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本篇文章為大家展示了java讀寫ini配置文件的示例代碼怎么編寫，內容簡明扼要并且容易理解，絕對能使你眼前一亮，通過這篇文章的詳細介紹希望你能有所收獲。
下面通過代碼先看下java 讀寫 ini 配置文件，代碼如下所示：
package org.fh.util;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.net.URLDecoder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 說明：ini文件讀寫操作工具類
* 作者：FH Admin
* from：fhadmin.cn
*/
public class IniFileUtil {
/**
* 從ini配置文件中讀取變量的值
* @param file 配置文件的路徑
* @param section 要獲取的變量所在段名稱
* @param variable 要獲取的變量名稱
* @param defaultValue 變量名稱不存在時的默認值
* @return 變量的值
* @throws IOException 拋出文件操作可能出現的io異常
*/
public static String readCfgValue(String file, String section, String variable, String defaultValue)
throws IOException {
String strLine, value = "";
BufferedReader bufferedReader = new BufferedReader(new FileReader(URLDecoder.decode(file, "UTF-8"))); //解決中文路徑亂碼
boolean isInSection = false;
try {
while ((strLine = bufferedReader.readLine()) != null) {
strLine = strLine.trim();
strLine = strLine.split("[;]")[0];
Pattern p;
Matcher m;
p = Pattern.compile("\\[\\w+]");// Pattern.compile("file://[//s*.*//s*//]");
m = p.matcher((strLine));
if (m.matches()) {
p = Pattern.compile("\\[" + section + "\\]");// Pattern.compile("file://[//s*" + section +
// "file://s*//]");
m = p.matcher(strLine);
if (m.matches()) {
isInSection = true;
} else {
isInSection = false;
}
}
if (isInSection == true) {
strLine = strLine.trim();
String[] strArray = strLine.split("=");
if (strArray.length == 1) {
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable)) {
value = "";
return value;
}
} else if (strArray.length == 2) {
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable)) {
value = strArray[1].trim();
return value;
}
} else if (strArray.length > 2) {
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable)) {
value = strLine.substring(strLine.indexOf("=") + 1).trim();
return value;
}
}
}
}
} finally {
bufferedReader.close();
}
return defaultValue;
}
/**
* 修改ini配置文件中變量的值
* @param file 配置文件的路徑
* @param section 要修改的變量所在段名稱
* @param variable 要修改的變量名稱
* @param value 變量的新值
* @throws IOException 拋出文件操作可能出現的io異常
*/
public static boolean writeCfgValue(String file, String section, String variable, String value) throws IOException {
String fileContent, allLine, strLine, newLine;
String getValue = null;
BufferedReader bufferedReader = new BufferedReader(new FileReader(URLDecoder.decode(file, "UTF-8"))); //解決中文路徑亂碼
boolean isInSection = false;
boolean canAdd = true;
fileContent = "";
try {
while ((allLine = bufferedReader.readLine()) != null) {
allLine = allLine.trim();
strLine = allLine.split(";")[0];
Pattern p;
Matcher m;
p = Pattern.compile("\\[\\w+]");
m = p.matcher((strLine));
if (m.matches()) {
p = Pattern.compile("\\[" + section + "\\]");
m = p.matcher(strLine);
if (m.matches()) {
isInSection = true;
} else {
isInSection = false;
}
}
if (isInSection == true) {
strLine = strLine.trim();
String[] strArray = strLine.split("=");
getValue = strArray[0].trim();
if (getValue.equalsIgnoreCase(variable)) {
newLine = getValue + "=" + value;
fileContent += newLine;
while ((allLine = bufferedReader.readLine()) != null) {
fileContent += "\r\n" + allLine;
}
bufferedReader.close();
canAdd = false;
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(file, false));
bufferedWriter.write(fileContent);
bufferedWriter.flush();
bufferedWriter.close();
return true;
}
}
fileContent += allLine + "\r\n";
}
if (canAdd) {
String str = variable + "=" + value;
fileContent += str + "\r\n";
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(file, false));
bufferedWriter.write(fileContent);
bufferedWriter.flush();
bufferedWriter.close();
}
} catch (IOException ex) {
throw ex;
} finally {
bufferedReader.close();
}
return false;
}
public static void main(String[] args) {
try {
/*;文件事例
[Client]
;客戶端版本號
version=0001
;設備號
devNum=6405*/
String value = IniFileUtil.readCfgValue("L:/a.ini", "Client", "devNum", "1");
System.out.println(value);
} catch (IOException e) {
e.printStackTrace();
}
}
}在maven項目中的pom.xml中配置：
<dependency> <groupId>org.ini4j</groupId> <artifactId>ini4j</artifactId> <version>0.5.4</version> </dependency>
env.ini文件：
[dev] url="dev-url" user="dev-user" password="dev-password" [testing] url="" user="" password=""
代碼：
import org.ini4j.Ini;
import org.ini4j.Profile;
import org.ini4j.Wini;
import java.io.File;
import java.util.Map;
import java.util.Set;
public class IniUtils {
public static void main(String[] args) {
try {
readIni();
}catch (Exception e){
System.out.println(e.getMessage());
}
}
private static void readIni() throws Exception{
Wini ini = new Wini(new File("yourPath/env.ini"));
// read
Ini.Section section = ini.get("dev");
String url = section.get("url");
String user = section.get("user");
String password = section.get("password");
System.out.println(url);
System.out.println(user);
System.out.println(password);
// or just use java.util.Map interface
Map<String, String> map = ini.get("dev");
String url1 = map.get("url");
String user1 = map.get("user");
String password1 = map.get("password");
System.out.println(url1);
System.out.println(user1);
System.out.println(password1);
// get all section names
// Set<String> sectionNames = ini.keySet();
// for(String sectionName: sectionNames) {
// Profile.Section section1 = ini.get(sectionName);
// }
// write
ini.put("sleepy", "age", 55);
ini.put("sleepy", "weight", 45.6);
ini.store();
}
}上述內容就是java讀寫ini配置文件的示例代碼怎么編寫，你們學到知識或技能了嗎？如果還想學到更多技能或者豐富自己的知識儲備，歡迎關注億速云行業資訊頻道。
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