SpringBoot與Mybatis,逆向工程。
阿新 • • 發佈:2020-08-16
本文為實踐SpringBoot、MyBatis、逆向工程:利用idea整合springboot快速啟動項,快速生產一個springboot專案。快速啟動勾選Lombok、Spring Web、MyBatis Framework、MySQL Driver。
最終結果的相關說明如下:
1、專案程式碼目錄結構
2、Maven專案中pom.xml依賴如下:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId><version>2.1.0.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.it</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> <mybatis-generator-maven-plugin.version>1.3.2</mybatis-generator-maven-plugin.version> <mysql-connector-java.version>8.0.13</mysql-connector-java.version> <mybatis-generator-core.version>1.3.2</mybatis-generator-core.version> <mybatis-typehandlers-jsr310>1.0.2</mybatis-typehandlers-jsr310> <lombok.version>1.18.2</lombok.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <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>2.1.3</version> </dependency> <!--Mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!--Mybatis 逆向工程--> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>${mybatis-generator-core.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-typehandlers-jsr310</artifactId> <version>${mybatis-typehandlers-jsr310}</version> </dependency> <!--lombok--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <pluginManagement> <plugins> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>${mybatis-generator-maven-plugin.version}</version> <executions> <execution> <id>Generate MyBatis Artifacts</id> <goals> <goal>generate</goal> </goals> </execution> </executions> <configuration> <configurationFile>src/main/resources/generatorConfig.xml</configurationFile> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql-connector-java.version}</version> </dependency> </dependencies> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>${java.version}</source> <target>${java.version}</target> <encoding>UTF-8</encoding> <annotationProcessorPaths> <path> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>${lombok.version}</version> </path> </annotationProcessorPaths> </configuration> </plugin> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <!-- 指定該Main Class為全域性的唯一入口 --> <mainClass>FmemsApplication</mainClass> <fork>true</fork> </configuration> </plugin> </plugins> </pluginManagement> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <fork>true</fork> </configuration> </plugin> </plugins> </build> </project>
3、配置檔案application.yml。說明:mysql-connector-java引入的版本是高版本(8.0.13),需要加入時區“?serverTimezone=GMT",如果是”5“版本就不需要。
server:
port: 8090
spring:
datasource:
username: root
password: ******
url: jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT
driver-class-name: com.mysql.cj.jdbc.Driver
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.it.demo.domain.Empt
configuration:
map-underscore-to-camel-case: true
4、generatorConfig.xml內容:
<?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 執行上下文 --> <!-- id 必唯一 --> <!-- defaultModelType:可選;flat:所有內容(主鍵,blob)等全部生成在一個物件中 --> <!-- targetRuntime:可選 ;建議:MyBatis3Simple/MyBatis3 --> <context id="MySqlTables" defaultModelType="flat" targetRuntime="MyBatis3"> <!--beginningDelimiter和endingDelimiter:指明資料庫的用於標記資料庫物件名的符號 --> <!--如ORACLE就是雙引號;MYSQL預設是`反引號; --> <property name="beginningDelimiter" value="`" /> <property name="endingDelimiter" value="`" /> <!-- 指定生成的java檔案的編碼,沒有直接生成到專案時中文可能會亂碼 --> <property name="javaFileEncoding" value="UTF-8" /> <!-- 格式化java程式碼 --> <property name="javaFormatter" value="org.mybatis.generator.api.dom.DefaultJavaFormatter" /> <!-- 格式化XML程式碼 --> <property name="xmlFormatter" value="org.mybatis.generator.api.dom.DefaultXmlFormatter" /> <!--自動實現Serializable介面 --> <plugin type="org.mybatis.generator.plugins.SerializablePlugin" /> <!--去除生成的註釋;建議初次不去註釋 --> <commentGenerator> <!-- 去除自動生成時的時間戳 --> <property name="suppressDate" value="true" /> <!-- 去除自動生成的註釋 --> <property name="suppressAllComments" value="true" /> </commentGenerator> <!--資料庫基本資訊 --> <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT" userId="root" password="123456"> </jdbcConnection> <!-- java型別處理器 用於處理DB中的型別到Java中的型別,預設使用JavaTypeResolverDefaultImpl; --> <!-- 注意一點,預設會先嚐試使用Integer,Long,Short等來對應DECIMAL和 NUMERIC資料型別; --> <javaTypeResolver type="org.mybatis.generator.internal.types.JavaTypeResolverDefaultImpl"> <!-- true:使用BigDecimal對應DECIMAL和 NUMERIC資料型別 --> <!--false:預設, --> <!--scale>0;length>18:使用BigDecimal --> <!--scale=0;length[10,18]:使用Long --> <!--scale=0;length[5,9]:使用Integer --> <!--scale=0;length<5:使用Short --> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!--Java model(POJO)生成的位置 --> <!--targetPackage:包路徑 --> <!--targetProject:專案路徑 --> <javaModelGenerator targetPackage="com.it.demo.domain.generator" targetProject="src/main/java"> <!-- enableSubPackages:是否讓schema作為包的字尾 --> <property name="enableSubPackages" value="true" /> <!-- 從資料庫返回的值被清理前後的空格 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <!--*Mapper.xml生成的位置 --> <sqlMapGenerator targetPackage="mapper.generator" targetProject="src/main/resources"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <!-- 對於mybatis來說,即生成Mapper介面,注意,如果沒有配置該元素,那麼預設不會生成Mapper介面 --> <!--type:選擇怎麼生成mapper介面(在MyBatis3/MyBatis3Simple下) --> <!--1,ANNOTATEDMAPPER:會生成使用Mapper介面+Annotation的方式建立(SQL生成在annotation中),不會生成對應的XML --> <!--2,MIXEDMAPPER:使用混合配置,會生成Mapper介面,並適當新增合適的Annotation,但是XML會生成在XML中 --> <!--3,XMLMAPPER:會生成Mapper介面,介面完全依賴XML --> <!--注意,如果context是MyBatis3Simple:只支援ANNOTATEDMAPPER和XMLMAPPER --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.it.demo.dao.generator" targetProject="src/main/java"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!--表的名稱;對應類的名稱; --> <table tableName="tbl_employee" domainObjectName="Employee"></table> <table tableName="tbl_empt" domainObjectName="Department"></table> </context> </generatorConfiguration>
最後:如果要自動生產domain、xxxMapper.java、xxxMapper.xml。需要Run--->Run Configurations-->Maven 的Command Line 新增”mybatis-generator:generate” (mybatis-generator:generate -e 加了-e能輸出詳細)“。
執行後控制檯輸出如下:
效果如圖: