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student实体类： import lombok.Data; @Data public class Student { private int id; private String name; private String tid; } teacher实体类： import lombok.Data; import java.util.List; @Data public class Teacher { private int id; private Strin

1、UserMapper.java List<User> getUserByLimit(Map<String, Integer> map); 2、Usermapper.xml <select id="getUserByLimit" parameterType="map" resultType="com.wjj.pojo.User"> select * from mybatis.user limit #{startIndex}, #{pageSize} </

1、 导包： <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> 2、在配置文件目录下新建一个log4j.properties，内容如下： #将等级为DEBUG的日志信息输出到console和file这两个目的地，conso

1、配置pom文件，导入jar包 <!-- 导入驱动 --> <dependencies> <!-- mysql驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <v

public class JdbcTest3 { public static void main(String[] args) { String url = "jdbc:mysql://47.105.167.226:3306/jdbc?useUnicode=true&characterEncoding=utf-8"; String username = "root"; String password = "Wjj811971...";

1、Statement public class JdbcTest { public static void main(String[] args) throws Exception { String url = "jdbc:mysql://ip:3306/jdbc?useUnicode=true&characterEncoding=utf-8"; String username = "root"; String password = "密码"

public class JdbcTest { public static void main(String[] args) throws Exception { String url = "jdbc:mysql://47.105.167.226:3306/jdbc?useUnicode=true&characterEncoding=utf-8"; String username = "root"; String password = "Wjj