关键点: 用连接查询, 而不是用mybatis提供的属性select配置

MyBaits 3.2.6

MySQL 5.5.12

JDK1.6


模型：

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CREATE TABLE `person` (
`id` bigint (20) NOT NULL AUTO_INCREMENT COMMENT 'id' ,
` name ` varchar (24) NOT NULL COMMENT '用户名' ,
`pswd` varchar (16) NOT NULL COMMENT '密码' ,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT= '用户'
CREATE TABLE `extinfo` (
`id` bigint (20) NOT NULL AUTO_INCREMENT COMMENT 'id' ,
`personid` bigint (20) NOT NULL COMMENT '用户id' ,
`email` varchar (32) DEFAULT NULL COMMENT 'email' ,
`qq` bigint (20) DEFAULT NULL COMMENT 'QQ号' ,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8 COMMENT= '用户扩展信息（一个用户只能有一条扩展记录）'
CREATE TABLE `address` (
`id` bigint (20) NOT NULL AUTO_INCREMENT COMMENT 'id' ,
`personid` bigint (20) NOT NULL COMMENT '用户id' ,
`addr` varchar (128) DEFAULT NULL COMMENT '地址' ,
`zipcode` varchar (8) DEFAULT NULL COMMENT '邮编' ,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8 COMMENT= '地址（一个用户可以有多个地址）'
CREATE TABLE `orders` (
`id` bigint (20) NOT NULL AUTO_INCREMENT COMMENT 'ID' ,
`personid` bigint (20) NOT NULL COMMENT '用户ID' ,
`product` varchar (128) NOT NULL COMMENT '产品' ,
`num` int (11) NOT NULL COMMENT '数量' ,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8


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public class Person implements Serializable {
private long id;
private String name;           //用户名
private String pswd;           //密码
private Extinfo extinfo;
private List
addressList= new ArrayList
( 0 );
private List ordersList= new ArrayList( 0 );
public class Extinfo implements Serializable {
private long id;
private long personid;           //用户id
private String email;           //email
private long qq;           //QQ号
public class Address implements Serializable {
private long id;
private long personid;           //用户id
private String addr;           //地址
private String zipcode;           //邮编
public class Orders implements Serializable {
private long id;
private long personid;           //用户ID
private String product;           //产品
private int num;           //数量


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xml version = "1.0" encoding = "UTF-8" ?>
"http://mybatis.org/dtd/mybatis-3-config.dtd">
< configuration >
< properties resource = "config/jdbc.properties" />
< typeAliases >
< package name = "mypkg.entity" />
typeAliases >
< environments default = "development" >
< environment id = "development" >
< transactionManager type = "JDBC" />
< dataSource type = "POOLED" >
< property name = "driver" value = "${driver}" />
< property name = "url" value = "${url}" />
< property name = "username" value = "${username}" />
< property name = "password" value = "${password}" />
dataSource >
environment >
environments >
< mappers >
< mapper resource = "mypkg/entity/Person.xml" />
< mapper resource = "mypkg/entity/Extinfo.xml" />
< mapper resource = "mypkg/entity/Address.xml" />
< mapper resource = "mypkg/entity/Orders.xml" />
mappers >
configuration >


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xml version = "1.0" encoding = "UTF-8" ?>
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
< mapper namespace = "Person" >
< resultMap id = "rs_base" type = "Person" >
< id column = "id" property = "id" />
< result property = "name" column = "name" />
< result property = "pswd" column = "pswd" />
resultMap >
< resultMap id = "rs1" type = "Person" >
< id property = "id" column = "id" />
< result property = "name" column = "name" />
< result property = "pswd" column = "pswd" />
< association property = "extinfo" column = "id" select = "Extinfo.queryByPersonid" />
< collection property = "addressList" column = "id" select = "Address.queryByPersonid" />
< collection property = "ordersList" column = "id" select = "Orders.queryByPersonid" />
resultMap >
< select id = "find1" parameterType = "string" resultType = "Person" resultMap = "rs1" >
select * from person where name like "%"#{value}"%"
select >
< resultMap id = "rs2" type = "Person" >
< id property = "id" column = "p_id" />
< result property = "name" column = "name" />
< result property = "pswd" column = "pswd" />
< association property = "extinfo" column = "id" javaType = "extinfo" >
< id property = "id" column = "e_id" />
< result property = "personid" column = "personid" />
< result property = "email" column = "email" />
< result property = "qq" column = "qq" />
association >
resultMap >
< select id = "find2" parameterType = "string" resultType = "Person" resultMap = "rs2" >
select *,p.id as p_id, e.id as e_id from person p left join extinfo e on p.id=e.personid
where p.name like "%"#{value}"%"
select >
< resultMap id = "rs3" type = "Person" >
< id property = "id" column = "p_id" />
< result property = "name" column = "name" />
< result property = "pswd" column = "pswd" />
< collection property = "addressList" column = "id" javaType = "Address" >
< id property = "id" column = "a_id" />
< result property = "personid" column = "personid" />
< result property = "addr" column = "addr" />
< result property = "zipcode" column = "zipcode" />
collection >
resultMap >
< select id = "find3" parameterType = "string" resultType = "Person" resultMap = "rs3" >
select *,p.id as p_id, a.id as a_id from person p left join address a on p.id=a.personid
where p.name like "%"#{value}"%"
select >
< resultMap id = "rs4" type = "Person" autoMapping = "true" >
< id property = "id" column = "p_id" />
< result property = "name" column = "name" />
< result property = "pswd" column = "pswd" />
< association property = "extinfo" column = "id" javaType = "extinfo" >
< id property = "id" column = "e_id" />
< result property = "personid" column = "e_pid" />
< result property = "email" column = "email" />
< result property = "qq" column = "qq" />
association >
< collection property = "addressList" column = "id" javaType = "Address" >
< id property = "id" column = "a_id" />
< result property = "personid" column = "a_pid" />
< result property = "addr" column = "addr" />
< result property = "zipcode" column = "zipcode" />
collection >
resultMap >
< select id = "find4" parameterType = "string" resultType = "Person" resultMap = "rs4" >
select *,p.id as p_id, e.id as e_id, a.id as a_id,e.personid as e_pid ,a.personid as a_pid
from person p left join address a on p.id=a.personid
left join extinfo e on p.id = e.personid
where p.name like '%b%'
select >
< resultMap id = "rs5" type = "Person" autoMapping = "true" >
< id property = "id" column = "p_id" />
< result property = "name" column = "name" />
< result property = "pswd" column = "pswd" />
< association property = "extinfo" column = "id" javaType = "extinfo" >
< id property = "id" column = "e_id" />
< result property = "personid" column = "e_pid" />
< result property = "email" column = "email" />
< result property = "qq" column = "qq" />
association >
< collection property = "addressList" column = "id" ofType = "Address" >
< id property = "id" column = "a_id" />
< result property = "personid" column = "a_pid" />
< result property = "addr" column = "addr" />
< result property = "zipcode" column = "zipcode" />
collection >
< collection property = "ordersList" column = "id" ofType = "Orders" >
< id property = "id" column = "o_id" />
< result property = "personid" column = "o_pid" />
< result property = "product" column = "product" />
< result property = "num" column = "num" />
collection >
resultMap >
< select id = "find5" parameterType = "string" resultType = "Person" resultMap = "rs5" >
select *,p.id as p_id, e.id as e_id, a.id as a_id,e.personid as e_pid ,a.personid as a_pid,o.id as o_id,o.personid as o_pid
from person p left join address a on p.id=a.personid
left join extinfo e on p.id = e.personid
left join orders o on p.id = o.personid
where p.name like '%b%'
select >
< insert id = "insert" parameterType = "Person" useGeneratedKeys = "true" keyProperty = "id" >
insert into person(name,pswd) values(#{name},#{pswd})
insert >
< update id = "update" parameterType = "Person" >
update person set name=#{name},pswd=#{pswd} where id=#{id}
update >
< select id = "load" parameterType = "long" resultType = "Person" resultMap = "rs_base" >
select * from person where id = #{value}
select >
< delete id = "delete" parameterType = "long" >
delete from person where id = #{value}
delete >
< select id = "load4Map" resultType = "map" >
select * from person
select >
mapper >


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xml version = "1.0" encoding = "UTF-8" ?>
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
< mapper namespace = "Extinfo" >
< resultMap id = "rs_base" type = "Extinfo" >
< id column = "id" property = "id" />
< result property = "personid" column = "personid" />
< result property = "email" column = "email" />
< result property = "qq" column = "qq" />
resultMap >
< select id = "queryByPersonid" parameterType = "long" resultType = "Extinfo" resultMap = "rs_base" >
select * from extinfo where personid=#{value}
select >
mapper >
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xml version = "1.0" encoding = "UTF-8" ?>
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
< mapper namespace = "Address" >
< resultMap id = "rs_base" type = "Address" >
< id column = "id" property = "id" />
< result property = "personid" column = "personid" />
< result property = "addr" column = "addr" />
< result property = "zipcode" column = "zipcode" />
resultMap >
< select id = "queryByPersonid" parameterType = "long" resultType = "Address" resultMap = "rs_base" >
select * from address where personid=#{value}
select >
mapper >
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xml version = "1.0" encoding = "UTF-8" ?>
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
< mapper namespace = "Orders" >
< resultMap id = "rs_base" type = "Orders" >
< id column = "id" property = "id" />
< result property = "personid" column = "personid" />
< result property = "product" column = "product" />
< result property = "num" column = "num" />
resultMap >
< select id = "queryByPersonid" parameterType = "long" resultType = "Orders" resultMap = "rs_base" >
select * from orders where personid=#{value}
select >
mapper >
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#全局日志配置
log4j.rootLogger=debug, stdout
#包下所有类的日志级别
log4j.logger.org.apache.ibatis=debug
log4j.logger.java.sql. Connection =info, stdout
log4j.logger.java.sql.Statement=debug, stdout
log4j.logger.java.sql.PreparedStatement=debug, stdout
#日志输出到控制台
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %l  %m%n
#关闭Spring日志
log4j.category.org.springframework = OFF



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D:\jdk1. 6 .0_45\bin\java -Didea.launcher.port= 7533 -Didea.launcher.bin.path=C:\IDEA. 13.0 . 1 \bin -Dfile.encoding=UTF- 8 -classpath D:\jdk1. 6 .0_45\jre\lib\charsets.jar;D:\jdk1. 6 .0_45\jre\lib\deploy.jar;D:\jdk1. 6 .0_45\jre\lib\javaws.jar;D:\jdk1. 6 .0_45\jre\lib\jce.jar;D:\jdk1. 6 .0_45\jre\lib\jsse.jar;D:\jdk1. 6 .0_45\jre\lib\management-agent.jar;D:\jdk1. 6 .0_45\jre\lib\plugin.jar;D:\jdk1. 6 .0_45\jre\lib\resources.jar;D:\jdk1. 6 .0_45\jre\lib\rt.jar;D:\jdk1. 6 .0_45\jre\lib\ext\dnsns.jar;D:\jdk1. 6 .0_45\jre\lib\ext\localedata.jar;D:\jdk1. 6 .0_45\jre\lib\ext\sunjce_provider.jar;D:\jdk1. 6 .0_45\jre\lib\ext\sunmscapi.jar;D:\jdk1. 6 .0_45\jre\lib\ext\sunpkcs11.jar;D:\IdeaProjects\mybaitsdemo2\out\production\mybaitsdemo2;D:\IdeaProjects\mybaitsdemo2\lib\asm- 3.3 . 1 .jar;D:\IdeaProjects\mybaitsdemo2\lib\junit- 4.0 .jar;D:\IdeaProjects\mybaitsdemo2\lib\cglib- 2.2 . 2 .jar;D:\IdeaProjects\mybaitsdemo2\lib\log4j- 1.2 . 16 .jar;D:\IdeaProjects\mybaitsdemo2\lib\mybatis- 3.2 . 6 .jar;D:\IdeaProjects\mybaitsdemo2\lib\slf4j-api- 1.7 . 5 .jar;D:\IdeaProjects\mybaitsdemo2\lib\javassist- 3.17 . 1 -GA.jar;D:\IdeaProjects\mybaitsdemo2\lib\slf4j-log4j12- 1.7 . 5 .jar;D:\IdeaProjects\mybaitsdemo2\lib\commons-logging- 1.1 . 1 .jar;D:\IdeaProjects\mybaitsdemo2\lib\mysql-connector-java- 5.1 . 17 -bin.jar;C:\IDEA. 13.0 . 1 \lib\idea_rt.jar com.intellij.rt.execution.application.AppMain mypkg.dao.PersonDAO
2014 - 03 - 27 18 : 11 : 13 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java: 139 )  ==>  Preparing: select *,p.id as p_id, e.id as e_id, a.id as a_id,e.personid as e_pid ,a.personid as a_pid,o.id as o_id,o.personid as o_pid from person p left join address a on p.id=a.personid left join extinfo e on p.id = e.personid left join orders o on p.id = o.personid where p.name like '%b%'
2014 - 03 - 27 18 : 11 : 13 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java: 139 )  ==> Parameters:
2014 - 03 - 27 18 : 11 : 13 org.apache.ibatis.logging.jdbc.BaseJdbcLogger.debug(BaseJdbcLogger.java: 139 )  <==      Total: 15
Person{id= 1 , name= '张三b' , pswd= '111' }
Extinfo{id= 1 , personid= 1 , email= '[email protected]' , qq= 1231412341 }
Address{id= 1 , personid= 1 , addr= 'adsaaaa' , zipcode= '2342342' }
Address{id= 2 , personid= 1 , addr= 'werwqfqw' , zipcode= '2234234' }
Address{id= 3 , personid= 1 , addr= 'qwefaz' , zipcode= '2342342' }
Orders{id= 1 , personid= 1 , product= 'aaa' , num= 2 }
Person{id= 2 , name= '李四b' , pswd= '222' }
Extinfo{id= 2 , personid= 2 , email= '[email protected]' , qq= 827238782 }
Address{id= 4 , personid= 2 , addr= 'vzczsd' , zipcode= '13234234' }
Address{id= 5 , personid= 2 , addr= 'aaaaaaaaa' , zipcode= '2342356' }
Address{id= 6 , personid= 2 , addr= 'asawsd' , zipcode= '4564565' }
Orders{id= 2 , personid= 2 , product= 'bbb' , num= 3 }
Orders{id= 3 , personid= 2 , product= 'ccc' , num= 1 }
Person{id= 3 , name= '王五b' , pswd= '111' }
Extinfo{id= 3 , personid= 3 , email= '[email protected]' , qq= 234253234 }
Address{id= 7 , personid= 3 , addr= 'jkhkky' , zipcode= '2342342' }
Orders{id= 4 , personid= 3 , product= 'ddd' , num= 3 }
Orders{id= 5 , personid= 3 , product= 'asdf' , num= 21 }
Person{id= 5 , name= 'ggggb' , pswd= 'password' }
Extinfo{id= 5 , personid= 5 , email= '[email protected]' , qq= 8992837422 }
Orders{id= 7 , personid= 5 , product= 'zzdfa' , num= 232 }
Orders{id= 8 , personid= 5 , product= 'ggg' , num= 66 }
Person{id= 15 , name= 'testnameb' , pswd= 'password' }
Person{id= 19 , name= 'testnameb' , pswd= 'password' }
Process finished with exit code 0