下面列出了java.util.Properties#elements ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
@Test
public void givenPropertiesSize_whenPropertyFileLoaded_thenCorrect() throws IOException {
String rootPath = Thread.currentThread().getContextClassLoader().getResource("").getPath();
String appPropsPath = rootPath + "app.properties";
Properties appProps = new Properties();
appProps.load(new FileInputStream(appPropsPath));
appProps.list(System.out); // list all key-value pairs
Enumeration<Object> valueEnumeration = appProps.elements();
while (valueEnumeration.hasMoreElements()) {
System.out.println(valueEnumeration.nextElement());
}
Enumeration<Object> keyEnumeration = appProps.keys();
while (keyEnumeration.hasMoreElements()) {
System.out.println(keyEnumeration.nextElement());
}
int size = appProps.size();
assertEquals(3, size);
}
/**
* This method was introduced to fix defect #26964. For Java 1.0.2
* on Win NT, the escape sequence \u0020 was not being handled
* correctly by the Java Properties class when it was the final
* character of a line. Instead the trailing blank was dropped
* and the next line was swallowed as a continuation. To work
* around the problem, we introduced our own metasymbol to represent
* a trailing blank. Hence:
*
* Performs substitution for any metasymbols in the message
* templates. So far only %B is needed. This was introduced
* to make it more convenient for .properties files to
* contain message templates with leading or trailing blanks
* (although %B may actually occur anywhere in a template).
* Subsequently, checking for '\n' has also been added. Now,
* wherever '\n' occurs in a message template, it is replaced
* with the value of System.getProperty ("line.separator").
*/
private static final void fixMessages (Properties p) {
Enumeration keys = p.keys ();
Enumeration elems = p.elements ();
while (keys.hasMoreElements ()) {
String key = (String) keys.nextElement ();
String elem = (String) elems.nextElement ();
int i = elem.indexOf (LTB);
boolean changed = false;
while (i != -1) {
if (i == 0)
elem = " " + elem.substring (2);
else
elem = elem.substring (0, i) + " " + elem.substring (i+2);
changed = true;
i = elem.indexOf (LTB);
}
int lsIncr = lineSeparator.length () - 1;
for (i=0; i<elem.length (); i++) {
if (elem.charAt (i) == NL) {
elem = elem.substring (0, i) +
lineSeparator + elem.substring (i+1);
i += lsIncr;
changed = true;
}
}
if (changed)
p.put (key, elem);
}
}
/**
* This method was introduced to fix defect #26964. For Java 1.0.2
* on Win NT, the escape sequence \u0020 was not being handled
* correctly by the Java Properties class when it was the final
* character of a line. Instead the trailing blank was dropped
* and the next line was swallowed as a continuation. To work
* around the problem, we introduced our own metasymbol to represent
* a trailing blank. Hence:
*
* Performs substitution for any metasymbols in the message
* templates. So far only %B is needed. This was introduced
* to make it more convenient for .properties files to
* contain message templates with leading or trailing blanks
* (although %B may actually occur anywhere in a template).
* Subsequently, checking for '\n' has also been added. Now,
* wherever '\n' occurs in a message template, it is replaced
* with the value of System.getProperty ("line.separator").
*/
private static final void fixMessages (Properties p) {
Enumeration keys = p.keys ();
Enumeration elems = p.elements ();
while (keys.hasMoreElements ()) {
String key = (String) keys.nextElement ();
String elem = (String) elems.nextElement ();
int i = elem.indexOf (LTB);
boolean changed = false;
while (i != -1) {
if (i == 0)
elem = " " + elem.substring (2);
else
elem = elem.substring (0, i) + " " + elem.substring (i+2);
changed = true;
i = elem.indexOf (LTB);
}
int lsIncr = lineSeparator.length () - 1;
for (i=0; i<elem.length (); i++) {
if (elem.charAt (i) == NL) {
elem = elem.substring (0, i) +
lineSeparator + elem.substring (i+1);
i += lsIncr;
changed = true;
}
}
if (changed)
p.put (key, elem);
}
}
/**
* This method was introduced to fix defect #26964. For Java 1.0.2
* on Win NT, the escape sequence \u0020 was not being handled
* correctly by the Java Properties class when it was the final
* character of a line. Instead the trailing blank was dropped
* and the next line was swallowed as a continuation. To work
* around the problem, we introduced our own metasymbol to represent
* a trailing blank. Hence:
*
* Performs substitution for any metasymbols in the message
* templates. So far only %B is needed. This was introduced
* to make it more convenient for .properties files to
* contain message templates with leading or trailing blanks
* (although %B may actually occur anywhere in a template).
* Subsequently, checking for '\n' has also been added. Now,
* wherever '\n' occurs in a message template, it is replaced
* with the value of System.getProperty ("line.separator").
*/
private static final void fixMessages (Properties p) {
Enumeration keys = p.keys ();
Enumeration elems = p.elements ();
while (keys.hasMoreElements ()) {
String key = (String) keys.nextElement ();
String elem = (String) elems.nextElement ();
int i = elem.indexOf (LTB);
boolean changed = false;
while (i != -1) {
if (i == 0)
elem = " " + elem.substring (2);
else
elem = elem.substring (0, i) + " " + elem.substring (i+2);
changed = true;
i = elem.indexOf (LTB);
}
int lsIncr = lineSeparator.length () - 1;
for (i=0; i<elem.length (); i++) {
if (elem.charAt (i) == NL) {
elem = elem.substring (0, i) +
lineSeparator + elem.substring (i+1);
i += lsIncr;
changed = true;
}
}
if (changed)
p.put (key, elem);
}
}
/**
* This method was introduced to fix defect #26964. For Java 1.0.2
* on Win NT, the escape sequence \u0020 was not being handled
* correctly by the Java Properties class when it was the final
* character of a line. Instead the trailing blank was dropped
* and the next line was swallowed as a continuation. To work
* around the problem, we introduced our own metasymbol to represent
* a trailing blank. Hence:
*
* Performs substitution for any metasymbols in the message
* templates. So far only %B is needed. This was introduced
* to make it more convenient for .properties files to
* contain message templates with leading or trailing blanks
* (although %B may actually occur anywhere in a template).
* Subsequently, checking for '\n' has also been added. Now,
* wherever '\n' occurs in a message template, it is replaced
* with the value of System.getProperty ("line.separator").
*/
private static final void fixMessages (Properties p) {
Enumeration keys = p.keys ();
Enumeration elems = p.elements ();
while (keys.hasMoreElements ()) {
String key = (String) keys.nextElement ();
String elem = (String) elems.nextElement ();
int i = elem.indexOf (LTB);
boolean changed = false;
while (i != -1) {
if (i == 0)
elem = " " + elem.substring (2);
else
elem = elem.substring (0, i) + " " + elem.substring (i+2);
changed = true;
i = elem.indexOf (LTB);
}
int lsIncr = lineSeparator.length () - 1;
for (i=0; i<elem.length (); i++) {
if (elem.charAt (i) == NL) {
elem = elem.substring (0, i) +
lineSeparator + elem.substring (i+1);
i += lsIncr;
changed = true;
}
}
if (changed)
p.put (key, elem);
}
}
/**
* This method was introduced to fix defect #26964. For Java 1.0.2
* on Win NT, the escape sequence \u0020 was not being handled
* correctly by the Java Properties class when it was the final
* character of a line. Instead the trailing blank was dropped
* and the next line was swallowed as a continuation. To work
* around the problem, we introduced our own metasymbol to represent
* a trailing blank. Hence:
*
* Performs substitution for any metasymbols in the message
* templates. So far only %B is needed. This was introduced
* to make it more convenient for .properties files to
* contain message templates with leading or trailing blanks
* (although %B may actually occur anywhere in a template).
* Subsequently, checking for '\n' has also been added. Now,
* wherever '\n' occurs in a message template, it is replaced
* with the value of System.getProperty ("line.separator").
*/
private static final void fixMessages (Properties p) {
Enumeration keys = p.keys ();
Enumeration elems = p.elements ();
while (keys.hasMoreElements ()) {
String key = (String) keys.nextElement ();
String elem = (String) elems.nextElement ();
int i = elem.indexOf (LTB);
boolean changed = false;
while (i != -1) {
if (i == 0)
elem = " " + elem.substring (2);
else
elem = elem.substring (0, i) + " " + elem.substring (i+2);
changed = true;
i = elem.indexOf (LTB);
}
int lsIncr = lineSeparator.length () - 1;
for (i=0; i<elem.length (); i++) {
if (elem.charAt (i) == NL) {
elem = elem.substring (0, i) +
lineSeparator + elem.substring (i+1);
i += lsIncr;
changed = true;
}
}
if (changed)
p.put (key, elem);
}
}
/**
* This method was introduced to fix defect #26964. For Java 1.0.2
* on Win NT, the escape sequence \u0020 was not being handled
* correctly by the Java Properties class when it was the final
* character of a line. Instead the trailing blank was dropped
* and the next line was swallowed as a continuation. To work
* around the problem, we introduced our own metasymbol to represent
* a trailing blank. Hence:
*
* Performs substitution for any metasymbols in the message
* templates. So far only %B is needed. This was introduced
* to make it more convenient for .properties files to
* contain message templates with leading or trailing blanks
* (although %B may actually occur anywhere in a template).
* Subsequently, checking for '\n' has also been added. Now,
* wherever '\n' occurs in a message template, it is replaced
* with the value of System.getProperty ("line.separator").
*/
private static final void fixMessages (Properties p) {
Enumeration keys = p.keys ();
Enumeration elems = p.elements ();
while (keys.hasMoreElements ()) {
String key = (String) keys.nextElement ();
String elem = (String) elems.nextElement ();
int i = elem.indexOf (LTB);
boolean changed = false;
while (i != -1) {
if (i == 0)
elem = " " + elem.substring (2);
else
elem = elem.substring (0, i) + " " + elem.substring (i+2);
changed = true;
i = elem.indexOf (LTB);
}
int lsIncr = lineSeparator.length () - 1;
for (i=0; i<elem.length (); i++) {
if (elem.charAt (i) == NL) {
elem = elem.substring (0, i) +
lineSeparator + elem.substring (i+1);
i += lsIncr;
changed = true;
}
}
if (changed)
p.put (key, elem);
}
}
/**
* This method was introduced to fix defect #26964. For Java 1.0.2
* on Win NT, the escape sequence \u0020 was not being handled
* correctly by the Java Properties class when it was the final
* character of a line. Instead the trailing blank was dropped
* and the next line was swallowed as a continuation. To work
* around the problem, we introduced our own metasymbol to represent
* a trailing blank. Hence:
*
* Performs substitution for any metasymbols in the message
* templates. So far only %B is needed. This was introduced
* to make it more convenient for .properties files to
* contain message templates with leading or trailing blanks
* (although %B may actually occur anywhere in a template).
* Subsequently, checking for '\n' has also been added. Now,
* wherever '\n' occurs in a message template, it is replaced
* with the value of System.getProperty ("line.separator").
*/
private static final void fixMessages (Properties p) {
Enumeration keys = p.keys ();
Enumeration elems = p.elements ();
while (keys.hasMoreElements ()) {
String key = (String) keys.nextElement ();
String elem = (String) elems.nextElement ();
int i = elem.indexOf (LTB);
boolean changed = false;
while (i != -1) {
if (i == 0)
elem = " " + elem.substring (2);
else
elem = elem.substring (0, i) + " " + elem.substring (i+2);
changed = true;
i = elem.indexOf (LTB);
}
int lsIncr = lineSeparator.length () - 1;
for (i=0; i<elem.length (); i++) {
if (elem.charAt (i) == NL) {
elem = elem.substring (0, i) +
lineSeparator + elem.substring (i+1);
i += lsIncr;
changed = true;
}
}
if (changed)
p.put (key, elem);
}
}
/**
* This method was introduced to fix defect #26964. For Java 1.0.2
* on Win NT, the escape sequence \u0020 was not being handled
* correctly by the Java Properties class when it was the final
* character of a line. Instead the trailing blank was dropped
* and the next line was swallowed as a continuation. To work
* around the problem, we introduced our own metasymbol to represent
* a trailing blank. Hence:
*
* Performs substitution for any metasymbols in the message
* templates. So far only %B is needed. This was introduced
* to make it more convenient for .properties files to
* contain message templates with leading or trailing blanks
* (although %B may actually occur anywhere in a template).
* Subsequently, checking for '\n' has also been added. Now,
* wherever '\n' occurs in a message template, it is replaced
* with the value of System.getProperty ("line.separator").
*/
private static final void fixMessages (Properties p) {
Enumeration keys = p.keys ();
Enumeration elems = p.elements ();
while (keys.hasMoreElements ()) {
String key = (String) keys.nextElement ();
String elem = (String) elems.nextElement ();
int i = elem.indexOf (LTB);
boolean changed = false;
while (i != -1) {
if (i == 0)
elem = " " + elem.substring (2);
else
elem = elem.substring (0, i) + " " + elem.substring (i+2);
changed = true;
i = elem.indexOf (LTB);
}
int lsIncr = lineSeparator.length () - 1;
for (i=0; i<elem.length (); i++) {
if (elem.charAt (i) == NL) {
elem = elem.substring (0, i) +
lineSeparator + elem.substring (i+1);
i += lsIncr;
changed = true;
}
}
if (changed)
p.put (key, elem);
}
}