Mybatis Generator的model生成中文註釋,支持oracle和mysql(經過修改源碼的方式來實現)

在看本篇以前,最好先看一下上一篇經過實現CommentGenerator接口的方法來實現中文註釋的例子,由於不少操做和上一篇基本是一致的,因此本篇可能不那麼詳細.

首先說一下上篇經過實現CommentGenerator接口的一些不足,畢竟只是實現了CommentGenerator接口,在裏面的方法再怎麼改,有效的也只是針對model類,而且使用的人大概也發現了,裏面的addClassComment方法都知道是在類文件上面生成註釋,可是不管咱們在這個方法實現裏寫什麼都沒有效果,其實由於MGB默認是沒有調用這個方法的,這個時候若是有需求但願生成的類文件自動加了類文檔說明就辦不到了,而若是在源代碼的基礎上修改,就好辦多了,想怎麼改就怎麼改,只要找對地方,什麼樣的須要均可以本身寫代碼來實現.

• 首先同樣,本身新建一個maven項目,怎麼作就不詳細說了,前一篇有,都弄好後,修改pom.xml文件,首先引入MBG的源碼,在pom.xml中加入依賴

　　　　<dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
        </dependency>

　　保存事後就會自動下載mybatis-generator-core的jar包,而後咱們到本身的本地倉庫中去找存放這個jar包的位置,下載下來後pom.xml中這個依賴能夠刪除了.

 

咱們會看到不只下載了jar包,源代碼也一塊兒下載了,用壓縮軟件打開source,jar,複製org文件夾及其內全部文件到本身的eclipse創建的maven項目中,這樣就取得了MBG的源代碼,你也能夠在

http://search.maven.org中搜索mybatis-generator-core而後點擊source.jar來直接下載源碼.

• 第一步獲得源代碼後以後,複製到項目中咱們會發現是報錯的,由於有依賴包沒有引入,缺乏log4j和ant包,在pom.xml中添加上依賴,順便添加了oracle和mysql的驅動程序包,oracle的本地安裝從上一篇中能夠看到,加入後項目就沒有錯誤了

　　　　  <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>6.0</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.9</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.7</version>
        </dependency>
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.9.0</version>
        </dependency>

這個時候咱們的項目結構應該是這個樣子的

而後就很簡單了,在源代碼裏找到 org.mybatis.generator.internal.DefaultCommentGenerator類,隨便改吧,本身diy,如下是一個樣本

/*
 *  Copyright 2008 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.mybatis.generator.internal;

import static org.mybatis.generator.internal.util.StringUtility.isTrue;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;

import org.mybatis.generator.api.CommentGenerator;
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.dom.java.CompilationUnit;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.api.dom.java.InnerClass;
import org.mybatis.generator.api.dom.java.InnerEnum;
import org.mybatis.generator.api.dom.java.JavaElement;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.config.MergeConstants;
import org.mybatis.generator.config.PropertyRegistry;

/**
 * @author Jeff Butler
 * 
 */
public class DefaultCommentGenerator implements CommentGenerator {

    private Properties properties;
    private Properties systemPro;
    private boolean suppressDate;
    private boolean suppressAllComments;
    private String currentDateStr;

    public DefaultCommentGenerator() {
        super();
        properties = new Properties();
        systemPro = System.getProperties();
        suppressDate = false;
        suppressAllComments = false;
        currentDateStr = (new SimpleDateFormat("yyyy-MM-dd")).format(new Date());
    }

    public void addJavaFileComment(CompilationUnit compilationUnit) {
        // add no file level comments by default
        return;
    }

    /**
     * Adds a suitable comment to warn users that the element was generated, and
     * when it was generated.
     */
    public void addComment(XmlElement xmlElement) {
        return;
    }

    public void addRootComment(XmlElement rootElement) {
        // add no document level comments by default
        return;
    }

    public void addConfigurationProperties(Properties properties) {
        this.properties.putAll(properties);

        suppressDate = isTrue(properties.getProperty(PropertyRegistry.COMMENT_GENERATOR_SUPPRESS_DATE));

        suppressAllComments = isTrue(properties.getProperty(PropertyRegistry.COMMENT_GENERATOR_SUPPRESS_ALL_COMMENTS));
    }

    /**
     * This method adds the custom javadoc tag for. You may do nothing if you do
     * not wish to include the Javadoc tag - however, if you do not include the
     * Javadoc tag then the Java merge capability of the eclipse plugin will
     * break.
     * 
     * @param javaElement
     *            the java element
     */
    protected void addJavadocTag(JavaElement javaElement, boolean markAsDoNotDelete) {
        javaElement.addJavaDocLine(" *");
        StringBuilder sb = new StringBuilder();
        sb.append(" * ");
        sb.append(MergeConstants.NEW_ELEMENT_TAG);
        if (markAsDoNotDelete) {
            sb.append(" do_not_delete_during_merge");
        }
        String s = getDateString();
        if (s != null) {
            sb.append(' ');
            sb.append(s);
        }
        javaElement.addJavaDocLine(sb.toString());
    }

    /**
     * This method returns a formated date string to include in the Javadoc tag
     * and XML comments. You may return null if you do not want the date in
     * these documentation elements.
     * 
     * @return a string representing the current timestamp, or null
     */
    protected String getDateString() {
        String result = null;
        if (!suppressDate) {
            result = currentDateStr;
        }
        return result;
    }

    public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable) {
        if (suppressAllComments) {
            return;
        }
        StringBuilder sb = new StringBuilder();
        innerClass.addJavaDocLine("/**");
        sb.append(" * ");
        sb.append(introspectedTable.getFullyQualifiedTable());
        sb.append(" ");
        sb.append(getDateString());
        innerClass.addJavaDocLine(sb.toString().replace("\n", " "));
        innerClass.addJavaDocLine(" */");
    }

    public void addEnumComment(InnerEnum innerEnum, IntrospectedTable introspectedTable) {
        if (suppressAllComments) {
            return;
        }
        StringBuilder sb = new StringBuilder();
        innerEnum.addJavaDocLine("/**");
        sb.append(" * ");
        sb.append(introspectedTable.getFullyQualifiedTable());
        innerEnum.addJavaDocLine(sb.toString().replace("\n", " "));
        innerEnum.addJavaDocLine(" */");
    }

    public void addFieldComment(Field field, IntrospectedTable introspectedTable,
            IntrospectedColumn introspectedColumn) {
        if (suppressAllComments) {
            return;
        }
        StringBuilder sb = new StringBuilder();
        field.addJavaDocLine("/**");
        sb.append(" * ");
        sb.append(introspectedColumn.getRemarks());
        field.addJavaDocLine(sb.toString().replace("\n", " "));
        field.addJavaDocLine(" */");
    }

    public void addFieldComment(Field field, IntrospectedTable introspectedTable) {
        if (suppressAllComments) {
            return;
        }
        StringBuilder sb = new StringBuilder();
        field.addJavaDocLine("/**");
        sb.append(" * ");
        sb.append(introspectedTable.getFullyQualifiedTable());
        field.addJavaDocLine(sb.toString().replace("\n", " "));
        field.addJavaDocLine(" */");
    }

    public void addGeneralMethodComment(Method method, IntrospectedTable introspectedTable) {
        if (suppressAllComments) {
            return;
        }
        //      method.addJavaDocLine("/**");
        //      addJavadocTag(method, false);
        //      method.addJavaDocLine(" */");
    }

    public void addGetterComment(Method method, IntrospectedTable introspectedTable,
            IntrospectedColumn introspectedColumn) {
        if (suppressAllComments) {
            return;
        }
        method.addJavaDocLine("/**");
        StringBuilder sb = new StringBuilder();
        sb.append(" * ");
        sb.append(introspectedColumn.getRemarks());
        method.addJavaDocLine(sb.toString().replace("\n", " "));
        sb.setLength(0);
        sb.append(" * @return ");
        sb.append(introspectedColumn.getActualColumnName());
        sb.append(" ");
        sb.append(introspectedColumn.getRemarks());
        method.addJavaDocLine(sb.toString().replace("\n", " "));
        method.addJavaDocLine(" */");
    }

    public void addSetterComment(Method method, IntrospectedTable introspectedTable,
            IntrospectedColumn introspectedColumn) {
        if (suppressAllComments) {
            return;
        }
        method.addJavaDocLine("/**");
        StringBuilder sb = new StringBuilder();
        sb.append(" * ");
        sb.append(introspectedColumn.getRemarks());
        method.addJavaDocLine(sb.toString().replace("\n", " "));
        Parameter parm = method.getParameters().get(0);
        sb.setLength(0);
        sb.append(" * @param ");
        sb.append(parm.getName());
        sb.append(" ");
        sb.append(introspectedColumn.getRemarks());
        method.addJavaDocLine(sb.toString().replace("\n", " "));
        method.addJavaDocLine(" */");
    }

    public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable, boolean markAsDoNotDelete) {
        if (suppressAllComments) {
            return;
        }
        StringBuilder sb = new StringBuilder();
        innerClass.addJavaDocLine("/**");
        sb.append(" * 描述:");
        sb.append(introspectedTable.getFullyQualifiedTable()+"表的實體類");
        innerClass.addJavaDocLine(sb.toString().replace("\n", " "));
        sb.setLength(0);
        sb.append(" * @version");
        innerClass.addJavaDocLine(sb.toString().replace("\n", " "));
        sb.setLength(0);
        sb.append(" * @author:  ");
        sb.append(systemPro.getProperty("user.name"));
        innerClass.addJavaDocLine(sb.toString().replace("\n", " "));
        sb.setLength(0);
        sb.append(" * @建立時間: ");
        sb.append(currentDateStr);
        innerClass.addJavaDocLine(sb.toString().replace("\n", " "));
        innerClass.addJavaDocLine(" */");
    }
}

View Code

爲了是辛辛苦苦寫的addClassComment生效,還得找到org.mybatis.generator.codegen.mybatis3.model.BaseRecordGenerator類,在大約60行的地方,在commentGenerator.addJavaFileComment(topLevelClass);後加一句:

 commentGenerator.addClassComment(topLevelClass, introspectedTable,false);

這樣本身的方法就調用到了,說明一下,仔細看一下源代碼,會發現DefaultCommentGenerator類,會發現addClassComment方法有兩個,一個加了boolean markAsDoNotDelete參數,一個沒有加,你這裏調用的若是不加false參數,就改DefaultCommentGenerator類中兩個參數的addClassComment方法,個人樣例中你會發現方法中傳了參數也無論用,由於真正的源代碼中是有這麼一行的

而後addJavadocTag方法中是這麼調用的

個人樣例中addJavadocTag方法的調用都被刪除了,因此傳個參數也沒啥用.

• 其餘的若是想有什麼改動,就本身去研究源代碼,而後本身手動改了,到這裏就差很少結束了,剩下的工做和上次的同樣,使用mvn clean package命令打成jar包,而後在控制檯使用

java -jar mybatis-generator-core-1.3.2.jar -configfile generatorConfig.xml -overwrite命令運行,貼一下完整的pom.xml和generatorConfig.xml,部分地方和上次仍是有區別的.

pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-generator-coree</artifactId>
    <version>1.3.2</version>
    <packaging>jar</packaging>

    <name>MybatisGenerator</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>6.0</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.9</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.7</version>
        </dependency>
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.9.0</version>
        </dependency>
    </dependencies>


    <build>
        <finalName>mybatis-generator-core-1.3.2</finalName>
        <plugins>
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <appendAssemblyId>false</appendAssemblyId>
                    <archive>
                        <manifest>
                            <mainClass>org.mybatis.generator.api.ShellRunner</mainClass>
                        </manifest>
                    </archive>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>assembly</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

generatorConfig.xml:

<?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>
    <context id="context1" targetRuntime="MyBatis3">
        <!-- 指定生成的java文件的編碼,沒有直接生成到項目時中文可能會亂碼 -->
        <property name="javaFileEncoding" value="UTF-8"/>
        <!-- oracle配置 -->
<!--             <jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver"
            connectionURL="jdbc:oracle:thin:@***:1521:orcl" userId="***"
            password="***">
            針對oracle數據庫
            <property name="remarksReporting" value="true"></property>
        </jdbcConnection> -->
        
         <!-- mysql配置 -->
          <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                  connectionURL="jdbc:mysql://localhost:3306/bookshop" userId="root"
                  password="root">
                    <!-- 針對mysql數據庫 -->
                    <property name="useInformationSchema" value="true"></property>
          </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- dto class -->
        <javaModelGenerator targetPackage="model"
            targetProject="C:\Users\Administrator\Desktop">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!-- mybatis xml file -->
        <sqlMapGenerator targetPackage="dao"
            targetProject="C:\Users\Administrator\Desktop">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!-- mapper class -->
        <javaClientGenerator type="XMLMAPPER"
            targetPackage="dao" targetProject="C:\Users\Administrator\Desktop">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>


        <!--不生成幫助類（Exmaples） -->
        <!-- enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" 
            enableSelectByExample="false" selectByExampleQueryId="false" -->
        <!--已生成的表 <table schema="demo" tableName="USER" domainObjectName="User"></table> -->
        <table schema="" tableName="bookinfo" domainObjectName="BookInfo"
            enableCountByExample="false" enableUpdateByExample="false"
            enableDeleteByExample="false" enableSelectByExample="false"
            selectByExampleQueryId="false">
        </table>

    </context>
</generatorConfiguration>

這裏使用的是默認的就不用指定commentGenerator節點的type屬性了.生成後的model效果以下:

 

生成好的工具下載:

MyGenerator.rar

源碼下載:

MyGenerator-source.rar