Ibatis学习三. Spring整合Ibatis -

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Ibatis学习三. Spring整合Ibatis

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Ibatis

Java Ibatis Spring

一.Spring整合iBatis原理

Apache iBatis是当前IT项目中使用很广泛的一个半自动ORM框架，区别于Hibernate之类的全自动框架，iBatis对数据库的操作拥有更加灵活的控制，对于那些经常需要调用本地数据库函数自定义SQL语句，或是喜欢自己优化SQL执行效率的开发者来说，iBatis是一个非常不错的选择。而得到广泛应用的开源企业架构SpringFramework，也很好的将其进行了集成，使得iBatis在 SpringFramework中的使用更加便利、快捷。

开发者所要做的就是继承SpringFramework中提供的 SqlMapClientDaoSupport类即可。

1、SqlMapClientFactoryBean 的装配

SqlMapClientFactoryBean是SqlMapClientTemplate使用的基础，如果在SpringFramework应用中没有装配SqlMapClientFactoryBean，那么SqlMapClientTemplate将不可用，报空指针错误。

<bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">

    <property name="configLocation" value="/WEB-INF/sqlmap-config.xml"/>      
    <!-- iBatis sqlmap config 文件位置 -->

    <property name="dataSource" ref="dataSource"/> 
    <!-- 在SpringFramework配置文件中使用的数据源 -->

    <property name="lobHandler" ref="oracleLobHandler"/> 
    <!-- 如果需要读写Lob字段，需要注入在SpringFramework配置文件中配置好的Handler，-->
    <!-- 这里是Oracle的数据库 -->

</bean>

2、继承使用SqlMapClientDaoSupport类

声明Java类：

......

    import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport;

    ......

    public class ReportDAOImpl extends SqlMapClientDaoSupport {

        ......

    }

SpringFramework配置文件中装配Java类：

<bean id="reportDao" class="com.test.dao.ReportDAOImpl">

    <property name="sqlMapClient" ref="sqlMapClient"/> 
    <!-- 装配SqlMapClientFactoryBean -->

</bean>

3、使用SqlMapClientTemplate查询

当执行没有参数的查询时：

List result = getSqlMapClientTemplate().queryForList("TestSpace.qryTest");
//"TestSpace"为iBatis SqlMap文件的命名空间；"qryTest"为iBatis SqlMap的查询方法id

当按照主键获取某条记录信息时：

Long id = new Long("2");
Object resultObj = getSqlMapClientTemplate().queryForObject("TestSpace.getTest", id);

当按照某些条件查询时：

ObjectA objA = new ObjectA();

objA.setParam1("test1");

objA.setParam2("test2");

    ......

List result = getSqlMapClientTemplate().queryForList("TestSpace.qryTestByParam", objA);

如果需要取4~40条数据：

List result = getSqlMapClientTemplate().queryForList("TestSpace.qryTestByParam", objA, 4, 40);

也可以返回Map

Map result = getSqlMapClientTemplate().queryForMap("TestSpace.qryTestByParam", objA, "MapKey");

4、使用SqlMapClientTemplate添加数据

    ObjectA objA = new ObjectA();

    objA.setParam1("test1");

    objA.setParam2("test2");

    ......

    getSqlMapClientTemplate().insert("TestSpace.insertTest", objA);

5、使用SqlMapClientTemplate更新数据

    ObjectA objA = new ObjectA();

    objA.setParam1("test1");

    objA.setParam2("test2");

    ......

    getSqlMapClientTemplate().update("TestSpace.updateTest", objA);

    更新前20条记录：

    getSqlMapClientTemplate().update("TestSpace.updateTest", objA, 20);

6、使用SqlMapClientTemplate删除数据

    Long id = new Long("2");

    getSqlMapClientTemplate().delete("TestSpace.deleteTest", id);

二.实例分析

1.Pom文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>Ibatis</groupId>
    <artifactId>Ibatis</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <spring-version>3.0.6.RELEASE</spring-version>
    </properties>

    <dependencies>
        <!--Junti-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <!--Spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring-version}</version>
        </dependency>
        <!--Ibatis-->
        <dependency>
            <groupId>org.apache.ibatis</groupId>
            <artifactId>ibatis-sqlmap</artifactId>
            <version>2.3.4.726</version>
        </dependency>
        <!--dbcp-->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.27</version>
        </dependency>
        <!--log4j-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.5</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.5.1</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

2.applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

    <import resource="spring-ibatis.xml"/>

</beans>

3.spring-ibatis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <!-- spring 读取配置文件 -->
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations" value="jdbc.properties" />
    </bean>

    <!--设置BasicDataSource连接池，须导入commons-dbcp包-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="${db.driver}" />
        <property name="url" value="${db.url}" />
        <property name="username" value="${db.username}" />
        <property name="password" value="${db.password}" />
        <property name="initialSize" value="${db.initialPoolSize}" />
        <property name="maxActive" value="${db.maxPoolSize}" />
        <property name="maxWait" value="${db.maxIdleTime}" />
    </bean>

    <!--配置c3p0连接池，须导入c3p0包-->
    <bean id="dataSource_c3p0" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <property name="driverClass" value="${db.driver}"/>
        <property name="jdbcUrl" value="${db.url}"/>
        <property name="user" value="${db.username}"/>
        <property name="password" value="${db.password}"/>
        <property name="initialPoolSize" value="${db.initialPoolSize}"/>
        <property name="minPoolSize" value="${db.minPoolSize}"/>
        <property name="maxPoolSize" value="${db.maxPoolSize}"/>
        <property name="maxIdleTime" value="${db.maxIdleTime}"/>
    </bean>

    <!-- 此处应注入ibatis配置文件，而非sqlMap文件，否则会出现“there is no statement.....异常” -->
    <!-- 在此处引入数据库连接池的关联 -->
    <bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
        <property name="configLocation" value="sqlMapConfig.xml" />
        <property name="dataSource" ref="dataSource" />
    </bean>

    <bean id="studentDao" class="com.suishou.ibatis1.dao.StudentDaoImpl">
        <property name="sqlMapClient" ref="sqlMapClient" />
    </bean>

</beans>

4.jdbc.properties

db.driver=com.mysql.jdbc.Driver
db.url=jdbc:mysql://localhost:3306/ibatis?useUnicode=true&amp;characterEncoding=UTF-8
db.username=root
db.password=111111
db.initialPoolSize=10
db.minPoolSize=10
db.maxPoolSize=20
db.maxIdleTime=60

5.Student.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN" "http://ibatis.apache.org/dtd/sql-map-2.dtd" >
<sqlMap >
    <typeAlias type="com.suishou.ibatis1.entity.Student" alias="student"/>
    <!--<resultMap id="ibatisTest" class="student" >
        <result column="id" property="id" jdbcType="VARCHAR" />
        <result column="name" property="name" jdbcType="VARCHAR" />
    </resultMap>-->

    <!-- 获得全查询列表 -->
    <select id="getAllStudents" resultClass="student">
    select * from student
  </select>

    <!-- 根据用户名获得用户对象 -->
    <select id="getStudentByName" resultClass="student">
     select * from student where name=#value#
  </select>

    <!-- 根据id获得用户对象 -->
    <select id="getStudentById" resultClass="student">
     select * from student where id=#value#
  </select>

    <!-- 新增用户对象 -->
    <insert id="insertStudent" parameterClass="student">
      insert into student (id,name) values (#id#,#name#)
   </insert>

    <!-- 删除用户对象 -->
    <delete id="deleteStudent">
     delete from student where id=#value#
   </delete>

    <!-- 更新用户对象 -->
    <delete id="updateStudent" parameterClass="student">
      update student set name=#name# where id=#id#
   </delete>
</sqlMap>

6.log4j.properties

#定义根目录的输出级别和目的地
log4j.rootLogger=INFO, stdout1,stdout2

#设置输出目的地和输出样式
log4j.appender.stdout1=org.apache.log4j.ConsoleAppender
log4j.appender.stdout1.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout1.layout.ConversionPattern=%d %-5p %C.%M(%L) - %m%n

log4j.appender.stdout2=org.apache.log4j.FileAppender
log4j.appender.stdout2.File=d:/log00.html
log4j.appender.stdout2.layout=org.apache.log4j.HTMLLayout

#设置每个包的输出级别
#log4j.logger.com.ibatis=debug
#log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
#log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
#log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
#log4j.logger.java.sql.Connection=debug
##log4j.logger.java.sql.Statement=debug
#log4j.logger.java.sql.PreparedStatement=debug

7.Student实体类

public class Student {
    private int id;
    private String name;
    private int age;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

8.IStudentDao

public interface IStudentDao {
    void insert(Student student);   //增
    void delete(int id);            //删
    void update(Student student);   //改
    Student select(int id);         //查
    List<Student> selectAll();      //查询全部
}

9.StudentDaoImpl

public class StudentDaoImpl extends SqlMapClientDaoSupport implements IStudentDao {

    @Override
    public void insert(Student student) {
        getSqlMapClientTemplate().insert("insertStudent",student);
    }

    @Override
    public void delete(int id) {
        getSqlMapClientTemplate().delete("deleteStudent",id);
    }

    @Override
    public void update(Student student) {
        getSqlMapClientTemplate().update("updateStudent",student);
    }

    @Override
    public Student select(int id) {
        return (Student) getSqlMapClientTemplate().queryForObject("getStudentById",id);
    }

    @Override
    public List<Student> selectAll() {
        return getSqlMapClientTemplate().queryForList("getAllStudents");
    }
}

10.StudentService

public class StudentService {

    private static Logger logger = LoggerFactory.getLogger(StudentService.class);

    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        IStudentDao studentDao = (IStudentDao) ctx.getBean("studentDao");

        Student student = studentDao.select(6);
        logger.info("The Student is {}", student);
    }
}

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Java下载图片一. 通过字节流传输 | Ibatis学习二. SqlMapConfig.xml文件详细说 ...

2014-03-13 09:17
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