方法一: 编辑玩了后在dos在用jdk自带的native2ascii命令把资源文件转换一下就可以了

命令为native2ascii 资源文件名 新的资源文件名
执行完后便会在新的资源文件中看见中文全变成/u...什么了样子~~这样就可以了

把旧的删掉 新的资源文件改回旧的资源文件名

方法二:使用插件PropertiesEdit,下载地址:
http://propedit.sourceforge.jp/eclipse/updates/

方法三: 修改properties的源代码.主要是修改saveConvert()方法和loadConvert()方法，大家可以自己建立一个类，然后把properties类的代码拷贝过来，然后修改这两个方法就可以了。
或者直接将我下面的代码拷贝过去就可以了。

package xiaotang.util;
import java.util.*;
package xiaotang.util;

import java.io.IOException;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.BufferedWriter;
import java.util.Hashtable;
import java.util.*;
/**
*
* <p>Title: </p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2005</p>
*
* <p>Company: 哈尔滨商业大学</p>
*
* @author Onlyfor_love
* @version 1.0
*/

public class PropertiesExt extends Hashtable {

private static final long serialVersionUID = 4112578634029874840L;
protected PropertiesExt defaults;
public PropertiesExt() {
this(null);
}
public PropertiesExt(PropertiesExt defaults) {
this.defaults = defaults;
}
public synchronized Object setProperty(String key, String value) {
return put(key, value);
}

private static final String keyValueSeparators = "=: \t\r\n\f";

private static final String strictKeyValueSeparators = "=:";

private static final String specialSaveChars = "=: \t\r\n\f#!";

private static final String whiteSpaceChars = " \t\r\n\f";

public synchronized void load(InputStream inStream) throws IOException {
//把所有的8859-1全部换成GBK
BufferedReader in = new BufferedReader(new InputStreamReader(inStream, "GBK"));
while (true) {
// Get next line
String line = in.readLine();
if (line == null)
return;

if (line.length() > 0) {

// Find start of key
int len = line.length();
int keyStart;
for (keyStart=0; keyStart<len; keyStart++)
if (whiteSpaceChars.indexOf(line.charAt(keyStart)) == -1)
break;

// Blank lines are ignored
if (keyStart == len)
continue;

// Continue lines that end in slashes if they are not comments
char firstChar = line.charAt(keyStart);
if ((firstChar != '#') && (firstChar != '!')) {
while (continueLine(line)) {
String nextLine = in.readLine();
if (nextLine == null)
nextLine = "";
String loppedLine = line.substring(0, len-1);
// Advance beyond whitespace on new line
int startIndex;
for (startIndex=0; startIndex<nextLine.length(); startIndex++)
if (whiteSpaceChars.indexOf(nextLine.charAt(startIndex)) == -1)
break;
nextLine = nextLine.substring(startIndex,nextLine.length());
line = new String(loppedLine+nextLine);
len = line.length();
}

// Find separation between key and value
int separatorIndex;
for (separatorIndex=keyStart; separatorIndex<len; separatorIndex++) {
char currentChar = line.charAt(separatorIndex);
if (currentChar == '\\')
separatorIndex++;
else if (keyValueSeparators.indexOf(currentChar) != -1)
break;
}

// Skip over whitespace after key if any
int valueIndex;
for (valueIndex=separatorIndex; valueIndex<len; valueIndex++)
if (whiteSpaceChars.indexOf(line.charAt(valueIndex)) == -1)
break;

// Skip over one non whitespace key value separators if any
if (valueIndex < len)
if (strictKeyValueSeparators.indexOf(line.charAt(valueIndex)) != -1)
valueIndex++;

// Skip over white space after other separators if any
while (valueIndex < len) {
if (whiteSpaceChars.indexOf(line.charAt(valueIndex)) == -1)
break;
valueIndex++;
}
String key = line.substring(keyStart, separatorIndex);
String value = (separatorIndex < len) ? line.substring(valueIndex, len) : "";

// Convert then store key and value
key = loadConvert(key);
value = loadConvert(value);
put(key, value);
}
}
}
}

/*
* Returns true if the given line is a line that must
* be appended to the next line
*/
private boolean continueLine(String line) {
int slashCount = 0;
int index = line.length() - 1;
while ((index >= 0) && (line.charAt(index--) == '\\'))
slashCount++;
return (slashCount % 2 == 1);
}

/**
*
* <p>Title: </p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2005</p>
*
* <p>Company: 哈尔滨商业大学</p>
*
* @author Onlyfor_love
* @version 1.0
*/
private String loadConvert(String theString) {
//该功能主要是将存储的key和value提取出来，因为存储的中文在原来的properties类中被转换成了别的编码
//存储的中文在*.properties文件中以乱码出现
char aChar;
int len = theString.length();
StringBuffer outBuffer = new StringBuffer(len);
//
// for (int x=0; x<len; ) {
// aChar = theString.charAt(x++);
// if (aChar == '\\') {
// aChar = theString.charAt(x++);
// if (aChar == 'u') {
// // Read the xxxx
// int value=0;
// for (int i=0; i<4; i++) {
// aChar = theString.charAt(x++);
// switch (aChar) {
// case '0': case '1': case '2': case '3': case '4':
// case '5': case '6': case '7': case '8': case '9':
// value = (value << 4) + aChar - '0';
// break;
// case 'a': case 'b': case 'c':
// case 'd': case 'e': case 'f':
// value = (value << 4) + 10 + aChar - 'a';
// break;
// case 'A': case 'B': case 'C':
// case 'D': case 'E': case 'F':
// value = (value << 4) + 10 + aChar - 'A';
// break;
// default:
// throw new IllegalArgumentException(
// "Malformed \\uxxxx encoding.");
// }
// }
// outBuffer.append((char)value);
// } else {
// if (aChar == 't') aChar = '\t';
// else if (aChar == 'r') aChar = '\r';
// else if (aChar == 'n') aChar = '\n';
// else if (aChar == 'f') aChar = '\f';
// outBuffer.append(aChar);
// }
// } else
outBuffer.append(theString);
// }
return outBuffer.toString();
}

/**
*
* <p>Title: </p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2005</p>
*
* <p>Company: 哈尔滨商业大学</p>
*
* @author Onlyfor_love
* @version 1.0
*/

private String saveConvert(String theString, boolean escapeSpace) {
//该功能主要是将存储key和value，因为中文的存储在原来的properties类中被转换成了别的编码
//存储的中文在*.properties文件中以乱码出现
int len = theString.length();
StringBuffer outBuffer = new StringBuffer(len*2);
outBuffer.append(theString);

// for(int x=0; x<len; x++) {
// char aChar = theString.charAt(x);
// switch(aChar) {
// case ' ':
// if (x == 0 || escapeSpace)
// outBuffer.append('\\');
//
// outBuffer.append(' ');
// break;
// case '\\':outBuffer.append('\\'); outBuffer.append('\\');
// break;
// case '\t':outBuffer.append('\\'); outBuffer.append('t');
// break;
// case '\n':outBuffer.append('\\'); outBuffer.append('n');
// break;
// case '\r':outBuffer.append('\\'); outBuffer.append('r');
// break;
// case '\f':outBuffer.append('\\'); outBuffer.append('f');
// break;
// default:
//
// if ((aChar < 0x0020) || (aChar > 0x007e)) {
// outBuffer.append('\\');
// outBuffer.append('u');
// outBuffer.append(toHex((aChar >> 12) & 0xF));
// outBuffer.append(toHex((aChar >> 8) & 0xF));
// outBuffer.append(toHex((aChar >> 4) & 0xF));
// outBuffer.append(toHex( aChar & 0xF));
// } else {
// if (specialSaveChars.indexOf(aChar) != -1)
// outBuffer.append('\\');
// outBuffer.append(aChar);
// }
// }
// }
return outBuffer.toString();
}

/**
* Calls the <code>store(OutputStream out, String header)</code> method
* and suppresses IOExceptions that were thrown.
*
* @deprecated This method does not throw an IOException if an I/O error
* occurs while saving the property list. As of the Java 2 platform v1.2, the preferred
* way to save a properties list is via the <code>store(OutputStream out,
* String header)</code> method.
*
* @param out an output stream.
* @param header a description of the property list.
* @exception ClassCastException if this <code>Properties</code> object
* contains any keys or values that are not <code>Strings</code>.
*/
public synchronized void save(OutputStream out, String header) {
try {
store(out, header);
} catch (IOException e) {
}
}

public synchronized void store(OutputStream out, String header)
throws IOException
{
BufferedWriter awriter;
awriter = new BufferedWriter(new OutputStreamWriter(out, "GBK"));
if (header != null)
writeln(awriter, "#" + header);
writeln(awriter, "#" + new Date().toString());
for (Enumeration e = keys(); e.hasMoreElements();) {
String key = (String)e.nextElement();
String val = (String)get(key);
key = saveConvert(key, false);

/* No need to escape embedded and trailing spaces for value, hence
* pass false to flag.
*/
val = saveConvert(val, false);
writeln(awriter, key + "=" + val);
}
awriter.flush();
}

private static void writeln(BufferedWriter bw, String s) throws IOException {
bw.write(s);
bw.newLine();
}

public String getProperty(String key) {
Object oval = super.get(key);
String sval = (oval instanceof String) ? (String)oval : null;
return ((sval == null) && (defaults != null)) ? defaults.getProperty(key) : sval;
}

public String getProperty(String key, String defaultValue) {
String val = getProperty(key);
return (val == null) ? defaultValue : val;
}

public Enumeration propertyNames() {
Hashtable h = new Hashtable();
enumerate(h);
return h.keys();
}

public void list(PrintStream out) {
out.println("-- listing properties --");
Hashtable h = new Hashtable();
enumerate(h);
for (Enumeration e = h.keys() ; e.hasMoreElements() ;) {
String key = (String)e.nextElement();
String val = (String)h.get(key);
if (val.length() > 40) {
val = val.substring(0, 37) + "...";
}
out.println(key + "=" + val);
}
}

public void list(PrintWriter out) {
out.println("-- listing properties --");
Hashtable h = new Hashtable();
enumerate(h);
for (Enumeration e = h.keys() ; e.hasMoreElements() ;) {
String key = (String)e.nextElement();
String val = (String)h.get(key);
if (val.length() > 40) {
val = val.substring(0, 37) + "...";
}
out.println(key + "=" + val);
}
}

private synchronized void enumerate(Hashtable h) {
if (defaults != null) {
defaults.enumerate(h);
}
for (Enumeration e = keys() ; e.hasMoreElements() ;) {
String key = (String)e.nextElement();
h.put(key, get(key));
}
}

private static char toHex(int nibble) {
return hexDigit[(nibble & 0xF)];
}

/** A table of hex digits */
private static final char[] hexDigit = {
'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'
};
}


/////////////////////////////////////////////////////////////////
然后写一个常用的配置文件操作类：
package xiaotang.util;
import java.io.*;

public class writeToProperty {
private String fileName;
private PropertiesExt prop = new PropertiesExt();
private InputStream fileStream = null;
private OutputStream outStream = null;
/**
*构造函数
* @param fileName 文件名字，包含路径
*/
public writeToProperty(String fileName) {
this.fileName = fileName;
}

//读取文件，不存在则创建文件
private void readFile() {
try {
File f = new File(fileName);
fileStream = new FileInputStream(f);
prop.load(fileStream);
}
catch (Exception e) {
e.printStackTrace();
}
finally {
try {
if (fileStream != null)
fileStream.close();
}
catch (IOException ex) {
ex.printStackTrace();
}
}

}

private void writeFile() {
try {
File f = new File(fileName);
outStream = new FileOutputStream(f);
}
catch (Exception e) {
e.printStackTrace();
}
}

/**
* 返回指定key的vlaue
* @param key
* @return
*/
public String getValue(String key) {
readFile();
if (key != null && !key.equals(""))
return prop.getProperty(key);
else
return "";
}

/**
*返回指定key的vlaue,如果key不存在则返回defaultValue值
* @param key
* @param defaultValue
* @return
*/
public String getValue(String key, String defaultValue) {
if (key != null && !key.equals(""))
return prop.getProperty(key, defaultValue);
else
return "";
}

/**
* 设置对应key的数值，如果key存在的覆盖value的数值，如果key不存则创建
* @param key
* @param value
*/
public void setValue(String key, String value) {
readFile();
writeFile();
prop.setProperty(key, value);
try {
prop.store(outStream, "GBK");
}
catch (IOException ex) {
ex.printStackTrace();
}
finally {
try {
outStream.close();
}
catch (IOException ex1) {
ex1.printStackTrace();
}
}
}
}
////////////////////////////////////////////////////////////
接着写一个测试类就可以了：
package xiaotang.util;

import xiaotang.util.PropertiesExt;
import java.io.*;
/**
*
* <p>Title: </p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2005</p>
*
* <p>Company: 哈尔滨商业大学</p>
*
* @author Onlyfor_love
* @version 1.0
*/
public class PropertyFile {
public static void main(String[] args) {
writeToProperty wt = new writeToProperty("d:\\config1.properties");
wt.setValue("一","我是谁？");
wt.setValue("二","我是陈晓棠");
String one = wt.getValue("一");
String two = wt.getValue("二");
System.out.println(one);
System.out.println(two);
}

}
回头你再看看你的配置文件，中文依然是中文。