java语言StringUtils工具类

- 日理万妓 2022-05-19 11:42 253阅读 0赞

import com.mls.util.tool.codec.EncodeUtils;
    import com.mls.util.tool.collect.ListUtils;
    import org.apache.commons.lang3.StringEscapeUtils;
    
    import java.io.UnsupportedEncodingException;
    import java.util.List;
    import java.util.Random;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    
    /**
     * 字符串工具类, 继承org.apache.commons.lang3.StringUtils类
     * @version 2018-1-6
     */
    public class StringUtils extends org.apache.commons.lang3.StringUtils {
    	
        private static final char SEPARATOR = '_';
        private static final String CHARSET_NAME = "UTF-8";
        
        /**
         * 转换为字节数组
         * @param str
         * @return
         */
        public static byte[] getBytes(String str){
        	if (str != null){
        		try {
    				return str.getBytes(CHARSET_NAME);
    			} catch (UnsupportedEncodingException e) {
    				return null;
    			}
        	}else{
        		return null;
        	}
        }
        
        /**
         * 转换为字节数组
         * @param str
         * @return
         */
        public static String toString(byte[] bytes){
        	try {
    			return new String(bytes, CHARSET_NAME);
    		} catch (UnsupportedEncodingException e) {
    			return EMPTY;
    		}
        }
        
        /**
         * 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 inString(String str, String... strs){
        	if (str != null && strs != null){
            	for (String s : strs){
            		if (str.equals(trim(s))){
            			return true;
            		}
            	}
        	}
        	return false;
        }
        
        /**
         * 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;
        }
    	
    	/**
    	 * 替换掉HTML标签方法
    	 */
    	public static String stripHtml(String html) {
    		if (isBlank(html)){
    			return "";
    		}
    		//html.replaceAll("\\&[a-zA-Z]{0,9};", "").replaceAll("<[^>]*>", "");
    		String regEx = "<.+?>";
    		Pattern p = Pattern.compile(regEx);
    		Matcher m = p.matcher(html);
    		String s = m.replaceAll("");
    		return s;
    	}
    	
    	/**
    	 * 替换为手机识别的HTML，去掉样式及属性，保留回车。
    	 * @param html
    	 * @return
    	 */
    	public static String toMobileHtml(String html){
    		if (html == null){
    			return "";
    		}
    		return html.replaceAll("<([a-z]+?)\\s+?.*?>", "<$1>");
    	}
    	
    	/**
    	 * 对txt进行HTML编码，并将\n转换为>br/<、\t转换为   
    	 * @param txt
    	 * @return
    	 */
    	public static String toHtml(String txt){
    		if (txt == null){
    			return "";
    		}
    		return replace(replace(EncodeUtils.encodeHtml(trim(txt)), "\n", "<br/>"), "\t", "    ");
    	}
    
    	/**
    	 * 缩略字符串（不区分中英文字符）
    	 * @param str 目标字符串
    	 * @param length 截取长度
    	 * @return
    	 */
    	public static String abbr(String str, int length) {
    		if (str == null) {
    			return "";
    		}
    		try {
    			StringBuilder sb = new StringBuilder();
    			int currentLength = 0;
    			for (char c : stripHtml(StringEscapeUtils.unescapeHtml4(str)).toCharArray()) {
    				currentLength += String.valueOf(c).getBytes("GBK").length;
    				if (currentLength <= length - 3) {
    					sb.append(c);
    				} else {
    					sb.append("...");
    					break;
    				}
    			}
    			return sb.toString();
    		} catch (UnsupportedEncodingException e) {
    			e.printStackTrace();
    		}
    		return "";
    	}
    	
    	// 缩略字符串替换Html正则表达式预编译
    	private static Pattern p1 = Pattern.compile("<([a-zA-Z]+)[^<>]*>");
    	
    	/**
    	 * 缩略字符串（适应于与HTML标签的）
    	 * @param param 目标字符串
    	 * @param length 截取长度
    	 * @return
    	 */
    	public static String htmlAbbr(String param, int length) {
    		if (param == null) {
    			return "";
    		}
    		StringBuffer result = new StringBuffer();
    		int n = 0;
    		char temp;
    		boolean isCode = false; // 是不是HTML代码
    		boolean isHTML = false; // 是不是HTML特殊字符,如 
    		for (int i = 0; i < param.length(); i++) {
    			temp = param.charAt(i);
    			if (temp == '<') {
    				isCode = true;
    			} else if (temp == '&') {
    				isHTML = true;
    			} else if (temp == '>' && isCode) {
    				n = n - 1;
    				isCode = false;
    			} else if (temp == ';' && isHTML) {
    				isHTML = false;
    			}
    			try {
    				if (!isCode && !isHTML) {
    					n += String.valueOf(temp).getBytes("GBK").length;
    				}
    			} catch (UnsupportedEncodingException e) {
    				e.printStackTrace();
    			}
    
    			if (n <= length - 3) {
    				result.append(temp);
    			} else {
    				result.append("...");
    				break;
    			}
    		}
    		// 取出截取字符串中的HTML标记
    		String tempResult = result.toString().replaceAll("(>)[^<>]*(<?)", "$1$2");
    		// 去掉不需要结素标记的HTML标记
    		tempResult = tempResult.replaceAll("</?(AREA|BASE|BASEFONT|BODY|BR|COL|COLGROUP|DD|DT|FRAME|HEAD|HR|"
    				+ "HTML|IMG|INPUT|ISINDEX|LI|LINK|META|OPTION|P|PARAM|TBODY|TD|TFOOT|TH|THEAD|TR|area|base|"
    				+ "basefont|body|br|col|colgroup|dd|dt|frame|head|hr|html|img|input|isindex|li|link|meta|"
    				+ "option|p|param|tbody|td|tfoot|th|thead|tr)[^<>]*/?>", "");
    		// 去掉成对的HTML标记
    		tempResult = tempResult.replaceAll("<([a-zA-Z]+)[^<>]*>(.*?)</\\1>", "$2");
    		// 用正则表达式取出标记
    		Matcher m = p1.matcher(tempResult);
    		List<String> endHTML = ListUtils.newArrayList();
    		while (m.find()) {
    			endHTML.add(m.group(1));
    		}
    		// 补全不成对的HTML标记
    		for (int i = endHTML.size() - 1; i >= 0; i--) {
    			result.append("</");
    			result.append(endHTML.get(i));
    			result.append(">");
    		}
    		return result.toString();
    	}
    	
    	/**
    	 * 首字母大写
    	 */
    	public static String cap(String str){
    		return capitalize(str);
    	}
    	
    	/**
    	 * 首字母小写
    	 */
    	public static String uncap(String str){
    		return uncapitalize(str);
    	}
    	
    	/**
    	 * 驼峰命名法工具
    	 * @return
    	 * 		camelCase("hello_world") == "helloWorld" 
    	 * 		capCamelCase("hello_world") == "HelloWorld"
    	 * 		uncamelCase("helloWorld") = "hello_world"
    	 */
        public static String camelCase(String s) {
            if (s == null) {
                return null;
            }
    
            s = s.toLowerCase();
    
            StringBuilder sb = new StringBuilder(s.length());
            boolean upperCase = false;
            for (int i = 0; i < s.length(); i++) {
                char c = s.charAt(i);
    
                if (c == SEPARATOR) {
                    upperCase = true;
                } else if (upperCase) {
                    sb.append(Character.toUpperCase(c));
                    upperCase = false;
                } else {
                    sb.append(c);
                }
            }
    
            return sb.toString();
        }
    
        /**
    	 * 驼峰命名法工具
    	 * @return
    	 * 		camelCase("hello_world") == "helloWorld" 
    	 * 		capCamelCase("hello_world") == "HelloWorld"
    	 * 		uncamelCase("helloWorld") = "hello_world"
    	 */
        public static String capCamelCase(String s) {
            if (s == null) {
                return null;
            }
            s = camelCase(s);
            return s.substring(0, 1).toUpperCase() + s.substring(1);
        }
        
        /**
    	 * 驼峰命名法工具
    	 * @return
    	 * 		camelCase("hello_world") == "helloWorld" 
    	 * 		capCamelCase("hello_world") == "HelloWorld"
    	 * 		uncamelCase("helloWorld") = "hello_world"
    	 */
        public static String uncamelCase(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();
        }
        
        /**
         * 转换为JS获取对象值，生成三目运算返回结果
         * @param objectString 对象串
         *   例如：row.user.id
         *   返回：!row?'':!row.user?'':!row.user.id?'':row.user.id
         */
        public static String jsGetVal(String objectString){
        	StringBuilder result = new StringBuilder();
        	StringBuilder val = new StringBuilder();
        	String[] vals = split(objectString, ".");
        	for (int i=0; i<vals.length; i++){
        		val.append("." + vals[i]);
        		result.append("!"+(val.substring(1))+"?'':");
        	}
        	result.append(val.substring(1));
        	return result.toString();
        }
    
    	/**
    	 * 获取随机字符串
    	 * @param count
    	 * @return
    	 */
    	public static String getRandomStr(int count) {
    		char[] codeSeq = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
    				'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
    				'X', 'Y', 'Z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
    		Random random = new Random();
    		StringBuilder s = new StringBuilder();
    		for (int i = 0; i < count; i++) {
    			String r = String.valueOf(codeSeq[random.nextInt(codeSeq.length)]);
    			s.append(r);
    		}
    		return s.toString();
    	}
    
    	/**
    	 * 获取随机数字
    	 * @param count
    	 * @return
    	 */
    	public static String getRandomNum(int count) {
    		char[] codeSeq = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
    		Random random = new Random();
    		StringBuilder s = new StringBuilder();
    		for (int i = 0; i < count; i++) {
    			String r = String.valueOf(codeSeq[random.nextInt(codeSeq.length)]);
    			s.append(r);
    		}
    		return s.toString();
    	}
    	
    	/**
    	 * 获取树节点名字
    	 * @param isShowCode 是否显示编码<br>
    	 * 		true or 1：显示在左侧：(code)name<br>
    	 * 		2：显示在右侧：name(code)<br>
    	 * 		false or null：不显示编码：name
    	 * @param code 编码
    	 * @param name 名称
    	 * @return 
    	 */
    	public static String getTreeNodeName(String isShowCode, String code, String name) {
    		if ("true".equals(isShowCode) || "1".equals(isShowCode)) {
    			return "(" + code + ") " + StringUtils.replace(name, " ", "");
    		} else if ("2".equals(isShowCode)) {
    			return StringUtils.replace(name, " ", "") + " (" + code + ")";
    		} else {
    			return StringUtils.replace(name, " ", "");
    		}
    	}
    	
    	
    }