Spring:Bean属性不可写或具有无效的setter方法

Question

我正在试验Spring,我正在关注这本书:Spring:开发人员的笔记本.我收到这个错误:

"Bean property 'storeName' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?"

..而且我很失落.

我有一个ArrayListRentABike实现的类RentABike:

import java.util.*;

public class ArrayListRentABike implements RentABike {
    private String storeName;
    final List bikes = new ArrayList( );

    public ArrayListRentABike( ) { initBikes( ); }

    public ArrayListRentABike(String storeName) {
        this.storeName = storeName;
        initBikes( );
}

public void initBikes( ) {
    bikes.add(new Bike("Shimano", "Roadmaster", 20, "11111", 15, "Fair"));
    bikes.add(new Bike("Cannondale", "F2000 XTR", 18, "22222", 12, "Excellent"));
    bikes.add(new Bike("Trek", "6000", 19, "33333", 12.4, "Fair"));
}

public String toString( ) { return "RentABike: " + storeName; }

public List getBikes( ) { return bikes; }

public Bike getBike(String serialNo) {
    Iterator iter = bikes.iterator( );
    while(iter.hasNext( )) {
        Bike bike = (Bike)iter.next( );
        if(serialNo.equals(bike.getSerialNo( ))) return bike;
    }
        return null;
    }
}

而我RentABike-context.xml就是这样的:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

    <bean id="rentaBike" class="ArrayListRentABike">
        <property name="storeName"><value>"Bruce's Bikes"</value></property>
    </bean>

    <bean id="commandLineView" class="CommandLineView">
        <property name="rentaBike"><ref bean="rentaBike"/></property>
    </bean>

</beans>

有什么想法吗？非常感谢!Krt_Malta

Answer 1

您正在使用setter注入,但没有为属性定义setter storeName.添加setter/getter storeName或使用构造函数注入.

由于您已经定义了一个构造函数storeName作为输入,我会说改为RentABike-context.xml以下内容:

<bean id="rentaBike" class="ArrayListRentABike">
    <constructor-arg index="0"><value>Bruce's Bikes</value></constructor-arg>
</bean>

Answer 2

由于传递给构造函数的参数将初始化storeName,您可以使用该constructor-arg元素来设置storeName.

<bean id="rentaBike" class="ArrayListRentABike">
    <constructor-arg  value="Bruce's Bikes"/>
</bean>

该constructor-arg元件允许传递参数给你的Spring bean的构造函数(惊讶,意外).