mybatis_select_标签

mybatis select的输入和输出

例如 select id,name,age from user where name like '%王%' and age>20

这里既有输入也有输出

select的属性
id,parameterClass,resultClass,parameterMap,resultMap,cacheModel
resultSetType,fetchSize,xmlResultName,remapResults,timeout
输入 parameterClass,ParameterMap
resultSetTYpe为结果集类型，主要是说游标，具有方向性，可以取
forward_only,scoll_insensitive,scoll_sensitive,具体情况具体配置

fetchSize 预取回数据量的大小

xmlResultName,返回result为xml的名称

如果返回的结果可以修改则吧remapResults设为true,否则设为false

输入，用参数带进来
可以是#，$做为占位符

不同占位符使用


Xml代码
parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#

parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT like '$department$'


Xml代码
parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#

parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT like '$department$'



#不能放在‘’之内

resultMap



Xml代码

parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#



parameterClass="string">
SELECT USERID as userid, USERNAME as username, PASSWORD as
password, DEPARTMENT as department FROM USER WHERE
DEPARTMENT=#department#



parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#









parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#









parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#



Xml代码

parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#



parameterClass="string">
SELECT USERID as userid, USERNAME as username, PASSWORD as
password, DEPARTMENT as department FROM USER WHERE
DEPARTMENT=#department#



parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#









parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#









parameterClass="string">
SELECT * FROM USER WHERE DEPARTMENT=#department#






map映射 ，返回的list里的每一项都是一个map然后有键值对

xml映射


Xml代码

xmlResultName="log">
SELECT * FROM USER_ACCOUNT WHERE GROUPNAME=#groupName#


Xml代码

xmlResultName="log">
SELECT * FROM USER_ACCOUNT WHERE GROUPNAME=#groupName#



resultClass="xml"这个xml也是预定义好的类
在测试类里调用后返回的是xml格式的字符串，指定的xmlResultName相当于xml的
根元素



返回结果有三类，1 返回直接指定的类 2 返回map类型 3 返回xml