mapper一对多简单写法笔记

分表存储，并且查询数据

    
        
        
        
        
        
        
        
            
            
            
            
            
            
        
    

    
    
        SELECT
        `div_optings_conten`.`num`,
        `div_optings_conten`.`content`,
        `div_optings_conten`.`open_index`,
        `div_optings_conten`.`strength_index`,
        `div_optings_conten`.`title_number`,
        `div_optings_title`.`title_ describe`,
        `div_optings_title`.`title_name`,
        `div_optings_title`.`title_num`,
        `div_optings_title`.`title_type`,
        `div_optings_title`.`titlt_mark`
        from
        `div_optings_conten`
        LEFT JOIN `div_optings_title`
        ON `div_optings_title`.`title_num` = `div_optings_conten`.`title_number`
    

实体

public class DivOptingsConten implements Serializable {
    private Integer num;

    private String content;

    private String options;

    private String strengthIndex;

    private String openIndex;

    private Integer titleNumber;

    List divOptingsTitles;

标题：

public class DivOptingsTitle implements Serializable {
    private Integer id;

    private String titleName;

    private String titleType;

    private String titleDescribe;

    private Integer titleNum;

    private String titltMark;