Question

java spring 构造器注入报错

package cn.csdn.hr.service;
public class GeetingServiceBean implements GreetingService {
private int greeting;
public void setGreeting(int greeting) {
this.greeting = greeting;
}
public GeetingServiceBean(int greeting) {
this.greeting = greeting;
}
public GeetingServiceBean() {
}
public void sayGeeting() {
System.out.println(greeting);
}
}

<?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-2.5.xsd">

<bean id="geetingServiceBean" class="cn.csdn.hr.service.GeetingServiceBean">
<constructor-arg type="int" value="456">
</constructor-arg>
</bean>
<!--
<bean id="geetingServiceBean" class="cn.csdn.hr.service.GeetingServiceBean">
<property name="greeting">
<value>111</value>
</property>
</bean>
-->
</beans>
用set方式不会报错，但是用构造器缺报错了：Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'geetingServiceBean' defined in class path resource [applicationContext.xml]: Could not resolve matching constructor (hint: specify index/type/name arguments for simple parameters to avoid type ambiguities)

Answer 1

试试：<constructor-arg type="搜卜int"纳漏肢>
<value>456</value>
</constructor-arg>
不要引号洞世

追问

一样不行啊。。。

追答

（1）这样试试：

456

（2）删除无参构造函数定义试试；

Answer 2

估计是使用到了不带参数的构造函数了，其他不是很清楚

追问

你有没spring构造器注入小例子源码？

追答

没找到

Answer 3

删除无参的构造方法试试

追问

试过了

Answer 4

一般用属性注入的