代碼倉庫：https://gitee.com/DerekAndroid/springone.git
參考：https://www.w3cschool.cn/wkspring/pesy1icl.html
spring入門
1.創建類和屬性，包含set方法
package com.tutorialspoint;
public class HelloWorld {
public String getMessage() {
System.out.println("Your Message : " + message);
return message;
}
public void setMessage(String message) {
this.message = message;
}
private String message;
}
2.Beans配置message
<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="helloWorld" class="com.tutorialspoint.HelloWorld">
<property name="message" value="Hello World!"/>
</bean>
<beans>
3使用
public class MainApp {
/**
* Application Context 是 BeanFactory 的子接口，也被成爲 Spring 上下文
*/
public static void main(String[] args) {
//spring入門helloWorld
ApplicationContext context = new ClassPathXmlApplicationContext("Beans.xml");
HelloWorld obj = (HelloWorld) context.getBean("helloWorld");
obj.getMessage();
// fileContext();
}
}
Spring基於設置函數注入
1,TextEditorSet ,通過setSpellChecker方法注入spellChecker類
package com.injection;
public class TextEditorSet {
private SpellCheckerSet spellChecker;
public void setSpellChecker(SpellCheckerSet spellChecker) {
System.out.println("Inside setSpellChecker." );
this.spellChecker = spellChecker;
}
public void spellCheck(){
spellChecker.checkSpelling();
}
}
2，創建spellChecker類
package com.injection;
public class SpellCheckerSet {
public SpellCheckerSet() {
System.out.println("Inside SpellCheckerSet constructor.");
}
public void checkSpelling() {
System.out.println("Inside checkSpelling.");
}
}
3，Beans配置
<!-- 基於設值函數的注入中，我們使用的是〈bean〉標籤中的〈property〉元素-->
<bean id="TextEditorSet" class="com.injection.TextEditorSet">
<property name="spellChecker" ref="SpellCheckerSet"/>
</bean>
<bean id="SpellCheckerSet" class="com.injection.SpellCheckerSet">
</bean>
4.使用
package com.injection;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MainInjection {
public static void main(String[] args) {
mainInjectionSet();
}
// 基於設值函數注入中的 Beans.xml 文件
private static void mainInjectionSet() {
System.out.println("基於設值函數注入中的 Beans.xml 文件");
ApplicationContext context =
new ClassPathXmlApplicationContext("Beans.xml");
TextEditorSet te= (TextEditorSet) context.getBean("TextEditorSet");
te.spellCheck();
}
}
Spring+JDBC+mysql使用
1.準備sql
CREATE TABLE Student(
ID INT NOT NULL AUTO_INCREMENT,
NAME VARCHAR(20) NOT NULL,
AGE INT NOT NULL,
PRIMARY KEY (ID)
);
2創建Student類
package com.mysql;
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;
}
}
3.核心代碼：創建JDBC類，通過xml的形式mysql配置文件注入+mysql事務文件注入
package com.mysql;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.DefaultTransactionDefinition;
import javax.sql.DataSource;
import java.util.List;
public class StudentJDBCTemplate implements StudentDAO {
private DataSource dataSource;
private JdbcTemplate jdbcTemplateObject;
private PlatformTransactionManager transactionManager;
public PlatformTransactionManager getTransactionManager() {
return transactionManager;
}
public void setTransactionManager(PlatformTransactionManager transactionManager) {
this.transactionManager = transactionManager;
}
@Override
public void setDataSource(DataSource ds) {
this.dataSource = ds;
jdbcTemplateObject = new JdbcTemplate(ds);
}
@Override
public void create(String name, Integer age) {
TransactionDefinition def = new DefaultTransactionDefinition();
TransactionStatus status = transactionManager.getTransaction(def);
try {
String SQL = "insert into Student (name, age) values (?, ?)";
jdbcTemplateObject.update(SQL, name, age);
System.out.println("Created Record Name = " + name + " Age = " + age);
//模擬測試異常代碼
// throw new RuntimeException("simulate Error condition") ;
// int a =1/0;
transactionManager.commit(status);
} catch (DataAccessException e) {
System.out.println("Error in creating record, rolling back");
transactionManager.rollback(status);
}
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;
}
}
注入：
<!-- mysql配置文件-->
<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/spring"/>
<property name="username" value="root"/>
<property name="password" value="123"/>
</bean>
<!-- mysql事務文件-->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="studentJDBCTemplate" class="com.mysql.StudentJDBCTemplate">
<!-- mysql配置文件注入-->
<property name="dataSource" ref="dataSource"/>
<!-- mysql事務文件注入-->
<property name="transactionManager" ref="transactionManager"/>
</bean>
使用
package com.mysql;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.List;
/**
Spring JDBC 示例
CREATE TABLE Student(
ID INT NOT NULL AUTO_INCREMENT,
NAME VARCHAR(20) NOT NULL,
AGE INT NOT NULL,
PRIMARY KEY (ID)
);
* );
*/
public class MainAppJDBC {
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());
}
}