原文連結:https://www.cnblogs.com/miketwais/articles/mybatisgenerate_oracle.html

SpringBoot+Mybatis+mybatis generate+oracle配置方法記錄，以便不時之需。

1.建立springboot專案，參見以前的文章。

File -> New -> Project -> Spring Initalizr

Next ->填寫Project Metadata，其中Type選擇Maven Project

Next ->按需選擇依賴，如Web-Web，SQL-MyBatis

Next -> Finish

2.配置oracle和mybatis

看看配置好的pom.xml

<?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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>12.1.0.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!-- mybatis generator 自動生成程式碼外掛 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <dependencies>
                    <dependency>
                        <groupId>com.oracle</groupId>
                        <artifactId>ojdbc6</artifactId>
                        <version>12.1.0.1.0</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

看看application.properties

spring.datasource.driverClassName=oracle.jdbc.driver.OracleDriver
spring.datasource.url=jdbc:oracle:thin:@//101.210.212.244:1521/XE
spring.datasource.username=UNI_CARD
spring.datasource.password=UNI_CARD

#spring.datasource.driver-class-name=com.mysql.jdbc.Driver

#mybatis.config-location=classpath:mybatis-config.xml
mybatis.typeAliasesPackage=com.example.demo.model
mybatis.mapper-locations=classpath:mybatis.mapping/*.xml

看看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="oraclegenerator" targetRuntime="MyBatis3Simple">

        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自動生成的註釋 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>

        <jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver"
                        connectionURL="jdbc:oracle:thin:@101.210.212.244:1521:XE"
                        userId="UNI_CARD"
                        password="UNI_CARD"/>

        <javaModelGenerator targetPackage="com.example.demo.model" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!--生成對映檔案存放位置-->
        <sqlMapGenerator targetPackage="mybatis.mapping" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <javaClientGenerator targetPackage="com.example.demo.mapper" type="XMLMAPPER" targetProject="src/main/java">
            <!-- 在targetPackage的基礎上，根據資料庫的schema再生成一層package，最終生成的類放在這個package下，預設為false -->
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <table tableName="ACCESS_TYPE" domainObjectName="ACCESS_TYPE"/>
    </context>
</generatorConfiguration>

關鍵點就是上面的幾個配置檔案，然後需要建立相應的資料夾，必須對應好才不會出錯！！！

關於在maven中引用oracle，因為orcale收費不允許maven引用，需要下載到本地倉庫使用，具體方法參見：https://www.cnblogs.com/cnsevennight/p/6586801.html

到此就配置完成。

3.使用mybatis-generate生成相應的mapper.xml,mapper檔案及實體類。

雙擊即可。

注意：

常見問題應答：

報錯：Table configuration with catalog null錯誤

解決方法：需要去掉generatorConfig.xml中<table>標籤中的schema屬性,MySQL則不需要去掉。