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README
Apache-2.0

数据库链式操作类、目前只支持Mysql、SqlServer、后续会补上其他

参数设置

配置文件:jntoodb.properties
参数:
jntoo.db.debug=true  是否输出调试信息
jntoo.db.connection  设置获取数据库链接类名称继承自 ConnectionConfig 类,必须设置
jntoo.db.prefix      设置表前缀·设置后,QueryWrapper 会自动设置表得前缀

温馨提示、解释下方得sql 语句为编译后得结果展示

Pojo实体类

Table 注解

value      设置表名称、不填使用Class 类名称设计表,采用下划线方式
prefix     单独设置表前缀、不设置则使用配置得表前缀,prefix优先级高于系统配置
sysPrefix  是否使用配置得表前缀、默认为true

Fields 字段注解

value      字段名称、不设置则采用属性名称
type       设置字段类型、默认为普通、FieldType 目前只支持、默认、主键、自增主键、后期考虑增加JSON数组格式

DB 静态类 创建QueryWrapper 实例

DB.name(“表名称”)       创建 QueryMap 类,该类操作返回得数据为:QMap 类型数据
DB.name(Pojo类.class)  设置实体类,按实体类返回相关数据
DB.name(Pojo 实例)     设置实例,相关数据在查询时会以非null 得值写入查询条件,使用insert、update 插入即可插入

CURD 操作

Update 更新

DB.name(“表名称”).update(Map map) 数据更新方法,非空才会进行更新,空值不更新数据

Map map = new HashMap();

map.put("id" , 1);
map.put("field1" , 1);
map.put("field2" , 2);
map.put("field3" , 3);
Db.name("table").update(map);

DB.name(Pojo.class).update(pojo) Pojo.class 方式更新方法

// Pojo.class
Pojo pojo = new Pojo();
pojo.id = 1;
pojo.field1 = 1;
pojo.field2 = 2;
pojo.field3 = 3;
DB.name(Pojo.class).update(pojo); //数据更新方法默认按 主键id 进行条件更新

DB.name(pojo).update() 实例数据更新方法,

// Pojo 实例
Pojo pojo = new Pojo();
pojo.id = 1;
pojo.field1 = 1;
pojo.field2 = 2;
pojo.field3 = 3;
DB.name(pojo).update(); //数据更新方法默认按 主键id 进行条件更新
······ 温馨提示:更新操作可以使用where 设置条件进行更新

Insert 插入操作

DB.name(“表名称”).insert(Map map)

Map map = new HashMap();

map.put("id" , 1);
map.put("field1" , 1);
map.put("field2" , 2);
map.put("field3" , 3);
Db.name("table").insert(map);

DB.name(Pojo.class).insert(pojo) Pojo.class

// Pojo.class
Pojo pojo = new Pojo();
pojo.id = 1;
pojo.field1 = 1;
pojo.field2 = 2;
pojo.field3 = 3;
DB.name(Pojo.class).insert(pojo);

DB.name(pojo).insert() 实例数据更新方法,

// Pojo 实例
Pojo pojo = new Pojo();
pojo.id = 1;
pojo.field1 = 1;
pojo.field2 = 2;
pojo.field3 = 3;
DB.name(pojo).insert();

Delete 删除数据

DB.name("table").delete(int id) 根据主键 删除某行数据

DB.name("table").delete(1);   

// delete from table where id=?   ?=1

DB.name("table").delete(List id) 根据列表主键 删除多行数据

List list = new ArrayList();
list.add(1);
list.add(2);
list.add(3);
DB.name("table").delete(list);   

// delete from table where id in (?,?,?)   ?1=1  ?2=2  ?3=3

DB.name("table").where(条件1).where(条件2).delete() 根据自定义条件删除多行数据

DB.name("table").where("field" , 1).where("field2" , 2).delete();   

// delete from table where id field=? AND field2=?   ?1=1  ?2=2

Select查询多行

where 操作 (可写多个条件)

where(自定义条件) 不限制where 条件写法 等同于SQL语句: where 自定义条件 如下:

DB.name("table").where("1=1 AND field='12'").select();
// select * from table WHERE 1=1 AND field='12'

where(String field , Object value) 等于条件 如:

DB.name("table").where("field",12).select();
// select * from table where field=?  条件 ?=12  自动写入绑定

where(String field ,String exp, Object value) 等于条件 如:

field  字段名
exp    条件符号  可写 =、!=、>、>=、<、<=、in、not in、between、not between、like、not like
       其中 =、!=、 > 、>= 、< 、<= 可以使用
          eq、neq、gt、egt、lt、elt 替换
value  条件值

DB.name("table").where("field1" , "like" ,"%data%").where("field2","eq",12).select();
// select * from table where field1 like ? field2=?  条件 ?1='%data%'  ?2=12  自动写入绑定

where 便捷方法

whereIn whereInNot whereLike whereLikeNot whereBetween whereBetweenNot

order 排序 (可写多个条件)

····· order(String order) 设置排序字段
DB.name("table").where("field",12).order("id desc").select();
// select * from table where field=? order by id desc 条件 ?=12  自动写入绑定
····· order(String field ,String sort) 设置排序字段
DB.name("table").where("field",12).order("id","desc").select();
// select * from table where field=? order by id desc 条件 ?=12  自动写入绑定
····· orderDesc(String field) 设置排序字段
DB.name("table").where("field",12).orderDesc("id").select();
// select * from table where field=? order by id desc 条件 ?=12  自动写入绑定
····· orderAsc(String field) 设置排序字段
DB.name("table").where("field",12).orderAsc("id").select();
// select * from table where field=? order by id Asc 条件 ?=12  自动写入绑定

limit 设置获取条数 兼容(mysql sqlserver)

····· limit(long size) 设置获取条数
DB.name("table").where("field",12).orderAsc("id").limit(10).select();
// select * from table where field=? order by id Asc LIMIT ? 条件 ?1=12 ?2=10   自动写入绑定
····· limit(long offset , long size) 设置从某位置开始获取多少条数据
DB.name("table").where("field",12).orderAsc("id").limit(0,20).select();
// select * from table where field=? order by id Asc LIMIT ?,? 条件 ?1=12 ?2=0 ?3=20   自动写入绑定

join 数据库join链接操作

····· joinLeft(String table , String condtion) 设置左链接
····· joinRight(String table , String condtion) 设置右链接
····· joinInner(String table , String condtion) 设置全链接
DB.name("table1").alias("t1")
.joinLeft("table2 t2" , "t1.id=t2.id")
.field("t1.*")
.field("t2.name")
.where("t1.data" , 1)
.limit(20)
.select();
select t1.*,t2.name 
FROM table1 as t1 
LEFT JOIN table2 t2 ON t1.id=t2.id 
where t1.data=?
limit 20

?=1
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