Question

我实现了一些java函数。现在我必须通过html将结果呈现给用户。

public Object post()
{
    responseHeaders.put("Content-Type", "application/json");

    try
    {
        final User user = UC0_Login.getLoggedInUser(this);
        List<Measurement> mylist =  MeasurementService.getMeasurementsbyPatient(user.getUsername().toString());
        for(int i = 0; i < mylist.size(); i++) {
             Measurement mesPatient = mylist.get(i);
             DownloaderService.saveTxt(mesPatient);
            // System.out.println("Test Name:      " + mesPatient.getRequest().getPatient().getFirst_name().toString());
         }

    }
    catch(HttpException x)
    {
        x.printStackTrace();
        this.statusCode = x.getStatusCode();
        return "{ \"success\": false }";
    }
    catch(Exception x)
    {
        x.printStackTrace();
        this.statusCode = StatusCode.SERVER_ERROR_500;
        return "{ \"success\": false }";
    }
    String property = "java.io.tmpdir";
    String tempDir = System.getProperty(property);
    String result = "Your measurements have been saved at" + tempDir;

    return result;
}

我在Java类中实现了post（）。我还在后台创建了一个HttpServer。如代码所示，我返回一个String。如何在HTML中打印出该字符串？我如何从HTML获取输入（例如整数）到例如get（）函数？谢谢!!!

Answer 1

如果你基本上在寻找AJAX请求和响应，这里有一个很好的资源来学习如何。

https://blog.garstasio.com/you-dont-need-jquery/ajax/#posting

例如，

HTML

<p id="result"></p>

<form id="frm1" action="/action_page.php">
  Your input: <input type="text" id="myInput"><br><br>
  <input type="button" onclick="myFunction()" value="Submit">
</form>

JAVASCRIPT

var input = document.getElementById("myInput").value;
xhr = new XMLHttpRequest();
xhr.open('POST', 'Your URL Goes Here');
xhr.onload = function() {
    if (xhr.status === 200) {
        var response = xhr.responseText;
        document.getElementById("result").innerHTML = response;
    }
    else if (xhr.status !== 200) {
        alert('Request failed.  Returned status of ' + xhr.status);
    }
};
xhr.send(encodeURI('input=' + input)); // Use your API param keys here

getJSON - 如何打印出结果，以及如何检索输入？

1 个答案: