public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常!" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
这是我的方法 调用B项目中的一个接口 返回的字符串是B项目的登录界面源码
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常!" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
这是我的方法 调用B项目中的一个接口 返回的字符串是B项目的登录界面源码
// 要调用的接口方法
String url = "http://192.168.1.101:8080/getJson";
HttpPost post = new HttpPost(url);
JSONObject jsonObject = null;
try {
StringEntity s = new StringEntity(date.toString());
s.setContentEncoding("UTF-8");
s.setContentType("application/json");
post.setEntity(s);
post.addHeader("content-type", "text/xml");
HttpResponse res = client.execute(post);
String response1 = EntityUtils.toString(res.getEntity());
System.out.println(response1);
if (res.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
String result = EntityUtils.toString(res.getEntity());// 返回json格式:
jsonObject = JSONObject.parseObject(result);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
return jsonObject;
你这边请求接口之前先去做token认证,然后在去调用这个接口就可以了。
返回什么是服务器那边可以设置的,不用太关心,主要是想办法确认正确的调用方式。