org.noear.solon.validation.util.StringUtils Maven / Gradle / Ivy
/*
* Copyright 2017-2024 noear.org and authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.noear.solon.validation.util;
/**
*
* @author noear
* @since 1.0
* */
public class StringUtils {
/**
* 是否全是数字
*/
public static boolean isDigits(String str) {
if (str != null && str.length() != 0) {
int l = str.length();
for (int i = 0; i < l; ++i) {
if (!Character.isDigit(str.codePointAt(i))) {
return false;
}
}
return true;
} else {
return false;
}
}
/**
* 是否会整型
* */
public static boolean isInteger(String str){
return isNumberDo(str, false);
}
/**
* 是否为数字
* */
public static boolean isNumber(String str) {
return isNumberDo(str, true);
}
/**
* 是否为数值（可以是整数 或 小数 或 负数）
*/
private static boolean isNumberDo(String str, boolean incDot) {
if (str != null && str.length() != 0) {
char[] chars = str.toCharArray();
int l = chars.length;
int start = chars[0] != '-' && chars[0] != '+' ? 0 : 1;
boolean hasDot = false;
for (int i = start; i < l; ++i) {
int ch = chars[i];
if(incDot) {
if (ch == 46) {
if (hasDot) {
return false;
} else {
hasDot = true;
continue;
}
}
}
if (!Character.isDigit(ch)) {
return false;
}
}
return true;
} else {
return false;
}
}
}