httpRequest请求方法

Myth丶恋晨 2022-07-13 20:44 179阅读 0赞

业务场景：

公司的多个项目之间要进行RestHub接口的调用，采用HTTP的方式，参数用的是JSON，方法如下：

public static StringBuffer post(String url, JSONObject json) {
        CloseableHttpClient client = HttpClientBuilder.create().build();
        HttpPost post = new HttpPost(url);
        BufferedReader reader = null;
        StringBuffer sb = new StringBuffer("");
        StringEntity s = new StringEntity(json.toString(), "UTF-8");
        s.setContentEncoding("UTF-8");
        s.setContentType("application/json");
        post.setEntity(s);
        HttpResponse res = null;
        HttpEntity entity = null;
        InputStreamReader isr = null;
        try {
            res = client.execute(post);
            if (res.getStatusLine().getStatusCode() == 200) {
                entity = res.getEntity();
                isr =  new InputStreamReader(entity.getContent(), "utf-8");
                reader = new BufferedReader(isr);
                String lines;
                while ((lines = reader.readLine()) != null) {
                    sb.append(lines);
                }
                return sb;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (isr != null) {
                    isr.close();
                }
                if (reader != null) {
                    reader.close();
                }
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sb;
    }

说点儿题外话，需要注意的地方：

1、代码的异常catch的地方不要用e.printStackTrace();而要采用Logger日志的输出方式

2、finally要记得关资源，资源的关闭顺序要与打开顺序相反，关闭之前要有非空判断(判断很重要，sonar会扫描出此处代码有严重问题，find bugs工具也会扫除此处代码有问题)