Spring的JDBC示例

以下内容引用自http://wiki.jikexueyuan.com/project/spring/jdbc-framework-overview/spring-jdbc-example.html：

实现前提：

1、在MySql上新建数据库并导入相关数据，脚本如下：

--
-- 数据库: `test`
--

-- --------------------------------------------------------

--
-- 表的结构 `student`
--

CREATE TABLE IF NOT EXISTS `student` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  `NAME` varchar(20) NOT NULL,
  `AGE` int(11) NOT NULL,
  PRIMARY KEY (`ID`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=10 ;

--
-- 转存表中的数据 `student`
--

INSERT INTO `student` (`ID`, `NAME`, `AGE`) VALUES
(1, 'Zara', 11),
(2, 'Nuha', 2),
(3, 'Ayan', 15);

2、由于是操作MySql，所以还需要mysql-connector-java.jar包：

    <!-- mysql-connector-java -->
    <!-- http://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>6.0.6</version>
    </dependency>    

实践例子：

pom.xml：

<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>com.jsoft.testspring</groupId>
  <artifactId>testjdbc</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>testjdbc</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>

    <!-- Spring Core -->
    <!-- http://mvnrepository.com/artifact/org.springframework/spring-core -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.1.4.RELEASE</version>
    </dependency>

    <!-- Spring Context -->
    <!-- http://mvnrepository.com/artifact/org.springframework/spring-context -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.1.4.RELEASE</version>
    </dependency>

    <!-- Spring JDBC -->
    <!-- http://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>4.1.4.RELEASE</version>
    </dependency>

    <!-- Spring Transaction -->
    <!-- http://mvnrepository.com/artifact/org.springframework/spring-tx -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>4.1.4.RELEASE</version>
    </dependency>

    <!-- mysql-connector-java -->
    <!-- http://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>6.0.6</version>
    </dependency>    

  </dependencies>
</project>

Student.java：

package com.jsoft.testspring.testjdbc;

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

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

    public Integer getAge() {
        return age;
    }

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

    public String getName() {
        return name;
    }

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

    public Integer getId() {
        return id;
    }
}

StudentDAO.java：

package com.jsoft.testspring.testjdbc;

import java.util.List;
import javax.sql.DataSource;

public interface StudentDAO {

    public void setDataSource(DataSource ds);

    public void create(String name, Integer age);

    public Student getStudent(Integer id);

    public List<Student> listStudents();

    public void delete(Integer id);

    public void update(Integer id, Integer age);
}

StudentMapper.java：

package com.jsoft.testspring.testjdbc;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

public class StudentMapper implements RowMapper<Student> {

    @Override
    public Student mapRow(ResultSet rs, int arg1) throws SQLException {
        // TODO Auto-generated method stub
        Student student = new Student();
        student.setId(rs.getInt("id"));
        student.setName(rs.getString("name"));
        student.setAge(rs.getInt("age"));
        return student;
    }

}

提示：此类的作用是通过一行数据返回一个Student的对象。

StudentJDBCTemplate.java：

package com.jsoft.testspring.testjdbc;

import java.util.List;

import javax.sql.DataSource;

import org.springframework.jdbc.core.JdbcTemplate;

public class StudentJDBCTemplate implements StudentDAO {

    private DataSource dataSource;
    private JdbcTemplate jdbcTemplateObject;

    @Override
    public void setDataSource(DataSource dataSource) {
        this.dataSource = dataSource;
        this.jdbcTemplateObject = new JdbcTemplate(dataSource);
    }

    @Override
    public void create(String name, Integer age) {
        String SQL = "insert into Student (name, age) values (?, ?)";
        jdbcTemplateObject.update(SQL, name, age);
        System.out.println("Created Record Name = " + name + " Age = " + age);
        return;
    }

    @Override
    public Student getStudent(Integer id) {
        String SQL = "select * from Student where id = ?";
        Student student = jdbcTemplateObject.queryForObject(SQL, new Object[] { id }, new StudentMapper());
        return student;
    }

    @Override
    public List<Student> listStudents() {
        String SQL = "select * from Student";
        List<Student> students = jdbcTemplateObject.query(SQL, new StudentMapper());
        return students;
    }

    @Override
    public void delete(Integer id) {
        String SQL = "delete from Student where id = ?";
        jdbcTemplateObject.update(SQL, id);
        System.out.println("Deleted Record with ID = " + id);
        return;
    }

    @Override
    public void update(Integer id, Integer age) {
        String SQL = "update Student set age = ? where id = ?";
        jdbcTemplateObject.update(SQL, age, id);
        System.out.println("Updated Record with ID = " + id);
        return;
    }

}

提示：通过继承DAO接口实现相关方法。

beans.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.xsd">

   <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
      <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
      <property name="url" value="jdbc:mysql://localhost:3306/test?serverTimezone=UTC"/>
      <property name="username" value="root"/>
      <property name="password" value="root"/>
   </bean>

   <!-- Definition for studentJDBCTemplate bean -->
   <bean id="studentJDBCTemplate" class="com.jsoft.testspring.testjdbc.StudentJDBCTemplate">
      <property name="dataSource"  ref="dataSource" />
   </bean>

</beans>

App.java：

package com.jsoft.testspring.testjdbc;

import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * Hello world!
 *
 */
public class App {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        StudentJDBCTemplate studentJDBCTemplate = (StudentJDBCTemplate) context.getBean("studentJDBCTemplate");
        System.out.println("------Records Creation--------");
        studentJDBCTemplate.create("Zara", 11);
        studentJDBCTemplate.create("Nuha", 2);
        studentJDBCTemplate.create("Ayan", 15);
        System.out.println("------Listing Multiple Records--------");
        List<Student> students = studentJDBCTemplate.listStudents();
        for (Student record : students) {
            System.out.print("ID : " + record.getId());
            System.out.print(", Name : " + record.getName());
            System.out.println(", Age : " + record.getAge());
        }
        System.out.println("----Updating Record with ID = 2 -----");
        studentJDBCTemplate.update(2, 20);
        System.out.println("----Listing Record with ID = 2 -----");
        Student student = studentJDBCTemplate.getStudent(2);
        System.out.print("ID : " + student.getId());
        System.out.print(", Name : " + student.getName());
        System.out.println(", Age : " + student.getAge());
    }
}

测试结果：

测试工程：https://github.com/easonjim/5_java_example/tree/master/springtest/test17/testjdbc