某一列??
????????????????????column，需要忽略的列??
????????????????????delimitedColumnName:true?,匹配column的值和數(shù)據(jù)庫列的名稱?大小寫完全匹配，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(guī)則??
?????????????????column:?數(shù)據(jù)庫的列名??
?????????????????javaType:?對應(yīng)的Java數(shù)據(jù)類型的完全限定名??
?????????????????在必要的時候可以覆蓋由JavaTypeResolver計算得到的java數(shù)據(jù)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(shù)據(jù)類型(INTEGER,?DECIMAL,?NUMERIC,?VARCHAR,?etc.)，該列可以覆蓋由JavaTypeResolver計算得到的Jdbc類型，對某些數(shù)據(jù)庫而言，對于處理特定的JDBC?驅(qū)動癖好?很有必要(e.g.?DB2's?LONGVARCHAR?type?should?be?mapped?to?VARCHAR?for?iBATIS).??
?????????????????typeHandler:??
??
????????????-->??
????????????<columnOverride?column=""?javaType=""????jdbcType=""?typeHandler=""??delimitedColumnName=""?/>??
??
????????</table>??
????</context>??
</generatorConfiguration>??
這里使用了外置的配置文件generator.properties，可以將一下屬性配置到properties文件之中，增加配置的靈活性：
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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??
項目目錄如下：
STEP 3. 在Intellij IDEA添加一個“Run運(yùn)行”選項，使用maven運(yùn)行mybatis-generator-maven-plugin插件 ：
之后彈出運(yùn)行配置框，為當(dāng)前配置配置一個名稱，這里其名為"generator",然后在 “Command line” 選項中輸入“mybatis-generator:generate? -e”
這里加了“-e ”選項是為了讓該插件輸出詳細(xì)信息，這樣可以幫助我們定位問題。
如果添加成功，則會在run 選項中有“generator” 選項，如下：
點(diǎn)擊運(yùn)行，然后不出意外的話，會在控制臺輸出：
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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，如果有錯誤的話，由于添加了-e 選項，會把具體的詳細(xì)錯誤信息打印出來的，根據(jù)錯誤信息修改即可
轉(zhuǎn)載于:https://blog.51cto.com/1306733/1738370
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