springboot整合mybatis筆記
阿新 • • 發佈:2018-10-17
文章 password 創建 mysql\ 文件中 註釋 r.java pom.xml ffi
1首先創建一個springboot項目
創建項目的文件結構以及jdk的版本
選擇項目所需要的依賴
之後點擊finish,完成創建
2以下是文件結構
看一下啊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-mybatis</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>demo-mybatis</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-jdbc</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>1.3.2</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</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 自動生成代碼插件 --> <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> </build> </project>
3項目不使用application.properties文件 而使用更加簡潔的application.yml文件:
將原有的resource文件夾下的application.properties文件刪除,創建一個新的application.yml配置文件,
文件的內容如下:
server:
port: 8080
spring:
datasource:
name: test
url: jdbc:mysql://127.0.0.1:3306/test
username: root
password: 123456
mvc:
view:
prefix: /
suffix: .html
4接下去在數據庫裏建立一張簡單的表作為實驗,這裏就不寫建表的操作了。
5使用mybatis generator 自動生成代碼:
配置pom.xml中generator 插件所對應的配置文件 ${basedir}/src/main/resources/generator/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> <!-- 數據庫驅動:選擇你的本地硬盤上面的數據庫驅動包--> <classPathEntry location="D:\maven_Repository\mysql\mysql-connector-java\5.1.34"/> <context id="DB2Tables" targetRuntime="MyBatis3"> <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> <!--數據庫鏈接URL,用戶名、密碼 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1/test" userId="root" password="212517"> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!-- 生成模型的包名和位置--> <javaModelGenerator targetPackage="com.example.demomybatis.model" targetProject="src/main/java"> <property name="enableSubPackages" value="true"/> <property name="trimStrings" value="true"/> </javaModelGenerator> <!--生成映射文件的包名和位置--> <sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources"> <property name="enableSubPackages" value="true"/> </sqlMapGenerator> <!-- 生成DAO的包名和位置--> <javaClientGenerator type="XMLMAPPER" targetPackage="com.example.demomybatis.mapper" targetProject="src/main/java"> <property name="enableSubPackages" value="true"/> </javaClientGenerator> <!-- 要生成的表 tableName是數據庫中的表名或視圖名 domainObjectName是實體類名--> <table tableName="stu_info" domainObjectName="User" enableCountByExample="true" enableUpdateByExample="true" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> </context> </generatorConfiguration>
點擊run-Edit Configurations
添加配置
運行(註意!!!同一張表一定不要運行多次,因為mapper的映射文件中會生成多次的代碼,導致報錯,切記)
最後生成的文件以及結構
6打開類DemoMybatisApplication.java,這個是springboot的啟動類。我們需要添加點東西:
7最後寫好controller,service層代碼就可以測試了
UserController.java
UserService.java
UserServiceImpl.java
package com.example.demomybatis.service.impl; import com.example.demomybatis.mapper.UserMapper; import com.example.demomybatis.model.User; import com.example.demomybatis.service.UserService; import java.util.List; public class UserServiceImpl implements UserService { private UserMapper userMapper; @Override public List<User> selectAll() { return userMapper.selectAll(); } }
之後就可以運行測試了。
參考文章:https://blog.csdn.net/winter_chen001/article/details/77249029#commentBox
springboot整合mybatis筆記