开发流程之二（DAO及dao层的测试）

　　这是开发六步第二部，写dao层。
　　首先dao层实在model层之上建立的，我重复一下之前创建的表代码，在id上和hobby字段上改了之前的long 为String ，String[]数组为 String。
1.Model 层的Studentsinf代码为：

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

import org.hibernate.annotations.OptimisticLockType;

/**
 * Java Persistence API定义了一种定义，可以将常规的普通Java对象（有时被称作POJO）映射到数据库。
 *      这些普通Java对象被称作Entity Bean
 *
 * @Entity说明这个class是实体类，并且使用默认的orm规则，即
 *          class名            --->    数据库表中表名，
 *          class字段名    --->    表中的字段名
 *     
 * 如果想改变这种默认的orm规则，就要使用@Table来改变class名与数据库中表名的映射规则，
 *          @Table(name = "T_TEXT_TRANING_COMPANY") ,name 后面的是表名
 *          @id表示主键
 *          @Column来改变   class中字段名 ---->db中表的字段名          的映射规则
 */


@Entity
@Table(name="T_TRAINING_CHEN_STUDENTS")
@org.hibernate.annotations.Entity(optimisticLock = OptimisticLockType.VERSION)
public class Studentsinf {
     private static final long serialVersionUID = -2861741637268711367L;

    /**
     * ID
     */
    private String id;

    /**
     * 名字
     */
    private String name;

    /**
     * 年龄
     */
    private int age;

    /**
     * 性别
     */
    private String legend;

    /**
     * 省份
     */
    private String province;

    /**
     * 组别
     */
    private String team;

    /**
     * 爱好
     */
    private String hobby;


    @Id
    @Column(name = "ID")
    public String getId() {
        return id;
    }

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

    @Column(name = "name")
    public String getName(){
        return name;
    }


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

    @Column(name = "age")
    public int getAge(){
        return age;
    }


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

    @Column(name = "legend")
    public String getLegend(){
        return legend;
    }


    public void setLegend(String legend){
        this.legend = legend;
    }

    @Column(name = "province")
    public String getProvince(){
        return province;
    }

    public void setProvince(String province){
        this.province = province;
    }

    @Column(name = "team")
    public String getTeam(){
        return team;
    }

    public void setTeam(String team){
        this.team = team;
    }

    @Column(name = "hobby")
    public String getHobby(){
        return hobby;
    }

    public void setHobby(String hobby){
        this.hobby = hobby;
    }

    @Override
    public String toString(){
        return "Studentsinf [id=" + id + ", name=" + name + ", age=" + age + ", legend=" + legend + ", province=" + province + ", team=" + team + ", hobby=" + hobby + "]";
    }
}

2.Dao层创建查询的方法，代码为：

public interface StudentsinfDao extends GenericEntityDao<Studentsinf, Long>{

    /**   查询所有的学生信息   */
    @NativeQuery(model = Studentsinf.class)
    List<Studentsinf> findAllStudentsinf();

    /**   根据id查询学生信息  */
    @NativeQuery(model = Studentsinf.class)
    Studentsinf findStudentsinfById(@QueryParam("id") String id);
}

3.写数据库语句

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

    <bean id="Studentsinf.findAllStudentsinf"  class="根据自己路径设置">
        <description> 找到所有的Students的信息</description>
        <constructor-arg>
            <value>
                <![CDATA[
                    select *
                    from t_training_chen_students
                ]]>
            </value>
        </constructor-arg>
    </bean>

    <bean id="Studentsinf.findStudentsinfById" class="loxia.dao.support.DynamicQueryHolder">
        <description>通过ID查询Students的信息</description>
        <constructor-arg>
            <value>
                <![CDATA[
                    select *
                    from t_training_chen_students
                    where id = :id
                ]]>
            </value>
        </constructor-arg>
    </bean>



</beans>

4.对dao层进行测试

public class StudentsinfDaoTest extends BaseTransactionalJUnit4SpringContextTests{
    private static final Logger LOGGER = LoggerFactory.getLogger(StudentsinfDaoTest.class);

    @Autowired
    private StudentsinfDao studentsinf;

    @Test
    public void testFindAllStudentsinf() {
        List<Studentsinf> list = studentsinf.findAllStudentsinf();
        Studentsinf si = null;
        LOGGER.info("-----------------------  开始测试  -----------------------");
        for(int i = 0; i < list.size(); i++) {
            si = list.get(i);
            LOGGER.debug("" + JSON.toJSONString(si));
            LOGGER.debug("--" + si.toString());

        }
        LOGGER.info("-----------------------  结束测试  -----------------------");
    }

    @Test
    public void testFindStudentsinfById() {
        Studentsinf sinf = studentsinf.findStudentsinfById("JMSH10393");
        LOGGER.info("-----------------------  开始测试  -----------------------");
        LOGGER.debug("" + JSON.toJSONString(sinf));
        LOGGER.info("-----------------------  结束测试  -----------------------");
    }
}