Java StringUtils.substring方法代码示例

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
/**
 * 一个简单的签名认证，规则：
 * 1. 将请求参数按ascii码排序
 * 2. 拼接为a=value&b=value...这样的字符串（不包含sign）
 * 3. 混合密钥（secret）进行md5获得签名，与请求的签名进行比较
 */
private boolean validateSign(HttpServletRequest request) {
    String requestSign = request.getParameter("sign");//获得请求签名，如sign=19e907700db7ad91318424a97c54ed57
    if (StringUtils.isEmpty(requestSign)) {
        return false;
    }
    List<String> keys = new ArrayList<String>(request.getParameterMap().keySet());
    keys.remove("sign");//排除sign参数
    Collections.sort(keys);//排序

    StringBuilder sb = new StringBuilder();
    for (String key : keys) {
        sb.append(key).append("=").append(request.getParameter(key)).append("&");//拼接字符串
    }
    String linkString = sb.toString();
    linkString = StringUtils.substring(linkString, 0, linkString.length() - 1);//去除最后一个'&'

    String secret = "Potato";//密钥，自己修改
    String sign = DigestUtils.md5Hex(linkString + secret);//混合密钥md5

    return StringUtils.equals(sign, requestSign);//比较
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
/**
 * 从响应消息的Content-Disposition头中获得文件名。
 * 
 * @param headers
 * @return 如果不是文件则返回null
 */
private static String getResponseFileName(Header[] headers) {
	String filename = null;
	if (headers == null) {
		return null;
	}
	for (Header header : headers) {
		if (StringUtils.equalsIgnoreCase(header.getName(), "Content-Disposition")) {
			String value = header.getValue();
			String key = "filename=";
			int keyLength = key.length();
			int position = StringUtils.indexOfIgnoreCase(header.getValue(), key);
			if (position > -1) {
				filename = StringUtils.substring(value, position + keyLength);
			}
			break;
		}
	}
	return filename;
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
/**
 * Extracts the username from the specified DN. If the username cannot be extracted because the CN is in an unrecognized format, the entire CN is returned. If the CN cannot be extracted because
 * the DN is in an unrecognized format, the entire DN is returned.
 *
 * @param dn the dn to extract the username from
 * @return the exatracted username
 */
public static String extractUsername(String dn) {
    String username = dn;

    // ensure the dn is specified
    if (StringUtils.isNotBlank(dn)) {
        // determine the separate
        final String separator = StringUtils.indexOfIgnoreCase(dn, "/cn=") > 0 ? "/" : ",";

        // attempt to locate the cd
        final String cnPattern = "cn=";
        final int cnIndex = StringUtils.indexOfIgnoreCase(dn, cnPattern);
        if (cnIndex >= 0) {
            int separatorIndex = StringUtils.indexOf(dn, separator, cnIndex);
            if (separatorIndex > 0) {
                username = StringUtils.substring(dn, cnIndex + cnPattern.length(), separatorIndex);
            } else {
                username = StringUtils.substring(dn, cnIndex + cnPattern.length());
            }
        }
    }

    return username;
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
/**
 * 一个简单的签名认证，规则：
 * 1. 将请求参数按ascii码排序
 * 2. 拼接为a=value&b=value...这样的字符串（不包含sign）
 * 3. 混合密钥（secret）进行md5获得签名，与请求的签名进行比较
 */
private boolean validateSign(HttpServletRequest request) {
    String requestSign = request.getParameter("sign");//获得请求签名，如sign=19e907700db7ad91318424a97c54ed57
    if (StringUtils.isEmpty(requestSign)) {
        return false;
    }
    List<String> keys = new ArrayList<String>(request.getParameterMap().keySet());
    keys.remove("sign");        //排除sign参数
    Collections.sort(keys);     //排序

    StringBuilder sb = new StringBuilder();
    for (String key : keys) {
        sb.append(key).append("=").append(request.getParameter(key)).append("&");//拼接字符串
    }
    String linkString = sb.toString();
    linkString = StringUtils.substring(linkString, 0, linkString.length() - 1);//去除最后一个'&'

    String secret = "Potato";   //密钥，自己修改
    String sign = DigestUtils.md5Hex(linkString + secret);//混合密钥md5

    return StringUtils.equals(sign, requestSign);//比较
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
public static String relativize(String root, final String path) {
    if(StringUtils.isBlank(root)) {
        return path;
    }
    if(!StringUtils.equals(root, String.valueOf(Path.DELIMITER))) {
        root = root + String.valueOf(Path.DELIMITER);
    }
    if(StringUtils.contains(path, root)) {
        return StringUtils.substring(path, path.indexOf(root) + root.length());
    }
    return path;
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
public RequestIdManager(String serviceId) {
  if (serviceId == null) {
    serviceIdTag = "9999";
  }
  if (serviceId.length() > SERVICE_ID_TAG_LENGTH) {
    serviceIdTag = StringUtils
        .substring(serviceId, serviceId.length() - SERVICE_ID_TAG_LENGTH, serviceId.length() - 1);
  } else {
    serviceIdTag = StringUtils.leftPad(serviceId, SERVICE_ID_TAG_LENGTH, '0');
  }
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
public static void parse(String js) {
    if (StringUtils.isBlank(js)) {
        return;
    }

    String str = StringUtils.substring(js, js.indexOf("'") + 1, js.lastIndexOf("'"));
    String[] arr = str.split("@");
    Map<String, List<Station>> result = Arrays.stream(arr).filter(s -> StringUtils.isNotBlank(s)).map(s -> {
        String[] stations = s.split("\\|");
        return new Station(stations[0], stations[1], stations[2], stations[3]);
    }).collect(Collectors.groupingBy(station -> station.getName()));

    stationMaps = result;
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
public static String determineQualifier(RiskClass riskClass, Sensitivity sensitivity) {
  String qualifier = sensitivity.getQualifier();

  if (RiskClass.FX.equals(riskClass)) {
    String ccy1 = StringUtils.substring(qualifier, 0, 3);
    String ccy2 = StringUtils.substring(qualifier, 3, 6);
    qualifier = Arrays.asList(ccy1, ccy2).stream().sorted().reduce((s1, s2) -> {
      return s1 + s2;
    }).get();
  }
  return qualifier;
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
@Override
public String relativize(final String base, final String name) {
    final String parent = PathNormalizer.parent(base, Path.DELIMITER);
    if(name.startsWith(parent)) {
        return StringUtils.substring(name, parent.length() + 1);
    }
    else {
        return String.format("..%s%s", Path.DELIMITER, this.relativize(parent, name));
    }
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
private String unquote(String str) {
if (isQuoted(str)) {
    return StringUtils.substring(str, 1, -1);
} else {
    return str;
}
   }
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
private String extractVariableName(String path, int start, int end, Set<String> variables) {
    String substring = StringUtils.substring(path, start, end);
    String stripped = StringUtils.strip(substring, "{}");
    String variable = StringUtils.substringBefore(stripped, ":");
    variables.add(variable);
    return String.format("${%s}", variable);
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
public static String formatPostcode(String postcode) {
    String formattedPostcode = StringUtils.deleteWhitespace(postcode.toUpperCase());

    if ((formattedPostcode.length() >= 5) && (formattedPostcode.length() <= 7)) {
        formattedPostcode =
                StringUtils.substring(formattedPostcode, 0, formattedPostcode.length() - 3)
                        + " "
                        + StringUtils.substring(formattedPostcode, formattedPostcode.length() - 3);
    }

    return formattedPostcode;
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
private String slugifyTitle(String title) {
	return StringUtils.substring(slugify.slugify(title), 0, 20);
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
public static String generateSummary(String content) {
    String summary = StringEscapeUtils.escapeXml(content);
    summary = StringUtils.substring(summary, 0, 50);
    return summary;
}
 

import org.apache.commons.lang3.StringUtils; //导入方法依赖的package包/类
public String fixAliasForBean(String alias) {
if (alias.startsWith("\"") && alias.endsWith("\"")) {
    return StringUtils.substring(alias, 1, -1);
}
return alias;
   }