Java项目:博客论坛管理系统(java+SpringBoot+JSP+LayUI+maven+mysql)

package com.ruixin.common.utils; import java.io.File; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.List; import java.util.Locale; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.servlet.http.HttpServletRequest; import org.apache.commons.lang3.StringEscapeUtils; import org.springframework.core.io.DefaultResourceLoader; import org.springframework.web.context.request.RequestContextHolder; import org.springframework.web.context.request.ServletRequestAttributes; import org.springframework.web.servlet.LocaleResolver; import com.google.common.collect.Lists; 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 */ 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){ for (String s : strs){ if (str.equals(trim(s))){ return true; } } } return false; } /** * 替换掉HTML标签方法 */ public static String replaceHtml(String html) { if (isBlank(html)){ return ""; } 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 replaceMobileHtml(String html){ if (html == null){ return ""; } return html.replaceAll("<([a-z]+?)\\s+?.*?>", "<$1>"); } /** * 替换为手机识别的HTML，去掉样式及属性，保留回车。 * @param txt * @return */ /* public static String toHtml(String txt){ if (txt == null){ return ""; } return replace(replace(Encodes.escapeHtml(txt), "\n", "<br/>"), "\t", "&nbsp; &nbsp; "); }*/ /** * 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 : replaceHtml(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 ""; } public static String abbr2(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&nbsp; 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 temp_result = result.toString().replaceAll("(>)[^<>]*(<?)", "$1$2"); // 去掉不需要结素标记的HTML标记 temp_result = temp_result .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 temp_result = temp_result.replaceAll("<([a-zA-Z]+)[^<>]*>(.*?)</\\1>", "$2"); // 用正则表达式取出标记 Pattern p = Pattern.compile("<([a-zA-Z]+)[^<>]*>"); Matcher m = p.matcher(temp_result); List<String> endHTML = Lists.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(); } /** * 转换为Double类型 */ public static Double toDouble(Object val){ if (val == null){ return 0D; } try { return Double.valueOf(trim(val.toString())); } catch (Exception e) { return 0D; } } /** * 转换为Float类型 */ public static Float toFloat(Object val){ return toDouble(val).floatValue(); } /** * 转换为Long类型 */ public static Long toLong(Object val){ return toDouble(val).longValue(); } /** * 转换为Integer类型 */ public static Integer toInteger(Object val){ return toLong(val).intValue(); } /** * 获得i18n字符串 */ public static String getMessage(String code, Object[] args) { LocaleResolver localLocaleResolver = (LocaleResolver) SpringContextHolder.getBean(LocaleResolver.class); HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest(); Locale localLocale = localLocaleResolver.resolveLocale(request); return SpringContextHolder.getApplicationContext().getMessage(code, args, localLocale); } /** * 获得用户远程地址 */ public static String getRemoteAddr(HttpServletRequest request){ String remoteAddr = request.getHeader("X-Real-IP"); if (isNotBlank(remoteAddr)) { remoteAddr = request.getHeader("X-Forwarded-For"); }else if (isNotBlank(remoteAddr)) { remoteAddr = request.getHeader("Proxy-Client-IP"); }else if (isNotBlank(remoteAddr)) { remoteAddr = request.getHeader("WL-Proxy-Client-IP"); } return remoteAddr != null ? remoteAddr : request.getRemoteAddr(); } /** * 驼峰命名法工具 * @return * toCamelCase("hello_world") == "helloWorld" * toCapitalizeCamelCase("hello_world") == "HelloWorld" * toUnderScoreCase("helloWorld") = "hello_world" */ public static String toCamelCase(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 * toCamelCase("hello_world") == "helloWorld" * t