Spring空值和特殊字符的注入方式_Java

空值和特殊字符注入

一、新建类

首先建一个普通类，定义属性，并生成相应的set方法

book.java

public class book {
    private string bname;
    private string bauthor;
    private string address;

    public void setbname(string bname) {
        this.bname = bname;
    }

    public void setbauthor(string bauthor) {
        this.bauthor = bauthor;
    }

    public void setaddress(string address) {
        this.address = address;
    }

    public void testdemo(){
        system.out.println(bname+"    "+bauthor+"    "+address);
    }
}

二、编写配置文件

在配置文件中配置对象创建并进行属性注入

bean5.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"
       xsi:schemalocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--1.配置book对象创建-->
    <bean id="book" class="com.health.ioc.e_空值和特殊字符注入.book">
        <!--2.set方法注入属性-->
        <property name="bname" value="围城"/>
        <property name="bauthor" value="钱钟书"/>

        <!--设置null-->
        <!--<property name="address">
            <null/>
        </property>-->

        <!--特殊符号
            1.把<>用转义字符 &lt; &gt;转义
            2.把特殊符号写道cdata
        -->
        <property name="address">
            <value><![cdata[<<南京>>]]></value>
        </property>

    </bean>
    
</beans>

三、测试

test05.java

public class test05 {
    public static void main(string[] args) {
        applicationcontext context =
                new classpathxmlapplicationcontext("com/health/ioc/e_空值和特殊字符注入/bean5.xml");
        book book = context.getbean("book", book.class);
        book.testdemo();
    }
}

输出结果：