idea向System.getenv()添加系统环境变量

idea中如何设置系统环境变量

背景

最近在接入阿里云的短信服务，在使用阿里云短信服务的SDK过程中想看看SDK中HttpUtil 中

public static String debugHttpRequest(HttpRequest request) {
        if (isHttpDebug) {
            StringBuilder debugString = new StringBuilder();

            String sysUrl = request.getSysUrl();
            URL url = null;
            try {
                url = new URL(sysUrl);
                debugString.append("> " + request.getSysMethod() + " " + url.getProtocol().toUpperCase() + "/1.1\n> ");
                debugString.append("Host : " + url.getHost() + "\n> ");
            } catch (MalformedURLException e) {
                debugString.append("> " + request.getSysMethod() + " " + sysUrl + "\n> ");
                debugString.append("Host : " + sysUrl + "\n> ");
            }
            Map<String, String> requestHeaders = request.getSysHeaders();
            for (Entry<String, String> entry : requestHeaders.entrySet()) {
                debugString.append(entry.getKey() + " : " + entry.getValue() + "\n> ");
            }
            debugString.append("Request URL : " + sysUrl + "\n> ");
            if (isHttpContentDebug) {
                try {
                    debugString.append("\n" + request.getHttpContentString());
                } catch (ClientException e) {
                    debugString.append("\n" + "Can not parse response due to unsupported encoding : " + request
                            .getSysEncoding());
                }
            }
            log.info("\n" + debugString);
            return debugString.toString();
        } else {
            return null;
        }
    }

上述方法的debug信息，但是由于isHttpDebug是在静态代码块中通过读取系统环境变量判断的

static {
        Boolean flag = "sdk".equalsIgnoreCase(System.getenv("DEBUG"));
        isHttpDebug = flag;
        isHttpContentDebug = flag;
    }

所以来想办法如何设置这个DEBUG参数

读取系统环境变量

for (String s : System.getenv().keySet()) {
    System.out.println(s+":"+System.getenv(s));
}

设置系统环境变量

至此，通过idea设置程序运行系统环境变量就完成了。可以通过System.getenv()来查看设置的系统环境变量。