目录
1.引入pom
<!--mybatis-generator-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>2.添加配置文件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>
<!--MyBatis3Simple不生成XXXBySample文件-->
<context id="context" targetRuntime="MyBatis3Simple">
<!-- 指定生成的java文件的编码,没有直接生成到项目时中文可能会乱码 -->
<property name="javaFileEncoding" value="UTF-8"/>
<!--配置MyCommentGenerator类，自动生成entity类注释-->
<commentGenerator type="com.my.ssmmaven.util.generator.MyCommentGenerator">
<!--<!– 是否去除自己生成注释 –>-->
<!--<property name="suppressAllComments" value="false"/>-->
<!--<!– 是否去除生成时间 –>-->
<!--<property name="suppressDate" value="true"/>-->
</commentGenerator>
<!--配置数据库Oracle-->
<jdbcConnection
driverClass="oracle.jdbc.driver.OracleDriver"
connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:orcl"
userId="test"
password="test">
<!--针对oracle数据库,不加则生成注释为null-->
<property name="remarksReporting" value="true"/>
</jdbcConnection>
<!-- mysql配置 -->
<!-- <jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/bookshop" userId="root"
password="root">
针对mysql数据库
<property name="useInformationSchema" value="true"></property>
</jdbcConnection> -->
<!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- targetProject:生成Model类的位置,targetPackage:包名位置 -->
<javaModelGenerator targetPackage="com.my.ssmmaven.entity" targetProject=".\src\main\java">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- targetProject:mapper.xml映射文件生成的位置,targetPackage:包名位置 -->
<sqlMapGenerator targetPackage="com.my.ssmmaven.entity" targetProject=".\src\main\java">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!-- targetPackage：mapper接口生成的位置 Dao层,targetPackage:包名位置 -->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.my.ssmmaven.entity" targetProject=".\src\main\java">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</javaClientGenerator>
<!-- 指定数据库表 ,生成对应表及类名,可以生成多个,复制下面这行代码改名-->
<!--
1.是否动态生成查询总条数；
2.是否生成动态删除语句；
3.是否生成动态查询语句；
4.是否生成动态修改语句
5.是否生成插入语句
-->
<table domainObjectName="TestUser" tableName="TEST_USER"
enableCountByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
enableUpdateByExample="false"
enableInsert="false">
<!-- 是否使用数据库字段命名属性；false则使用驼峰式命名 -->
<property name="useActualColumnNames" value="false"/>
</table>
</context>
</generatorConfiguration>3.运行工具类main方法，生成文件
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
import org.springframework.util.ResourceUtils;
public class GeneratorSqlmap {
/**
* mybatis 自动生成方法
*
* @throws Exception 抛出异常
*/
public void generator() throws Exception {
List<String> warnings = new ArrayList<>();
File configFile = ResourceUtils.getFile("classpath:config/generatorConfig.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(true);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
callback, warnings);
myBatisGenerator.generate(null);
}
/**
* main 启动方法
*
* @param args main args
*/
public static void main(String[] args) {
try {
GeneratorSqlmap generatorSqlMap = new GeneratorSqlmap();
generatorSqlMap.generator();
} catch (Exception e) {
e.printStackTrace();
}
}
}
4.自动生成注释，重写jar包中的CommentGenerator 方法
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 org.mybatis.generator.config.MergeConstants;
import org.mybatis.generator.config.PropertyRegistry;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
import static org.mybatis.generator.internal.util.StringUtility.isTrue;
/**
* Mybatis 重写方法，自动生成PO类自带注释配置类
*/
public class MyCommentGenerator implements CommentGenerator {
private Properties properties;
private Properties systemPro;
private boolean suppressDate;
private boolean suppressAllComments;
private String currentDateStr;
public MyCommentGenerator() {
super();
properties = new Properties();
systemPro = System.getProperties();
suppressDate = false;
suppressAllComments = false;
currentDateStr = (new SimpleDateFormat("yyyy-MM-dd")).format(new Date());
}
@Override
public void addJavaFileComment(CompilationUnit compilationUnit) {
}
@Override
public void addComment(XmlElement xmlElement) {
}
@Override
public void addRootComment(XmlElement rootElement) {
}
@Override
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
*/
private void addJavadocTag(JavaElement javaElement) {
javaElement.addJavaDocLine(" *");
StringBuilder sb = new StringBuilder();
sb.append(" * ");
sb.append(MergeConstants.NEW_ELEMENT_TAG);
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
*/
private String getDateString() {
String result = null;
if (!suppressDate) {
result = currentDateStr;
}
return result;
}
@Override
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(" */");
}
@Override
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(" */");
}
@Override
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(" */");
}
@Override
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(" */");
}
@Override
public void addModelClassComment(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {
}
@Override
public void addGeneralMethodComment(Method method, IntrospectedTable introspectedTable) {
if (suppressAllComments) {
return;
}
method.addJavaDocLine("/**");
addJavadocTag(method);
method.addJavaDocLine(" */");
}
@Override
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(" */");
}
@Override
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(" */");
}
@Override
public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable, boolean markAsDoNotDelete) {
if (suppressAllComments) {
return;
}
StringBuilder sb = new StringBuilder();
innerClass.addJavaDocLine("/**");
sb.append(" * ");
sb.append(introspectedTable.getFullyQualifiedTable());
innerClass.addJavaDocLine(sb.toString().replace("\n", " "));
sb.setLength(0);
sb.append(" * @author ");
sb.append(systemPro.getProperty("user.name"));
sb.append(" ");
sb.append(currentDateStr);
innerClass.addJavaDocLine(" */");
}
}