FormatUtil类型格式转换

package cn.edu.hbcf.common.utils;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * FormatUtil.class 字符串,数字之间的转换工具类。
 * 
 * @author*/

public class FormatUtil {

    private static final Log log = LogFactory.getLog(FormatUtil.class);

    /**
     * Integer转换为String,如果integer==null则返回null
     * 
     * @param integer
     * @return
     */
    public static final String convertIntegerToString(Integer integer) {
        if (integer == null) {
            return null;
        }
        return integer.toString();
    }

    // add by sxy:把一个字符串 前面加0直到8位，如时间9080808转成09080808
    public static final String convertStringTo8DigitString(String str) {
        if (str == null) {
            return null;
        }
        String result = "";
        int length = (8 - str.length());
        for (int i = 0; i < length; i++) {
            result = result + "0";
        }
        return result + str;
    }

    /**
     * Short转换为String,如果parashort==null则返回null
     * 
     * @param parashort
     * @return
     */
    public static final String convertShortToString(Short parashort) {
        if (parashort == null) {
            return null;
        }
        return parashort.toString();
    }

    /**
     * CHECKBOX 转化
     * 
     * @param parashort
     * @return
     */
    public static final String checkboxToString(String str) {
        if (str == null) {
            return "0";
        } else {
            return "1";
        }
    }

    /**
     * BigDecimal转换为String,如果bigDecimal==null则返回null
     * 
     * @param bigDecimal
     * @return
     */
    public static final String convertBigDecimalToString(BigDecimal bigDecimal) {
        if (bigDecimal == null) {
            return null;
        }
        return bigDecimal.toString();
    }

    /**
     * 字符串转换为BigDecimal，转换失败返回null.
     * 
     * @param num
     * @return
     */
    public static final BigDecimal convertStringToDecimal(String num) {
        BigDecimal bigDecimal = null;
        try {
            bigDecimal = new BigDecimal(num);
        } catch (Exception e) {
            log.warn("FormatUtil.convertStringToDecimal(" + num
                    + ") failed with the errorMessage:" + e.getMessage());
        }
        return bigDecimal;
    }

    /**
     * 字符串转换为Integer，转换失败返回null.
     * 
     * @param aStr
     * @return
     */
    public static final Integer StringToInt(String aStr) {
        Integer integer = 0;
        try {
            if (!isEmpty(aStr)) {
                integer = new Integer(aStr);
            }
        } catch (Exception e) {
            log.warn("FormatUtil.StringToInt(" + aStr
                    + ") failed with the errorMessage:" + e.getMessage());
        }
        return integer;
    }

    /**
     * 字符串是否为空：str==null 或者str为空串返回true;否则返回false
     * 
     * @param str
     * @return
     */
    public static final boolean isEmpty(String str) {
        return (str == null || str.trim().length() == 0) ? true : false;
    }

    /**
     * 字符串是否非空:str==null 或者str为空串返回false;否则返回true
     * 
     * @param str
     * @return
     */
    public static final boolean isNotEmpty(String str) {
        return !isEmpty(str);
    }

    /**
     * 如果字符串是空或者是空串，则返回null;否则返回str.trim()
     * 
     * @param str
     */
    public static final String trimNull(String str) {
        return (isEmpty(str) ? null : str.trim());
    }

    /**
     * Integer 转换成BigDecimal：如果integer==null,返回null;否则返回转换后的BigDecimal.
     * 
     * @param integer
     * @return
     */
    public static final BigDecimal convertIntegerToBigDecimal(Integer integer) {
        return (integer == null ? null : BigDecimal.valueOf(integer));
    }

    /**
     * Long 转换成BigDecimal：如果Long==null,返回null;否则返回转换后的BigDecimal.
     * 
     * @param Long
     * @return
     */
    public static final BigDecimal convertLongToBigDecimal(Long para) {
        return (para == null ? null : BigDecimal.valueOf(para));
    }

    /**
     * Integer 转换成BigInteger：如果integer==null,返回null;否则返回转换后的BigInteger.
     * 
     * @param integer
     * @return
     */
    public static final BigInteger convertIntegerToBigInteger(Integer integer) {
        return (integer == null ? null : BigInteger.valueOf(integer));
    }

    /**
     * Short 转换成BigInteger：如果integer==null,返回null;否则返回转换后的BigInteger.
     * 
     * @param integer
     * @return
     */
    public static final BigInteger convertShortToBigInteger(Short source) {
        return (source == null ? null : BigInteger.valueOf(source));
    }

    /**
     * BigInteger 转换成Integer：如果bigInteger==null,返回null;否则返回转换后的Integer.
     * 
     * @param bigInteger
     * 
     * @return
     */
    public static final Integer convertBigIntegerToInteger(BigInteger bigInteger) {
        return (bigInteger == null ? null : bigInteger.intValue());
    }

    public static final Integer convertBigDecimalToInteger(BigDecimal bigDecimal) {
        if (bigDecimal == null) {
            return null;
        }
        return bigDecimal.intValue();
    }

    public static final Long StringToLong(String aStr) {
        Long longTemp = null;
        try {
            longTemp = new Long(aStr);
        } catch (Exception e) {
            log.warn("FormatUtil.StringToLong(" + aStr
                    + ") failed with the errorMessage:" + e.getMessage());
        }
        return longTemp;
    }

    public static final Integer convertLongToInteger(Long para) {
        return (para == null ? null : para.intValue());
    }

    /**
     * 将字符串str截取成最大maxBytesLength的字2节，如果str字节数小于maxBytesLength，则返回原始str
     */
    public static String subString(String str, int maxBytesLength) {
        if (isNotEmpty(str) && str.getBytes().length > maxBytesLength) {
            byte[] bytesOut = new byte[maxBytesLength];
            byte[] bytesIn = str.getBytes();
            System.arraycopy(bytesIn, 0, bytesOut, 0, maxBytesLength);
            str = new String(bytesOut);
        }
        return str;
    }

    /**
     * 将字符串str转化成double类型
     * 
     */
    public static final Double convertStringToDouble(String str) {
        Double doubleTemp = 0.0;
        if (isEmpty(str)) {
            return doubleTemp;
        } else {
            doubleTemp = Double.parseDouble(str);
            return doubleTemp;
        }
    }

    /**
     * 将字符串str转化成Float类型
     * 
     */
    public static final Float convertStringToFloat(String str) {
        Float floatTemp = new Float(0);
        if (isEmpty(str)) {
            return floatTemp;
        } else {
            floatTemp = Float.valueOf(str);
            return floatTemp;
        }
    }

    public static final Long convertBigDecimalToLong(BigDecimal bigDecimal) {
        String strTemp = convertBigDecimalToString(bigDecimal);
        Long longTemp = StringToLong(strTemp);
        return longTemp;
    }

    public static final BigInteger convertBigDecimalToBigInteger(
            BigDecimal bigDecimal) {
        Integer intTemp = convertBigDecimalToInteger(bigDecimal);
        BigInteger bigIntegerTemp = convertIntegerToBigInteger(intTemp);
        return bigIntegerTemp;
    }

    public static void main(String args[]) {
        String result = convertStringTo8DigitString("22111111");
        System.out.println(result);
    }

    public static Map<String, Object> string2Map(String context) {
        if (context.length() <= 2) {
            return null;
        }
        Map<String, Object> map = new HashMap<String, Object>();
        context = context.substring(1, context.length() - 1);
        String[] contextArray = context.split(",");
        for (String attribute : contextArray) {
            String[] attr = attribute.split(":");
            if (attr.length == 2 && attr[1].length() > 2) {
                String value = attr[1].substring(1, attr[1].length() - 1);
                map.put(attr[0], value);
            }
        }
        return map;
    }
}