org.snaker.engine.helper.StringHelper Maven / Gradle / Ivy
/* Copyright 2012-2013 the original author or 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
*
* http://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.snaker.engine.helper;
import org.apache.commons.lang.StringUtils;
import org.snaker.engine.SnakerException;
/**
* 字符串处理帮助类
* @author yuqs
* @version 1.0
*/
public class StringHelper {
/**
* 获取uuid类型的字符串
* @return
*/
public static String getPrimaryKey() {
return java.util.UUID.randomUUID().toString().replace("-", "");
}
/**
* 判断字符串是否为空
* @param str
* @return
*/
public static boolean isEmpty(String str) {
return str == null || str.length() == 0;
}
/**
* 判断字符串是否为非空
* @param str
* @return
*/
public static boolean isNotEmpty(String str) {
return !isEmpty(str);
}
/**
* 根据字符串数组返回逗号分隔的字符串值
* @param strs
* @return
*/
public static String getStringByArray(String... strs) {
if(strs == null) return null;
StringBuffer buffer = new StringBuffer(strs.length * 10);
for(String str : strs) {
buffer.append(str).append(",");
}
buffer.deleteCharAt(buffer.length() - 1);
return buffer.toString();
}
/**
* xml内容特殊符号替换
* @param xml
* @return
*/
public static String textXML(String xml) {
if(xml == null) return "";
String content = xml;
content = content.replaceAll("<", "<");
content = content.replaceAll(">", ">");
content = content.replaceAll("\"", """);
content = content.replaceAll("\n", "");
return content;
}
/**
* 构造排序条件
* @param order
* @param orderby
* @return
*/
public static String buildPageOrder(String order, String orderby) {
String[] orderByArray = StringUtils.split(orderby, ',');
String[] orderArray = StringUtils.split(order, ',');
if(orderArray.length != orderByArray.length) throw new SnakerException("分页多重排序参数中,排序字段与排序方向的个数不相等");
StringBuffer orderStr = new StringBuffer(30);
orderStr.append(" order by ");
for (int i = 0; i < orderByArray.length; i++) {
orderStr.append(orderByArray[i]).append(" ").append(orderArray[i]).append(" ,");
}
orderStr.deleteCharAt(orderStr.length() - 1);
return orderStr.toString();
}
/**
* 简单字符串匹配方法，支持匹配类型为：
* *what *what* what*
* @param pattern
* @param str
* @return
*/
public static boolean simpleMatch(String pattern, String str) {
if (pattern == null || str == null) {
return false;
}
int firstIndex = pattern.indexOf('*');
if (firstIndex == -1) {
return pattern.equals(str);
}
if (firstIndex == 0) {
if (pattern.length() == 1) {
return true;
}
int nextIndex = pattern.indexOf('*', firstIndex + 1);
if (nextIndex == -1) {
return str.endsWith(pattern.substring(1));
}
String part = pattern.substring(1, nextIndex);
int partIndex = str.indexOf(part);
while (partIndex != -1) {
if (simpleMatch(pattern.substring(nextIndex), str.substring(partIndex + part.length()))) {
return true;
}
partIndex = str.indexOf(part, partIndex + 1);
}
return false;
}
return (str.length() >= firstIndex &&
pattern.substring(0, firstIndex).equals(str.substring(0, firstIndex)) &&
simpleMatch(pattern.substring(firstIndex), str.substring(firstIndex)));
}
}