Spring|JDBC框架
本文内容纲要：Spring|JDBC框架
在使用普通的JDBC数据库时，就会很麻烦的写不必要的代码来处理异常、打开和关闭数据库连接等。但 Spring JDBC 框架负责所有的底层细节，从开始打开连接、准备和执行 SQL 语句、处理异常、处理事务到最后关闭连接。
举一个简单的JdbcTemplate应用的例子，以后再进行详细说明。
【举例】
数据库：sqlserver
CREATE TABLE [dbo].[Student]( [id] [int] IDENTITY(1,1) NOT NULL,
[name] [varchar](20) NOT NULL,
[age] [int] NOT NULL
)
pom.xml
<?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>com.my</groupId>
<artifactId>SpringStudy</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<spring.version>4.1.6.RELEASE</spring.version>
</properties>
<dependencies>
<!--spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- AspectJ -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.6.11</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.11</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.1</version>
</dependency>
<!--c3p0-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>sqljdbc4</artifactId>
<version>4.0</version>
</dependency>
</dependencies>
</project>
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"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd ">
<!-- Initialization for data source -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 使用外部属性文件的属性 -->
<property name="user" value="sa"></property>
<property name="password" value="123"></property>
<property name="driverClass" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
<property name="jdbcUrl" value="jdbc:sqlserver://localhost:1433;DatabaseName=TEST"></property>
<property name="initialPoolSize" value="5"></property>
<property name="maxPoolSize" value="10"></property>
</bean>
<!--Definition for studentJDBCTemplate bean-->
<bean id="studentJDBCTemplate" class="com.my.StudentJDBCTemplate">
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
程序：
package com.my;/**
* @Author jyy
* @Description {}
* @Date 2018/8/8 16:40
*/
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;
}
}
package com.my;
import javax.sql.DataSource;
import java.util.List;
/**
* @Author jyy
* @Description {}
* @Date 2018/8/8 16:39
*/
public interface StudentDAO {
/**
* This is the method to be used to initialize
* database resources ie. connection.
*/
public void setDataSource(DataSource ds);
/**
* This is the method to be used to create
* a record in the Student table.
*/
public void create(String name, Integer age);
/**
* This is the method to be used to list down
* a record from the Student table corresponding
* to a passed student id.
*/
public Student getStudent(Integer id);
/**
* This is the method to be used to list down
* all the records from the Student table.
*/
public List<Student> listStudents();
/**
* This is the method to be used to delete
* a record from the Student table corresponding
* to a passed student id.
*/
public void delete(Integer id);
/**
* This is the method to be used to update
* a record into the Student table.
*/
public void update(Integer id, Integer age);
}
package com.my;
import org.springframework.jdbc.core.JdbcTemplate;
import javax.sql.DataSource;
import java.util.List;
/**
* @Author jyy
* @Description {}
* @Date 2018/8/8 16:42
*/
public class StudentJDBCTemplate implements StudentDAO {
private DataSource dataSource;
private JdbcTemplate jdbcTemplateObject;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplateObject = new JdbcTemplate(dataSource);
}
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;
}
public Student getStudent(Integer id) {
String SQL = "select * from Student where id = ?";
Student student = jdbcTemplateObject.queryForObject(SQL,
new Object[]{id}, new StudentMapper());
return student;
}
public List<Student> listStudents() {
String SQL = "select * from Student";
List<Student> students = jdbcTemplateObject.query(SQL,
new StudentMapper());
return students;
}
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;
}
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;
}
}
package com.my;
import org.springframework.jdbc.core.RowMapper;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* @Author jyy
* @Description {}
* @Date 2018/8/8 16:41
*/
public class StudentMapper implements RowMapper<Student> {
public Student mapRow(ResultSet rs, int rowNum) throws SQLException {
Student student = new Student();
student.setId(rs.getInt("id"));
student.setName(rs.getString("name"));
student.setAge(rs.getInt("age"));
return student;
}
}
package com.my;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import javax.sql.DataSource;
import java.util.List;
/**
* @Author jyy
* @Description {}
* @Date 2018/7/13 10:06
*/
public class MainApp {
@Autowired
static DataSource dataSource;
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());
}
}
输出结果：
------Records Creation--------Created Record Name = Zara Age = 11
Created Record Name = Nuha Age = 2
Created Record Name = Ayan Age = 15
------Listing Multiple Records--------
ID : 1, Name : Zara, Age : 11
ID : 2, Name : Nuha, Age : 20
ID : 3, Name : Ayan, Age : 15
ID : 4, Name : Zara, Age : 11
ID : 5, Name : Nuha, Age : 2
ID : 6, Name : Ayan, Age : 15
----Updating Record with ID = 2 -----
Updated Record with ID = 2
----Listing Record with ID = 2 -----
ID : 2, Name : Nuha, Age : 20
本文内容总结：Spring|JDBC框架
原文链接：https://www.cnblogs.com/maikucha/p/9444286.html
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