java科学计数法转换为普通数字,java科学计数转为数字

项目中有一个对流水的操作，需要将导出的流水文件，导入到系统中
流水文件中金额是科学计数法表示的，需要转换成为String

/** * 科学计数法转换 * @param numberStr * @return */private String convertNumber(String numberStr) { BigDecimal resultNumber = new BigDecimal("1"); // 是否为科学计数法 if (numberStr.indexOf("E") != -1) { int frontLeng = numberStr.indexOf("E"); String frontNumber = numberStr.substring(0, frontLeng); BigDecimal front = new BigDecimal(frontNumber); int bankLeng = numberStr.indexOf("+"); String bankNumber = numberStr.substring(bankLeng + 1, numberStr.length()); int bankint = Integer.valueOf(bankNumber); BigDecimal base = new BigDecimal("10"); BigDecimal bank = new BigDecimal("1"); for (int k = 0; k < bankint; k++) { bank = bank.multiply(base); } resultNumber = front.multiply(bank); } else { resultNumber = new BigDecimal(numberStr); } // 截取小数点，前面的数字 String resultStr = String.valueOf(resultNumber); int point = resultStr.indexOf("."); resultStr = resultStr.substring(0, point); return resultStr;}