做招聘网站价格,龙之向导免费网站,网站建设哪家好灵活苏州久远网络,上首页的seo关键词优化对 “mybatis - XxxMapper.java接口中方法的参数 和 返回值类型#xff0c;怎样在 XxxMapper.xml 中配置的问题” 这篇文章做一下优化
这个pom.xml文件#xff0c;就是上面说的这篇文章的父工程的pom.xml#xff0c;即#xff1a;下面这个pom.xml 是可以拿来就用的 ?…对 “mybatis - XxxMapper.java接口中方法的参数 和 返回值类型怎样在 XxxMapper.xml 中配置的问题” 这篇文章做一下优化
这个pom.xml文件就是上面说的这篇文章的父工程的pom.xml即下面这个pom.xml 是可以拿来就用的 ?xml version1.0 encodingUTF-8?
project xmlnshttp://maven.apache.org/POM/4.0.0xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersiongroupIdcom.atguigu/groupIdartifactIdssm-mybatis-parts/artifactIdversion1.0-SNAPSHOT/versionpackagingpom/packagingmodulesmodulemybatis-base-quick/modulemodulemybatis-base-param-input/modulemodulemybatis-base-result-output/modulemodulemybatis-base-crud/module/modulespropertiesmaven.compiler.source17/maven.compiler.sourcemaven.compiler.target17/maven.compiler.targetproject.build.sourceEncodingUTF-8/project.build.sourceEncoding/propertiesdependencies!-- mybatis依赖 --dependencygroupIdorg.mybatis/groupIdartifactIdmybatis/artifactIdversion3.5.11/version/dependency!-- mysql驱动mybatis底层依赖jdbc驱动实现本次不需要导入连接池mybatis自带 --dependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdversion8.0.25/version/dependency!-- junit5测试 --dependencygroupIdorg.junit.jupiter/groupIdartifactIdjunit-jupiter-api/artifactIdversion5.3.1/version/dependency* 主要说说这个 lombok配合lombok插件一起使用可以使用注解Data给实体类自动添加setter、getter、toString方法dependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactIdversion1.18.28/version/dependency/dependencies/project
上面说的lombokmaven依赖要与这个插件一起使用才可以哦 再说一下 测试文件src/test/java/com.atguigu.MybatisTest.java
主要是 BeforeEach、AfterEach 这两个注解 package com.atguigu.test;import com.atguigu.mapper.UserMapper;
import com.atguigu.pojo.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;import javax.imageio.ImageReader;
import java.io.IOException;
import java.io.InputStream;public class MybatisTest {private SqlSession sqlSession;BeforeEach // 每次走测试方法之前先走此初始化方法public void before() throws IOException {InputStream resourceAsStream Resources.getResourceAsStream(mybatis-config.xml);SqlSessionFactory sqlSessionFactory new SqlSessionFactoryBuilder().build(resourceAsStream);sqlSession sqlSessionFactory.openSession(true); // 开启自动提交}AfterEach // 每次走测试方法之后都会调用此方法public void after(){sqlSession.close();}Testpublic void testInsert() {UserMapper mapper sqlSession.getMapper(UserMapper.class);User user new User();user.setUsername(root);user.setPassword(123456);int insert mapper.insert(user);System.out.println(insert insert);}Testpublic void testUpdate() {UserMapper mapper sqlSession.getMapper(UserMapper.class);User user new User();user.setId(1);user.setUsername(root2);user.setPassword(1234562);int update mapper.update(user);System.out.println(update update);}Testpublic void testDelete() {UserMapper mapper sqlSession.getMapper(UserMapper.class);int delete mapper.delete(1);System.out.println(delete delete);}Testpublic void testSelectById() {}Testpublic void testSelectAll() {}
} 还有 Data 注解
src/main/java/com.atguigu.pojo/User.java package com.atguigu.pojo;import lombok.Data;Data
这个注解可以给实体类自动添加getter、setter、toString方法
public class User {private Integer id;private String username;private String password;
}
