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spring 配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>
p命名空间注入,基于setter方法
在XML头部信息中添加p命名空间的配置信息:xmlns:p="http://www.springframework.org/schema/p"
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
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="customerBean" class="com.powernode.spring6.beans.Customer" p:name="zhangsan" p:age="20"/>
</beans>
public class Customer {
private String name;
private int age;
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Customer{" +
"name='" + name + ''' +
", age=" + age +
'}';
}
}
c命名空间注入,简化构造方法注入
需要在xml配置文件头部添加信息:xmlns:c="http://www.springframework.org/schema/c"
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:c="http://www.springframework.org/schema/c"
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="myTimeBean" class="com.powernode.spring6.beans.MyTime" c:year="1970" c:month="1" c:day="1"/>-->
<bean id="myTimeBean" class="com.powernode.spring6.beans.MyTime" c:_0="2008" c:_1="8" c:_2="8"/>
</beans>
public class MyTime {
private int year;
private int month;
private int day;
public MyTime(int year, int month, int day) {
this.year = year;
this.month = month;
this.day = day;
}
@Override
public String toString() {
return "MyTime{" +
"year=" + year +
", month=" + month +
", day=" + day +
'}';
}
}
util命名空间
使用util命名空间可以让配置复用
<?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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"><util:properties id="prop">
<prop key="driver">com.mysql.cj.jdbc.Driver</prop>
<prop key="url">jdbc:mysql://localhost:3306/spring</prop>
<prop key="username">root</prop>
<prop key="password">123456</prop>
</util:properties><bean id="dataSource1" class="com.powernode.spring6.beans.MyDataSource1">
<property name="properties" ref="prop"/>
</bean><bean id="dataSource2" class="com.powernode.spring6.beans.MyDataSource2">
<property name="properties" ref="prop"/>
</bean>
</beans>
public class MyDataSource1 {
private Properties properties;
public void setProperties(Properties properties) {
this.properties = properties;
}
@Override
public String toString() {
return "MyDataSource1{" +
"properties=" + properties +
'}';
}
}
public class MyDataSource2 {
private Properties properties;
public void setProperties(Properties properties) {
this.properties = properties;
}
@Override
public String toString() {
return "MyDataSource2{" +
"properties=" + properties +
'}';
}
}