/**
 * SQL 默認(rèn)注入器
 *
 * @author hubin
 * @since 2018-04-10
 */
public class DefaultSqlInjector extends AbstractSqlInjector {
    @Override
    public List<AbstractMethod> getMethodList() {
        return Stream.of(
            new Insert(),
            new Delete(),
            new DeleteByMap(),
            new DeleteById(),
            new DeleteBatchByIds(),
            new Update(),
            new UpdateById(),
            new SelectById(),
            new SelectBatchByIds(),
            new SelectByMap(),
            new SelectOne(),
            new SelectCount(),
            new SelectMaps(),
            new SelectMapsPage(),
            new SelectObjs(),
            new SelectList(),
            new SelectPage()
        ).collect(toList());
    }
}

/**
 * @Auther: IT賤男
 * @Date: 2019/9/23 16:14
 * @Description: 通用刪除全部方法
 */
public class DeleteAllMethod extends AbstractMethod {
    @Override
    public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
        // 自定義sql tableInfo.getTableName() 獲取表名
        String sql = "delete from " + tableInfo.getTableName();
        // mapper 接口方法名
        String method = "deleteAll";
        SqlSource sqlSource = languageDriver.createSqlSource(configuration, sql, modelClass);
        return addDeleteMappedStatement(mapperClass, method, sqlSource);
    }
}

/**
 * @Auther: IT賤男
 * @Date: 2019/9/23 16:22
 * @Description: 將自定義方法的類添加到注入器
 */
@Component
public class MySqlInjector extends DefaultSqlInjector {
    @Override
    public List<AbstractMethod> getMethodList() {
        // 這里很重要，先要通過父類方法，獲取到原有的集合，不然會自帶的通用方法會失效的
        List<AbstractMethod> methodList = super.getMethodList();
        // 添加自定義方法類
        methodList.add(new DeleteAllMethod());
        return methodList;
    }
}

/**
 * @Auther: IT賤男
 * @Date: 2019/9/23 16:35
 * @Description: 自定義通用Mapper方法
 */
public interface MyMapper<T> extends BaseMapper<T> {
    /**
     * 自定義通用方法
     * @return
     */
    int deleteAll();
}
/**
 * <p>
 * 用戶 Mapper 接口
 * </p>
 *
 * @author IT賤男
 * @since 2019-06-14
 */
public interface UserMapper extends MyMapper<User> {
    /**
     * 自定Wrapper修改
     *
     * @param userWrapper 條件構(gòu)造器
     * @param user        修改的對象參數(shù)
     * @return
     */
    @SqlParser(filter = true)
    int updateByMyWrapper(@Param(Constants.WRAPPER) Wrapper<User> userWrapper, @Param("user") User user);
}

   @Test
    public void delete() {
        int i = userMapper.deleteAll();
        System.out.println(i);
    }