JavaPersistenceWithMyBatis3笔记-第3章SQL Mappers Using XMLs-001

一、

1.Mapper

2.Service

3.Domain

 package com.mybatis3.domain;

 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;

 /**
  * @author Siva
  *
  */
 public class Course implements Serializable
 {
     private static final long serialVersionUID = 1L;

     private Integer courseId;
     private String name;
     private String description;
     private Date startDate;
     private Date endDate;
     private Tutor tutor;
     private List<Student> students;

     @Override
     public String toString() {
         return "Course [courseId=" + courseId + ", name=" + name + ", description="
                 + description + ", startDate=" + startDate + ", endDate="
                 + endDate + ", tutor=" + tutor + ", students=" + students + "]";
     }
     public Integer getCourseId()
     {
         return courseId;
     }
     public void setCourseId(Integer id)
     {
         this.courseId = id;
     }
     public String getName()
     {
         return name;
     }
     public void setName(String name)
     {
         this.name = name;
     }
     public String getDescription()
     {
         return description;
     }
     public void setDescription(String description)
     {
         this.description = description;
     }
     public Date getStartDate()
     {
         return startDate;
     }
     public void setStartDate(Date startDate)
     {
         this.startDate = startDate;
     }
     public Date getEndDate()
     {
         return endDate;
     }
     public void setEndDate(Date endDate)
     {
         this.endDate = endDate;
     }
     public List<Student> getStudents()
     {
         if(students == null){
             students = new ArrayList<Student>(0);
         }
         return students;
     }
     public void setStudents(List<Student> students)
     {
         this.students = students;
     }
     public Tutor getTutor() {
         return tutor;
     }
     public void setTutor(Tutor tutor) {
         this.tutor = tutor;
     }

 }

 package com.mybatis3.domain;

 import java.io.Serializable;
 import java.util.List;

 /**
  * @author Siva
  *
  */
 public class Tutor implements Serializable
 {
     private static final long serialVersionUID = 1L;

     private Integer tutorId;
     private String name;
     private String email;
     private Address address;
     private List<Course> courses;

     @Override
     public String toString() {
         return "Tutor [tutorId=" + tutorId + ", name=" + name + ", email=" + email
                 + ", address=" + address + ", courses=" + courses + "]";
     }
     public Tutor()
     {
     }
     public Tutor(Integer id)
     {
         this.tutorId = id;
     }
     public Integer getTutorId()
     {
         return tutorId;
     }
     public void setTutorId(Integer id)
     {
         this.tutorId = id;
     }
     public String getName()
     {
         return name;
     }
     public void setName(String name)
     {
         this.name = name;
     }
     public String getEmail()
     {
         return email;
     }
     public void setEmail(String email)
     {
         this.email = email;
     }
     public Address getAddress()
     {
         return address;
     }
     public void setAddress(Address address)
     {
         this.address = address;
     }
     public List<Course> getCourses() {
         return courses;
     }
     public void setCourses(List<Course> courses) {
         this.courses = courses;
     }

 }

4.辅助类

5.配置及资源文件

(1)AddressMapper.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="com.mybatis3.mappers.AddressMapper">

       <resultMap type="Address" id="AddressResult">
           <id property="addrId" column="addr_id"/>
         <result property="street" column="street"/>
         <result property="city" column="city"/>
         <result property="state" column="state"/>
         <result property="zip" column="zip"/>
         <result property="country" column="country"/>
       </resultMap>

       <select id="selectAddressById" parameterType="int" resultMap="AddressResult">
           select * from addresses where addr_id=#{addrId}
       </select>

 </mapper>

(2)CourseMapper.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="com.mybatis3.mappers.CourseMapper">

     <cache eviction="FIFO" flushInterval="60000" size="512" readOnly="false"/>

       <resultMap type="Course" id="CourseResult">
           <id     column="course_id" property="courseId"/>
           <result column="name" property="name"/>
           <result column="description" property="description"/>
           <result column="start_date" property="startDate"/>
           <result column="end_date" property="endDate"/>
       </resultMap>

       <select id="selectCoursesByTutor" parameterType="int" resultMap="CourseResult">
           select * from courses where tutor_id=#{tutorId}
       </select>

       <select id="searchCourses" parameterType="hashmap" resultMap="CourseResult" useCache="false">
           SELECT * FROM COURSES
           WHERE TUTOR_ID= #{tutorId}
           <if test="courseName != null">
               AND name like #{courseName}
           </if>
           <if test="startDate != null">
               AND start_date  &gt;= #{startDate}
           </if>
           <if test="endDate != null">
               AND end_date  &lt;= #{endDate}
           </if>

       </select>

       <select id="searchCoursesByTutors" parameterType="hashmap" resultMap="CourseResult">
           SELECT * FROM COURSES
           <if test="tutorIds != null">
           <where>
           tutor_id IN
           <foreach item="tutorId" collection="tutorIds"
           open="(" separator="," close=")">
             #{tutorId}
           </foreach>
            </where>
            </if>
       </select>

 </mapper>

(3)StudentMapper.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="com.mybatis3.mappers.StudentMapper">

     <resultMap type="Student" id="StudentResult">
         <id     property="studId" column="stud_id"/>
         <result property="name" column="name" />
         <result property="email" column="email"/>
         <result property="phone" column="phone"/>
     </resultMap>

       <resultMap type="Student" id="StudentWithAddressExtResult" extends="StudentResult">
         <result property="address.addrId" column="addr_id"/>
         <result property="address.street" column="street"/>
         <result property="address.city" column="city"/>
         <result property="address.state" column="state"/>
         <result property="address.zip" column="zip"/>
         <result property="address.country" column="country"/>
     </resultMap>

       <resultMap type="Student" id="StudentWithAddressNestedSelect">
         <id     property="studId" column="stud_id"/>
         <result property="name" column="name"/>
         <result property="email" column="email"/>
         <association property="address" column="addr_id" select="com.mybatis3.mappers.AddressMapper.selectAddressById"/>
     </resultMap>

     <resultMap type="Student" id="StudentWithAddressNestedResultMap">
         <id     property="studId" column="stud_id"/>
         <result property="name" column="name"/>
         <result property="email" column="email"/>
         <association property="address" javaType="Address">
             <id property="addrId" column="addr_id"/>
             <result property="street" column="street"/>
             <result property="city" column="city"/>
             <result property="state" column="state"/>
             <result property="zip" column="zip"/>
             <result property="country" column="country"/>
         </association>
     </resultMap>

     <select id="findAllStudents" resultMap="StudentResult">
         select * from Students
       </select>

       <select id="findStudentById" parameterType="int" resultMap="StudentWithAddressNestedSelect">
         select * from Students where stud_id=#{studId}
       </select>

       <select id="selectStudentWithAddress" parameterType="int" resultMap="StudentWithAddressNestedResultMap">
           select stud_id, name, email,phone, a.addr_id, street, city, state, zip, country
           FROM students s left outer join addresses a on s.addr_id=a.addr_id
         where stud_id=#{studId}
       </select>

       <insert id="insertStudent" parameterType="Student" useGeneratedKeys="true" keyProperty="studId">
           insert into students(name,email,addr_id, phone)
           values(#{name},#{email},#{address.addrId},#{phone})
       </insert>

       <insert id="insertStudentWithMap" parameterType="hashmap" useGeneratedKeys="true" keyProperty="studId">
           insert into students(name,email,addr_id,phone)
           values(#{name},#{email},#{address.addrId},#{phone})
       </insert>

       <update id="updateStudent" parameterType="Student">
           update students
           <!-- set
           name=#{name},
           email=#{email},
           phone=#{phone}
           where stud_id=#{studId} -->

           <set>
               <if test="name != null">name=#{name},</if>
               <if test="email != null">email=#{email},</if>
               <if test="phone != null">phone=#{phone},</if>
           </set>
           where stud_id=#{studId}
       </update>

       <delete id="deleteStudent" parameterType="int">
           delete from students where stud_id=#{studId}
       </delete>

 </mapper>

(4)TutorMapper.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="com.mybatis3.mappers.TutorMapper">

       <resultMap type="Tutor" id="TutorWithCoursesNestedResult">
           <id     column="tutor_id" property="tutorId"/>
           <result column="tutor_name" property="name"/>
           <result column="email" property="email"/>
           <association property="address" resultMap="com.mybatis3.mappers.AddressMapper.AddressResult"/>
           <collection property="courses"  resultMap="com.mybatis3.mappers.CourseMapper.CourseResult"  />
       </resultMap>

       <resultMap type="Tutor" id="TutorWithCoursesNestedSelect">
           <id     column="tutor_id" property="tutorId"/>
           <result column="tutor_name" property="name"/>
           <result column="email" property="email"/>
           <association property="address" resultMap="com.mybatis3.mappers.AddressMapper.AddressResult"/>
           <collection property="courses"  column="tutor_id" select="com.mybatis3.mappers.CourseMapper.selectCoursesByTutor"/>
       </resultMap>

       <select id="selectTutorById" parameterType="int" resultMap="TutorWithCoursesNestedResult">
           SELECT t.tutor_id, t.name as tutor_name, email, a.addr_id, street, city, state, zip, country,
                    course_id, c.name, description, start_date, end_date
         FROM tutors t left outer join addresses a on t.addr_id=a.addr_id
           left outer join courses c on t.tutor_id=c.tutor_id
         where t.tutor_id=#{tutorId}
       </select>

       <select id="selectTutorWithCourses" parameterType="int" resultMap="TutorWithCoursesNestedSelect">
           SELECT t.tutor_id, t.name as tutor_name, email, a.addr_id, street, city, state, zip, country
         FROM tutors t left outer join addresses a on t.addr_id=a.addr_id
         where t.tutor_id=#{tutorId}
       </select>

 </mapper>

(5)mybatis-config.xml

 <?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE configuration
   PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
   "http://mybatis.org/dtd/mybatis-3-config.dtd">
 <configuration>

     <properties resource="application.properties" />

     <typeAliases>
         <package name="com.mybatis3.domain" />
     </typeAliases>

     <typeHandlers>
         <typeHandler handler="com.mybatis3.typehandlers.PhoneTypeHandler" />
     </typeHandlers>

     <environments default="development">
         <environment id="development">
             <transactionManager type="JDBC" />
             <dataSource type="POOLED">
                 <property name="driver" value="${jdbc.driverClassName}" />
                 <property name="url" value="${jdbc.url}" />
                 <property name="username" value="${jdbc.username}" />
                 <property name="password" value="${jdbc.password}" />
             </dataSource>
         </environment>

     </environments>

     <mappers>
         <package name="com.mybatis3.mappers"/>
     </mappers>

 </configuration>

6.测试文件