package Medical.framework.Util;
import java.util.Collection;
import java.util.Map;
/**
* 字符串工具类
*/
public class StringUtils {
/**
* 空字符串
*/
private static final String NULLSTR = "";
/**
* 下划线
*/
private static final char SEPARATOR = '_';
/**
* 获取参数不为空值
*
* @param value defaultValue 要判断的value
* @return value 返回值
*/
public static <T> T nvl(T value, T defaultValue) {
return value != null ? value : defaultValue;
}
/**
* * 判断一个Collection是否为空, 包含List,Set,Queue
*
* @param coll 要判断的Collection
* @return true:为空 false:非空
*/
public static boolean isEmpty(Collection<?> coll) {
return isNull(coll) || coll.isEmpty();
}
/**
* * 判断一个Collection是否非空,包含List,Set,Queue
*
* @param coll 要判断的Collection
* @return true:非空 false:空
*/
public static boolean isNotEmpty(Collection<?> coll) {
return !isEmpty(coll);
}
/**
* * 判断一个对象数组是否为空
*
* @param objects 要判断的对象数组
* * @return true:为空 false:非空
*/
public static boolean isEmpty(Object[] objects) {
return isNull(objects) || (objects.length == 0);
}
/**
* * 判断一个对象数组是否非空
*
* @param objects 要判断的对象数组
* @return true:非空 false:空
*/
public static boolean isNotEmpty(Object[] objects) {
return !isEmpty(objects);
}
/**
* * 判断一个Map是否为空
*
* @param map 要判断的Map
* @return true:为空 false:非空
*/
public static boolean isEmpty(Map<?, ?> map) {
return isNull(map) || map.isEmpty();
}
/**
* * 判断一个Map是否为空
*
* @param map 要判断的Map
* @return true:非空 false:空
*/
public static boolean isNotEmpty(Map<?, ?> map) {
return !isEmpty(map);
}
/**
* * 判断一个字符串是否为空串
*
* @param str String
* @return true:为空 false:非空
*/
public static boolean isEmpty(String str) {
return isNull(str) || NULLSTR.equals(str.trim());
}
/**
* * 判断一个字符串是否为非空串
*
* @param str String
* @return true:非空串 false:空串
*/
public static boolean isNotEmpty(String str) {
return !isEmpty(str);
}
/**
* * 判断一个对象是否为空
*
* @param object Object
* @return true:为空 false:非空
*/
public static boolean isNull(Object object) {
return object == null;
}
/**
* * 判断一个对象是否非空
*
* @param object Object
* @return true:非空 false:空
*/
public static boolean isNotNull(Object object) {
return !isNull(object);
}
/**
* * 判断一个对象是否是数组类型(Java基本型别的数组)
*
* @param object 对象
* @return true:是数组 false:不是数组
*/
public static boolean isArray(Object object) {
return isNotNull(object) && object.getClass().isArray();
}
/**
* 去空格
*/
public static String trim(String str) {
return (str == null ? "" : str.trim());
}
/**
* 截取字符串
*
* @param str 字符串
* @param start 开始
* @return 结果
*/
public static String substring(final String str, int start) {
if (str == null) {
return NULLSTR;
}
if (start < 0) {
start = str.length() + start;
}
if (start < 0) {
start = 0;
}
if (start > str.length()) {
return NULLSTR;
}
return str.substring(start);
}
/**
* 截取字符串
*
* @param str 字符串
* @param start 开始
* @param end 结束
* @return 结果
*/
public static String substring(final String str, int start, int end) {
if (str == null) {
return NULLSTR;
}
if (end < 0) {
end = str.length() + end;
}
if (start < 0) {
start = str.length() + start;
}
if (end > str.length()) {
end = str.length();
}
if (start > end) {
return NULLSTR;
}
if (start < 0) {
start = 0;
}
if (end < 0) {
end = 0;
}
return str.substring(start, end);
}
/**
* 格式化文本, {} 表示占位符<br>
* 此方法只是简单将占位符 {} 按照顺序替换为参数<br>
* 如果想输出 {} 使用 \\转义 { 即可,如果想输出 {} 之前的 \ 使用双转义符 \\\\ 即可<br>
* 例:<br>
* 通常使用:format("this is {} for {}", "a", "b") -> this is a for b<br>
* 转义{}: format("this is \\{} for {}", "a", "b") -> this is \{} for a<br>
* 转义\: format("this is \\\\{} for {}", "a", "b") -> this is \a for b<br>
*
* @param template 文本模板,被替换的部分用 {} 表示
* @param params 参数值
* @return 格式化后的文本
*/
// public static String format(String template, Object... params) {
// if (isEmpty(params) || isEmpty(template)) {
// return template;
// }
// return StrFormatter.format(template, params);
// }
//
// /**
// * 驼峰首字符小写
// */
// public static String uncapitalize(String str) {
// int strLen;
// if (str == null || (strLen = str.length()) == 0) {
// return str;
// }
// return new StrBuilder(strLen).append(Character.toLowerCase(str.charAt(0))).append(str.substring(1)).toString();
// }
/**
* 下划线转驼峰命名
*/
public static String toUnderScoreCase(String s) {
if (s == null) {
return null;
}
StringBuilder sb = new StringBuilder();
boolean upperCase = false;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
boolean nextUpperCase = true;
if (i < (s.length() - 1)) {
nextUpperCase = Character.isUpperCase(s.charAt(i + 1));
}
if ((i > 0) && Character.isUpperCase(c)) {
if (!upperCase || !nextUpperCase) {
sb.append(SEPARATOR);
}
upperCase = true;
} else {
upperCase = false;
}
sb.append(Character.toLowerCase(c));
}
return sb.toString();
}
/**
* 是否包含字符串
*
* @param str 验证字符串
* @param strs 字符串组
* @return 包含返回true
*/
public static boolean inStringIgnoreCase(String str, String... strs) {
if (str != null && strs != null) {
for (String s : strs) {
if (str.equalsIgnoreCase(trim(s))) {
return true;
}
}
}
return false;
}
/**
* 将下划线大写方式命名的字符串转换为驼峰式。如果转换前的下划线大写方式命名的字符串为空,则返回空字符串。 例如:HELLO_WORLD->HelloWorld
*
* @param name 转换前的下划线大写方式命名的字符串
* @return 转换后的驼峰式命名的字符串
*/
public static String convertToCamelCase(String name) {
StringBuilder result = new StringBuilder();
// 快速检查
if (name == null || name.isEmpty()) {
// 没必要转换
return "";
} else if (!name.contains("_")) {
// �
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