本文整理了Java中java.util.Properties.setProperty()方法的一些代码示例，展示了Properties.setProperty()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。Properties.setProperty()方法的具体详情如下：
包路径：java.util.Properties
类名称：Properties
方法名：setProperty

Properties.setProperty介绍

[英]Maps the specified key to the specified value. If the key already exists, the old value is replaced. The key and value cannot be null.
[中]将指定的键映射到指定的值。如果密钥已存在，则替换旧值。键和值不能为null。

代码示例

代码示例来源：origin: stanfordnlp/CoreNLP

public static Properties overWriteProperties(Properties bp, Properties ovp) {
 for (String propertyName : ovp.stringPropertyNames()) {
  bp.setProperty(propertyName,ovp.getProperty(propertyName));
 }
 return bp;
}

代码示例来源：origin: stanfordnlp/CoreNLP

private static Properties updatePropertiesWithOptions(Properties props, String[] args) {
 Properties allProperties = new Properties();
 // copy it so props isn't changed but can be overridden by args
 for (String key : props.stringPropertyNames()) {
  allProperties.setProperty(key, props.getProperty(key));
 }
 Properties options = StringUtils.argsToProperties(args);
 for (String key : options.stringPropertyNames()) {
  allProperties.setProperty(key, options.getProperty(key));
 }
 return allProperties;
}

代码示例来源：origin: dieforfree/qart4j

private static void configLog(String configFile) {
    if(new File(configFile).exists()) {
      PropertyConfigurator.configure(configFile);
      return;
    }

    Properties properties = new Properties();

    properties.setProperty("log4j.rootLogger", "DEBUG, CA");
    properties.setProperty("log4j.appender.CA", "org.apache.log4j.ConsoleAppender");
    properties.setProperty("log4j.appender.CA.layout", "org.apache.log4j.PatternLayout");
    properties.setProperty("log4j.appender.CA.layout.ConversionPattern", "%d{yyyy-MM-dd HH:mm:ss.SSS} %-4r [%t] %-5p %c %x - %m%n");
    PropertyConfigurator.configure(properties);
  }
}

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

@Test
public void testWithMultipleProperties() {
  String text = "foo=${foo},bar=${bar}";
  Properties props = new Properties();
  props.setProperty("foo", "bar");
  props.setProperty("bar", "baz");
  assertEquals("foo=bar,bar=baz", this.helper.replacePlaceholders(text, props));
}

代码示例来源：origin: apache/ignite

/**
 * @throws Exception If failed.
 */
@Test
public void testCache1() throws Exception {
  Properties cfg = new Properties();
  cfg.setProperty(PROP_NODE_ID, grid(0).localNode().id().toString());
  Connection conn = null;
  try {
    conn = DriverManager.getConnection(URL, cfg);
    ResultSet rs = conn.createStatement().executeQuery("select _val from Integer order by _val");
    int cnt = 0;
    while (rs.next())
      assertEquals(++cnt, rs.getInt(1));
    assertEquals(2, cnt);
  }
  finally {
    if (conn != null)
      conn.close();
  }
}

代码示例来源：origin: robovm/robovm

/**
 * Attempts to establish a connection to the given database URL.
 *
 * @param url
 *            a URL string representing the database target to connect with.
 * @param user
 *            a user ID used to login to the database.
 * @param password
 *            a password for the user ID to login to the database.
 * @return a {@code Connection} to the database identified by the URL.
 *         {@code null} if no connection can be established.
 * @throws SQLException
 *             if there is an error while attempting to connect to the
 *             database identified by the URL.
 */
public static Connection getConnection(String url, String user, String password)
    throws SQLException {
  Properties theProperties = new Properties();
  if (user != null) {
    theProperties.setProperty("user", user);
  }
  if (password != null) {
    theProperties.setProperty("password", password);
  }
  return getConnection(url, theProperties);
}

代码示例来源：origin: apache/incubator-gobblin

private Properties getProperties()
   throws IOException {
  Properties jobProperties =
    GobblinLocalJobLauncherUtils.getJobProperties("runtime_test/writer_output_format_test.properties");
  FileUtils.copyFile(new File(GobblinLocalJobLauncherUtils.RESOURCE_DIR + SAMPLE_FILE),
    new File(GobblinLocalJobLauncherUtils.RESOURCE_DIR + GobblinLocalJobLauncherUtils.SAMPLE_DIR + SAMPLE_FILE));
  jobProperties.setProperty(ConfigurationKeys.SOURCE_FILEBASED_FILES_TO_PULL,
    GobblinLocalJobLauncherUtils.RESOURCE_DIR + GobblinLocalJobLauncherUtils.SAMPLE_DIR + SAMPLE_FILE);
  return jobProperties;
 }
}

代码示例来源：origin: ehcache/ehcache3

@Test
public void testSysPropReplace() {
 System.getProperties().setProperty("ehcache.match", Number.class.getName());
 XmlConfiguration xmlConfig = new XmlConfiguration(XmlConfigurationTest.class.getResource("/configs/systemprops.xml"));
 assertThat(xmlConfig.getCacheConfigurations().get("bar").getKeyType(), sameInstance((Class)Number.class));
 DefaultPersistenceConfiguration persistenceConfiguration = (DefaultPersistenceConfiguration)xmlConfig.getServiceCreationConfigurations().iterator().next();
 assertThat(persistenceConfiguration.getRootDirectory(), is(new File(System.getProperty("user.home") + "/ehcache")));
}

代码示例来源：origin: alibaba/nacos

public static void updateTerm(long term) throws Exception {
  File file = new File(META_FILE_NAME);
  if (!file.exists() && !file.getParentFile().mkdirs() && !file.createNewFile()) {
    throw new IllegalStateException("failed to create meta file");
  }
  try (FileOutputStream outStream = new FileOutputStream(file)) {
    // write meta
    meta.setProperty("term", String.valueOf(term));
    meta.store(outStream, null);
  }
}

代码示例来源：origin: neo4j/neo4j

/**
 * Stores the data in {@code config} into {@code stream} in a standard java
 * {@link Properties} format.
 * @param config the data to store in the properties file.
 * @param stream the {@link OutputStream} to store the properties in.
 * @throws IOException IO error.
 */
public static void store( Map<String, String> config, OutputStream stream ) throws IOException
{
  Properties properties = new Properties();
  for ( Map.Entry<String, String> property : config.entrySet() )
  {
    properties.setProperty( property.getKey(), property.getValue() );
  }
  properties.store( stream, null );
}

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

@Test
public void testRecurseInProperty() {
  String text = "foo=${bar}";
  Properties props = new Properties();
  props.setProperty("bar", "${baz}");
  props.setProperty("baz", "bar");
  assertEquals("foo=bar", this.helper.replacePlaceholders(text, props));
}

代码示例来源：origin: org.testng/testng

private File referenceSuite(XMLStringBuffer xmlBuffer, ISuite suite) {
 String relativePath = suite.getName() + File.separatorChar + FILE_NAME;
 File suiteFile = new File(config.getOutputDirectory(), relativePath);
 Properties attrs = new Properties();
 attrs.setProperty(XMLReporterConfig.ATTR_URL, relativePath);
 xmlBuffer.addEmptyElement(XMLReporterConfig.TAG_SUITE, attrs);
 return suiteFile;
}

代码示例来源：origin: apache/ignite

/**
 * @throws Exception If failed.
 */
@Test
public void testCache1() throws Exception {
  Properties cfg = new Properties();
  cfg.setProperty(PROP_NODE_ID, grid(0).localNode().id().toString());
  Connection conn = null;
  try {
    conn = DriverManager.getConnection(BASE_URL, cfg);
    ResultSet rs = conn.createStatement().executeQuery("select _val from Integer order by _val");
    int cnt = 0;
    while (rs.next())
      assertEquals(++cnt, rs.getInt(1));
    assertEquals(2, cnt);
  }
  finally {
    if (conn != null)
      conn.close();
  }
}

代码示例来源：origin: apache/ignite

/**
 * @param allowOverwrite Allow overwriting of existing keys.
 * @return Connection to use for the test.
 * @throws Exception if failed.
 */
protected Connection createConnection(boolean allowOverwrite) throws Exception {
  Properties props = new Properties();
  props.setProperty(IgniteJdbcDriver.PROP_STREAMING, "true");
  props.setProperty(IgniteJdbcDriver.PROP_STREAMING_FLUSH_FREQ, "500");
  if (allowOverwrite)
    props.setProperty(IgniteJdbcDriver.PROP_STREAMING_ALLOW_OVERWRITE, "true");
  return DriverManager.getConnection(BASE_URL, props);
}

代码示例来源：origin: spring-cloud-incubator/spring-cloud-alibaba

@Override
public NacosDataSource getObject() throws Exception {
  if (!StringUtils.isEmpty(System.getProperties()
      .getProperty(SentinelDataSourceConstants.NACOS_DATASOURCE_ENDPOINT))) {
    Properties properties = new Properties();
    properties.setProperty(PropertyKeyConst.ACCESS_KEY, this.accessKey);
    properties.setProperty(PropertyKeyConst.SERVER_ADDR, this.secretKey);
    properties.setProperty(PropertyKeyConst.ENDPOINT, this.endpoint);
    properties.setProperty(PropertyKeyConst.NAMESPACE, this.namespace);
    return new NacosDataSource(properties, groupId, dataId, converter);
  }
  return new NacosDataSource(serverAddr, groupId, dataId, converter);
}

代码示例来源：origin: apache/incubator-gobblin

private Properties getProperties()
   throws IOException {
  Properties jobProperties =
    GobblinLocalJobLauncherUtils.getJobProperties("runtime_test/task_skip_err_records.properties");
  FileUtils.copyFile(new File(GobblinLocalJobLauncherUtils.RESOURCE_DIR + SAMPLE_FILE),
    new File(GobblinLocalJobLauncherUtils.RESOURCE_DIR + GobblinLocalJobLauncherUtils.SAMPLE_DIR + SAMPLE_FILE));
  jobProperties.setProperty(ConfigurationKeys.SOURCE_FILEBASED_FILES_TO_PULL,
    GobblinLocalJobLauncherUtils.RESOURCE_DIR + GobblinLocalJobLauncherUtils.SAMPLE_DIR + SAMPLE_FILE);
  return jobProperties;
 }
}

代码示例来源：origin: stackoverflow.com

FileInputStream in = new FileInputStream("First.properties");
Properties props = new Properties();
props.load(in);
in.close();

FileOutputStream out = new FileOutputStream("First.properties");
props.setProperty("country", "america");
props.store(out, null);
out.close();

代码示例来源：origin: stanfordnlp/CoreNLP

public static Properties noClobberWriteProperties(Properties bp, Properties ovp) {
 for (String propertyName : ovp.stringPropertyNames()) {
  if (bp.containsKey(propertyName))
   continue;
  bp.setProperty(propertyName,ovp.getProperty(propertyName));
 }
 return bp;
}

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

@Test
public void testUnresolvedPlaceholderIsIgnored() {
  String text = "foo=${foo},bar=${bar}";
  Properties props = new Properties();
  props.setProperty("foo", "bar");
  assertEquals("foo=bar,bar=${bar}", this.helper.replacePlaceholders(text, props));
}

代码示例来源：origin: org.testng/testng

private File referenceSuiteResult(XMLStringBuffer xmlBuffer, String parentDir, ISuiteResult suiteResult) {
 Properties attrs = new Properties();
 String suiteResultName = suiteResult.getTestContext().getName() + ".xml";
 attrs.setProperty(XMLReporterConfig.ATTR_URL, suiteResultName);
 xmlBuffer.addEmptyElement(XMLReporterConfig.TAG_TEST, attrs);
 return new File(parentDir + File.separatorChar + suiteResultName);
}