如何使用java调用c#提供的webapi接口

可以使用apache.commons下的一个httpclient的库，c#使用的asp.net下使用webapi对外提供http服务，然后发布在iis服务器上，就可以对外暴露接口了

一，引入apache.commons依赖

二，在你需要调用的接口中编辑请求信息，比如数据格式，编码格式等

废话不多说，直接上代码，不过这里要区分一下，get请求和post请求是有区别的，其次post请求参数的格式也好多种，我这边只列举json格式的；

//get请求
 @GetMapping("/web/get")
    public String getHttp() {
        String responseMsg = "";
        HttpClient httpClient = new HttpClient();

        GetMethod getMethod = new GetMethod("http://192.168.31.124:8086/actionApi/UserInfo/Getsstring");
        getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,new DefaultHttpMethodRetryHandler());
        try {
            httpClient.executeMethod(getMethod);
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            InputStream in = getMethod.getResponseBodyAsStream();
            int len = 0;
            byte[] buf = new byte[1024];
            while((len=in.read(buf))!=-1){
                out.write(buf, 0, len);
            }
            responseMsg = out.toString("UTF-8");
        } catch (HttpException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //释放连接
            getMethod.releaseConnection();
        }
        return responseMsg;
    }

//post请求
@PostMapping("/add/user")
    public String postHttp(Student student) throws UnsupportedEncodingException, JsonProcessingException {
        ObjectMapper JSON=new ObjectMapper();
        String responseMsg = "";
        String json=JSON.writeValueAsString(student);
        HttpClient httpClient = new HttpClient();
        httpClient.getParams().setContentCharset("UTF-8");
        PostMethod postMethod = new PostMethod("http://192.168.31.124:8086/actionApi/UserInfo/InsertData");
        RequestEntity entity = new StringRequestEntity(json,"application/json", "UTF-8");
        postMethod.setRequestEntity(entity);
        try {
            httpClient.executeMethod(postMethod);
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            InputStream in = postMethod.getResponseBodyAsStream();
            int len = 0;
            byte[] buf = new byte[1024];
            while((len=in.read(buf))!=-1){
                out.write(buf, 0, len);
            }
            responseMsg = out.toString("UTF-8");
        } catch (HttpException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            postMethod.releaseConnection();
        }
        return responseMsg;
    }