idea创建ssm 工程骨架（2） generator反向生成

淡淡的烟草味﹌ 2021-10-12 21:23 346阅读 0赞

关于项目骨架的创建过程，请查看上一篇文章：

[https://blog.csdn.net/lettuce\_/article/details/99716418][https_blog.csdn.net_lettuce_article_details_99716418]

这期文章主要记录骨架中generator的使用以及相关配置文件的填写等

# generator 反向生成 #

1. 在父工程ssm的pom文件中 ，添加 jdbc驱动

<dependencies>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.6</version>
            </dependency>
      </dependencies>

2.在ssm\_dao 模块下创建相关文件夹

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70][]

3. 在utils模块的resources中创建 generator文件夹，在文件夹下创建2个配置文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 1][]

4. generator.properties 文件的编写

#Mybatis Generator configuration
    project=D:/IdeaProjects/ssm/ssm_dao/src/main/java
    resources=D:/IdeaProjects/ssm/ssm_dao/src/main/resources
    jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://127.0.0.1:3306/test
    jdbc.user=root
    jdbc.password=admin

5.generatorConfig.xml文件的编写

<?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>
        
        
        <properties resource="generator/generator.properties"/>
        
        <classPathEntry location="D:\repository\mysql\mysql-connector-java\5.1.6\mysql-connector-java-5.1.6.jar" />
    
        
        
        <context id="MysqlTables" targetRuntime="MyBatis3Simple" defaultModelType="flat">
            
            <property name="autoDelimitKeywords" value="true" />
            
            <property name="javaFileEncoding" value="utf-8" />
            
            <property name="beginningDelimiter" value="`" />
            <property name="endingDelimiter" value="`" />
    
            
            <property name="javaFormatter" value="org.mybatis.generator.api.dom.DefaultJavaFormatter"/>
            
            <property name="xmlFormatter" value="org.mybatis.generator.api.dom.DefaultXmlFormatter"/>
            <plugin type="org.mybatis.generator.plugins.SerializablePlugin" />
    
            <plugin type="org.mybatis.generator.plugins.ToStringPlugin" />
    
            
            <commentGenerator >
                <property name="suppressAllComments" value="true"/>
                <property name="suppressDate" value="true" /> 
            </commentGenerator>
    
            
            <jdbcConnection driverClass="${jdbc.driver}" connectionURL="${jdbc.url}" userId="${jdbc.user}" password="${jdbc.password}" />
            
            <javaTypeResolver>
                
                <property name="forceBigDecimals" value="false"/>
            </javaTypeResolver>
    
            
            <javaModelGenerator targetPackage="com.jhr.po" targetProject="${project}" >
                <property name="enableSubPackages" value="false"/>
                <property name="trimStrings" value="true"/>
            </javaModelGenerator>
            
            <sqlMapGenerator targetPackage="mappers" targetProject="${resources}">
                <property name="enableSubPackages" value="true"/>
            </sqlMapGenerator>
            
            <javaClientGenerator targetPackage="com.jhr.dao" targetProject="${project}" type="XMLMAPPER" >
                <property name="enableSubPackages" value="false" />
            </javaClientGenerator>
            
            
            
            
            
            
    
            
            <table tableName="book" enableCountByExample="true" enableUpdateByExample="true" enableDeleteByExample="true" enableSelectByExample="true" selectByExampleQueryId="true">
                <property name="useActualColumnNames" value="false" />
                
                <generatedKey column="book_id" sqlStatement="Mysql" identity="true" />
            </table>
    
        </context>
    </generatorConfiguration>

6. 在ssm\_utils 模块的pom文件中添加**mybatis-generator**的配置

<?xml version="1.0" encoding="UTF-8"?>
    <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">
        <parent>
            <artifactId>ssm</artifactId>
            <groupId>com.jhr</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>ssm_utils</artifactId>
    
    
        <build>
    
            <pluginManagement>
                <plugins>
    
                    
                    <plugin>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-maven-plugin</artifactId>
                        <version>1.3.2</version>
                        <configuration>
                            <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
                            <overwrite>true</overwrite>
                            <verbose>true</verbose>
                        </configuration>
                    </plugin>
                </plugins>
            </pluginManagement>
        </build>
    
    </project>

7. Add New Configurations

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 3][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 4][]

8. 点击 运行 即可

![20190819164610112.png][]

结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 5][]

## 解释： ##

A ：关于 generatorConfig.xml文件 更改哪些地方

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 7][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 8][]

B：关于 生成文件的  targetProject 路径为什么是绝对路径

尝试使用相对路径 ，但报错，找不到文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 9][]

原因是： 第7步中的Add New Configurations 里，指定的Working directory 是ssm\_utils 子模块，如果使用相对路径，则无法从ssm\_utils子模块 跨模块 到ssm\_dao子模块

![20190819170716464.png][]

以前其他案例使用相对路径成功的原因：项目只有一个工程，没有使用父子工程结构，generator和相对路径是 在同一工程的同一模块下，例如：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xldHR1Y2Vf_size_16_color_FFFFFF_t_70 10][]

### 如果非要使用相对路径，可以**尝试**将 generator 创建在ssm\_dao 模块下，其他步骤大致同上。这样就可以不用跨模块调用了。 ###

[https_blog.csdn.net_lettuce_article_details_99716418]: https://blog.csdn.net/lettuce_/article/details/99716418
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