变量必须提供维表达式或数组初始化错误 [英] Variable must provide either dimension expressions or an array initializer error

问题描述

出于测试目的，我对一个bean数组进行了编码，以便可以将变量传递给数据库。我现在要从表单中提取变量，如果变量不为null，则希望在bean数组中进行设置。我认为我的语法是错误的。

For testing purposes, I harded coded a bean array so I can pass variables to the database. I'm now pulling the variables from a form and want to set them in the bean array if they are not null. I assume my syntax is wrong.

硬编码：

CriteriaBean[] filters = new CriteriaBean[]
{
    new CriteriaBean("YEAR","=","2012"),
    new CriteriaBean("LOCATION","in","('XXX','YYY')"),
    new CriteriaBean("TOM","is","not null") 
};

我正在尝试执行以下操作并收到错误：

I was trying to do something like this and got the error:

 CriteriaBean[] filters = new CriteriaBean[]
           {
            if (form.getYear() != null) 
            {   
            new CriteriaBean("YEAR","=","2012")
            }


           };

CriteriaBean

CriteriaBean

public class CriteriaBean
    {
public static final CriteriaBean[] EMPTY_ARRAY = new CriteriaBean[0];

private String fieldName;
private String value;
private String operation;

public CriteriaBean() { } 
public CriteriaBean( String field, 
                              String op, 
                              String val ) 
{
   this.fieldName = field; 
   this.operation = op;
   this.value = val;
}



public String getName() { return this.name; }
public String getOp() { return this.op; }
public String getVal() { return this.val; }

public void setName(String val) { this.name = val; }
public void setOp(String val) { this.op = val; }
public void setVal(String val) { this.val = val; }

是否有更好的方法？

推荐答案

关闭！试试这个：

CriteriaBean[] filters = form.getWySelect() == null
    ? new CriteriaBean[] {}
    : new CriteriaBean[] {
        new CriteriaBean("WORKLOAD_YEAR","=","2012")
      };

此代码使用三元语法可根据情况使用备用初始化程序。

This code uses the ternary syntax to use alternate initializers depending on the condition.

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