小编Kri*_*riz的帖子

我Could not resolve matching constructor (hint: specify index/type/name arguments for simple parameters to avoid type ambiguities)在执行弹簧程序时遇到错误" ".我是Spring核心新手,并试图学习框架.以下是代码:

Student.java

package com.inject.test;

public class Student {

    private String name;
    private String className;
    private Address address;



    public Address getAddress() {
        return address;
    }
    public void setAddress(Address address) {
        this.address = address;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getClassName() {
        return className;
    }
    public void setClassName(String className) {
        this.className …

我需要一个查询,它可以生成上个月生成的记录总数.我从这个查询开始:

select state, taxing_entity, count(taxing_entity) Total_TRXN_Count
from taxes where effect_date between '2016/07/01' and '2016/07/31' 
group by state, taxing_entity, effect_date

但我需要一个查询,它可以动态计算前一个月的记录数,而无需对日期进行硬编码.我尝试了很多查询,例如:

SELECT * FROM taxes 
WHERE effect_date >= DATEADD(day,-30, getdate()) 
and effect_date <= getdate()

和

SELECT * 
FROM taxes
WHERE effect_date >= DATEADD(effect_date, -1, GETDATE()) 

但直到现在我还没有成功.有人可以建议一种方法来使用SQL的Informix方言获取上个月的总记录吗？

我有以下代码:

public class AClass {
    public AClass() {
        System.out.println("Constructor A");
    }
}

public class BClass extends AClass{
    public BClass(){
        System.out.println("Constructor B");
    }
}

public class Test {
    public static void main(String[] args) {
        BClass b = new BClass();
    }
}

我改变了代码,如下所示:

public class AClass {
    public AClass() {
        System.out.println("Constructor A");
    }
}

public class BClass extends AClass{
    public BClass(){
        System.out.println("Constructor B");
    }
}

public class Test {
    public static void main(String[] args) {
        BClass b = new AClass();
    }
} …