|
第七周 |
|
|
所花时间 |
25h左右 |
|
代码量 |
1500行左右 |
|
博客量 |
3篇 |
|
学到的知识点 |
spring中的自动装配，bean之间的关系，bean的作用域，引用外部属性文件 |
一、自动装配
package zidongpeizhi;
public class Address {
private String city;
private String home;
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getHome() {
return home;
}
public void setHome(String home) {
this.home = home;
}
@Override
public String toString() {
return "Address [city=" + city + ", home=" + home + "]";
}
}
Address
package zidongpeizhi;
public class Car {
private String name;
private double price;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
@Override
public String toString() {
return "Car [name=" + name + ", price=" + price + "]";
}
}
Car
package zidongpeizhi;
public class Person {
private String name;
private Car cars;
private Address address;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Car getCars() {
return cars;
}
public void setCars(Car cars) {
this.cars = cars;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
@Override
public String toString() {
return "Person [name=" + name + ", cars=" + cars + ", address=" + address + "]";
}
}
Person
package zidongpeizhi;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import zidongpeizhi.Person;
public class Main {
public static void main(String[] args) {
ApplicationContext c=new ClassPathXmlApplicationContext("zidongpeizhi.xml");
Person pe=(Person) c.getBean("person");
System.out.println(pe);
}
}
Main
<?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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="address" class="zidongpeizhi.Address" p:city="ningxia"
p:home="guang"></bean>
<bean id="car" class="zidongpeizhi.Car" p:name="dazhong"
p:price="60"></bean>
<!--
<bean id="person" class="zidongpeizhi.Person" p:name="tom"
p:address-ref="address" p:cars-ref="car"></bean>
-->
<!--byname 匹配javabean里的setter
<bean id="person" class="zidongpeizhi.Person" p:name="tom"
autowire="byName"></bean>
-->
<!-- bytype ioc容器只能有一个匹配 -->
<bean id="person" class="zidongpeizhi.Person" p:name="mmom"
autowire="byType"></bean>
</beans>
.xml
二、bean之间的关系
<?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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- 设置abstract="true"属性，只能被继承 -->
<bean id="address" p:city="beijing" p:home="z" abstract="true">
</bean>
<!-- 继承address -->
<bean id="address1" class="beanguanxi.Address" p:city="beijing"
parent="address">
</bean>
<!-- 依赖 -->
<bean id="car" class="beanguanxi.Car" p:name="baoma"
p:price="100"></bean>
<bean id="person" class="beanguanxi.Person" p:name="tom"
p:address-ref="address1" depends-on="car">
</bean>
</beans>
beanguanxi.xml
三、引用外部属性文件
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!-- 导入外部文件 -->
<context:property-placeholder location="classpath:mysql"/>
<bean id="datasource"
class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="${user}"></property>
<property name="password" value="${password}"></property>
<property name="driverClass" value="${driverclass}"></property>
<property name="jdbcUrl" value="${jdbcurl}"></property>
</bean>
<!--
<bean id="datasource"
class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="root"></property>
<property name="password" value="123456"></property>
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///mmm"></property>
</bean>
-->
</beans>
shujuyuan.xml
user=root password=123456 driverclass=com.mysql.jdbc.Driver jdbcurl=jdbc:mysql:///mmm
mysql.txt
package shujuyuan;
import java.sql.SQLException;
import javax.sql.DataSource;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Main {
public static void main(String[] args) {
ApplicationContext c=new ClassPathXmlApplicationContext("shujuyuan.xml");
DataSource datasource =(DataSource) c.getBean("datasource");
try {
System.out.println(datasource.getConnection());
} catch (SQLException e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
}
Main
原文地址：https://www.cnblogs.com/MoooJL/p/12633857.html
时间： 2024-07-31 23:08:47