java读写ini配置文件代码示例

本篇文章小编给大家分享一下java读写ini配置文件代码示例，文章代码介绍的很详细，小编觉得挺不错的，现在分享给大家供大家参考，有需要的小伙伴们可以来看看。

代码如下所示：

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;
/**
 * 说明：ini文件读写操作工具类
 * 作者：FH Admin
 * from：fhadmin.cn
 */
public class IniFileUtil {
    /**
     * 从ini配置文件中读取变量的值
     * @param file         配置文件的路径
     * @param section      要获取的变量所在段名称
     * @param variable     要获取的变量名称
     * @param defaultValue 变量名称不存在时的默认值
     * @return 变量的值
     * @throws IOException 抛出文件操作可能出现的io异常
     */
    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"))); //解决中文路径乱码
        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配置文件中变量的值
     * @param file     配置文件的路径
     * @param section  要修改的变量所在段名称
     * @param variable 要修改的变量名称
     * @param value    变量的新值
     * @throws IOException 抛出文件操作可能出现的io异常
     */
    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"))); //解决中文路径乱码
        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 += "rn" + allLine;
                        }
                        bufferedReader.close();
                        canAdd = false;
                        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(file, false));
                        bufferedWriter.write(fileContent);
                        bufferedWriter.flush();
                        bufferedWriter.close();
                        return true;
                    }
                }
                fileContent += allLine + "rn";
            }
            if (canAdd) {
                String str = variable + "=" + value;
                fileContent += str + "rn";
                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]
            ;客户端版本号
            version=0001
            ;设备号
            devNum=6405*/
            String value = IniFileUtil.readCfgValue("L:/a.ini", "Client", "devNum", "1");
            System.out.println(value);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
}

补充：下面看下java 读取ini配置文件

在maven项目中的pom.xml中配置：

    org.ini4j
    ini4j
    0.5.4

env.ini文件：

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

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

代码：

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 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 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();
    }
}