goja-web/src/main/java/goja/mvc/kits/Servlets.java
public static String encodeParameterStringWithPrefix(Map<String, Object> params, String prefix) {
        if ((params == null) || (params.size() == 0)) {
            return "";
        }

        if (prefix == null) {
            prefix = "";
        }

        StringBuilder queryStringBuilder = new StringBuilder();
        Iterator<Map.Entry<String, Object>> it = params.entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry<String, Object> entry = it.next();
            queryStringBuilder.append(prefix).append(entry.getKey()).append('=').append(entry.getValue());
            if (it.hasNext()) {
                queryStringBuilder.append('&');
            }
        }
        return queryStringBuilder.toString();
    }
public static String encodeParameterStringWithPrefix(Map<String, Object> params, String prefix) {
        if ((params == null) || (params.size() == 0)) {
            return "";
        }

        if (prefix == null) {
            prefix = "";
        }

        StringBuilder queryStringBuilder = new StringBuilder();
        Iterator<Map.Entry<String, Object>> it = params.entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry<String, Object> entry = it.next();
            queryStringBuilder.append(prefix).append(entry.getKey()).append('=').append(entry.getValue());
            if (it.hasNext()) {
                queryStringBuilder.append('&');
            }
        }
        return queryStringBuilder.toString();
    }
组合Parameters生成Query String的Parameter部分, 并在paramter name上加上prefix.

@see #getParametersStartingWith