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spring(3) JDBC

2024-08-10 07:24:19   226人阅读

StepDescription
1Create a project with a name SpringExample and create a package com.tutorialspoint under the src folder in the created project.
2Add required Spring libraries using Add External JARs option as explained in the Spring Hello World Example chapter.
3Add Spring JDBC specific latest libraries mysql-connector-java.jar, org.springframework.jdbc.jar and org.springframework.transaction.jar in the project. You can download required libraries if you do not have them already.
4Create DAO interface StudentDAO and list down all the required methods. Though it is not required and you can directly write StudentJDBCTemplate class, but as a good practice, let‘s do it.
5Create other required Java classes Student, StudentMapper, StudentJDBCTemplate and MainApp under the com.tutorialspoint package.
6Make sure you already created Student table in TEST database. Also make sure your MySQL server is working fine and you have read/write access on the database using the give username and password.
7Create Beans configuration file Beans.xml under the src folder.
8The final step is to create the content of all the Java files and Bean Configuration file and run the application as explained below.

 上面介绍了怎样将JDBC与Spring进行整合的步骤，下面给出实例

Following is the content of the Data Access Object interface file StudentDAO.java:

package com.tutorialspoint;import java.util.List;import javax.sql.DataSource;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);}

 

Following is the content of the Student.java file:

package com.tutorialspoint;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;   }}

 Following is the content of the StudentMapper.java file

package com.tutorialspoint;import java.sql.ResultSet;import java.sql.SQLException;import org.springframework.jdbc.core.RowMapper;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;   }}

 

Following is the implementation class file StudentJDBCTemplate.java for the defined DAO interface StudentDAO:

package com.tutorialspoint;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;      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;   }}

 

Following is the content of the MainApp.java file:

package com.tutorialspoint;import java.util.List;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.tutorialspoint.StudentJDBCTemplate;public class MainApp {   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());	     }}

 

Following is the configuration file 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-3.0.xsd ">   <!-- Initialization for data source -->   <bean id="dataSource"       class="org.springframework.jdbc.datasource.DriverManagerDataSource">      <property name="driverClassName" value="http://www.mamicode.com/com.mysql.jdbc.Driver"/>      <property name="url" value="http://www.mamicode.com/jdbc:mysql://localhost:3306/TEST"/>      <property name="username" value="http://www.mamicode.com/root"/>      <property name="password" value="http://www.mamicode.com/password"/>   </bean>   <!-- Definition for studentJDBCTemplate bean -->   <bean id="studentJDBCTemplate"       class="com.tutorialspoint.StudentJDBCTemplate">      <property name="dataSource"  ref="dataSource" />       </bean>      </beans>

 其中的主要部分就是红色字体标注的部分。

另外，实现文中代码的表为

CREATE TABLE Student(
   ID   INT NOT NULL AUTO_INCREMENT,
   NAME VARCHAR(20) NOT NULL,
   AGE  INT NOT NULL,
   PRIMARY KEY (ID)
);

文章代码来自于:

http://www.tutorialspoint.com/spring/spring_jdbc_example.htm

 

spring(3) JDBC


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