Spring(十五)之声明式事务

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

package com.tutorialspoint; public class StudentMarks { private Integer age; private String name; private Integer id; private Integer marks; private Integer year; private Integer sid; 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; } public void setMarks(Integer marks) { this.marks = marks; } public Integer getMarks() { return marks; } public void setYear(Integer year) { this.year = year; } public Integer getYear() { return year; } public void setSid(Integer sid) { this.sid = sid; } public Integer getSid() { return sid; } }

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 and Marks tables. */ public void create(String name, Integer age, Integer marks, Integer year); /** * This is the method to be used to list down * all the records from the Student and Marks tables. */ public List<StudentMarks> listStudents(); }

package com.tutorialspoint; import java.sql.ResultSet; import java.sql.SQLException; import org.springframework.jdbc.core.RowMapper; public class StudentMarksMapper implements RowMapper<StudentMarks> { public StudentMarks mapRow(ResultSet rs, int rowNum) throws SQLException { StudentMarks studentMarks = new StudentMarks(); studentMarks.setId(rs.getInt("id")); studentMarks.setName(rs.getString("name")); studentMarks.setAge(rs.getInt("age")); studentMarks.setSid(rs.getInt("sid")); studentMarks.setMarks(rs.getInt("marks")); studentMarks.setYear(rs.getInt("year")); return studentMarks; } }

package com.tutorialspoint; import java.util.List; import javax.sql.DataSource; import org.springframework.dao.DataAccessException; import org.springframework.jdbc.core.JdbcTemplate; public class StudentJDBCTemplate implements StudentDAO{ private JdbcTemplate jdbcTemplateObject; public void setDataSource(DataSource dataSource) { this.jdbcTemplateObject = new JdbcTemplate(dataSource); } public void create(String name, Integer age, Integer marks, Integer year){ try { String SQL1 = "insert into Student (name, age) values (?, ?)"; jdbcTemplateObject.update( SQL1, name, age); // Get the latest student id to be used in Marks table String SQL2 = "select max(id) from Student"; int sid = jdbcTemplateObject.queryForInt( SQL2 ); String SQL3 = "insert into Marks(sid, marks, year) " + "values (?, ?, ?)"; jdbcTemplateObject.update( SQL3, sid, marks, year); System.out.println("Created Name = " + name + ", Age = " + age); // to simulate the exception. throw new RuntimeException("simulate Error condition") ; } catch (DataAccessException e) { System.out.println("Error in creating record, rolling back"); throw e; } } public List<StudentMarks> listStudents() { String SQL = "select * from Student, Marks where Student.id=Marks.sid"; List <StudentMarks> studentMarks=jdbcTemplateObject.query(SQL, new StudentMarksMapper()); return studentMarks; } }

<?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:tx="http://www.springframework.org/schema/tx" 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/tx http://www.springframework.org/schema/tx/spring-tx-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="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/TEST"/> <property name="username" value="root"/> <property name="password" value="1234"/> </bean> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="create"/> </tx:attributes> </tx:advice> <aop:config> <aop:pointcut id="createOperation" expression="execution(* com.tutorialspoint.StudentJDBCTemplate.create(..))"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="createOperation"/> </aop:config> <!-- Initialization for TransactionManager --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- Definition for studentJDBCTemplate bean --> <bean id="studentJDBCTemplate" class="com.tutorialspoint.StudentJDBCTemplate"> <property name="dataSource" ref="dataSource" /> </bean> </beans>

package com.tutorialspoint; import java.util.List; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class MainApp { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml"); StudentDAO studentJDBCTemplate = (StudentDAO)context.getBean("studentJDBCTemplate"); System.out.println("------Records creation--------" ); studentJDBCTemplate.create("Zara", 11, 99, 2010); studentJDBCTemplate.create("Nuha", 20, 97, 2010); studentJDBCTemplate.create("Ayan", 25, 100, 2011); System.out.println("------Listing all the records--------" ); List<StudentMarks> studentMarks = studentJDBCTemplate.listStudents(); for (StudentMarks record : studentMarks) { System.out.print("ID : " + record.getId() ); System.out.print(", Name : " + record.getName() ); System.out.print(", Marks : " + record.getMarks()); System.out.print(", Year : " + record.getYear()); System.out.println(", Age : " + record.getAge()); } } }