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A TDH_SOCKET Client For Java
/*
* Copyright(C) 2011-2012 Alibaba Group Holding Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Authors:
* wentong
*/
package com.taobao.tdhs.client.util;
import org.apache.commons.lang.StringUtils;
import org.jetbrains.annotations.Nullable;
import java.io.UnsupportedEncodingException;
import java.math.BigDecimal;
import java.sql.SQLException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.TimeZone;
/**
* @author 文通
* @since 12-1-13 下午2:42
*/
public final class ConvertUtil {
public static String toHex(byte b) {
return ("" + "0123456789ABCDEF".charAt(0xf & b >> 4) + "0123456789ABCDEF"
.charAt(b & 0xf));
}
public static boolean getBooleanFromString(String v) {
if (StringUtils.isBlank(v)) {
return false;
}
int c = Character.toLowerCase(v.charAt(0));
return !(c == 'f' || c == 'n' || c == '0');
}
public static byte getByteFromString(String stringVal) throws SQLException {
if (StringUtils.isBlank(stringVal)) {
return (byte) 0;
}
stringVal = stringVal.trim();
try {
int decimalIndex = stringVal.indexOf(".");
if (decimalIndex != -1) {
double valueAsDouble = Double.parseDouble(stringVal);
return (byte) valueAsDouble;
}
long valueAsLong = Long.parseLong(stringVal);
return (byte) valueAsLong;
} catch (NumberFormatException NFE) {
throw new SQLException("Parse byte value error:" + stringVal);
}
}
public static short getShortFromString(String stringVal) throws SQLException {
if (StringUtils.isBlank(stringVal)) {
return 0;
}
try {
int decimalIndex = stringVal.indexOf(".");
if (decimalIndex != -1) {
double valueAsDouble = Double.parseDouble(stringVal);
return (short) valueAsDouble;
}
return Short.parseShort(stringVal);
} catch (NumberFormatException e) {
throw new SQLException("Parse integer error:" + stringVal);
}
}
public static int getIntFromString(String stringVal) throws SQLException {
if (StringUtils.isBlank(stringVal)) {
return 0;
}
try {
int decimalIndex = stringVal.indexOf(".");
if (decimalIndex != -1) {
double valueAsDouble = Double.parseDouble(stringVal);
return (int) valueAsDouble;
}
return Integer.parseInt(stringVal);
} catch (NumberFormatException e) {
throw new SQLException("Parse integer error:" + stringVal);
}
}
public static long getLongFromString(String stringVal) throws SQLException {
if (StringUtils.isBlank(stringVal)) {
return 0;
}
try {
int decimalIndex = stringVal.indexOf(".");
if (decimalIndex != -1) {
double valueAsDouble = Double.parseDouble(stringVal);
return (long) valueAsDouble;
}
return Long.parseLong(stringVal);
} catch (NumberFormatException e) {
throw new SQLException("Parse integer error:" + stringVal);
}
}
public static float getFloatFromString(String stringVal) throws SQLException {
if (StringUtils.isBlank(stringVal)) {
return 0;
}
try {
return Float.parseFloat(stringVal);
} catch (NumberFormatException e) {
throw new SQLException("Parse integer error:" + stringVal);
}
}
public static double getDoubleFromString(String stringVal) throws SQLException {
if (StringUtils.isBlank(stringVal)) {
return 0;
}
try {
return Double.parseDouble(stringVal);
} catch (NumberFormatException e) {
throw new SQLException("Parse integer error:" + stringVal);
}
}
public static BigDecimal getBigDecimalFromString(String stringVal,
int scale) throws SQLException {
BigDecimal bdVal;
if (stringVal != null) {
if (stringVal.length() == 0) {
bdVal = new BigDecimal("0");
try {
return bdVal.setScale(scale);
} catch (ArithmeticException ex) {
try {
return bdVal.setScale(scale, BigDecimal.ROUND_HALF_UP);
} catch (ArithmeticException arEx) {
throw new SQLException(
"ResultSet.Bad_format_for_BigDecimal: value="
+ stringVal + ",scale=" + scale);
}
}
}
try {
try {
return new BigDecimal(stringVal).setScale(scale);
} catch (ArithmeticException ex) {
try {
return new BigDecimal(stringVal).setScale(scale,
BigDecimal.ROUND_HALF_UP);
} catch (ArithmeticException arEx) {
throw new SQLException(
"ResultSet.Bad_format_for_BigDecimal: value="
+ stringVal + ",scale=" + scale);
}
}
} catch (NumberFormatException ex) {
throw new SQLException(
"ResultSet.Bad_format_for_BigDecimal: value="
+ stringVal + ",scale=" + scale);
}
}
return null;
}
public static BigDecimal getBigDecimalFromString(String stringVal) throws SQLException {
BigDecimal val;
if (stringVal != null) {
if (stringVal.length() == 0) {
val = new BigDecimal("0");
return val;
}
try {
val = new BigDecimal(stringVal);
return val;
} catch (NumberFormatException ex) {
throw new SQLException(
"ResultSet.Bad_format_for_BigDecimal: value="
+ stringVal);
}
}
return null;
}
public static Long getTimeFromString(String stringVal, @Nullable Calendar cal)
throws SQLException {
if (stringVal == null) {
return null;
}
String val = stringVal.trim();
if (val.length() == 0) {
return null;
}
if (val.equals("0") || val.equals("0000-00-00")
|| val.equals("0000-00-00 00:00:00")
|| val.equals("00000000000000") || val.equals("0")) {
Calendar calendar = null;
if (cal != null) {
calendar = Calendar.getInstance(cal.getTimeZone());
} else {
calendar = Calendar.getInstance();
}
calendar.set(Calendar.YEAR, 1);
calendar.set(Calendar.MONTH, 0);
calendar.set(Calendar.DAY_OF_MONTH, 1);
return calendar.getTimeInMillis();
}
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
if (cal != null) {
TimeZone timeZone = cal.getTimeZone();
dateFormat.setTimeZone(timeZone);
}
try {
return dateFormat.parse(val).getTime();
} catch (ParseException e) {
throw new SQLException("Parse date failure:" + val);
}
}
/**
* Method getStringFromByte ...
*
* @param f of type byte[]
* @param charsetName of type String
*
* @return String
*
* @throws UnsupportedEncodingException when
*/
public static String getStringFromByte(byte[] f, String charsetName) throws UnsupportedEncodingException {
if (f.length == 0) {
return null;
} else if (f.length == 1 && f[0] == 0) {
return "";
} else {
return StringUtils.isNotBlank(charsetName) ? new String(f, charsetName) :
new String(f);
}
}
}
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