注釋生成器

為了生成db里面的注釋，必須自定義注釋生成器

EmptyCommentGenerator：

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.*;

import org.mybatis.generator.api.dom.xml.XmlElement;

import java.util.Properties;

import java.util.Set;

public class EmptyCommentGenerator implements CommentGenerator {

@Override

public void addConfigurationProperties(Properties properties) {

}

@Override

public void addFieldComment(Field field, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn) {

}

@Override

public void addFieldComment(Field field, IntrospectedTable introspectedTable) {

}

@Override

public void addModelClassComment(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {

}

@Override

public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable) {

}

@Override

public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable, boolean b) {

}

@Override

public void addEnumComment(InnerEnum innerEnum, IntrospectedTable introspectedTable) {

}

@Override

public void addGetterComment(Method method, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn) {

}

@Override

public void addSetterComment(Method method, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn) {

}

@Override

public void addGeneralMethodComment(Method method, IntrospectedTable introspectedTable) {

}

@Override

public void addJavaFileComment(CompilationUnit compilationUnit) {

}

@Override

public void addComment(XmlElement xmlElement) {

}

@Override

public void addRootComment(XmlElement xmlElement) {

}

@Override

public void addGeneralMethodAnnotation(Method method, IntrospectedTable introspectedTable, Set set) {

}

@Override

public void addGeneralMethodAnnotation(Method method, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn, Set set) {

}

@Override

public void addFieldAnnotation(Field field, IntrospectedTable introspectedTable, Set set) {

}

@Override

public void addFieldAnnotation(Field field, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn, Set set) {

}

@Override

public void addClassAnnotation(InnerClass innerClass, IntrospectedTable introspectedTable, Set set) {

}

}

MySQLCommentGenerator：

import java.util.Properties;

import org.mybatis.generator.api.IntrospectedColumn;

import org.mybatis.generator.api.IntrospectedTable;

import org.mybatis.generator.api.dom.java.Field;

import org.mybatis.generator.api.dom.java.TopLevelClass;

/**

* Created by qhong on 2019/3/22 14:10

**/

public class MySQLCommentGenerator extends EmptyCommentGenerator {

private Properties properties;

public MySQLCommentGenerator() {

properties = new Properties();

}

@Override

public void addConfigurationProperties(Properties properties) {

// 獲取自定義的 properties

this.properties.putAll(properties);

}

@Override

public void addModelClassComment(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {

// 獲取表注釋

String remarks = introspectedTable.getRemarks();

topLevelClass.addJavaDocLine("/**");

topLevelClass.addJavaDocLine(" * " + remarks);

topLevelClass.addJavaDocLine(" */");

}

@Override

public void addFieldComment(Field field, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn) {

// 獲取列注釋

String remarks = introspectedColumn.getRemarks();

field.addJavaDocLine("/**");

field.addJavaDocLine(" * " + remarks);

field.addJavaDocLine(" */");

}

}

代碼生成配置

mybatis-generator.xml

/p>

PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"

"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

connectionURL="jdbc:mysql://18.16.200.42:3306/personnel-dev"

userId="root"

password="shitou$root">

注意其中的commentGenerator節(jié)點(diǎn)，引用的是自定義的類

上面的網(wǎng)上都有，但是網(wǎng)上一般都是自己寫main方法調(diào)用

我這邊不想寫main方法，還是用maven插件命令進(jìn)行調(diào)用

pom.xml插件配置：

org.mybatis.generator

mybatis-generator-maven-plugin

1.3.7

mysql

mysql-connector-java

5.1.39

org.mybatis.generator

mybatis-generator-core

1.3.7

com.jsy

order-persistence

1.0.0-SNAPSHOT

Generate MyBatis Artifacts

true

true

src/main/resources/mybatis-generator.xml

goal：

其中g(shù)oals注釋，是因?yàn)閙ybatis-generator.xml中，如果沒有table標(biāo)簽，那么package就會(huì)報(bào)錯(cuò)

[ERROR] Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.7:generate (Generate MyBatis Artifacts) on project order-persistence: XML Parser Error on line 70: 元素類型為 "context" 的內(nèi)

容不完整, 它必須匹配 "(property*,plugin*,commentGenerator?,(connectionFactory|jdbcConnection),javaTypeReso

lver?,javaModelGenerator,sqlMapGenerator?,javaClientGenerator?,table+)"。 -> [Help 1]

插件配置的引用

注意插件配置中的引用依賴

com.jsy

order-persistence

1.0.0-SNAPSHOT

這是我項(xiàng)目中的一個(gè)模塊，就是上面自定義注釋生成器所在項(xiàng)目的模塊，而且這個(gè)模塊還要引用

org.mybatis.generator

mybatis-generator-core

1.3.7

mybatis-generator 的plugin有自己的classpath，我們?cè)陧?xiàng)目中直接繼承的類和plugin不屬于同一個(gè)classpath

這其實(shí)是不同的兩個(gè)維度。

命令生成代碼

全都配置好以后，還需要將注釋生成器所在模塊使用maven命令install到本地，

這樣就可以使用下面命令生成代碼

mvn mybatis-generator:generate

如果本地并沒有注釋生成器所在模塊，那么就會(huì)報(bào)異常：

[ERROR] Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.7:generate (default-cli) on project order-persistence: Execution default-cli of goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.7:generate failed: Cannot instantiate object of type com.jsy.order.config.mybatis.MySQLCommentGenerator -> [Help 1]

參考

總結(jié)

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