Java类型转换工具类-蒲公英云

Java类型转换工具类

女爷i 2022-03-11 11:16 528阅读 0赞

不多说，直接上代码，亲们可以直接复制使用，里面包括了常用的类型转换，一般而言足够使用了！

public class ObjectParser
{
public static Date toDate(Object date) throws ParseException
{
if (date == null)
{
return null;
}
Date result = null;
String str = date.toString();
String parse = str;
parse = parse.replaceFirst(“^[0-9]{4}([^0-9])”, “yyyy$1”);
parse = parse.replaceFirst(“^[0-9]{2}([^0-9])”, “yy$1”);
parse = parse.replaceFirst(“([^0-9])[0-9]{1,2}([^0-9])”, “$1MM$2”);
parse = parse.replaceFirst(“([^0-9])[0-9]{1,2}( ?)”, “$1dd$2”);
parse = parse.replaceFirst(“( )[0-9]{1,2}([^0-9])”, “$1HH$2”);
parse = parse.replaceFirst(“([^0-9])[0-9]{1,2}([^0-9])”, “$1mm$2”);
parse = parse.replaceFirst(“([^0-9])[0-9]{1,2}([^0-9]?)”, “$1ss$2”);

    SimpleDateFormat format = new SimpleDateFormat(parse);
    result = format.parse(str);
    return result;  
\}
 public static Integer toInteger(Object data)  
\{  
    if (data == null)  
    \{  
        return null;  
    \}  
    return Integer.valueOf(data.toString());  
\}
 public static Integer doubleToInteger(Object data)  
\{  
    if (data == null)  
    \{  
        return null;  
    \}  
    double d = Double.valueOf(data.toString());  
    return (int)d;  
\}
 public static Long toLong(Object data)  
\{  
    if (data == null)  
    \{  
        return null;  
    \}  
    return Long.valueOf(data.toString());  
\}
 public static Long doubleToLong(Object data)  
    \{  
        if (data == null)  
        \{  
            return null;  
        \}  
        double d = Double.valueOf(data.toString());  
        return (long)d;  
    \}  
 public static Short toShort(Object data)  
\{  
    if (data == null)  
    \{  
        return null;  
    \}  
    return Short.valueOf(data.toString());  
\}
 public static Double toDouble(Object data)  
\{  
    if (data == null)  
    \{  
        return null;  
    \}  
    return Double.valueOf(data.toString());  
\}  
 public static String toDoubleString(Object data,Integer scale)  
\{  
    if (data == null)  
    \{  
        return null;  
    \}

// DecimalFormat df = new DecimalFormat(“#.00000”);
// return df.format(data);
NumberFormat nf = NumberFormat.getInstance();
// 是否以逗号隔开, 默认true以逗号隔开,如[123,456,789.128]
nf.setGroupingUsed(false);
//小数点后保留几
nf.setMaximumFractionDigits(scale);
return nf.format(data);
}

public static String toString(Object data)  
\{  
    if (data == null)  
    \{  
        return null;  
    \}  
    return String.valueOf(data.toString());  
\}
public static Boolean toBoolean(Object data)  
\{  
    if (data == null)  
    \{  
        return null;  
    \}  
    return Boolean.valueOf(data.toString());  
\}  
public static void main(String\[\] args) \{  
    System.out.println(ObjectParser.toDouble(1234567890123.2232323232));  
    BigDecimal b1 = new BigDecimal(Double.toString(111111111.22));   
    System.out.println(b1.add(new BigDecimal(Double.toString(111111111.22))));  
    System.out.println(ArithUtil.add(111111111.22,111111111.22));  
    System.out.println(ObjectParser.toDoubleString(123456789012.221245666,6));  
\}