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(rèn)值
     * @return 變量的值
     * @throws IOException 拋出文件操作可能出現(xiàn)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(xiàn)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(shè)備號
            devNum=6405*/
            String value = IniFileUtil.readCfgValue("L:/a.ini", "Client", "devNum", "1");
            System.out.println(value);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
}

<dependency>
? ? <groupId>org.ini4j</groupId>
? ? <artifactId>ini4j</artifactId>
? ? <version>0.5.4</version>
</dependency>

[dev]
url="dev-url"
user="dev-user"
password="dev-password"

[testing]
url=""
user=""
password=""

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();
? ? }
}