spring 注入复杂数据

一、p空间注入

名称空间（通俗一点）：相同的属性不能再标签里出现两次，为了避免重复用名称空间在区分

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1、实现步骤

（1）先引入一个名称空间

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（2）在bean的配置里加p:属性名="值"

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2、代码

Person.java

package work.zhangdoudou.Property;

public class Person {
    private String pname;

    public String getPname() {
        return pname;
    }

    public void setPname(String pname) {
        this.pname = pname;
    }
    
}

配置文件applicationContext.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"
 xmlns:p="http://www.springframework.org/schema/p"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <!-- p名称空间注入 -->
    <bean id="person" class="work.zhangdoudou.Property.Person" p:pname="zhangsan"></bean>
   
</beans>

测试类 TestPerson.java

package work.zhangdoudou.test;

import static org.junit.Assert.*;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import work.zhangdoudou.Property.Person;;

public class TestPerson {

    @Test
    public void test() {
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        Person person= (Person)context.getBean("person");
        System.out.println(person.getPname());
    }

}

3、运行结果

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二、复杂数据注入

1、数组类型注入

UserArray.java

package work.zhangdoudou.Property;

public class UserArray {
    private String[] user;
    public void setUser(String[] user) {
        this.user = user;
    }
    public String[] getUser() {
        return user;
    }
}

配置文件applicationContext.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"
 xmlns:p="http://www.springframework.org/schema/p"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <!-- 注入数组 -->
    <bean id="userArray" class="work.zhangdoudou.Property.UserArray">
        <property name="user">
            <list>
                <value>zhangsan</value>
                <value>lisi</value>
                <value>wangwu</value>
            </list>
        </property>
    </bean> 
</beans>

测试类 TestArray .java

package work.zhangdoudou.test;

import static org.junit.Assert.*;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import work.zhangdoudou.Property.UserArray;

public class TestArray {

    @Test
    public void test() {
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        UserArray userArray= (UserArray)context.getBean("userArray");
        String [] user=userArray.getUser();
        for (int i = 0; i < user.length; i++) {
            System.out.println(user[i]);
        }
    }
}

运行结果

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2、list类型注入

UserList.java

package work.zhangdoudou.Property;

import java.util.List;

public class UserList {
        private List<String> user;
        public void setUser(List<String> user) {
            this.user = user;
        }
        public List<String> getUser() {
            return user;
        }
}

配置文件applicationContext.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"
 xmlns:p="http://www.springframework.org/schema/p"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <!-- 注入list -->
    <bean id="userList" class="work.zhangdoudou.Property.UserList">
        <property name="user">
            <list>
                <value>张三</value>
                <value>李四</value>
                <value>王五</value>
            </list>
        </property>
    </bean>
</beans>

测试类TestList.java

package work.zhangdoudou.test;

import static org.junit.Assert.*;

import java.util.List;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import work.zhangdoudou.Property.UserList;

public class TestList {

    @Test
    public void test() {
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        UserList userList= (UserList)context.getBean("userList");
        List<String> user=userList.getUser();
        for (String username : user) {
            System.out.println(username);
        }
    }
}

运行结果

image.png

3、map类型注入

UserMap.java

package work.zhangdoudou.Property;

import java.util.Map;

public class UserMap {
    private Map<String, String> user;
    public void setUser(Map<String, String> user) {
        this.user = user;
    }
    public Map<String, String> getUser() {
        return user;
    }
}

配置文件applicationContext.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"
 xmlns:p="http://www.springframework.org/schema/p"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <!-- 注入map -->
    <bean id="userMap" class="work.zhangdoudou.Property.UserMap">
        <property name="user">
            <map>
                <entry key="姓名" value="张三"></entry>
                <entry key="性别" value="男"></entry>
                <entry key="年龄" value="100"></entry>
            </map>
        </property>
    </bean>
</beans>

测试类TestMap.java

import java.util.Map;
import java.util.Set;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import work.zhangdoudou.Property.UserMap;

public class TestMap {

    @Test
    public void test() {
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        UserMap userMap= (UserMap)context.getBean("userMap");
        Map<String, String> user=userMap.getUser();
        Set<String> key=user.keySet();
        for (String k : key) {
            System.out.println(k+":"+user.get(k));
        }   
    }
}

运行结果

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4、properties类型注入

UserProperties.java

package work.zhangdoudou.c;

import java.util.Properties;

public class UserProperties {
    private Properties user;
    public void setUser(Properties user) {
        this.user = user;
    }
    public Properties getUser() {
        return user;
    }
}

配置文件applicationContext.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"
 xmlns:p="http://www.springframework.org/schema/p"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    <!-- 注入 Properties -->
    <bean id="userProperties" class="work.zhangdoudou.Property.UserProperties">
        <property name="user">
            <props>
                <prop key="username">manman</prop>
                <prop key="password">520</prop>
            </props>
        </property>
    </bean>
</beans>

测试类TestProperties.java

package work.zhangdoudou.test;

import static org.junit.Assert.*;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import work.zhangdoudou.Property.UserProperties;

public class TestProperties {

    @Test
    public void test() {
        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        UserProperties userProperties= (UserProperties)context.getBean("userProperties");
        System.out.println(userProperties.getUser());
    }
}

运行结果

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