no suitable HttpMessageConverter found for response type [class java.io.InputStream]

你的名字 2024-03-31 16:26 82阅读 0赞

### 报错 ###

使用springrestful 获取流的时候，报错

@Autowired
    private RestTemplate restTemplate;

restTemplate.getForObject(url, InputStream.class);

请求报错：

Could not extract response: no suitable HttpMessageConverter found for response type [class java.io.InputStream] and content type [application/force-download]

### 方法1： 推荐使用 ###

使用 org.springframework.core.io.Resource.class 来接收

org.springframework.core.io.Resource forObject = restTemplate.getForObject(url, org.springframework.core.io.Resource.class);
    InputStream inputStream = Objects.requireNonNull(forObject).getInputStream();

### 方法2： ###

直接用httpclient 请求，可以直接获取到流：

public static InputStream sendGet(String url) {
            InputStream inputStream = null;
            try {
                // 创建URL对象
                URL connURL = new URL(url);
                // 打开URL连接
                java.net.HttpURLConnection httpConn = (java.net.HttpURLConnection) connURL.openConnection();
                // 设置通用属性
                httpConn.setRequestProperty("Accept", "*/*");
                httpConn.setRequestProperty("Connection", "Keep-Alive");
                httpConn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
                // 建立实际的连接
                httpConn.connect();
    
                inputStream = httpConn.getInputStream();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return inputStream;
        }

no suitable HttpMessageConverter found for response type [class java.io.InputStream]

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