本文整理了Java中org.apache.commons.lang3.StringUtils.substringBefore()方法的一些代码示例，展示了StringUtils.substringBefore()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。StringUtils.substringBefore()方法的具体详情如下：
包路径：org.apache.commons.lang3.StringUtils
类名称：StringUtils
方法名：substringBefore

StringUtils.substringBefore介绍

[英]Gets the substring before the first occurrence of a separator. The separator is not returned.

A null string input will return null. An empty ("") string input will return the empty string. A null separator will return the input string.

If nothing is found, the string input is returned.

StringUtils.substringBefore(null, *)      = null 
StringUtils.substringBefore("", *)        = "" 
StringUtils.substringBefore("abc", "a")   = "" 
StringUtils.substringBefore("abcba", "b") = "a" 
StringUtils.substringBefore("abc", "c")   = "ab" 
StringUtils.substringBefore("abc", "d")   = "abc" 
StringUtils.substringBefore("abc", "")    = "" 
StringUtils.substringBefore("abc", null)  = "abc"

[中]获取第一次出现分隔符之前的子字符串。未返回分隔符。
空字符串输入将返回空值。空（“”）字符串输入将返回空字符串。空分隔符将返回输入字符串。
如果未找到任何内容，则返回字符串输入。

StringUtils.substringBefore(null, *)      = null 
StringUtils.substringBefore("", *)        = "" 
StringUtils.substringBefore("abc", "a")   = "" 
StringUtils.substringBefore("abcba", "b") = "a" 
StringUtils.substringBefore("abc", "c")   = "ab" 
StringUtils.substringBefore("abc", "d")   = "abc" 
StringUtils.substringBefore("abc", "")    = "" 
StringUtils.substringBefore("abc", null)  = "abc"

代码示例

代码示例来源：origin: xtuhcy/gecco

@Override
public void setUrl(String url) {
  this.url = StringUtils.substringBefore(url, "#");
}

代码示例来源：origin: joelittlejohn/jsonschema2pojo

protected URI removeFragment(URI id) {
  return URI.create(substringBefore(id.toString(), "#"));
}

代码示例来源：origin: languagetool-org/languagetool

private static List<byte[]> getLines(BufferedReader br) throws IOException {
 List<byte[]> lines = new ArrayList<>();
 String line;
 while ((line = br.readLine()) != null) {
  if (!line.startsWith("#")) {
   lines.add(StringUtils.substringBefore(line,"#").trim().getBytes(UTF_8));
  }
 }
 return lines;
}

代码示例来源：origin: jamesdbloom/mockserver

public static String returnPath(String path) {
    String result = "";
    if (URLParser.isFullUrl(path)) {
      result = path.replaceAll(schemeHostAndPortRegex, "");
    } else {
      result = path;
    }
    return StringUtils.substringBefore(result, "?");
  }
}

代码示例来源：origin: Activiti/Activiti

public Optional<ActionDefinition> find(String implementation){

    Optional<ActionDefinition> actionDefinitionOptional = Optional.empty();

    String connectorId = StringUtils.substringBefore(implementation,
                             ".");
    String actionId = StringUtils.substringAfter(implementation,
                           ".");

    List<ConnectorDefinition> resultingConnectors = connectorDefinitions.stream().filter(c -> c.getId().equals(connectorId)).collect(Collectors.toList());
    if (resultingConnectors != null && resultingConnectors.size() != 0) {
      if (resultingConnectors.size() != 1) {
        throw new RuntimeException("Mismatch connector id mapping: " + connectorId);
      }
      ConnectorDefinition connectorDefinition = resultingConnectors.get(0);

      ActionDefinition actionDefinition = connectorDefinition.getActions().get(actionId);
      if (actionDefinition == null) {
        throw new RuntimeException("Mismatch action id mapping: " + actionId);
      }

      actionDefinitionOptional = Optional.ofNullable(actionDefinition);
    }

    return actionDefinitionOptional;
  }
}

代码示例来源：origin: languagetool-org/languagetool

private static List<String> loadWordsFromPath(String filePath) throws IOException {
 List<String> result = new ArrayList<>();
 if (!JLanguageTool.getDataBroker().resourceExists(filePath)) {
  return result;
 }
 try (InputStream inputStream = JLanguageTool.getDataBroker().getFromResourceDirAsStream(filePath);
    Scanner scanner = new Scanner(inputStream, "utf-8")) {
  while (scanner.hasNextLine()) {
   String line = scanner.nextLine();
   if (line.isEmpty() || line.startsWith("#")) {
    continue;
   }
   if (line.trim().length() < line.length()) {
    throw new RuntimeException("No leading or trailing space expected in " + filePath + ": '" + line + "'");
   }
   result.add(StringUtils.substringBefore(line, "#"));
  }
 }
 return result;
}

代码示例来源：origin: xtuhcy/gecco

imageDir.mkdirs();
String fileName =  StringUtils.substringBefore(imgUrl, "?");
fileName = StringUtils.substringAfterLast(fileName, "/");
File imageFile = new File(imageDir, fileName);

代码示例来源：origin: org.apache.commons/commons-lang3

@Test
public void testSubstringBefore_StringString() {
  assertEquals("foo", StringUtils.substringBefore("fooXXbarXXbaz", "XX"));
  assertNull(StringUtils.substringBefore(null, null));
  assertNull(StringUtils.substringBefore(null, ""));
  assertNull(StringUtils.substringBefore(null, "XX"));
  assertEquals("", StringUtils.substringBefore("", null));
  assertEquals("", StringUtils.substringBefore("", ""));
  assertEquals("", StringUtils.substringBefore("", "XX"));
  assertEquals("foo", StringUtils.substringBefore("foo", null));
  assertEquals("foo", StringUtils.substringBefore("foo", "b"));
  assertEquals("f", StringUtils.substringBefore("foot", "o"));
  assertEquals("", StringUtils.substringBefore("abc", "a"));
  assertEquals("a", StringUtils.substringBefore("abcba", "b"));
  assertEquals("ab", StringUtils.substringBefore("abc", "c"));
  assertEquals("", StringUtils.substringBefore("abc", ""));
}

代码示例来源：origin: jamesdbloom/mockserver

public static void addSubjectAlternativeName(String host) {
  if (host != null) {
    String hostWithoutPort = StringUtils.substringBefore(host, ":");
    if (!ConfigurationProperties.containsSslSubjectAlternativeName(hostWithoutPort)) {
      try {
        // resolve host name for subject alternative name in case host name is ip address
        for (InetAddress addr : InetAddress.getAllByName(hostWithoutPort)) {
          ConfigurationProperties.addSslSubjectAlternativeNameIps(addr.getHostAddress());
          ConfigurationProperties.addSslSubjectAlternativeNameDomains(addr.getHostName());
          ConfigurationProperties.addSslSubjectAlternativeNameDomains(addr.getCanonicalHostName());
        }
      } catch (UnknownHostException uhe) {
        ConfigurationProperties.addSslSubjectAlternativeNameDomains(hostWithoutPort);
      }
    }
  }
}

代码示例来源：origin: apache/hbase

if (sb.length() > 0) {
 for (String columnName : sb.toString().trim().split(" ")) {
  String family = StringUtils.substringBefore(columnName, ":");
  String qualifier = StringUtils.substringAfter(columnName, ":");

代码示例来源：origin: joelittlejohn/jsonschema2pojo

String pathExcludingFragment = substringBefore(path, "#");
  String fragment = substringAfter(path, "#");
  URI fragmentURI;
if (selfReferenceWithoutParentFile(parent, path) || substringBefore(stringId, "#").isEmpty()) {
  JsonNode parentContent = parent.getParent().getContent();
  Schema schema = new Schema(id, fragmentResolver.resolve(parentContent, path, refFragmentPathDelimiters), parent.getParent());

代码示例来源：origin: xtuhcy/gecco

String before =  StringUtils.substringBefore(imgUrl, "?");
String last =  StringUtils.substringAfter(imgUrl, "?");
String fileName = StringUtils.substringAfterLast(before, "/");

代码示例来源：origin: joelittlejohn/jsonschema2pojo

String fqn = substringBefore(node.get("existingJavaType").asText(), "<");

代码示例来源：origin: Teradata/kylo

/**
 * Parse the category name from a full feed name  (category.feed)
 */
public static String category(String name) {
  return StringUtils.trim(StringUtils.substringBefore(name, "."));
}

代码示例来源：origin: didi/DDMQ

public static String getPackageName(String code) {
  String packageName =
    StringUtils.substringBefore(StringUtils.substringAfter(code, "package "), ";").trim();
  return packageName;
}

代码示例来源：origin: spring-projects/spring-roo

/**
 * Extracts the property defined in source. If any property is found returns null.
 * @param property
 * @return Pair of property metadata and property name
 */
public Pair<Stack<FieldMetadata>, String> extractValidField(String source,
  List<FieldMetadata> fields) {
 if (source == null) {
  return null;
 }
 source = StringUtils.substringBefore(source, "By");
 return currentPartTreeInstance.extractValidProperty(source, fields);
}

代码示例来源：origin: com.atlassian.plugins.rest/atlassian-rest-common

private static String getSanitisedReferrer(final ContainerRequest request) {
  return StringUtils.substringBefore(request.getHeaderValue("Referer"), "?");
}

代码示例来源：origin: com.atlassian.plugins.rest/atlassian-rest-common

static Indexes parse(String indexes) {
  if (StringUtils.isBlank(indexes)) {
    return ALL;
  } else if (INDEX_PATTERN.matcher(indexes).matches()) {
    return new SimpleIndexes(Integer.parseInt(indexes));
  } else if (RANGE_PATTERN.matcher(indexes).matches()) {
    final String leftAsString = StringUtils.substringBefore(indexes, ":");
    final String rightAsString = StringUtils.substringAfter(indexes, ":");
    return new RangeIndexes(
        StringUtils.isNotBlank(leftAsString) ? Integer.parseInt(leftAsString) : null,
        StringUtils.isNotBlank(rightAsString) ? Integer.parseInt(rightAsString) : null);
  } else {
    return EMPTY;
  }
}

代码示例来源：origin: com.atlassian.plugins.rest/atlassian-rest-common

void logXsrfFailureButNotBeingEnforced(ContainerRequest request, Logger logger) {
  final String key = request.getPath();
  if (key != null && XSRF_NOT_ENFORCED_RESOURCE_CACHE.getIfPresent(key) == null) {
    logger.warn(
      "XSRF failure not being enforced for request: {} , origin: {} , referrer: {}, " +
        "method: {}",
      StringUtils.substringBefore(request.getRequestUri().toString(), "?"),
      request.getHeaderValue(CorsHeaders.ORIGIN.value()),
      getSanitisedReferrer(request),
      request.getMethod()
    );
    XSRF_NOT_ENFORCED_RESOURCE_CACHE.put(key, Boolean.TRUE);
  }
}

代码示例来源：origin: com.atlassian.plugins.rest/atlassian-rest-common

private static void appendParam(Map<String, ExpandInformation> parameters, String expand) {
  final ExpandKey key = ExpandKey.from(StringUtils.substringBefore(expand, DOT));
  String newParameter = StringUtils.substringAfter(expand, DOT);
  DefaultExpandParameter existingParameter = null;
  if (parameters.containsKey(key.getName())) {
    existingParameter = parameters.get(key.getName()).getExpandParameter();
  } else {
    existingParameter = new DefaultExpandParameter();
    parameters.put(key.getName(), new ExpandInformation(key.getIndexes(), existingParameter));
  }
  if (StringUtils.isNotBlank(newParameter)) {
    appendParam(existingParameter.parameters, newParameter);
  }
}