import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;
import java.util.Properties;

public class PropertiesModifier {

    public static void main(String[] args) {
        // Properties 文件路徑
        String propertiesFilePath = "xxxx_file.properties"; 

        // 要修改的多個(gè) key 及其新值
        Map<String, String> keyValues = Map.of(
                "key1", "newValue1", 
                "key2", "newValue2"  
        );

        try {
            // 調(diào)用方法來(lái)修改 properties 文件中的多個(gè) key 的值
            modifyProperties(propertiesFilePath, keyValues);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 修改 properties 文件中指定的多個(gè) key 的值
     *
     * @param propertiesFilePath properties 文件路徑
     * @param keyValues          要修改的 key 及其新值的 Map
     * @throws IOException 如果文件讀取或?qū)懭霑r(shí)出現(xiàn)錯(cuò)誤
     */
    public static void modifyProperties(String propertiesFilePath, Map<String, String> keyValues) throws IOException {
        // 創(chuàng)建 Properties 對(duì)象，用于處理 properties 文件
        Properties properties = new Properties();

        // 讀取 properties 文件
        try (InputStream input = new FileInputStream(propertiesFilePath)) {
            properties.load(input);
        }

        // 遍歷要修改的 key 值，并更新到 Properties 對(duì)象中
        for (Map.Entry<String, String> entry : keyValues.entrySet()) {
            String key = entry.getKey();
            String newValue = entry.getValue();

            // 如果 key 存在，則替換其值
            if (properties.containsKey(key)) {
                properties.setProperty(key, newValue);
                System.out.println("Updated key: " + key + ", New Value: " + newValue);
            } else {
                System.out.println("Key not found: " + key);
            }
        }

        // 將修改后的 Properties 對(duì)象寫(xiě)回到文件中
        try (OutputStream output = new FileOutputStream(propertiesFilePath)) {
            properties.store(output, "Updated properties file");
        }

        // 輸出修改后的 properties 內(nèi)容
        System.out.println("Modified Properties Content: " + properties);
    }
}

database.url=jdbc:mysql://localhost:3306/mydb
database.username=root
database.password=secret
app.name=MyApplication

Map<String, String> keyValues = Map.of(
        "database.username", "admin",
        "app.name", "ICQQ"
);

database.url=jdbc:mysql://localhost:3306/mydb
database.username=admin
database.password=secret
app.name=ICQQ