这篇文章主要介绍“springBoot集成mybatis转换为mybatis-plus怎么实现”,在日常操作中,相信很多人在springBoot集成mybatis转换为mybatis-plus怎么实现问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”springBoot集成mybatis转换为mybatis-plus怎么实现”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
<dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.4.2</version> </dependency>
#mybatis-plus mybatis-plus: mapperPackage: com.xn.mapper typeAliasesPackage: com.xn.mapper mapperLocations: classpath:mapper/*.xml global-config: db-config: id-type: none configuration: # 字段下划线转驼峰 map-underscore-to-camel-case: false log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
(用于扩展 分页/批量新增修改/更多的方法修改 基础可以不加)
model继承后可以 id自增会回填,更新时间在修改时刷新,创建时间在创建时刷新
import com.baomidou.mybatisplus.annotation.FieldFill; import com.baomidou.mybatisplus.annotation.IdType; import com.baomidou.mybatisplus.annotation.TableField; import com.baomidou.mybatisplus.annotation.TableId; import lombok.AllArgsConstructor; import lombok.Getter; import lombok.NoArgsConstructor; import lombok.Setter; import lombok.experimental.SuperBuilder; import java.io.Serializable; import java.util.Date; @Getter @Setter @SuperBuilder @NoArgsConstructor @AllArgsConstructor public abstract class BaseEntity implements Serializable { /** * 创建时间 自增方式 */ @TableField(fill = FieldFill.INSERT) public Date create_time; /** * 更新时间 */ @TableField(fill = FieldFill.INSERT_UPDATE) public Date update_time; /** * ID */ @TableId(value="id" ,type = IdType.AUTO) private Long id; }
设置刷新 更新时间 创建时间
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler; import org.apache.ibatis.reflection.MetaObject; import java.util.Date; /** * MP注入处理器 */ public class CreateAndUpdateMetaObjectHandler implements MetaObjectHandler { public String CREATE_TIME = "create_time"; public String UPDATE_TIME = "update_time"; @Override public void insertFill(MetaObject metaObject) { if (metaObject.hasGetter(CREATE_TIME)) { if (metaObject.getValue(CREATE_TIME) == null) { this.setFieldValByName(CREATE_TIME, new Date(), metaObject); } } } @Override public void updateFill(MetaObject metaObject) { if (metaObject.hasGetter(UPDATE_TIME)) { if (metaObject.getValue(UPDATE_TIME) == null) { this.setFieldValByName(UPDATE_TIME, new Date(), metaObject); } } } }
import com.baomidou.mybatisplus.core.mapper.BaseMapper; import java.util.List; /** * 自定义 Mapper 接口, 实现 自定义扩展 * */ public interface BaseMapperPlus<T> extends BaseMapper<T> { /** * 批量插入(mysql) * @param entityList * @return */ Integer insertBatchSomeColumn(List<T> entityList); /** * 批量更新(mysql) * @param entityList * @return */ Integer updateBatchSomeColumn(List<T> entityList); }
import com.baomidou.mybatisplus.core.injector.AbstractMethod; import com.baomidou.mybatisplus.core.injector.DefaultSqlInjector; import com.baomidou.mybatisplus.extension.injector.methods.InsertBatchSomeColumn; import java.util.List; /** * mybatis + sql注入器 */ public class MybatisPlusSqlInjector extends DefaultSqlInjector { @Override public List<AbstractMethod> getMethodList(Class<?> mapperClass) { List<AbstractMethod> methodList = super.getMethodList(mapperClass); // 添加InsertBatchSomeColumn方法 methodList.add(new InsertBatchSomeColumn()); methodList.add(new UpdateBatchSomeColumn()); return methodList; }
import com.baomidou.mybatisplus.core.injector.AbstractMethod; import com.baomidou.mybatisplus.core.metadata.TableInfo; import org.apache.ibatis.mapping.MappedStatement; import org.apache.ibatis.mapping.SqlSource; /** * 批处理更新一些列 * */ public class UpdateBatchSomeColumn extends AbstractMethod { @Override public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) { String sql = "<script>\n<foreach collection=\"list\" item=\"item\" separator=\";\">\nupdate %s %s where %s=#{%s} %s\n</foreach>\n</script>"; String additional = tableInfo.isWithVersion() ? tableInfo.getVersionFieldInfo().getVersionOli("item", "item.") : "" + tableInfo.getLogicDeleteSql(true, true); String setSql = sqlSet(tableInfo.isWithLogicDelete(), false, tableInfo, false, "item", "item."); String sqlResult = String.format(sql, tableInfo.getTableName(), setSql, tableInfo.getKeyColumn(), "item." + tableInfo.getKeyProperty(), additional); SqlSource sqlSource = languageDriver.createSqlSource(configuration, sqlResult, modelClass); return this.addUpdateMappedStatement(mapperClass, modelClass, "updateBatchSomeColumn", sqlSource); } }
import com.baomidou.mybatisplus.annotation.DbType; import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler; import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor; import com.baomidou.mybatisplus.extension.plugins.inner.OptimisticLockerInnerInterceptor; import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor; import org.mybatis.spring.annotation.MapperScan; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.transaction.annotation.EnableTransactionManagement; /** * mybatis-plus配置类 */ @EnableTransactionManagement(proxyTargetClass = true) @Configuration @MapperScan("${mybatis-plus.mapperPackage}") public class MybatisPlusConfig { @Bean public MybatisPlusInterceptor mybatisPlusInterceptor() { MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor(); // 分页插件 interceptor.addInnerInterceptor(paginationInnerInterceptor()); // 乐观锁插件 interceptor.addInnerInterceptor(optimisticLockerInnerInterceptor()); return interceptor; } /** * 分页插件,自动识别数据库类型 */ public PaginationInnerInterceptor paginationInnerInterceptor() { PaginationInnerInterceptor paginationInnerInterceptor = new PaginationInnerInterceptor(); // 设置数据库类型为mysql paginationInnerInterceptor.setDbType(DbType.MYSQL); // 设置最大单页限制数量,默认 500 条,-1 不受限制 paginationInnerInterceptor.setMaxLimit(-1L); return paginationInnerInterceptor; } /** * 乐观锁插件 */ public OptimisticLockerInnerInterceptor optimisticLockerInnerInterceptor() { return new OptimisticLockerInnerInterceptor(); } /** * 元对象字段填充控制器 */ @Bean public MetaObjectHandler metaObjectHandler() { return new CreateAndUpdateMetaObjectHandler(); } /** * sql注入器配置 */ @Bean public MybatisPlusSqlInjector easySqlInjector () { return new MybatisPlusSqlInjector(); } }
还有两个是分页与查询方式可以自己定义
分页类需要继承 IPage,查询类可以继承 IService
@Override public ServerResponse selectTableTestList(TableTestPOJO tableTest) { // 分页查询 1 sql自己写 适用于多表 Page<TableTest> page = new Page<>(mutualStep.getPageNum(), mutualStep.getPageSize()); page = tableTestMapper.findTableList(page,new TableTest()); // 分页查询 2 对象筛选 适用单表 条件默认相等 QueryWrapper<TableTest> query = Wrappers.query(); query.like("name","ls"); query.and( wrapper -> wrapper.notLike("name","1").or().like("name","ls") ); query.orderByDesc("id"); Page<TableTest> page = new Page<>(tableTest.getPageNum(), tableTest.getPageSize()); Page<TableTest> pageList = tableTestMapper.selectPage(page, query); return ServerResponse.createBySuccess(pageList); }
/** * 删除状态 0未删除,1删除 */ @TableLogic(value = "0",delval = "1") private Integer is_del;
@Override public ServerResponse deleteTableTest(MutualStepPage mutualStepPage, Integer... ids) { int number = tableTestMapper.deleteBatchIds(Arrays.asList(ids)); return ServerResponse.createBySuccess(number); }
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