org.apache.commons.lang3.StringUtils.left()方法的使用及代码示例

x33g5p2x  于2022-01-17 转载在 其他  
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本文整理了Java中org.apache.commons.lang3.StringUtils.left()方法的一些代码示例，展示了StringUtils.left()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.left()方法的具体详情如下：
包路径：org.apache.commons.lang3.StringUtils
类名称：StringUtils
方法名：left

StringUtils.left介绍

[英]Gets the leftmost len characters of a String.

If len characters are not available, or the String is null, the String will be returned without an exception. An empty String is returned if len is negative.

StringUtils.left(null, *)    = null 
StringUtils.left(*, -ve)     = "" 
StringUtils.left("", *)      = "" 
StringUtils.left("abc", 0)   = "" 
StringUtils.left("abc", 2)   = "ab" 
StringUtils.left("abc", 4)   = "abc"

[中]获取字符串最左边的len字符。
如果len字符不可用，或者字符串为null，则将返回该字符串，而不会出现异常。如果len为负，则返回空字符串。

StringUtils.left(null, *)    = null 
StringUtils.left(*, -ve)     = "" 
StringUtils.left("", *)      = "" 
StringUtils.left("abc", 0)   = "" 
StringUtils.left("abc", 2)   = "ab" 
StringUtils.left("abc", 4)   = "abc"

代码示例

代码示例来源：origin: gocd/gocd

public String limit(String code, int limit) {
    if (code == null) {
      return "";
    }
    String lefted = StringUtils.left(code, limit);
    if (code.length() > limit) {
      lefted = lefted + "...";
    }
    return lefted;
  }
}

代码示例来源：origin: apache/phoenix

/**
 * Add a numerically increasing counter onto the and of a random string.
 * Incremented counter should be thread safe.
 *
 * @param column {@link org.apache.phoenix.pherf.configuration.Column}
 * @return {@link org.apache.phoenix.pherf.rules.DataValue}
 */
private DataValue getSequentialDataValue(Column column) {
  DataValue data = null;
  long inc = COUNTER.getAndIncrement();
  String strInc = String.valueOf(inc);
  int paddedLength = column.getLengthExcludingPrefix();
  String strInc1 = StringUtils.leftPad(strInc, paddedLength, "0");
  String strInc2 = StringUtils.right(strInc1, column.getLengthExcludingPrefix());
  String varchar = (column.getPrefix() != null) ? column.getPrefix() + strInc2:
      strInc2;
  
  // Truncate string back down if it exceeds length
  varchar = StringUtils.left(varchar,column.getLength());
  data = new DataValue(column.getType(), varchar);
  return data;
}

代码示例来源：origin: selenide/selenide

private String trimQuery(String fullFileName) {
 return fullFileName.contains("?")
  ? StringUtils.left(fullFileName, fullFileName.indexOf("?"))
  : fullFileName;
}

代码示例来源：origin: BroadleafCommerce/BroadleafCommerce

public TableCreator addRow(Object[] data) {
  if (data.length != cols.length) {
    throw new IllegalArgumentException("Wrong number of data elements. Needed [" + cols.length + "] " +
        "but received [" + data.length + "]");
  }
  
  sb.append('|');
  
  for (int i = 0; i < data.length; i++) {
    String trimmed = StringUtils.left(String.valueOf(data[i]), cols[i].width);
    sb.append(' ').append(StringUtils.rightPad(trimmed, cols[i].width)).append(" |");
  }
  
  sb.append("\r\n");
  return this;
}

代码示例来源：origin: BroadleafCommerce/BroadleafCommerce

public TableCreator addRow(String rowHeader, Object rowData) {
  String trimmed = StringUtils.left(rowHeader, globalRowHeaderWidth);
  sb.append("| ")
    .append(StringUtils.rightPad(trimmed, globalRowHeaderWidth))
    .append(StringUtils.rightPad(String.valueOf(rowData), rowWidth - globalRowHeaderWidth - 3))
    .append("|\r\n");
  return this;
}

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

@Test
public void testLeft_String() {
  assertSame(null, StringUtils.left(null, -1));
  assertSame(null, StringUtils.left(null, 0));
  assertSame(null, StringUtils.left(null, 2));
  assertEquals("", StringUtils.left("", -1));
  assertEquals("", StringUtils.left("", 0));
  assertEquals("", StringUtils.left("", 2));
  assertEquals("", StringUtils.left(FOOBAR, -1));
  assertEquals("", StringUtils.left(FOOBAR, 0));
  assertEquals(FOO, StringUtils.left(FOOBAR, 3));
  assertSame(FOOBAR, StringUtils.left(FOOBAR, 80));
}

代码示例来源：origin: apache/nifi

private void createConfigureDetails(int actionId, ConfigureDetails configurationDetails) throws DataAccessException {
  PreparedStatement statement = null;
  try {
    // obtain a statement to insert to the processor action table
    statement = connection.prepareStatement(INSERT_CONFIGURE_DETAILS);
    statement.setInt(1, actionId);
    statement.setString(2, StringUtils.left(configurationDetails.getName(), 1000));
    statement.setString(3, StringUtils.left(configurationDetails.getValue(), 5000));
    statement.setString(4, StringUtils.left(configurationDetails.getPreviousValue(), 5000));
    // insert the action
    int updateCount = statement.executeUpdate();
    // ensure the operation completed successfully
    if (updateCount != 1) {
      throw new DataAccessException("Unable to insert configure details.");
    }
  } catch (SQLException sqle) {
    throw new DataAccessException(sqle);
  } finally {
    RepositoryUtils.closeQuietly(statement);
  }
}

代码示例来源：origin: apache/nifi

private void createConnectDetails(int actionId, ConnectDetails connectionDetails) throws DataAccessException {
  PreparedStatement statement = null;
  try {
    // obtain a statement to insert to the processor action table
    statement = connection.prepareStatement(INSERT_CONNECT_DETAILS);
    statement.setInt(1, actionId);
    statement.setString(2, connectionDetails.getSourceId());
    statement.setString(3, StringUtils.left(connectionDetails.getSourceName(), 1000));
    statement.setString(4, StringUtils.left(connectionDetails.getSourceType().toString(), 1000));
    statement.setString(5, StringUtils.left(connectionDetails.getRelationship(), 1000));
    statement.setString(6, connectionDetails.getDestinationId());
    statement.setString(7, StringUtils.left(connectionDetails.getDestinationName(), 1000));
    statement.setString(8, StringUtils.left(connectionDetails.getDestinationType().toString(), 1000));
    // insert the action
    int updateCount = statement.executeUpdate();
    // ensure the operation completed successfully
    if (updateCount != 1) {
      throw new DataAccessException("Unable to insert connection details.");
    }
  } catch (SQLException sqle) {
    throw new DataAccessException(sqle);
  } finally {
    RepositoryUtils.closeQuietly(statement);
  }
}

代码示例来源：origin: apache/nifi

private void createExtensionDetails(int actionId, ExtensionDetails extensionDetails) throws DataAccessException {
  PreparedStatement statement = null;
  try {
    // obtain a statement to insert to the extension action table
    statement = connection.prepareStatement(INSERT_EXTENSION_DETAILS);
    statement.setInt(1, actionId);
    statement.setString(2, StringUtils.left(extensionDetails.getType(), 1000));
    // insert the action
    int updateCount = statement.executeUpdate();
    // ensure the operation completed successfully
    if (updateCount != 1) {
      throw new DataAccessException("Unable to insert extension details.");
    }
  } catch (SQLException sqle) {
    throw new DataAccessException(sqle);
  } finally {
    RepositoryUtils.closeQuietly(statement);
  }
}

代码示例来源：origin: apache/nifi

private void createRemoteProcessGroupDetails(int actionId, RemoteProcessGroupDetails remoteProcessGroupDetails) throws DataAccessException {
  PreparedStatement statement = null;
  try {
    // obtain a statement to insert to the processor action table
    statement = connection.prepareStatement(INSERT_REMOTE_PROCESS_GROUP_DETAILS);
    statement.setInt(1, actionId);
    statement.setString(2, StringUtils.left(remoteProcessGroupDetails.getUri(), 2500));
    // insert the action
    int updateCount = statement.executeUpdate();
    // ensure the operation completed successfully
    if (updateCount != 1) {
      throw new DataAccessException("Unable to insert remote prcoess group details.");
    }
  } catch (SQLException sqle) {
    throw new DataAccessException(sqle);
  } finally {
    RepositoryUtils.closeQuietly(statement);
  }
}

代码示例来源：origin: apache/nifi

private void createMoveDetails(int actionId, MoveDetails moveDetails) throws DataAccessException {
  PreparedStatement statement = null;
  try {
    // obtain a statement to insert to the processor action table
    statement = connection.prepareStatement(INSERT_MOVE_DETAILS);
    statement.setInt(1, actionId);
    statement.setString(2, moveDetails.getGroupId());
    statement.setString(3, StringUtils.left(moveDetails.getGroup(), 1000));
    statement.setString(4, moveDetails.getPreviousGroupId());
    statement.setString(5, StringUtils.left(moveDetails.getPreviousGroup(), 1000));
    // insert the action
    int updateCount = statement.executeUpdate();
    // ensure the operation completed successfully
    if (updateCount != 1) {
      throw new DataAccessException("Unable to insert move details.");
    }
  } catch (SQLException sqle) {
    throw new DataAccessException(sqle);
  } finally {
    RepositoryUtils.closeQuietly(statement);
  }
}

代码示例来源：origin: jamesagnew/hapi-fhir

public void setName(String theName) {
  myName = left(theName, CS_NAME_LENGTH);
}

代码示例来源：origin: jamesagnew/hapi-fhir

public void setFailureMessage(String theFailureMessage) {
  myFailureMessage = left(theFailureMessage, FAILURE_MESSAGE_LENGTH);
}

代码示例来源：origin: apache/nifi

statement.setString(1, StringUtils.left(action.getUserIdentity(), 4096));
statement.setString(2, action.getSourceId());
statement.setString(3, StringUtils.left(action.getSourceName(), 1000));
statement.setString(4, action.getSourceType().name());
statement.setString(5, action.getOperation().name());

代码示例来源：origin: jamesagnew/hapi-fhir

public static long calculateHashNormalized(ModelConfig theModelConfig, String theResourceType, String theParamName, String theValueNormalized) {
  /*
   * If we're not allowing contained searches, we'll add the first
   * bit of the normalized value to the hash. This helps to
   * make the hash even more unique, which will be good for
   * performance.
   */
  int hashPrefixLength = HASH_PREFIX_LENGTH;
  if (theModelConfig.isAllowContainsSearches()) {
    hashPrefixLength = 0;
  }
  return hash(theResourceType, theParamName, left(theValueNormalized, hashPrefixLength));
}

代码示例来源：origin: palantir/atlasdb

@Test(expected = RuntimeException.class)
public void throwWhenCreatingDifferentLongTablesWithSameFirstCharactersUntilTheTableNameLimit() {
  String tableNameForFirstSixtyCharactersToBeSame = StringUtils.left(TEST_LONG_TABLE_NAME,
      PostgresDdlTable.ATLASDB_POSTGRES_TABLE_NAME_LIMIT - TEST_NAMESPACE.getName().length()
          - TWO_UNDERSCORES);
  createTwoTablesWithSamePrefix(tableNameForFirstSixtyCharactersToBeSame);
}

代码示例来源：origin: palantir/atlasdb

@Test
public void shouldNotThrowWhenCreatingDifferentLongTablesWithSameFirstCharactersUntilOneLessThanTableNameLimit() {
  String tableNameForFirstFiftyNineCharactersToBeSame = StringUtils.left(TEST_LONG_TABLE_NAME,
      PostgresDdlTable.ATLASDB_POSTGRES_TABLE_NAME_LIMIT - TEST_NAMESPACE.getName().length()
          - TWO_UNDERSCORES - 1);
  createTwoTablesWithSamePrefix(tableNameForFirstFiftyNineCharactersToBeSame);
}

代码示例来源：origin: apache/phoenix

private DataValue getRandomDataValue(Column column) {
    String varchar = RandomStringUtils.randomAlphanumeric(column.getLength());
    varchar = (column.getPrefix() != null) ? column.getPrefix() + varchar : varchar;

    // Truncate string back down if it exceeds length
    varchar = StringUtils.left(varchar, column.getLength());
    return new DataValue(column.getType(), varchar);
  }
}

代码示例来源：origin: info.magnolia/magnolia-core

protected String getParentPath(String name) {
    final String lcName = name.toLowerCase();
    if (lcName.length() == 1) {
      return "/" + lcName.charAt(0);
    }
    return "/" + lcName.charAt(0) + "/" + StringUtils.left(lcName, 2);
  }
}

代码示例来源：origin: org.xworker/xworker_core

public static String left(ActionContext actionContext){
  Thing self = actionContext.getObject("self");
  String str  = (String) self.doAction("getStr", actionContext);
  Integer len  = (Integer) self.doAction("getLen", actionContext);
  return StringUtils.left(str, len);
}

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