1.MyBatis与SpringBoot整合
1.1.新建模块spboot03
详细请看: https://blog.csdn.net/qq_50477101/article/details/132156365 的2.1创建项目
1.2.在pom.xml添加mysql驱动
<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.29</version> </dependency>
1.3.application.yml中添加内容
mybatis: mapper-locations: classpath:mappers/**/*.xml type-aliases-package: com.zjzaki.spboot03.entity server: port: 8080 spring: application: name: spboot03 datasource: driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/crm?useUnicode=true&characterEncoding=UTF-8 username: root password: 123456 logging: level: com.zjzaki.spboot03: debug
1.4.代码生成插件
1.4.1.resources添加jdbc.properties
jdbc.driver=com.mysql.cj.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/crm?useUnicode=true&characterEncoding=UTF-8 jdbc.username=root jdbc.password=123456
1.4.2.resources中添加generatorConfig.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" > <generatorConfiguration> <!-- 引入配置文件 --> <properties resource="jdbc.properties"/> <!--指定数据库jdbc驱动jar包的位置--> <!-- <classPathEntry location="D:\\SoftwareInstallPath\\repository\\mvn_repository\\mysql\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/>--> <!-- 一个数据库一个context --> <context id="infoGuardian"> <!-- 注释 --> <commentGenerator> <property name="suppressAllComments" value="true"/><!-- 是否取消注释 --> <property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 --> </commentGenerator> <!-- jdbc连接 --> <jdbcConnection driverClass="${jdbc.driver}" connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/> <!-- 类型转换 --> <javaTypeResolver> <!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） --> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!-- 01 指定javaBean生成的位置 --> <!-- targetPackage：指定生成的model生成所在的包名 --> <!-- targetProject：指定在该项目下所在的路径 --> <javaModelGenerator targetPackage="com.zjzaki.spboot03.model" targetProject="src/main/java"> <!-- 是否允许子包，即targetPackage.schemaName.tableName --> <property name="enableSubPackages" value="false"/> <!-- 是否对model添加构造函数 --> <property name="constructorBased" value="true"/> <!-- 是否针对string类型的字段在set的时候进行trim调用 --> <property name="trimStrings" value="false"/> <!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法，只有构造方法 --> <property name="immutable" value="false"/> </javaModelGenerator> <!-- 02 指定sql映射文件生成的位置 --> <sqlMapGenerator targetPackage="com.zjzaki.spboot03.mapper" targetProject="src/main/resources/mappers"> <!-- 是否允许子包，即targetPackage.schemaName.tableName --> <property name="enableSubPackages" value="false"/> </sqlMapGenerator> <!-- 03 生成XxxMapper接口 --> <!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 --> <!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 --> <!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 --> <javaClientGenerator targetPackage="com.zjzaki.spboot03.mapper" targetProject="src/main/java" type="XMLMAPPER"> <!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] --> <property name="enableSubPackages" value="false"/> </javaClientGenerator> <!-- 配置表信息 --> <!-- schema即为数据库名 --> <!-- tableName为对应的数据库表 --> <!-- domainObjectName是要生成的实体类 --> <!-- enable*ByExample是否生成 example类 --> <!--<table schema="" tableName="t_book" domainObjectName="Book"--> <!--enableCountByExample="false" enableDeleteByExample="false"--> <!--enableSelectByExample="false" enableUpdateByExample="false">--> <!--<!– 忽略列，不生成bean 字段 –>--> <!--<!– <ignoreColumn column="FRED" /> –>--> <!--<!– 指定列的java数据类型 –>--> <!--<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>--> <!--</table>--> <table schema="" tableName="customer" domainObjectName="Customer" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"> </table> </context> </generatorConfiguration>
1.4.3.pom.xml中添加插件
<plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <dependencies> <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.29</version> </dependency> </dependencies> <configuration> <overwrite>true</overwrite> </configuration> </plugin>
1.4.4.点击生成代码
1.4.5.新建一个controller包,添加JdbcController
package com.zjzaki.spboot03.controller; import com.zjzaki.spboot03.mapper.CustomerMapper; import com.zjzaki.spboot03.model.Customer; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; /** * @Author zjzaki * @Package com.zjzaki.spboot03.controller * @Date 2023-08-08 18:56:34 */ @RestController @RequestMapping("/jdbc") public class JdbcController { @Autowired public CustomerMapper customerMapper; @GetMapping("/get") public Customer list(Integer cid) { return customerMapper.selectByPrimaryKey(cid); } @DeleteMapping("/delete") public int delete(Integer cid) { return customerMapper.deleteByPrimaryKey(cid); } @PostMapping("/add") public int add(Customer customer) { return customerMapper.insertSelective(customer); } }
1.4.6.修改启动类的内容
package com.zjzaki.spboot03; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @MapperScan("com.zjzaki.spboot03.mapper") @SpringBootApplication public class Spboot03Application { public static void main(String[] args) { SpringApplication.run(Spboot03Application.class, args); } }
1.4.7.启动项目,使用Eolink测试
2.MyBatis-Plus与SpringBoot整合
2.1.官网
2.2.新建模块spboot03-mp
2.3.pom.xml中添加依赖
<dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.2</version> </dependency> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-generator</artifactId> <version>3.4.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.29</version> </dependency> <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.31</version> </dependency>
2.4.application.yml中添加内容
server: port: 8080 spring: application: name: spboot03-mp datasource: driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/crm?useUnicode=true&characterEncoding=UTF-8 username: root password: 123456 logging: level: com.zjzaki.demo: debug mybatis-plus: mapper-locations: classpath:mappers/**/*.xml type-aliases-package: com.zjzaki.spboot03mp.model
2.5.MyBatis-Plus代码生成类
package com.zjzaki.spboot03mp; import com.baomidou.mybatisplus.annotation.DbType; import com.baomidou.mybatisplus.annotation.IdType; import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException; import com.baomidou.mybatisplus.core.toolkit.StringPool; import com.baomidou.mybatisplus.core.toolkit.StringUtils; import com.baomidou.mybatisplus.generator.AutoGenerator; import com.baomidou.mybatisplus.generator.InjectionConfig; import com.baomidou.mybatisplus.generator.config.*; import com.baomidou.mybatisplus.generator.config.po.TableInfo; import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy; import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine; import java.util.ArrayList; import java.util.List; import java.util.Scanner; /** * mybatis-plus代码生成 */ public class MPGenerator { /** * <p> * 读取控制台内容 * </p> */ public static String scanner(String tip) { Scanner scanner = new Scanner(System.in); StringBuilder help = new StringBuilder(); help.append("请输入" + tip); System.out.println(help.toString()); if (scanner.hasNext()) { String ipt = scanner.next(); if (StringUtils.isNotBlank(ipt)) { if ("quit".equals(ipt)) return ""; return ipt; } } throw new MybatisPlusException("请输入正确的" + tip + "！"); } public static void main(String[] args) { // 代码生成器 AutoGenerator mpg = new AutoGenerator(); // 1.全局配置 GlobalConfig gc = new GlobalConfig(); String projectPath = System.getProperty("user.dir") + "/spboot03-mp"; System.out.println(projectPath); gc.setOutputDir(projectPath + "/src/main/java"); gc.setOpen(false); gc.setBaseResultMap(true);//生成BaseResultMap gc.setActiveRecord(false);// 不需要ActiveRecord特性的请改为false gc.setEnableCache(false);// XML 二级缓存 gc.setBaseResultMap(true);// XML ResultMap gc.setBaseColumnList(true);// XML columList //gc.setSwagger2(true); //实体属性 Swagger2 注解 gc.setAuthor("lky"); // 自定义文件命名，注意 %s 会自动填充表实体属性！ gc.setMapperName("%sMapper"); gc.setXmlName("%sMapper"); gc.setServiceName("%sService"); gc.setServiceImplName("%sServiceImpl"); gc.setControllerName("%sController"); gc.setIdType(IdType.AUTO); mpg.setGlobalConfig(gc); // 2.数据源配置 DataSourceConfig dsc = new DataSourceConfig(); dsc.setDbType(DbType.MYSQL); dsc.setUrl("jdbc:mysql://localhost:3306/crm?useUnicode=true&characterEncoding=UTF-8"); dsc.setDriverName("com.mysql.cj.jdbc.Driver"); dsc.setUsername("root"); dsc.setPassword("123456"); mpg.setDataSource(dsc); // 3.包配置 PackageConfig pc = new PackageConfig(); String moduleName = scanner("模块名(quit退出，表示没有模块名)"); if (StringUtils.isNotBlank(moduleName)) { pc.setModuleName(moduleName); } pc.setParent("com.zjzaki.spboot03mp") .setMapper("mapper") .setService("service") .setController("controller") .setEntity("model"); mpg.setPackageInfo(pc); // 4.自定义配置 InjectionConfig cfg = new InjectionConfig() { @Override public void initMap() { // to do nothing } }; // 如果模板引擎是 freemarker String templatePath = "/templates/mapper.xml.ftl"; // 自定义输出配置 List<FileOutConfig> focList = new ArrayList<>(); // 自定义配置会被优先输出 focList.add(new FileOutConfig(templatePath) { @Override public String outputFile(TableInfo tableInfo) { // 自定义输出文件名 ， 如果你 Entity 设置了前后缀、此处注意 xml 的名称会跟着发生变化！！ if (StringUtils.isNotBlank(pc.getModuleName())) { return projectPath + "/src/main/resources/mappers/" + pc.getModuleName() + "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML; } else { return projectPath + "/src/main/resources/mappers/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML; } } }); cfg.setFileOutConfigList(focList); mpg.setCfg(cfg); // 配置模板 TemplateConfig templateConfig = new TemplateConfig(); templateConfig.setXml(null); mpg.setTemplate(templateConfig); // 5.策略配置 StrategyConfig strategy = new StrategyConfig(); // 表名生成策略(下划线转驼峰命名) strategy.setNaming(NamingStrategy.underline_to_camel); // 列名生成策略(下划线转驼峰命名) strategy.setColumnNaming(NamingStrategy.underline_to_camel); // 是否启动Lombok配置 strategy.setEntityLombokModel(true); // 是否启动REST风格配置 strategy.setRestControllerStyle(true); // 自定义实体父类strategy.setSuperEntityClass("com.baomidou.mybatisplus.extension.activerecord.Model"); // 自定义service父接口strategy.setSuperServiceClass("com.baomidou.mybatisplus.extension.service.IService"); // 自定义service实现类strategy.setSuperServiceImplClass("com.baomidou.mybatisplus.extension.service.impl.ServiceImpl"); // 自定义mapper接口strategy.setSuperMapperClass("com.baomidou.mybatisplus.core.mapper.BaseMapper"); strategy.setSuperEntityColumns("id"); // 写于父类中的公共字段plus strategy.setSuperEntityColumns("id"); strategy.setInclude(scanner("表名，多个英文逗号分割").split(",")); strategy.setControllerMappingHyphenStyle(true); //表名前缀(可变参数)：“t_”或”“t_模块名”，例如：t_user或t_sys_user strategy.setTablePrefix("t_", "t_sys_"); //strategy.setTablePrefix(scanner("请输入表前缀")); mpg.setStrategy(strategy); mpg.setTemplateEngine(new FreemarkerTemplateEngine()); // 执行 mpg.execute(); } }
2.6.UserController添加内容
package com.zjzaki.spboot03mp.controller; import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.zjzaki.spboot03mp.model.User; import com.zjzaki.spboot03mp.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import java.util.HashMap; import java.util.List; import java.util.Map; /** * <p> * 前端控制器 * </p> * * @author lky * @since 2023-08-08 */ @RestController @RequestMapping("/user") public class UserController { @Autowired private UserService userService; /** * 查询所有 */ @GetMapping("/list") public List<User> list(){ return userService.list(); } /** * 按条件查询 */ @GetMapping("/ListByCondition") public List<User> ListByCondition(User user){ QueryWrapper w = new QueryWrapper(); w.like("userName",user.getUserName()); return userService.list(w); } /** * 查询单个 * @param book * @return */ @GetMapping("/load") public User load(User user){ QueryWrapper w = new QueryWrapper(); w.like("id",user.getId()); return userService.getOne(w); } /** * 增加 * @param user * @return */ @PutMapping("/add") public boolean add(User user){ boolean save = userService.save(user); return save; } /** * 修改 * @param book * @return */ @PostMapping("/update") public boolean update(User book){ boolean save = userService.saveOrUpdate(book); return save; } /** * 删除 * @param user * @return */ @DeleteMapping("/delete") public boolean delete(User user){ boolean save = userService.removeById(user.getId()); return save; } }
2.7.修改启动类中的内容
package com.zjzaki.spboot03mp; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @MapperScan("com.zjzaki.spboot03mp.mapper") @SpringBootApplication public class Spboot03MpApplication { public static void main(String[] args) { SpringApplication.run(Spboot03MpApplication.class, args); } }
2.8.使用Eolink测试
2.9.MyBatis-Plus联表查询
2.9.1.UserService中添加内容
/** * 查询用户角色 * @param map map集合 * @return 查询到的列表集合 */ List<Map> queryUserRole(Map map);
2.9.2.UserServiceImpl添加添加
@Autowired private UserMapper userMapper; /** * 查询用户角色 * * @param map map集合 * @return 查询到的列表集合 */ @Override public List<Map> queryUserRole(Map map) { return userMapper.queryUserRole(map); }
2.9.3.UserMapper中添加内容
/** * 查询用户角色 * * @param map map集合 * @return 查询到的列表集合 */ List<Map> queryUserRole(Map map);
2.9.4.UserMapper.xml中添加内容
<select id="queryUserRole" resultType="java.util.Map"> SELECT tu.*, tr.role_name FROM `t_user` as tu INNER JOIN `t_role` as tr on tu.roleId = tr.id </select>
2.9.5.UserController中添加内容
// 连表查询 @GetMapping("/userRole") public List<Map> userRole(String userName){ Map map = new HashMap(); map.put("user_name",userName); List<Map> maps = userService.queryUserRole(map); return maps; }
2.9.6.使用Eolink测试
可以看到此处的查询多了角色,联表查询是成功的
