mybatis的sql标记的使用

webtet

数据库：

create table INSURANCE_PRODUCT
(
product_code  VARCHAR2(32) not null,
product_name  NVARCHAR2(20),
product_type  VARCHAR2(1),
validate_date VARCHAR2(8)
)
;
alter table INSURANCE_PRODUCT
add constraint PK primary key (PRODUCT_CODE);
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('01001', '牙刷', '1', '20150819');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('01002', '毛巾', '1', '20150818');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('01003', '脸盆', '1', '20150817');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('02001', '手机', '2', '20150820');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('02002', '笔记本', '2', '20150821');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('02003', 'ipad', '2', '20150822');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('03001', '苹果', '3', '20150101');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('03002', '香蕉', '3', '20150102');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('03003', '梨子', '3', '20150103');
insert into INSURANCE_PRODUCT (product_code, product_name, product_type, validate_date)
values ('04001', '衣服', '4', '20150808');
commit;


BaseMapper.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="baseMapper">
<sql id="filterWhereParam">
<foreach collection="mapTag" item="myvalue" index="mykey">
<if test="myvalue != null and myvalue != ''"></if>
and ${mykey} = #{myvalue}
</foreach>
</sql>
</mapper>


InsuranceProductMapper.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="InsuranceProductMapper">
<resultMap type="entity.InsuranceProduct" id="queryMap">
<id column="PRODUCT_CODE" property="productCode"/>
<result column="PRODUCT_NAME" property="productName"/>
<result column="PRODUCT_TYPE" property="productType"/>
<result column="VALIDATE_DATE" property="validateDate"/>
</resultMap>
<select id="selectAllByCondition" resultMap="queryMap" parameterType="query.Query">
select t.PRODUCT_CODE, t.PRODUCT_NAME, t.PRODUCT_TYPE, t.VALIDATE_DATE
from INSURANCE_PRODUCT t  where 1 = 1
<include refid="baseMapper.filterWhereParam"></include>
</select>
</mapper>


查询参数 Query.java：

package query;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class Query {
private List<String> listTag = new ArrayList<String>();
private Map<String, String> mapTag = new HashMap<String, String>();
public List<String> getListTag() {
return listTag;
}
public void setListTag(List<String> listTag) {
this.listTag = listTag;
}
public Map<String, String> getMapTag() {
return mapTag;
}
public void setMapTag(Map<String, String> mapTag) {
this.mapTag = mapTag;
}
}


表对应的实体类 InsuranceProduct.java：

package entity;
public class InsuranceProduct {
private String productCode;
private String productName;
private String productType;
private String validateDate;
public String getProductCode() {
return productCode;
}
public void setProductCode(String productCode) {
this.productCode = productCode;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public String getProductType() {
return productType;
}
public void setProductType(String productType) {
this.productType = productType;
}
public String getValidateDate() {
return validateDate;
}
public void setValidateDate(String validateDate) {
this.validateDate = validateDate;
}
@Override
public String toString() {
return "\nInsuranceProduct [productCode=" + productCode
+ ", productName=" + productName + ", productType="
+ productType + ", validateDate=" + validateDate + "]\n";
}
}


TestMybatis.java：

package test;
import java.io.InputStream;
import java.util.List;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;
import query.Query;
public class TestMybatis {
@Test
public void testCommon(){
//mybatis的配置文件
String resource = "mybatis-config.xml";
//使用类加载器加载mybatis的配置文件（它也加载关联的映射文件）
InputStream is = TestMybatis.class.getClassLoader().getResourceAsStream(resource);
//构建sqlSession的工厂
SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(is);
//创建能执行映射文件中sql的sqlSession
SqlSession session = sessionFactory.openSession();
String statement = "InsuranceProductMapper.selectAllByCondition";//映射sql的标识字符串
List<Object> list = session.selectList(statement);
System.out.println(list);
}
@Test
public void testForeachSimple(){
//mybatis的配置文件
String resource = "mybatis-config.xml";
//使用类加载器加载mybatis的配置文件（它也加载关联的映射文件）
InputStream is = TestMybatis.class.getClassLoader().getResourceAsStream(resource);
//构建sqlSession的工厂
SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(is);
//创建能执行映射文件中sql的sqlSession
SqlSession session = sessionFactory.openSession();
String statement = "InsuranceProductMapper.selectAllByCondition";//映射sql的标识字符串
Query query = new Query();
query.getMapTag().put("t.PRODUCT_CODE", "01001");
System.out.println(query.getMapTag());
List<Object> list = session.selectList(statement, query);
System.out.println(list);
}
}


参考：http://blog.csdn.net/isea533/article/details/22336991