Spring問題記錄

1. 通過set方法配置Bean屬性

在XML文件中配置bean，通過property屬性設置值時，要注意property的name的值和類成員屬性的set方法名（除掉set的部分）一一對應。
Person類

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

XML文件

   <bean id="xiaohong" class="main.Person">
        <property name="name" value="xiaohong"></property>
        <property name="age" value="99"></property>
    </bean>

如果將Person類方法改爲如下，就會出錯

 public void setName1(String name) {
        this.name = name;
    }
    public void setAge1(int age) {
        this.age = age;
    }

報錯信息（截取第一行）：

Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘xiaohong’ defined in class path resource [spring-config.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property ‘name’ of bean class [main.Person]: Bean property ‘name’ is not writable or has an invalid setter method. Did you mean ‘name1’?

此時需將XML文件中name值對應修改

 <bean id="xiaohong" class="main.Person">
        <property name="name1" value="xiaohong"></property>
        <property name="age1" value="99"></property>
    </bean>

當然，日常代碼中應該都會默認用類屬性名填充XML中property的name值；這裏只是做一個理解方面的介紹，避免萬一出錯不知道原因出在哪。