java类型转换工具的使用
public class CastUtil {
/**
* 转为String型
* @param obj
* @return
*/
public static String castString(Object obj) {
return CastUtil.castString(obj,"");
}
/**
* 转为String型(提供默认值)
*/
public static String castString(Object obj,String defaultString) {
return obj != null ? String.valueOf(obj) : defaultString;
}
/**
* 转为double型
*/
public static double castDouble(Object obj) {
return CastUtil.castDouble(obj,0);
}
/**
* 转为double型(提供默认值)
*/
public static double castDouble(Object obj,double defaultValue) {
double doubleValue = defaultValue;
if(obj != null ) {
String strValue = castString(obj);
if(StringUtil.isNotEmpty(strValue)) {
try {
doubleValue = Double.parseDouble(strValue);
}catch(NumberFormatException e) {
doubleValue = defaultValue;
}
}
}
return doubleValue;
}
/**
* 转为long型
*/
public static long castLong(Object obj) {
return castLong(obj,0);
}
/**
* 转为long型(提供默认值)
*/
public static long castLong(Object obj,long defaultValue) {
long longValue = defaultValue;
if(obj != null) {
String strValue = castString(obj);
if(StringUtil.isNotEmpty(strValue)) {
try {
longValue = Long.parseLong(strValue);
} catch (NumberFormatException e) {
longValue = defaultValue;
}
}
}
return longValue;
}
/**
* 转为Int型
*/
public static int castInt(Object obj) {
return castInt(obj,0);
}
/**
* 转为Int(提供默认值)
*/
public static int castInt(Object obj,int defaultValue) {
int intValue = defaultValue;
if(obj != null) {
String strValue = castString(obj);
if(StringUtil.isNotEmpty(strValue)) {
try{
intValue = Integer.parseInt(strValue);
}catch (NumberFormatException e) {
intValue = defaultValue;
}
}
}
return intValue;
}
/**
* 转为boolean型
*/
public static boolean castBoolean(Object obj) {
return CastUtil.castBoolean(obj,false);
}
/**
* 转为Boolean(提供默认值)
*/
public static boolean castBoolean(Object obj,boolean defaultValue) {
boolean booleanValue = defaultValue;
if(obj != null) {
booleanValue = Boolean.parseBoolean(castString(obj));
}
return booleanValue;
}
}