MyBatis環境資源配置
阿新 • • 發佈:2020-07-23
mybatis配置
1. pom.xml檔案配置
<?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"> <modelVersion>4.0.0</modelVersion> <groupId>groupId</groupId> <artifactId>MyBatis_01</artifactId> <packaging>pom</packaging> <version>1.0-SNAPSHOT</version> <!--匯入相關依賴--> <dependencies> <!--匯入MyBatis相關jar包--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <!--匯入junit測試jar包--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!--匯入連線mysql資料庫驅動包--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <!--匯入MyBatis日誌jar包--> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> </dependencies> <!-- 解決Maven靜態資源過濾問題 --> <build> <resources> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> </resources> <!-- 解決版本問題 --> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>9</source> <target>9</target> </configuration> </plugin> </plugins> </build> </project>
2. MyBatis核心配置檔案(如mybatis-config.xml)
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!--匯入properties 配置檔案--> <properties resource="db.properties"/> <settings> <setting name="logImpl" value="STDOUT_LOGGING"/> </settings> <environments default="development"> <!--環境配置預設是development,可修改--> <environment id="development"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="${driver}"/> <property name="url" value="${url}"/> <property name="username" value="${username}"/> <property name="password" value="${password}"/> </dataSource> </environment> </environments> <!--Mybatis的mapper註冊,定義 SQL 對映語句--> <mappers> <mapper resource="com/lf/dao/UserMapper.xml"/> </mappers> </configuration>
- Properties優化 :可在資源目錄下新建一個db.properties 檔案。如:
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8
username=root
password=123456
3. Mapper.xml配置檔案
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <!--namespace 十分重要,不能寫錯--> <mapper namespace="com.lf.dao.UserMapper"> <!--下面寫增刪改查語句,--> <select id="getUserList" resultType="com.lf.pojo.User"> select * from mybatis.user </mapper>