實現了J2SE的java.util.Properties類,可以用來讀取內容類似下面這樣的配置文件：
===============================================
#這是註釋
screen_width=240
screen_height=238
myname = rocks
mybirth = u00d7u00f7u00d5u00dfu00c9u00fau00c8u00d5
===============================================
這樣使用：
Properties prop = new Properties();
InputStream is = this.getClass().getResourceAsStream("conf.prop"); prop.load(is); is.close(); String name = prop.getProperty("myname"); ...為了省空間和提高性能我把解析unicode的那部分註釋起來了,如果你需要支持中文（就像上面的mybirth那樣的）,把那些註釋起來的代碼恢復就可以了.
代碼：
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package com.joyamigo.util; import java.io.*; import java.util.Hashtable; import java.util.Enumeration; public class Properties extends java.util.Hashtable {
public Properties() {
super();
}
public String getProperty(String key) {
return (String)this.get(key);
}
public String getProperty(String key, String defaultValue) { Object ret = this.get(key); return ret == null ? defaultValue : (String)ret;
}
public Object setProperty(String key, String value) { return this.put(key, value);
}
public void list(PrintStream out) {
Enumeration e = this.keys(); while (e.hasMoreElements()) { Object key = e.nextElement(); Object value = this.get(key); out.println(key "=" value);
}
}
public void load(InputStream is) throws IOException {
this.load(is, "ISO8859_1");
}
public void load(InputStream is, String enc) throws IOException { Reader reader = new InputStreamReader(is, enc);
boolean reading = true;
StringBuffer buf = new StringBuffer();
while (reading) {
int c = reader.read();
switch (c) {
case -1:
reading = false;
break;
case (int)'r':
break;
case (int)'n':
Object[] pair = parseLine(buf.toString()); if (pair != null) { this.put(pair[0], pair[1]);
}
buf.setLength(0);
break;
default:
buf.append((char)c);
}
}
Object[] pair = parseLine(buf.toString()); if (pair != null) { this.put(pair[0], pair[1]);
}
}
public void store(OutputStream out, String header) throws IOException { this.store(out, "ISO8859_1", header);
}
public void store(OutputStream out, String enc, String header) throws IOException { Writer writer = new OutputStreamWriter(out, enc); if (header != null) { writer.write("#" header "n");
}
Enumeration e = this.keys(); while (e.hasMoreElements()) { Object key = e.nextElement(); String value = (String)this.get(key); //writer.write(key "=" rconvUnicode(value) "n"); writer.write(key "=" value "n");
}
}
private Object[] parseLine(String line) {
if (line == null || line.trim().length() == 0) {
return null;
}
line = line.trim(); if (line.startsWith("#") || line.startsWith("!")) { // is comment line
return null;
}
int idx = line.indexOf("=");
if (idx == -1) {
//return new String[] { convUnicode(line), "" }; return new String[] { line, "" };
} else {
//return new String[] { convUnicode(line.substring(0, idx).trim()), // convUnicode(line.substring(idx 1).trim()) }; return new String[] { line.substring(0, idx).trim(), line.substring(idx 1).trim() };
}
}
/*/
private static final String convUnicode(String s) {
int idx = 0;
int len = s.length();
StringBuffer buf = new StringBuffer();
try {
while (idx < len) {
char c = s.charAt(idx );
if (c == '\') {
c = s.charAt(idx );
if (c == 'u') {
StringBuffer tmp = new StringBuffer(4);
for (int i = 0; i < 4; i ) {
tmp.append(s.charAt(idx ));
}
buf.append((char)Integer.parseInt(tmp.toString(), 16));
} else {
buf.append("\" c);
}
} else {
buf.append(c);
}
}
} catch (StringIndexOutOfBoundsException ex) {
;
}
return buf.toString();
}
private static final String rconvUnicode(String s) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < s.length(); i ) { char c = s.charAt(i);
if ((int)c > 127) {
buf.append("\u"); String ss = Integer.toHexString((int)c); for (int j = 0; j < 4 - ss.length(); j ) { buf.append('0');
}
buf.append(ss);
} else {
buf.append(c);
}
}
return buf.toString();
}
//*/
}
[火星人 ] j2me實現類似j2se中類Properties.java已經有553次圍觀
