优化多配置管理：Java中如何高效使用嵌套HashMap

####Config1####
conf1.password=admin
conf1.username=admin
conf1.context=123
conf1.name=localhost

####config2####
conf2.username=app
conf2.password=app
conf2.context=com
conf2.name=localhost

# ... 其他配置组

// 假设 prop 是已加载的 Properties 对象
Properties prop = new Properties();
// ... 加载属性文件到 prop

HashMap<String, String> conf1 = new HashMap<>();
HashMap<String, String> conf2 = new HashMap<>();
// ... conf3, conf4

conf1.put("UserName", prop.getProperty("conf1.username"));
conf1.put("Password", prop.getProperty("conf1.password"));
conf1.put("Name", prop.getProperty("conf1.name"));
conf1.put("Context", prop.getProperty("conf1.context")); // 注意这里修正了原始问题中的 typo

conf2.put("UserName", prop.getProperty("conf2.username"));
conf2.put("Password", prop.getProperty("conf2.password"));
conf2.put("Name", prop.getProperty("conf2.name"));
conf2.put("Context", prop.getProperty("conf2.context"));

// ... 重复的代码用于 conf3, conf4

String currentConfigName = "conf1"; // 假设这是当前需要使用的配置名称

if (currentConfigName.equalsIgnoreCase("conf1")) {
    // 冗长的配置访问和使用
    System.out.println("Name:" + conf1.get("Name") + 
                       "-UserName:" + conf1.get("UserName") + 
                       "-Password:" + conf1.get("Password") + 
                       "-Context:" + conf1.get("Context"));
} else if (currentConfigName.equalsIgnoreCase("conf2")) {
    // 再次重复
    System.out.println("Name:" + conf2.get("Name") + 
                       "-UserName:" + conf2.get("UserName") + 
                       "-Password:" + conf2.get("Password") + 
                       "-Context:" + conf2.get("Context"));
}
// ... 更多的 if-else if 块

import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

public class ConfigManager {

    public static void main(String[] args) {
        // 假设属性文件名为 config.properties
        Properties prop = new Properties();
        try (FileInputStream fis = new FileInputStream("config.properties")) {
            prop.load(fis);
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }

        // 定义嵌套 HashMap 来存储所有配置
        HashMap<String, HashMap<String, String>> allConfigurations = new HashMap<>();

        // 假设有4个配置组：conf1, conf2, conf3, conf4
        // 可以根据实际配置数量调整循环范围
        for (int i = 1; i <= 4; i++) {
            String currentConfName = "conf" + i;
            HashMap<String, String> currentConf = new HashMap<>();

            // 从属性文件中获取当前配置组的各个属性
            currentConf.put("UserName", prop.getProperty(currentConfName + ".username"));
            currentConf.put("Password", prop.getProperty(currentConfName + ".password"));
            currentConf.put("Context", prop.getProperty(currentConfName + ".context"));
            currentConf.put("Name", prop.getProperty(currentConfName + ".name"));

            // 将当前配置组添加到总的配置集合中
            allConfigurations.put(currentConfName, currentConf);
        }

        // 示例：打印所有加载的配置
        System.out.println("所有加载的配置:");
        for (Map.Entry<String, HashMap<String, String>> entry : allConfigurations.entrySet()) {
            System.out.println("  " + entry.getKey() + ": " + entry.getValue());
        }
    }
}

// 假设 allConfigurations 已经如上所示加载完成

String targetConfigName = "conf2"; // 假设需要访问 conf2 的配置

// 获取指定配置组的 HashMap
HashMap<String, String> selectedConfig = allConfigurations.get(targetConfigName);

if (selectedConfig != null) {
    // 访问配置的各个属性
    String username = selectedConfig.get("UserName");
    String password = selectedConfig.get("Password");
    String name = selectedConfig.get("Name");
    String context = selectedConfig.get("Context");

    System.out.println("\n正在使用配置: " + targetConfigName);
    System.out.println("  用户名: " + username);
    System.out.println("  密码: " + password);
    System.out.println("  名称: " + name);
    System.out.println("  上下文: " + context);

    // 替换原始的 GenerateTestFile 调用
    // 假设 GenerateTestFile 是一个接受字符串参数和文件名的函数
    // GenerateTestFile("Name:" + name + "-UserName:" + username + "-Password:" + password + "-Context:" + context, "output.txt");
} else {
    System.out.println("未找到配置: " + targetConfigName);
}

// 如果需要遍历所有配置并进行相同操作，可以这样做：
System.out.println("\n批量处理所有配置:");
for (Map.Entry<String, HashMap<String, String>> entry : allConfigurations.entrySet()) {
    String confName = entry.getKey();
    HashMap<String, String> configData = entry.getValue();

    System.out.println("处理 " + confName + ": " +
                       "Name:" + configData.get("Name") + 
                       "-UserName:" + configData.get("UserName") + 
                       "-Password:" + configData.get("Password") + 
                       "-Context:" + configData.get("Context"));
    // GenerateTestFile(...)
}