LuSHui_1997的博客

实体类：Stu.java public class Stu implements Serializable { private Integer id; private String name; private Integer age; private Double score; private Address address_id; } 实体类：addre...

使用where标签和if标签进行控制查询条件： <select id="findByCondition" resultType="address" parameterType="address"> select * from address <where> <if test="des!=null">...

数据库版本：MySQL8.0.19 目录结构： pom.xml文件： <?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" ...