Java ini文件读写修改配置内容以及使用org.dtools.javaini-v1.1.00.jar中文乱码

目前为止，我了解到只有两种INI文件读取的jar包，分别为ini4j-0.5.4.jar和org.dtools.javaini-v1.1.00.jar

我只简单描述一下org.dtools.javaini-v1.1.00.jar的使用以及中文乱码问题。

简单使用如下：

public class TestDemo {

public static void main(String[] args) {
       // TODO Auto-generated method stub

try {
   String fileName = "D:\\test.ini";
       File file = new File(fileName);
       IniFile iniFile = new BasicIniFile();
       //读取INI文件
       IniFileReader rad = new IniFileReader(iniFile, file);
           rad.read();
           //写入INI文件
           IniFileWriter wir = new IniFileWriter(iniFile, file);
           IniSection iniSection = iniFile.getSection("user");
   IniItem iniItemUserName = iniSection.getItem("user_name");
   IniItem iniItemUserId = iniSection.getItem("user_id");
   IniItem iniItemUserAge = iniSection.getItem("user_age");
   IniItem iniItemDepartment = iniSection.getItem("department");
   System.out.println("name:"+iniItemUserName.getValue());
   System.out.println("name:"+iniItemUserId.getValue());
   System.out.println("name:"+iniItemUserAge.getValue());
   System.out.println("name:"+iniItemDepartment.getValue());
   iniItemUserName.setValue("李四");
   iniItemUserId.setValue("0002");
   iniItemUserAge.setValue(23);
   iniItemDepartment.setValue("销售部");
   wir.write();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }

}

INI文件内容是：

[user]
user_name=张三
user_id=0001
user_age=22
department=技术部

运行代码之后INI文件变成：

[user]
user_name=李四
user_id=0002
user_age=23
department=销售部

我们可以通过网上下载org.dtools.javaini-v1.1.00.jar导入项目，使用的时候会出现中文乱码，这是什么情况呢？

通过查看org.dtools.javaini-v1.1.00.jar的源码，原来他们使用是了ASCII编码。主要通过查看这两个类IniFileReader类和IniFileWriter类。

读取INI文件查看IniFileReade类，主要看的部分代码

public void read() throws IOException {
IniSection currentSection = null;
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(this.file), "ASCII"));

省掉部分代码

reader.close();
}

从这段BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(this.file), "ASCII"));代码就可以知道读取INI文件的格式是ASCII。所以我们需要改成utf-8或者GBK才不会出现中文乱码。

写入INI文件看IniFileWriter主要看代码部分

public void write() throws IOException {
BufferedWriter bufferWriter = null;
FileOutputStream fos = new FileOutputStream(this.file);
OutputStreamWriter osw = new OutputStreamWriter(fos, "ASCII");
bufferWriter = new BufferedWriter(osw);
bufferWriter.write(this.iniToString(this.ini));
bufferWriter.close();
}

这句代码 OutputStreamWriter osw = new OutputStreamWriter(fos, "ASCII");就可以知道写入INI文件的格式是ASCII，所以也会出现中文乱码。其实IniFileWriter类还有这句代码public static final String ENCODING = "ASCII";也是使用到ASCII，只是它不影响读写。

修改方式：

第一种方式下载源码进修改。源码只需要改这个public static final String ENCODING = "ASCII"代码就可以了，其它两个地方都是调用它。

第二种方式：分别生成一个类把里面的代码复制出来修改就行了。主要原因是因为里面的一些方法使用了private，所以只能复制了。如

public class MyIniFileReader extends IniFileReader {

private File file;
private IniFile ini;

static String getEndLineComment(String line) {
if (!isSection(line) && !isItem(line)) {
throw new FormatException("getEndLineComment(String) is unable to return the comment from the given string (\"" + line + "\" as it is not an item nor a section.");
} else {
int pos = line.indexOf(59);
return pos == -1 ? "" : line.substring(pos + 1).trim();
}
}

static String getItemName(String line) {
if (!isItem(line)) {
throw new FormatException("getItemName(String) is unable to return the name of the item as the given string (\"" + line + "\" is not an item.");
} else {
int pos = line.indexOf(61);
return pos == -1 ? "" : line.substring(0, pos).trim();
}
}

static String getItemValue(String line) {
if (!isItem(line)) {
throw new FormatException("getItemValue(String) is unable to return the value of the item as the given string (\"" + line + "\" is not an item.");
} else {
int posEquals = line.indexOf(61);
int posComment = line.indexOf(59);
if (posEquals == -1) {
return posComment == -1 ? line : line.substring(0, posComment).trim();
} else {
return posComment == -1 ? line.substring(posEquals + 1).trim() : line.substring(posEquals + 1, posComment).trim();
}
}
}

static String getSectionName(String line) {
if (!isSection(line)) {
throw new FormatException("getSectionName(String) is unable to return the name of the section as the given string (\"" + line + "\" is not a section.");
} else {
int firstPos = line.indexOf(91);
int lastPos = line.indexOf(93);
return line.substring(firstPos + 1, lastPos).trim();
}
}

static boolean isComment(String line) {
line = line.trim();
if (line.isEmpty()) {
return false;
} else {
char firstChar = line.charAt(0);
return firstChar == ';';
}
}

static boolean isItem(String line) {
line = removeComments(line);
if (line.isEmpty()) {
return false;
} else {
int pos = line.indexOf(61);
if (pos != -1) {
String name = line.substring(0, pos).trim();
return name.length() > 0;
} else {
return false;
}
}
}

static boolean isSection(String line) {
line = removeComments(line);
if (line.isEmpty()) {
return false;
} else {
char firstChar = line.charAt(0);
char lastChar = line.charAt(line.length() - 1);
return firstChar == '[' && lastChar == ']';
}
}

static String removeComments(String line) {
return line.contains(String.valueOf(';')) ? line.substring(0, line.indexOf(59)).trim() : line.trim();
}

public MyIniFileReader(IniFile ini, File file) {
super(ini, file);
if (ini == null) {
throw new NullPointerException("The given IniFile cannot be null.");
} else if (file == null) {
throw new NullPointerException("The given File cannot be null.");
} else {
this.file = file;
this.ini = ini;
}
}

public void read() throws IOException {
IniSection currentSection = null;
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(this.file), "GB2312"));
String comment = "";
Object lastCommentable = null;

String line;
while((line = reader.readLine()) != null) {
line = line.trim();
if (line.isEmpty()) {
if (!comment.isEmpty() && lastCommentable != null) {
((Commentable)lastCommentable).setPostComment(comment);
comment = "";
}
} else {
String itemName;
if (isComment(line)) {
itemName = line.substring(1).trim();
if (comment.isEmpty()) {
comment = itemName;
} else {
comment = comment + "\n" + itemName;
}
} else {
String itemValue;
if (isSection(line)) {
itemName = getSectionName(line);
itemValue = getEndLineComment(line);
if (this.ini.hasSection(itemName)) {
currentSection = this.ini.getSection(itemName);
} else {
currentSection = this.ini.addSection(itemName);
}

currentSection.setEndLineComment(itemValue);
if (!comment.isEmpty()) {
currentSection.setPreComment(comment);
comment = "";
}

lastCommentable = currentSection;
} else if (isItem(line)) {
if (currentSection == null) {
throw new FormatException("An Item has been read,before any section.");
}

itemName = getItemName(line);
itemValue = getItemValue(line);
String endLineComment = getEndLineComment(line);
IniItem item;
if (currentSection.hasItem(itemName)) {
item = currentSection.getItem(itemName);
} else {
try {
item = currentSection.addItem(itemName);
} catch (InvalidNameException var11) {
throw new FormatException("The string \"" + itemName + "\" is an invalid name for an " + "IniItem.");
}
}

item.setValue(itemValue);
item.setEndLineComment(endLineComment);
if (!comment.isEmpty()) {
item.setPreComment(comment);
comment = "";
}

lastCommentable = item;
}
}
}
}

if (!comment.isEmpty() && lastCommentable != null) {
((Commentable)lastCommentable).setPostComment(comment);
comment = "";
}

reader.close();
}
}

public class MyIniFileWriter extends IniFileWriter {

private IniFile ini;
private File file;
private boolean sectionLineSeparator;
private boolean includeSpaces;
private boolean itemLineSeparator;
public MyIniFileWriter(IniFile ini, File file) {
super(ini, file);
if (ini == null) {
throw new IllegalArgumentException("Cannot write a null IniFile");
} else if (file == null) {
throw new IllegalArgumentException("Cannot write an IniFile to a null file");
} else {
this.ini = ini;
this.file = file;
this.setIncludeSpaces(false);
this.setItemLineSeparator(false);
this.setSectionLineSeparator(false);
}
}

@Override
public void write() throws IOException {
super.write();
BufferedWriter bufferWriter = null;
FileOutputStream fos = new FileOutputStream(this.file);
OutputStreamWriter osw = new OutputStreamWriter(fos, "GB2312");
bufferWriter = new BufferedWriter(osw);
bufferWriter.write(this.iniToString(this.ini));
bufferWriter.close();
}

private String iniToString(IniFile ini) {
StringBuilder builder = new StringBuilder();
int size = ini.getNumberOfSections();

for(int i = 0; i < size; ++i) {
IniSection section = ini.getSection(i);
builder.append(this.sectionToString(section));
builder.append("\r\n");
}

return builder.toString();
}

private String sectionToString(IniSection section) {
StringBuilder builder = new StringBuilder();
if (this.sectionLineSeparator) {
builder.append("\r\n");
}

String comment = section.getPreComment();
if (!comment.equals("")) {
builder.append(this.formatComment(comment, false));
}

builder.append("[" + section.getName() + "]");
comment = section.getEndLineComment();
if (!comment.equals("")) {
builder.append(" ;" + comment);
}

comment = section.getPostComment();
if (!comment.equals("")) {
builder.append(this.formatComment(comment, true));
builder.append("\r\n");
} else if (this.sectionLineSeparator) {
builder.append("\r\n");
}

int size = section.getNumberOfItems();

for(int i = 0; i < size; ++i) {
IniItem item = section.getItem(i);
builder.append("\r\n");
builder.append(this.itemToString(item));
}

return builder.toString();
}

private String formatComment(String comment, boolean prefixNewLine) {
StringBuilder sb = new StringBuilder();
if (comment.contains("\n")) {
String[] comments = comment.split("\n");
String[] var8 = comments;
int var7 = comments.length;

for(int var6 = 0; var6 < var7; ++var6) {
String aComment = var8[var6];
if (prefixNewLine) {
sb.append("\r\n");
}

sb.append(';' + aComment);
if (!prefixNewLine) {
sb.append("\r\n");
}
}
} else {
if (prefixNewLine) {
sb.append("\r\n");
}

sb.append(';' + comment);
if (!prefixNewLine) {
sb.append("\r\n");
}
}

return sb.toString();
}

private String itemToString(IniItem item) {
StringBuilder builder = new StringBuilder();
String comment = item.getPreComment();
if (!comment.equals("")) {
builder.append(this.formatComment(comment, false));
}

if (this.includeSpaces) {
builder.append(item.getName() + " = ");
} else {
builder.append(item.getName() + "=");
}

if (item.getValue() != null) {
builder.append(item.getValue());
}

if (!item.getEndLineComment().equals("")) {
builder.append(" ;" + item.getEndLineComment());
}

comment = item.getPostComment();
if (!comment.equals("")) {
builder.append(this.formatComment(comment, true));
builder.append("\r\n");
} else if (this.itemLineSeparator) {
builder.append("\r\n");
}

return builder.toString();
}

}

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