逆向工程优化自定义Dao名自定义异常

浅浅的花香味﹌ 2023-06-28 04:52 79阅读 0赞

## 前言 ##

应公司需求需要对于Mybatis-generator进行改装，符合生产期望

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##### 准备工具 #####

**JDK 1.8 ， jd-gui反编译工具， idea Maven新建初始项目**

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## 正文 ##

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## 步骤 一： ##

下载Mybaitis-generator.jar包

新建一个maven工程，使用maven的Download Sources，获得mybatis-generator-core的源码。

pom.xml里面添加以下代码即可出现jar包：

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

或者进入pom  
![在这里插入图片描述][2020010714343269.png]

![在这里插入图片描述][20200107143438128.png]

进入pom右击，找到 show in Explorer选项点击进入文件夹既可看到 jar包：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70]

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## 步骤二 ： ##

建立文件夹genertorClass文件夹，拿出mybatis-generator-core-1.3.2.jar包

![在这里插入图片描述][2020010714345012.png]  
解压文件获得两个文件，一个配置文件一个项目文件；

再建立文件夹 generatorJava文件，使用jd-gui进行反编译；

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 1]

编译完成，下载为java文件；

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 2]

下载完成之后，放入generatorJava文件夹；

使用idea打开genertaor项目源码；

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 3]

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如果需要看源码的，需要改变一下，如果不需要此段可以省略

如下图所示：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 4]

简单改装一下。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 5]

引入pom依赖，否则报错；

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 6]

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## 步骤三： ##

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搜索IntrospectedTable类；  
![在这里插入图片描述][20200107143544844.png]

第820行，将 sb.append(“Mapper”); // N O N − N L S − 1 NON-NLS-1 NON−NLS−1 改成sb.append(“Dao”); //修改Dao包名

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 7]

初始化后缀是拼接的，本来应该是mapper更改后拼接为 ：如下图

![在这里插入图片描述][20200107143557113.png]

关于dao层的后缀为mapper以及修改为Dao

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关于异常类抛出使用自定义异常

如果不修改为抛出运行时异常，修改为自定义异常需求；

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## 步骤一 ； ##

搜索 FullyQualifiedJavaType 类

277行

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 8]

修改为

![在这里插入图片描述][2020010714365138.png]

搜索 ExampleGenerator 类

479行 引入

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 9]

搜索运行时异常，全部替换为自定义异常；

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 10]

步骤二；

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把这两个文件，编译一下；

![在这里插入图片描述][20200107143748227.png]

复制粘贴替换上文保存的CLASS，generatorClass文件夹对于的目录下面； 替换

打包

![在这里插入图片描述][20200107143745734.png]

打包完成后生成jar包；

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 11]

![在这里插入图片描述][20200107143814965.png]

## 步骤三 ； ##

搜索MAVEN仓库里面的genertaor 1.3.2 进行替换仓库里面的jar；

![在这里插入图片描述][20200107143832161.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 12]

运行即可

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## 关于运行generator插件 ##

## 步骤一； ##

--------------------

pom.xml添加插件

build>
        <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>
                <dependencies>
                    
     <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.15</version>
                    </dependency>
                    
     <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.2</version>
                    </dependency>
                    
     <dependency>
                        <groupId>org.mybatis</groupId>
                        <artifactId>mybatis</artifactId>
                        <version>3.2.2</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

<configuration>
        
     <verbose>true</verbose>
        
     <overwrite>true</overwrite>
        
     <configurationFile>
            src/main/resources/mybatis-generator.xml
        </configurationFile>
    </configuration>

可以指定配置文件路径，以及名称。默认为配置文件名称为 generatorConfig.xml

## 步骤二； ##

配置文件

<?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="mysql" defaultModelType="hierarchical" targetRuntime="MyBatis3Simple" >
    
        
        <property name="autoDelimitKeywords" value="false"/>
        
        <property name="javaFileEncoding" value="UTF-8"/>
        
        <property name="javaFormatter" value="org.mybatis.generator.api.dom.DefaultJavaFormatter"/>
        
        <property name="xmlFormatter" value="org.mybatis.generator.api.dom.DefaultXmlFormatter"/>
    
        
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>
    
        
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql:///pss" userId="root" password="admin">
            
        </jdbcConnection>
    
        
        <javaTypeResolver type="org.mybatis.generator.internal.types.JavaTypeResolverDefaultImpl">
            
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
    
    
        
        <javaModelGenerator targetPackage="com._520it.mybatis.domain" targetProject="src/main/java">
            
            <property name="constructorBased" value="false"/>
    
            
            <property name="enableSubPackages" value="true"/>
    
            
            <property name="immutable" value="false"/>
    
            
            <property name="rootClass" value="com._520it.mybatis.domain.BaseDomain"/>
    
            
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
    
    
        
        <sqlMapGenerator targetPackage="com._520it.mybatis.mapper" targetProject="src/main/resources">
            
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
    
    
        
        <javaClientGenerator targetPackage="com._520it.mybatis.mapper" type="ANNOTATEDMAPPER" targetProject="src/main/java">
            
            <property name="enableSubPackages" value="true"/>
    
            
        </javaClientGenerator>
    
        
        <table tableName="userinfo" >
    
            
            <property name="constructorBased" value="false"/>
    
            
            <property name="ignoreQualifiersAtRuntime" value="false"/>
    
            
            <property name="immutable" value="false"/>
    
            
            <property name="modelOnly" value="false"/>
    
            
    
            
    
            
    
            
    
            
    
            
            <property name="selectAllOrderByClause" value="age desc,username asc"/>
    
            
            <property name="useActualColumnNames" value="false"/>
    
    
            
    
            
    
    
             
             <columnOverride column="username">
                 
                 <property name="property" value="userName"/>
    
                 
    
                 
    
                 
    
                 
             </columnOverride>
    
             
        </table>
    
    </context>
    
    </generatorConfiguration>

步骤三；

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运行  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 13]

双击启动；

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDU1MDQ5MA_size_16_color_FFFFFF_t_70 14]

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