Mybatis-Plus 搭建与使用入门(小结)

  <dependency>   <groupId>com.baomidou</groupId>   <artifactId>mybatis-plus-boot-starter</artifactId>   <version>2.3</version>  </dependency>  <!-- velocity 依赖，用于代码生成 -->  <dependency>   <groupId>org.apache.velocity</groupId>   <artifactId>velocity-engine-core</artifactId>   <version>2.0</version>  </dependency>

mybatis-plus.mapper-locations=classpath:/mapper/*Mapper.xmlmybatis-plus.typeAliasesPackage=com.taven.web.springbootmp.entitymybatis-plus.global-config.id-type=3mybatis-plus.global-config.field-strategy=2mybatis-plus.global-config.db-column-underline=truemybatis-plus.global-config.key-generator=com.baomidou.mybatisplus.incrementer.OracleKeyGeneratormybatis-plus.global-config.logic-delete-value=1mybatis-plus.global-config.logic-not-delete-value=0mybatis-plus.global-config.sql-injector=com.baomidou.mybatisplus.mapper.LogicSqlInjector#这里需要改成你的类mybatis-plus.global-config.meta-object-handler=com.taven.web.springbootmp.MyMetaObjectHandlermybatis-plus.configuration.map-underscore-to-camel-case=truemybatis-plus.configuration.cache-enabled=falsemybatis-plus.configuration.jdbc-type-for-null=null

import org.mybatis.spring.annotation.MapperScan;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import com.baomidou.mybatisplus.incrementer.H2KeyGenerator;import com.baomidou.mybatisplus.incrementer.IKeyGenerator;import com.baomidou.mybatisplus.mapper.ISqlInjector;import com.baomidou.mybatisplus.mapper.LogicSqlInjector;import com.baomidou.mybatisplus.mapper.MetaObjectHandler;import com.baomidou.mybatisplus.plugins.PaginationInterceptor;import com.baomidou.mybatisplus.plugins.PerformanceInterceptor;import com.taven.web.springbootmp.MyMetaObjectHandler;@EnableTransactionManagement@Configuration@MapperScan("com.taven.web.springbootmp.mapper")public class MybatisPlusConfig { /**  * mybatis-plus SQL执行效率插件【生产环境可以关闭】  */ @Bean public PerformanceInterceptor performanceInterceptor() {  return new PerformanceInterceptor(); } /*  * 分页插件，自动识别数据库类型 多租户，请参考官网【插件扩展】  */ @Bean public PaginationInterceptor paginationInterceptor() {  return new PaginationInterceptor(); } @Bean public MetaObjectHandler metaObjectHandler() {  return new MyMetaObjectHandler(); } /**  * 注入主键生成器  */ @Bean public IKeyGenerator keyGenerator() {  return new H2KeyGenerator(); } /**  * 注入sql注入器  */ @Bean public ISqlInjector sqlInjector() {  return new LogicSqlInjector(); }}

import com.baomidou.mybatisplus.mapper.MetaObjectHandler;import org.apache.ibatis.reflection.MetaObject;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * 注入公共字段自动填充,任选注入方式即可 *///@Componentpublic class MyMetaObjectHandler extends MetaObjectHandler { protected final static Logger logger = LoggerFactory.getLogger(Application.class); @Override public void insertFill(MetaObject metaObject) {  logger.info("新增的时候干点不可描述的事情"); } @Override public void updateFill(MetaObject metaObject) {  logger.info("更新的时候干点不可描述的事情"); }}

import org.junit.Test;import com.baomidou.mybatisplus.generator.AutoGenerator;import com.baomidou.mybatisplus.generator.config.DataSourceConfig;import com.baomidou.mybatisplus.generator.config.GlobalConfig;import com.baomidou.mybatisplus.generator.config.PackageConfig;import com.baomidou.mybatisplus.generator.config.StrategyConfig;import com.baomidou.mybatisplus.generator.config.rules.DbType;import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;/** * <p> * 测试生成代码 * </p> * * @author K神 * @date 2017/12/18 */public class GeneratorServiceEntity { @Test public void generateCode() {  String packageName = "com.taven.web.springbootmp";  boolean serviceNameStartWithI = false;//user -> UserService, 设置成true: user -> IUserService  generateByTables(serviceNameStartWithI, packageName, "cable", "station");//修改为你的表名 } private void generateByTables(boolean serviceNameStartWithI, String packageName, String... tableNames) {  GlobalConfig config = new GlobalConfig();  String dbUrl = "jdbc:mysql://localhost:3306/communicate";  DataSourceConfig dataSourceConfig = new DataSourceConfig();  dataSourceConfig.setDbType(DbType.MYSQL)    .setUrl(dbUrl)    .setUsername("root")    .setPassword("root")    .setDriverName("com.mysql.jdbc.Driver");  StrategyConfig strategyConfig = new StrategyConfig();  strategyConfig    .setCapitalMode(true)    .setEntityLombokModel(false)    .setDbColumnUnderline(true)    .setNaming(NamingStrategy.underline_to_camel)    .setInclude(tableNames);//修改替换成你需要的表名，多个表名传数组  config.setActiveRecord(false)    .setEnableCache(false)    .setAuthor("殷天文")    .setOutputDir("E://dev//stsdev//spring-boot-mp//src//main//java")    .setFileOverride(true);  if (!serviceNameStartWithI) {   config.setServiceName("%sService");  }  new AutoGenerator().setGlobalConfig(config)    .setDataSource(dataSourceConfig)    .setStrategy(strategyConfig)    .setPackageInfo(      new PackageConfig()        .setParent(packageName)        .setController("controller")        .setEntity("entity")    ).execute(); }// private void generateByTables(String packageName, String... tableNames) {//  generateByTables(true, packageName, tableNames);// }}

/** * <p> * 前端控制器 * </p> * * @author 殷天文 * @since 2018-05-31 */@Controller@RequestMapping("/cable")public class CableController {  @Autowired private CableService cableService;  /**  * list 查询测试  *   */ @RequestMapping("/1") @ResponseBody public Object test1() {  // 构造实体对应的 EntityWrapper 对象，进行过滤查询  EntityWrapper<Cable> ew = new EntityWrapper<>();  ew.where("type={0}", 1)    .like("name", "王")    .and("core_number={0}", 24)    .and("is_delete=0");  List<Cable> list = cableService.selectList(ew);  List<Map<String, Object>> maps = cableService.selectMaps(ew);  System.out.println(list);  System.out.println(maps);  return "ok"; }  /**  * 分页 查询测试  */ @RequestMapping("/2") @ResponseBody public Object test2() {  // 构造实体对应的 EntityWrapper 对象，进行过滤查询  EntityWrapper<Cable> ew = new EntityWrapper<>();  ew.where("type={0}", 1)//    .like("name", "王")    .and("core_number={0}", 24)    .and("is_delete=0");  Page<Cable> page = new Page<>(1,10);  Page<Cable> pageRst = cableService.selectPage(page, ew);  return pageRst; }  /**  * 自定义查询字段  */ @RequestMapping("/3") @ResponseBody public Object test3() {  Object vl = null;  // 构造实体对应的 EntityWrapper 对象，进行过滤查询  EntityWrapper<Cable> ew = new EntityWrapper<>();  ew.setSqlSelect("id, `name`, "    + "case type/n" +     "when 1 then '220kv'/n" +     "end typeName")    .where("type={0}", 1)//    .like("name", "王")    .where(false, "voltage_level=#{0}", vl);//当vl 为空时，不拼接  Page<Cable> page = new Page<>(1,10);  Page<Cable> pageRst = cableService.selectPage(page, ew);  return pageRst; }  /**  * insert  */ @RequestMapping("/4") @ResponseBody public Object test4() {  Cable c = new Cable();  c.setName("测试光缆");  cableService.insert(c);  return "ok"; }  /**  * update  */ @RequestMapping("/5") @ResponseBody public Object test5() {  Cable c = cableService.selectById(22284l);  c.setName("测试光缆2222");  c.setType(1);  cableService.updateById(c);  return "ok"; } }