Java中安全分割含分隔符的字符串：掌握split方法的limit参数

String userPass = "service1.password=das-=asdwe=12f=";
String[] parts = userPass.split("=");
// 预期结果：parts[0] = "service1.password", parts[1] = "das-=asdwe=12f="
// 实际结果：
// parts[0] = "service1.password"
// parts[1] = "das-"
// parts[2] = "asdwe"
// parts[3] = "12f"
// parts[4] = "" (因为末尾有=)

String userPass = "service1.password=das-=asdwe=12f=";
String[] parts = userPass.split("=", 2);

// 此时，parts数组将包含：
// parts[0] = "service1.password"
// parts[1] = "das-=asdwe=12f="

// 我们可以安全地提取键和值
String user = parts[0];
String pass = parts[1];

System.out.println("User: " + user); // 输出: User: service1.password
System.out.println("Pass: " + pass); // 输出: Pass: das-=asdwe=12f=

import java.util.HashMap;
import java.util.Map;

public class StringSplitWithLimit {

    public static void main(String[] args) {
        String[] configEntries = {
            "service1.password=dsjahdsahjk!sdafds",
            "service2.username=admin",
            "service3.api_key=key-with-=equal-signs",
            "service4.url=http://example.com?param1=value1&param2=value2"
        };

        Map<String, String> config = new HashMap<>();

        for (String entry : configEntries) {
            // 使用 limit = 2，确保只在第一个等号处分割
            String[] parts = entry.split("=", 2);

            if (parts.length == 2) {
                String key = parts[0];
                String value = parts[1];
                config.put(key, value);
                System.out.println("Parsed: Key='" + key + "', Value='" + value + "'");
            } else if (parts.length == 1 && !entry.contains("=")) {
                // 处理不包含分隔符的行，如果需要
                System.out.println("Warning: Entry '" + entry + "' does not contain a delimiter.");
            } else {
                // 异常情况，例如空行或只有分隔符
                System.out.println("Error: Could not parse entry '" + entry + "' correctly.");
            }
        }

        System.out.println("\nFinal Configuration Map:");
        config.forEach((key, value) -> System.out.println(key + " -> " + value));
    }
}