Question

我有一个文本框，我需要在变量中输入。输入是数据库表的扩展列，数字被视为字符串。这是输入条件：

只有一个输入，如5028
输入用连字符（ - ）分隔，如5028-5090。
输入用逗号（，）分隔，如5028,5029。
包含在单个输入中分隔的个别，连字符和逗号的输入，如5029,1234-4567,9876。

我已经为只有一个输入形成查询的条件，输入用连字符分隔，输入用逗号分别单独进行..现在根据我的需要我必须写条件，我必须格式化查询输入，如5029,1234 -4567,9876但我没有得到确切的逻辑..

这是我的代码..

if (extension != "") {
    if (extension.contains(",")) {
        query = query.concat(" and (extension='");
        String extn[] = extension.split(",");
        for (int i = 0; i < extn.length; i++) {
            System.out.println(extn[i]);
            query = query.concat(extn[i]).concat("'").concat(" or extension='");
            System.out.println(query);
        }
        query = query.substring(0, query.length() - 15);
        System.out.println(query);
        query = query.concat(")");
        System.out.println(query);
    } else if (extension.contains("-")) {
        query = query.concat(" and cast(extension as signed) >=");
        String extn[] = extension.split("-");
        for (int i = 0; i < extn.length; i++) {
            System.out.println(extn[i]);
            query = query.concat(extn[i]).concat(" And cast(extension as signed) <=");

        }
        query = query.substring(0, query.length() - 33);
        System.out.println(query);

    } else {
        query = query.concat(" and extension='" + extension).concat("'");
        System.out.println(query);
    }
}

请大家帮帮我.. 提前谢谢。

Answer 1

进行以下更改： 1.用if (extension != "")

替换if (!extension.equals(""))

首先，if (extension.contains(","))之后的条件块String extn[] = extension.split(",");再次拆分' - '上的每个字符串extn []并执行其他处理

试试这个

if (!extension.equals("")) {
if (extension.contains(",")) {
    query = query.concat(" and (extension='");
    String extn[] = extension.split(",");
    for(int k=0; k <extn.length; k++){
    if(extn[k].contains("-")){
        String subExtn[] = extn[k].split("-");
        for (int i = 0; i < subExtn.length; i++) {
            //System.out.println(subExtn[i]);
            query = query.concat(subExtn[i]).concat("'").concat(" or extension='");

        }

    }else{
        //for (int i = 0; i < extn.length; i++) {
           // System.out.println(extn[i]);
            query = query.concat(extn[k]).concat("'").concat(" or extension='");
          //  System.out.println(query);
        //}
    }
    //System.out.println(query);
    }
    query = query.substring(0, query.length() - 15);
   // System.out.println(query);
    query = query.concat(")");
    System.out.println(query);
} else if (extension.contains("-")) {
    query = query.concat(" and cast(extension as signed) >=");
    String extn[] = extension.split("-");
    for (int i = 0; i < extn.length; i++) {

        query = query.concat(extn[i]).concat(" And cast(extension as signed) <=");

    }
    query = query.substring(0, query.length() - 33);
    System.out.println(query);

} else {
    query = query.concat(" and extension='" + extension).concat("'");
    System.out.println(query);
}
}

字符串拆分基于java中的字符的操作

1 个答案: