Java创建的HttpServer返回json数据
问题出现的环境背景及自己尝试过哪些方法
在我实现HttpHandler,重写handle方法中,
若向responseBody写入普通字符串(如:"hello"),浏览器中访问该方法可以得到对应的数据。
但是写入json字符串(如:"{"pid":"510229197206267348","pname":"张三"}"),浏览器中访问Status Code: 200 OK,但Status却是failed.
我猜想应该是后台header中设置的数据格式类型,但是设置了headers.set("Content-Type", "application/json; charset=utf-8");也没有效果。
写入"{"pid":"510229197206267348","pname":"张三"}"访问服务方法截图:
写入"hello word"访问服务方法截图:
相关代码
public static void main(String[] arg) throws Exception { HttpServer server = HttpServer.create(new InetSocketAddress(8001), 0);
server.createContext("/post", new BasicPostHttpHandler());
// 使用默认的 excutor
server.setExecutor(null);
server.start();
}
public class BasicPostHttpHandler implements HttpHandler{
@Override
public void handle(HttpExchange httpExchange) throws IOException {
InputStream is = httpExchange.getRequestBody();
String requestData = is2string(is);
System.out.println("request: " + requestData);
String response = "{\"pid\":\"510229197206267348\",\"pname\":\"张三\"}"; // 写回这个数据就会failed
// String response = "hello world"; // 若写回这个数据则没有问题
System.out.println("response: " + response);
is.close();
Headers headers = httpExchange.getResponseHeaders();
headers.set("Content-Type", "application/json; charset=utf-8");
headers.set("Access-Control-Allow-Origin", "*");
headers.set("Access-Control-Allow-Methods","GET,POST,PUT,DELETE,OPTIONS");
headers.set("Access-Control-Allow-Headers", "Origin,X-Requested-With,Content-Type,Accept");
httpExchange.sendResponseHeaders(200, response.length());
OutputStream os = httpExchange.getResponseBody();
os.write(response.getBytes());
os.close();
}
private String is2string(InputStream is) throws IOException {
final int bufferSize = 1024;
final char[] buffer = new char[bufferSize];
final StringBuilder out = new StringBuilder();
Reader in = new InputStreamReader(is, "UTF-8");
for (; ; ) {
int rsz = in.read(buffer, 0, buffer.length);
if (rsz < 0)
break;
out.append(buffer, 0, rsz);
}
return out.toString();
}
}
你期待的结果是什么?实际看到的错误信息又是什么?
回答:
中文字节的表示问题,
httpExchange.sendResponseHeaders(200, response.length()); 改为httpExchange.sendResponseHeaders(HttpURLConnection.HTTP_OK, response.getBytes().length);即可
回答:
@半个夏天 这里我也稍微有一点研究了,你可以去看看我这个 ---> java解析http,可以解决你的问题
回答:
跟json没关系!你的是中文问题!
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