Spring框架xml配置文件 复杂类型属性注入——数组 list map properties

Posted 2020-10-14 Advancing Swift

Person类中的各种属性写法如下：

package com.swift.person;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Properties;

public class Person {
　　//普通字符串
    private String name;
　　//字符串数组
    private String[] arr;
　　//字符串列表
    private List<String> list;
　　//键值对都为字符串的Map集合
    private Map<String,String> map;
    public void setMap(Map<String, String> map) {
        this.map = map;
    }
　　//这还有一个键值对的属性类
    private Properties properties;
    public void setName(String name) {
        this.name = name;
    }
    public void setArr(String[] arr) {
        this.arr = arr;
    }
    public void setList(List<String> list) {
        this.list = list;
    }
    public void setProperties(Properties properties) {
        this.properties = properties;
    }
    public String fun() {
        return "Person [name=" + name + ", arr=" + Arrays.toString(arr) + ", list=" + list + ", map=" + map
                + ", properties=" + properties + "]";
    }
}

在xml配置文件中按如下方式配置：

<?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">
<!-- IoC 控制反转 Spring根据XML配置文件注入复杂类型属性 -->
<bean id="person" class="com.swift.person.Person">
<property name="name" value="swift"></property>
<property name="arr">
<array>
<value>西施</value>
<value>貂蝉</value>
<value>王昭君</value>
<value>杨玉环</value>
</array>
</property>
<property name="list">
<list>
<value>汪精卫</value>
<value>***</value>
<value>梅兰芳</value>
<value>张学良</value>
</list>
</property>
<property name="map">
<map>
<entry key="name" value="swift"></entry>
<entry key="profession" value="programmer"></entry>
<entry key="city" value="beijing"></entry>
</map>
</property>
<property name="properties">
<props>
<prop key="1">冬天里的一把火</prop>
<prop key="2">逆流成河</prop>
<prop key="3">男儿当自强</prop>
</props>
</property>
</bean>
</beans>

调用的实现类如下：

package com.swift.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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

import com.swift.person.Person;
@WebServlet("/person")
public class ServletPerson extends HttpServlet {
    private static final long serialVersionUID = 1L;
    public ServletPerson() {
        super();
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");
        response.getWriter().append("Served at: ").append(request.getContextPath());
        ApplicationContext context=new ClassPathXmlApplicationContext("context.xml");
        Person per=(Person) context.getBean("person");
        String personInfo=per.fun();
        response.getWriter().append(personInfo);
    }
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

}

浏览器显示效果如下：

 重新编辑上边内容

User类

注意有多个有参构造

package cn.itcast.entity;

public class User {

    private String name;
    private Integer age;
    private Car car;
    
    
    public User() {
        super();
        // TODO Auto-generated constructor stub
    }
    public User(String name, Integer age) {
        super();
        this.name = name;
        this.age = age;
    }
    
    public User(String name, Integer age, Car car) {
        System.out.println("public User(String name, Integer age, Car car)");
        this.name = name;
        this.age = age;
        this.car = car;
    }
    public User(Integer age,String name, Car car) {
        System.out.println("public User(Integer age,String name, Car car)");
        this.name = name;
        this.age = age;
        this.car = car;
    }
    public Car getCar() {
        return car;
    }
    public void setCar(Car car) {
        this.car = car;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    @Override
    public String toString() {
        return "User [name=" + name + ", age=" + age + ", car=" + car + "]";
    }
    
    
}

Car类

package cn.itcast.entity;

public class Car {
    
    private String name;

    public Car() {
        super();
        // TODO Auto-generated constructor stub
    }

    public Car(String name) {
        super();
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "Car [name=" + name + "]";
    }
    

}

乱七八糟集合类 (等待注入)

package cn.itcast.entity;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Properties;

public class InjectionCollectionMap {

    private Object[] array;
    private List list;
    private Map map;
    private Properties properties;
    public Object[] getArray() {
        return array;
    }
    public void setArray(Object[] array) {
        this.array = array;
    }
    public List getList() {
        return list;
    }
    public void setList(List list) {
        this.list = list;
    }
    public Map getMap() {
        return map;
    }
    public void setMap(Map map) {
        this.map = map;
    }
    public Properties getProperties() {
        return properties;
    }
    public void setProperties(Properties properties) {
        this.properties = properties;
    }
    @Override
    public String toString() {
        return "InjectionCollectionMap [array=" + Arrays.toString(array) + ", list=" + list + ", map=" + map
                + ", properties=" + properties + "]";
    }
    
}

分模块配置文件

 

<?xml version="1.0" encoding="UTF-8"?>
<!-- 导入schema 
约束的位置在:
    ..\\spring-framework-4.2.4.RELEASE\\docs\\spring-framework-reference\\html\\xsd-configuration.html
    文件中。
注意：要导入schema约束
-->
<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 name="user" class="cn.itcast.entity.User">
    <property name="name" value="spring"></property>
    <property name="age" value="18"></property>
    <property ref="car" name="car"></property>

</bean>  -->     
                     
<bean name="user" class="cn.itcast.entity.User">
    <constructor-arg name="name" value="gaoyang" index="0" type="java.lang.String"></constructor-arg>
    <constructor-arg name="age" value="26" index="1" type="java.lang.Integer"></constructor-arg>
    <constructor-arg name="car" ref="car" index="2" ></constructor-arg>
</bean>                           

<bean name="car" class="cn.itcast.entity.Car" p:name="布加迪威航">
</bean>

<bean name="injectionCollectionMap" class="cn.itcast.entity.InjectionCollectionMap">
    <property name="array">
        <array>
            <value>1</value>
            <value>2</value>
            <value>3</value>
            <value>4</value>
            <value>5</value>
        </array>
    </property>
    <property name="list">
        <list>
            <value>zhangsan</value>
            <value>lisi</value>
            <value>wangwu</value>
            <value>zhaoliu</value>
            <value>tianqi</value>
        </list>
    </property>
    <property name="map">
        <map>
            <entry key="name" value="gaoyang"></entry>
            <entry key="car" value-ref="car"></entry>
        </map>
    </property>
    <property name="properties">
        <props>
            <prop key="cold">outside is raining</prop>
            <prop key="humid">outside is raining</prop>
        </props>
    </property>
</bean>

</beans>

 

主配置文件中引入分模块

<?xml version="1.0" encoding="UTF-8"?>
<!-- 导入schema 
约束的位置在:
    ..\\spring-framework-4.2.4.RELEASE\\docs\\spring-framework-reference\\html\\xsd-configuration.html
    文件中。
注意：要导入schema约束
-->
<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 name="iCustomerDao" class="cn.itcast.dao.impl.CustomerDaoImpl"></bean>                           
<bean name="iCustomerService" class="cn.itcast.service.impl.CustomerServiceImpl"></bean>    

<import resource="/cn/itcast/property/property_injection.xml"/>
                       
</beans>

测试文件

package cn.itcast.property;

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

import cn.itcast.entity.InjectionCollectionMap;
import cn.itcast.entity.User;

public class TestProperty {

    public static void main(String[] args) {

        ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
        User user = (User) context.getBean("user");
        InjectionCollectionMap injectionCollectionMap = (InjectionCollectionMap) context.getBean("injectionCollectionMap");
        System.out.println(user);
        System.out.println(injectionCollectionMap);
        
        
    }

}