本篇文章为你整理了3、spring+mybatis关联映射（无mapper实现类）+idea+maven（）的详细内容，包含有 3、spring+mybatis关联映射（无mapper实现类）+idea+maven，希望能帮助你了解 3、spring+mybatis关联映射（无mapper实现类）+idea+maven。
该工程采用spring+mybatis的关联映射，动态sql，sql片段实现
1、搭建项目结构如下
2、配置项目的pom.xml文件中的依赖
1 ?xml version="1.0" encoding="UTF-8"?
3 project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
5 modelVersion 4.0.0 /modelVersion
7 groupId com /groupId
8 artifactId springmybatis_day44_03 /artifactId
9 version 1.0-SNAPSHOT /version
10 packaging war /packaging
12 name springmybatis_day44_03 Maven Webapp /name
13 !-- FIXME change it to the projects website --
14 url http://www.example.com /url
16 properties
17 project.build.sourceEncoding UTF-8 /project.build.sourceEncoding
18 maven.compiler.source 1.7 /maven.compiler.source
19 maven.compiler.target 1.7 /maven.compiler.target
20 /properties
23 dependencies
25 dependency
26 groupId junit /groupId
27 artifactId junit /artifactId
28 version 4.11 /version
29 /dependency
31 !--1 https://mvnrepository.com/artifact/org.springframework/spring-beans --
32 dependency
33 groupId org.springframework /groupId
34 artifactId spring-beans /artifactId
35 version 4.3.6.RELEASE /version
36 /dependency
39 !--2 https://mvnrepository.com/artifact/org.springframework/spring-context --
40 dependency
41 groupId org.springframework /groupId
42 artifactId spring-context /artifactId
43 version 4.3.6.RELEASE /version
44 /dependency
47 !-- 3https://mvnrepository.com/artifact/org.springframework/spring-core --
48 dependency
49 groupId org.springframework /groupId
50 artifactId spring-core /artifactId
51 version 4.3.6.RELEASE /version
52 /dependency
55 !--4 https://mvnrepository.com/artifact/org.springframework/spring-expression --
56 dependency
57 groupId org.springframework /groupId
58 artifactId spring-expression /artifactId
59 version 4.3.6.RELEASE /version
60 /dependency
63 !--5 https://mvnrepository.com/artifact/org.springframework/spring-aop --
64 dependency
65 groupId org.springframework /groupId
66 artifactId spring-aop /artifactId
67 version 4.3.6.RELEASE /version
68 /dependency
71 !--6 https://mvnrepository.com/artifact/aopalliance/aopalliance --
72 dependency
73 groupId aopalliance /groupId
74 artifactId aopalliance /artifactId
75 version 1.0 /version
76 /dependency
79 !--7 https://mvnrepository.com/artifact/org.aspectj/aspectjweaver --
80 dependency
81 groupId org.aspectj /groupId
82 artifactId aspectjweaver /artifactId
83 version 1.8.10 /version
84 /dependency
87 !--8 https://mvnrepository.com/artifact/log4j/log4j --
88 dependency
89 groupId log4j /groupId
90 artifactId log4j /artifactId
91 version 1.2.17 /version
92 /dependency
95 !--9 https://mvnrepository.com/artifact/commons-logging/commons-logging --
96 dependency
97 groupId commons-logging /groupId
98 artifactId commons-logging /artifactId
99 version 1.2 /version
100 /dependency
103 !--10 https://mvnrepository.com/artifact/org.springframework/spring-jdbc --
104 dependency
105 groupId org.springframework /groupId
106 artifactId spring-jdbc /artifactId
107 version 4.3.6.RELEASE /version
108 /dependency
111 !--11 https://mvnrepository.com/artifact/org.springframework/spring-orm --
112 dependency
113 groupId org.springframework /groupId
114 artifactId spring-orm /artifactId
115 version 4.3.6.RELEASE /version
116 /dependency
119 !--12 https://mvnrepository.com/artifact/org.springframework/spring-tx --
120 dependency
121 groupId org.springframework /groupId
122 artifactId spring-tx /artifactId
123 version 4.3.6.RELEASE /version
124 /dependency
127 !--13 https://mvnrepository.com/artifact/org.springframework/spring-web --
128 dependency
129 groupId org.springframework /groupId
130 artifactId spring-web /artifactId
131 version 4.3.6.RELEASE /version
132 /dependency
135 !--14 https://mvnrepository.com/artifact/org.springframework/spring-webmvc --
136 dependency
137 groupId org.springframework /groupId
138 artifactId spring-webmvc /artifactId
139 version 4.3.6.RELEASE /version
140 /dependency
143 !--15 https://mvnrepository.com/artifact/org.mybatis/mybatis --
144 dependency
145 groupId org.mybatis /groupId
146 artifactId mybatis /artifactId
147 version 3.4.6 /version
148 /dependency
150 !--17 https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --
151 dependency
152 groupId org.mybatis /groupId
153 artifactId mybatis-spring /artifactId
154 version 1.3.2 /version
155 /dependency
158 !--16 https://mvnrepository.com/artifact/mysql/mysql-connector-java --
159 dependency
160 groupId mysql /groupId
161 artifactId mysql-connector-java /artifactId
162 version 5.1.38 /version
163 /dependency
166 !--18 https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --
167 dependency
168 groupId javax.servlet /groupId
169 artifactId javax.servlet-api /artifactId
170 version 3.1.0 /version
171 /dependency
173 !--19 https://mvnrepository.com/artifact/javax.servlet/jstl --
174 dependency
175 groupId javax.servlet /groupId
176 artifactId jstl /artifactId
177 version 1.2 /version
178 /dependency
181 !--20 https://mvnrepository.com/artifact/taglibs/standard --
182 dependency
183 groupId taglibs /groupId
184 artifactId standard /artifactId
185 version 1.1.2 /version
186 /dependency
188 /dependencies
190 /project
pom.xml
3、在java目录下的com.pojo包下构建2个实体类，即Dept.java 和Emp.java
1 package com.pojo;
2 import java.util.List;
3 /**
4 * 一方引用多方list集合
5 */
6 public class Dept {
7 private Integer deptno ;
8 private String dname ;
9 private String loc ;
11 public Dept() {
14 public Dept(Integer deptno, String dname, String loc) {
15 this.deptno = deptno;
16 this.dname = dname;
17 this.loc = loc;
20 public Integer getDeptno() {
21 return deptno;
24 public void setDeptno(Integer deptno) {
25 this.deptno = deptno;
29 public String getDname() {
30 return dname;
33 public void setDname(String dname) {
34 this.dname = dname;
38 public String getLoc() {
39 return loc;
42 public void setLoc(String loc) {
43 this.loc = loc;
46 @Override
47 public String toString() {
48 return "Dept{" +
49 "deptno=" + deptno +
50 ", dname=" + dname + \ +
51 ", loc=" + loc + \ +
52 };
54 }
Dept.java
1 package com.pojo;
3 /**
4 * 多方引用一方对象
5 */
6 public class Emp {
7 private Integer empno ;
8 private String ename ;
9 private String job ;
10 private Integer mgr ;
11 private String hiredate ;
12 private Double sal ;
13 private Double comm ;
14 private Dept dept;
16 public Emp() {
17 }
19 public Emp(Integer empno, String ename, String job, Integer mgr, String hiredate, Double sal, Double comm, Dept dept) {
20 this.empno = empno;
21 this.ename = ename;
22 this.job = job;
23 this.mgr = mgr;
24 this.hiredate = hiredate;
25 this.sal = sal;
26 this.comm = comm;
27 this.dept = dept;
28 }
30 public Integer getEmpno() {
31 return empno;
32 }
34 public void setEmpno(Integer empno) {
35 this.empno = empno;
36 }
39 public String getEname() {
40 return ename;
41 }
43 public void setEname(String ename) {
44 this.ename = ename;
45 }
48 public String getJob() {
49 return job;
50 }
52 public void setJob(String job) {
53 this.job = job;
54 }
57 public Integer getMgr() {
58 return mgr;
59 }
61 public void setMgr(Integer mgr) {
62 this.mgr = mgr;
63 }
66 public String getHiredate() {
67 return hiredate;
68 }
70 public void setHiredate(String hiredate) {
71 this.hiredate = hiredate;
72 }
75 public Double getSal() {
76 return sal;
77 }
79 public void setSal(Double sal) {
80 this.sal = sal;
81 }
84 public Double getComm() {
85 return comm;
86 }
88 public void setComm(Double comm) {
89 this.comm = comm;
90 }
92 public Dept getDept() {
93 return dept;
94 }
96 public void setDept(Dept dept) {
97 this.dept = dept;
98 }
100 @Override
101 public String toString() {
102 return "Emp{" +
103 "empno=" + empno +
104 ", ename=" + ename + \ +
105 ", job=" + job + \ +
106 ", mgr=" + mgr +
107 ", hiredate=" + hiredate + \ +
108 ", sal=" + sal +
109 ", comm=" + comm +
110 ", dept=" + dept +
111 };
112 }
113 }
Emp.java
4、在java目录下的com.mapper包下构建2个映射接口，即DeptMapppr.java 和EmpMapper.java
1 package com.mapper;
2 import com.pojo.Dept;
3 import java.util.List;
4 public interface DeptMapper {
5 List Dept selectAllDept();
6 }
DeptMapper.java
1 package com.mapper;
3 import com.pojo.Emp;
5 import java.util.List;
7 public interface EmpMapper {
8 List Emp selectEmp(Emp emp);
9 int insertEmp(Emp emp);
10 int updateEmp(Emp emp);
11 int deleteEmp(Emp emp);
12 }
EmpMapper.java
5、在java目录下的com.servicer包下构建2个业务层接口，即DeptService.java 和EmpService.java，和2个业务层接口实现类，即DeptServiceImpl.java 和EmpServiceImpl.java
1 package com.service;
3 import com.pojo.Dept;
5 import java.util.List;
7 public interface DeptService {
8 List Dept downOption();
9 }
DeptService.java
1 package com.service;
3 import com.pojo.Emp;
5 import java.util.List;
7 public interface EmpService {
8 List Emp show(Emp emp);
9 int add(Emp emp);
10 int edit(Emp emp);
11 int del(Emp emp);
12 }
EmpService.java
1 package com.service;
3 import com.mapper.DeptMapper;
4 import com.pojo.Dept;
6 import java.util.List;
8 public class DeptServiceImpl implements DeptService{
9 private DeptMapper deptMapper;
11 public DeptMapper getDeptMapper() {
12 return deptMapper;
15 public void setDeptMapper(DeptMapper deptMapper) {
16 this.deptMapper = deptMapper;
19 @Override
20 public List Dept downOption() {
21 return deptMapper.selectAllDept();
23 }
DeptServiceImpl.java
1 package com.service;
3 import com.mapper.EmpMapper;
4 import com.pojo.Emp;
6 import java.util.List;
8 public class EmpServiceImpl implements EmpService {
9 private EmpMapper empMapper;
11 public EmpMapper getEmpMapper() {
12 return empMapper;
15 public void setEmpMapper(EmpMapper empMapper) {
16 this.empMapper = empMapper;
19 @Override
20 public List Emp show(Emp emp) {
21 return empMapper.selectEmp(emp);
24 @Override
25 public int add(Emp emp) {
26 return empMapper.insertEmp(emp);
29 @Override
30 public int edit(Emp emp) {
31 return empMapper.updateEmp(emp);
34 @Override
35 public int del(Emp emp) {
36 return empMapper.deleteEmp(emp);
38 }
EmpServiceImpl.java
6、在resources目录下的mapper包下构建2个映射xml文件，即DeptMapppr.xml和EmpMapper.xml
1 ?xml version="1.0" encoding="UTF-8" ?
2 !DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"
3 !--配置规则：--
4 !--有代理的namespace值必须是映射接口全路径，sql节点的id值必须是映射接口中的方法名--
5 !--无代理的namespace值和sql节点的id值是任意的，但一般情况下和和有代理的原则一样--
6 mapper namespace="com.mapper.DeptMapper"
7 select id="selectAllDept" resultType="Dept"
8 select * from dept
9 /select
10 /mapper
DeptMapppr.xml
1 ?xml version="1.0" encoding="UTF-8" ?
2 !DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"
3 mapper namespace="com.mapper.EmpMapper"
4 !-- 案例：select * from emp where empno=#{empno} or ename=#{ename} and job=#{job}
5 如果select节点中是以上sql语句，parameterType是Emp类型，则此情况可以使用where标签,
6 where标签的作用是如果if条件不满足则执行，如果满足if条件将会忽略where关键字后的
7 第一个or或and
8 select * from emp
9 where
10 if test="empno!=null"
11 empno=#{empno}
12 /if
13 if test="ename!=null"
14 or ename=#{ename}
15 /if
16 if test="job!=null"
17 and job=#{job}
18 /if
19 /where
20 --
21 !--if或when的test条件中的属性判断，必须从参数对象的第一层属性判断起，--
22 !--如果Emp类中有empno属性，有dept对象属性，则要判断empno值和dept中deptno的值，--
23 !--则写法是empno！=null，dept！=null dept.deptno!=null--
24 select id="selectEmp" resultMap="empmap" parameterType="Emp"
25 select d.dname,d.loc,e.* from emp e,dept d where e.deptno=d.deptno
26 if test="empno!=null"
27 and e.empno=#{empno}
28 /if
29 if test="ename!=null"
30 and e.ename=#{ename}
31 /if
32 if test="job!=null"
33 and e.job=#{job}
34 /if
35 if test="dept!=null and dept.deptno!=null"
36 and e.deptno=#{dept.deptno}
37 /if
38 /select
40 resultMap id="empmap" type="Emp"
41 !--因为当前多方配置，因此在resultMap中先配置多方的主键和普通列的映射--
42 id column="EMPNO" property="empno"/
43 result column="ENAME" property="ename"/
44 result column="JOB " property="job"/
45 result column="MGR" property="mgr"/
46 result column="HIREDATE" property="hiredate"/
47 result column="SAL" property="sal"/
48 result column="COMM" property="comm"/
50 !--因为在多方引用了一方的对象，因此在引用一方对象属性的地方配置association节点--
51 !--association节点的property属性对应的多方引用一方的对象属性名,--
52 !--javaType是多方引用一方的类类型即配置类的全路径--
53 !--column是多方关联一方的外键列的列名--
54 association property="dept" javaType="Dept" column="DEPTNO"
55 !--由于多方引用的了一方对象，因此在association对象节点下配置一方的主键和普通字段--
56 id column="DEPTNO" property="deptno"/
57 result column="DNAME" property="dname"/
58 result column="LOC" property="loc"/
59 /association
60 /resultMap
62 insert id="insertEmp" parameterType="Emp"
63 INSERT INTO emp(empno, ename, job, mgr, hiredate, sal, comm, deptno) VALUES
64 (#{empno},#{ename},#{job},#{mgr},#{hiredate},#{sal},#{comm},#{dept.deptno})
65 /insert
67 !--set标签的结束标签要在where条件之前--
68 update id="updateEmp" parameterType="Emp"
69 UPDATE emp
70 set
71 if test="ename!=null"
72 ename=#{ename} ,
73 /if
74 if test="job!=null"
75 job=#{job} ,
76 /if
77 if test="mgr!=null"
78 mgr=#{mgr} ,
79 /if
80 if test="hiredate!=null"
81 hiredate=#{hiredate} ,
82 /if
83 if test="sal!=null"
84 sal=#{sal},
85 /if
86 if test="comm!=null"
87 comm=#{comm},
88 /if
89 if test="dept!=null and dept.deptno!=null"
90 deptno=#{dept.deptno} ,
91 /if
92 /set
93 include refid="wherecondition"/
94 /update
96 delete id="deleteEmp" parameterType="Emp"
97 delete from emp
98 include refid="wherecondition"/
99 /delete
101 !--定义公共的sql片段--
102 sql id="wherecondition"
103 where
104 if test="empno!=null"
105 empno=#{empno}
106 /if
107 /where
108 /sql
110 /mapper
EmpMapper.xml
7、在resources根目录下编辑log4j.properties日志文件
1 log4j.rootLogger=DEBUG, Console
2 #Console
3 log4j.appender.Console=org.apache.log4j.ConsoleAppender
4 log4j.appender.Console.layout=org.apache.log4j.PatternLayout
5 log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
7 log4j.logger.org.apache=INFO
8 log4j.logger.java.sql.ResultSet=INFO
9 log4j.logger.java.sql.Connection=DEBUG
10 log4j.logger.java.sql.Statement=DEBUG
11 log4j.logger.java.sql.PreparedStatement=DEBUG
log4j.properties
8、在resources根目录下构建spring的xml文件，即applicationContext.xml日志文件
1 ?xml version="1.0" encoding="UTF-8"?
2 beans xmlns="http://www.springframework.org/schema/beans"
3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4 xmlns:aop="http://www.springframework.org/schema/aop"
5 xmlns:context="http://www.springframework.org/schema/context"
6 xmlns:tx="http://www.springframework.org/schema/tx"
7 xmlns:mvc="http://www.springframework.org/schema/mvc"
8 xsi:schemaLocation="http://www.springframework.org/schema/beans
9 http://www.springframework.org/schema/beans/spring-beans.xsd
10 http://www.springframework.org/schema/aop
11 http://www.springframework.org/schema/aop/spring-aop.xsd
12 http://www.springframework.org/schema/context
13 http://www.springframework.org/schema/context/spring-context.xsd
14 http://www.springframework.org/schema/tx
15 http://www.springframework.org/schema/tx/spring-tx.xsd
16 http://www.springframework.org/schema/mvc
17 http://www.springframework.org/schema/mvc/spring-mvc.xsd
18 "
19 !--1.驱动管理数据源--
20 bean id="dataSource"
21 property name="driverClassName" value="com.mysql.jdbc.Driver"/
22 property name="url" value="jdbc:mysql://localhost:3306/ar"/
23 property name="username" value="root"/
24 property name="password" value="123456"/
25 /bean
26 !--2.数据源事务管理，注意id的必须是transactionManager--
27 bean id="transactionManager"
28 property name="dataSource" ref="dataSource"/
29 /bean
30 !--3.事务注解驱动--
31 tx:annotation-driven transaction-manager="transactionManager"/
32 !--4.sqlsessionfactorybean--
33 bean id="sqlSessionFactory"
34 property name="dataSource" ref="dataSource"/
35 !--配置某个包下的类全路径的别名,别名是类名--
36 property name="typeAliasesPackage" value="com.pojo"/
38 !--引用mybatis映射文件的写法--
39 property name="mapperLocations" value="classpath:mapper/*.xml"/
41 !--引用mybatis主配置文件的写法--
42 !-- property name="configLocation" value="mybatisConfig.xml"/ --
43 /bean
45 !--5.SqlSessionTemplate--
46 !--采用构造注入--
47 bean id="sqlSessionTemplate"
48 constructor-arg ref="sqlSessionFactory"/
49 /bean
51 !--6.映射工厂bean，引用映射接口，底层代理会自动帮我们完成映射接口实现类的部分--
52 bean id="deptMapper"
53 property name="sqlSessionTemplate" ref="sqlSessionTemplate"/
54 property name="mapperInterface" value="com.mapper.DeptMapper"/
55 /bean
57 bean id="empMapper"
58 property name="sqlSessionTemplate" ref="sqlSessionTemplate"/
59 property name="mapperInterface" value="com.mapper.EmpMapper"/
60 /bean
62 bean id="deptService"
63 property name="deptMapper" ref="deptMapper"/
64 /bean
65 bean id="empService"
66 property name="empMapper" ref="empMapper"/
67 /bean
68 /beans
applicationContext.xml
9、在java目录下的com.test包下构建测试类，即ScottTest.java
1 package com.test;
2 import com.mapper.DeptMapper;
3 import com.mapper.EmpMapper;
4 import com.pojo.Dept;
5 import com.pojo.Emp;
6 import com.service.DeptService;
7 import com.service.EmpService;
8 import org.junit.Test;
9 import org.springframework.context.ApplicationContext;
10 import org.springframework.context.support.ClassPathXmlApplicationContext;
11 import java.util.List;
12 public class ScottTest {
13 ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml");
14 DeptService deptService= (DeptService)ac.getBean("deptService");
15 EmpService empService= (EmpService)ac.getBean("empService");
17 @Test
18 public void selectDept(){
20 List Dept deptList=deptService.downOption();
21 for (Dept d:deptList) {
22 System.out.println(d);
26 @Test
27 public void selectEmp(){
28 Emp emp=new Emp();
29 // emp.setEmpno(7788);
30 // emp.setEname("SCOTT");
31 // emp.setJob("SALESMAN");
32 emp.setDept(new Dept(20,null,null));
33 List Emp emplist=empService.show(emp);
34 for (Emp e:emplist ) {
35 System.out.println(e);
39 @Test
40 public void insertEmp(){
41 Dept dept= new Dept(10,null,null);
42 Emp emp=new Emp(1,"holly","teacher",7788,
43 "2015-05-05",1200.00,15.00,dept);
44 System.out.println(empService.add(emp) 0?"add success":"add fail");
46 @Test
47 public void updateEmp(){
48 Dept dept= new Dept(20,null,null);
49 Emp emp=new Emp(1,"holly","teacher",7788,
50 "2015-05-05",1200.00,15.00,dept);
51 System.out.println(empService.edit(emp) 0?"update success":"update fail");
53 @Test
54 public void deleteEmp(){
55 Emp emp=new Emp();
56 emp.setEmpno(1);
57 System.out.println(empService.del(emp) 0?"delete success":"delete fail");
59 }
ScottTest.java
10、简单测试某个方法
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