Oracle 列表中的最大表达式数为1000

/**
 * 解决Oracle where条件中in条件超过1000大小  列表中的最大表达式数为 1000
 * 把以逗号（','）分割的字符串分割成固定大小的多个组 
 * 把分割开的字符串用 or关键字拼接 然后查询
 * param：以逗号分隔的字符串
 * eachGroupNum：每组多少个数量
 * field：SQL语句中哪个字段查询
 */
public String setConditionByOr(String param, int eachGroupNum, String field){


    String[] paramArray = param.split(",");

    int inArrayNum = (paramArray.length % eachGroupNum == 0) ? paramArray.length / eachGroupNum : paramArray.length / eachGroupNum + 1;


    int m = 0;
    int b = 0;
    int n = eachGroupNum;
    String[] p = new String[inArrayNum];
    String[] sql = new String[inArrayNum];


    for (int k = 0; k < paramArray.length; ++k) {
      if (b < inArrayNum) {
        p[b] = "";
        for (; m < n; ++m) {
          if (m >= paramArray.length){break;}           
          int temp = b;
          String[] tmp = p; 
 tmp[temp] = tmp[temp] + paramArray[m] + ",";
        }
        p[b] = p[b].substring(0, p[b].lastIndexOf(","));


        sql[b] = field + " in (" + p[b] + ")";
        ++b;
        n += eachGroupNum;
      }
    }
    String condition = "";
    for (int j = 0; j < sql.length; ++j) {
      condition = condition + sql[j] + " or ";
    }
    condition = condition.substring(0, condition.lastIndexOf(" or "));
    return condition;
}