GWT:在GET请求中捕获URL参数

function getUrlParams() {
    var params = {};
    var search = window.location.search.substring(1);
    var pairs = search.split('&');

    for (var i = 0; i< pairs.length; i++) {
        var pair = pairs[i].split('=');
        params[pair[0]] = decodeURIComponent(pair[1]);
    }

    return params;
}

// 使用方法
var urlParams = getUrlParams();
console.log(urlParams.paramName);

// 获取指定参数
$paramValue = $_GET['paramName'];

// 或者遍历所有参数
foreach ($_GET as $paramName => $paramValue) {
    // 处理参数
}

import java.net.URL;
import java.net.URLDecoder;
import java.util.LinkedHashMap;
import java.util.Map;

public class Main {
    public static void main(String[] args) throws Exception {
        String url = "http://example.com?param1=value1&param2=value2";
        Map<String, String> params = getUrlParams(url);

        for (String paramName : params.keySet()) {
            System.out.println(paramName + ": " + params.get(paramName));
        }
    }

    public static Map<String, String> getUrlParams(String url) throws Exception {
        Map<String, String> params = new LinkedHashMap<>();
        String query = new URL(url).getQuery();

        if (query != null) {
            for (String param : query.split("&")) {
                String[] pair = param.split("=");
                String key = URLDecoder.decode(pair[0], "UTF-8");
                String value = "";

                if (pair.length > 1) {
                    value = URLDecoder.decode(pair[1], "UTF-8");
                }

                params.put(key, value);
            }
        }

        return params;
    }
}