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
