qq_30245525的博客

Spring入门案例1.导入spring坐标<dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.1.9.RELEASE</version></dependency>2.编写service层接口与实现类接口public

多表联查一方有多方的属性，多方有一方的集合//多方public class Bills {private Integer id;private String title;private Date billtime;private Integer typeid;private Double price;private String explains;private BillType billType;}//一方public class BillType {private

依赖包<dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.5</version></dependency>加载插件<build> <plugins> <plugin>

Maven驱动包<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <!--11是JDK版本--> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compile