在Spring中創建bean時出錯

Question

大家好，我是春季初學者，我剛開始使用它。 我得到一個錯誤

錯誤創建名稱爲豆‘問題’在類路徑資源定義爲「[組織/收集/ ApplicationContext2.xml]：指定3構造函數的參數，但沒有匹配的構造函數豆‘的問題’發現（提示：指定索引/型號/名稱參數進行簡單的參數，以避免類型歧義）」

我有兩個班月1日是問題，它包含一個構造函數問題和第二類是答案

我想創建參考的答案類，並插入問題類有陣列列表

我瞪着它，發現我需要指定類型。 我已經指定，但我仍收到錯誤

謝謝..

Question.java

package org.collection; 

import java.awt.List; 
import java.util.ArrayList; 
import java.util.HashSet; 
import java.util.Iterator; 



public class Question { 
    private int id; 
    private String name; 
    private ArrayList<String> answers; 
    //private HashSet<String> answers1; 

    public Question() 
    { 
     //Default constructor 
    } 

    public Question(int id,String name,ArrayList<String> answers) 
    { 
     super(); 
     this.id=id; 
     this.name=name; 
     this.answers=answers; 

    } 

    public void display() 
    { 
     System.out.println("Id :"+id+"\nName :"+name); 
     System.out.println("Answers are"); 
     Iterator<String> itr= answers.iterator(); 
     while(itr.hasNext()) 
     { 
      System.out.println(itr.next()); 
     } 

     /*System.out.println("----------picking up the answers from HashSet---------"); 
     Iterator<String> itr1=answers1.iterator(); 
     while(itr1.hasNext()) 
     { 
      System.out.println(itr1.next()); 
     } 
     System.out.println("-------reached-----------");*/ 



    } 

} 

Answer.java

package org.collection; 

public class Answer { 
    private int id; 
    private String name; 
    private String by; 

    public Answer() { 
     // TODO Auto-generated constructor stub 
    } 

    public Answer(int id,String name,String by) 
    { 
     super(); 
     this.id=id; 
     this.name=name; 
     this.by=by; 

    } 

    public String toString() 
    { 
     return "ID :"+id+"\nName"+name+"\nBy :"+by; 
    } 
} 

的ApplicationContext .xml2

<?xml version="1.0" encoding="UTF-8"?> 
 

 
<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-3.0.xsd"> 
 
    
 

 
<bean id="ans1" class="org.collection.Answer"> 
 
<constructor-arg value="1" type="int"></constructor-arg> 
 
<constructor-arg value="java is a progamming language hahahaha" type="java.lang.String"></constructor-arg> 
 
<constructor-arg value ="varun" type="java.lang.String"> </constructor-arg> 
 
</bean> 
 
    
 
<bean id ="ans2" class="org.collection.Answer"> 
 
<constructor-arg value="2" type="int"></constructor-arg> 
 
<constructor-arg value="java is a platfornm" type="java.lang.String"></constructor-arg> 
 
<constructor-arg value ="Rahul" type="java.lang.String"></constructor-arg> 
 
</bean> 
 
    
 
<bean id="question" class= "org.collection.Question"> 
 
<constructor-arg value="111" type="int"></constructor-arg> 
 
<constructor-arg value="What is java ?" type="java.lang.String"></constructor-arg> 
 
<constructor-arg> 
 
<list> 
 
<ref bean="ans1"/> 
 
<ref bean="ans2"/> 
 
</list> 
 
    </constructor-arg> 
 
    </bean> 
 
</beans>

Answer 1

這三個參數的構造函數中Question期待的StringList。但是，您正在通過Answer的List。將Question類中的第三個參數更改爲ArrayList<Answer> answers