Tools
//GET//
/**
* get请求
*
* @param url 目标地址
* @param param 参数
* @return String 响应信息
*/
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)");
// 建立连接
connection.connect();
// 定义 BufferedReader读取URL的响应
in = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
log.error("GET请求异常{}" , e.getMessage());
} finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.getMessage();
}
}
return result;
}
////////////////////////////////POST///////////////////////////
/**
* 向指定 URL 发送POST方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数，json
* @return 响应结果
*/
public static String sendPost(String url, String param) {
OutputStreamWriter out = null;
BufferedReader in = null;
String result = "";
//创建连接
try {
URL httpUrl = null; //HTTP URL类 用这个类来创建连接
//创建URL
httpUrl = new URL(url);
//建立连接
HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
conn.setRequestProperty("connection", "keep-alive");
conn.setUseCaches(false);//缓存关闭
conn.setInstanceFollowRedirects(true);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.connect();
//POST请求
out = new OutputStreamWriter(conn.getOutputStream());
out.write(param);
out.flush();
//读取响应
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
in.close();
// 断开连接
conn.disconnect();
} catch (Exception e) {
log.error("发送 POST 请求出现异常！{}" , e.getMessage());
}
//使用finally块来关闭输出流、输入流
finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.getMessage();
}
}
return result;
}
///PUT/
/**
* put请求
*
* @param url 目标地址
* @param map 参数
* @return String响应结果
*/
public static String sendPut(String url, Map map) {
String encode = "utf-8";
CloseableHttpClient closeableHttpClient = HttpClients.createDefault();
HttpPut httpput = new HttpPut(url);
httpput.setHeader("Accept", "*/*");
httpput.setHeader("Accept-Encoding", "gzip, deflate");
httpput.setHeader("Cache-Control", "no-cache");
httpput.setHeader("Connection", "keep-alive");
httpput.setHeader("Content-Type", "application/json;charset=UTF-8");
//请求参数处理
StringEntity stringEntity = new StringEntity(JSON.toJSONString(map), encode);
httpput.setEntity(stringEntity);
String content = null;
CloseableHttpResponse httpResponse = null;
try {
//响应信息
httpResponse = closeableHttpClient.execute(httpput);
HttpEntity entity = httpResponse.getEntity();
content = EntityUtils.toString(entity, encode);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
httpResponse.close();
} catch (IOException e) {
e.getMessage();
}
}
try {
closeableHttpClient.close(); //关闭连接、释放资源
} catch (IOException e) {
e.getMessage();
}
return content;
}
/////////////////////////////socket////////////////////////
/**
* socket发送数据
*
* @param text 数据
* @param host 地址
* @param port 端口
*/
public static void forwardSocket(String text, String host, Integer port) {
Socket socket = null;
OutputStream outputStream = null;
DataOutputStream dataOutputStream = null;
try {
socket = new Socket(host, port);
outputStream = socket.getOutputStream();
//把输出流封装在DataOutputStream中
dataOutputStream = new DataOutputStream(outputStream);
//使用writeUTF发送字符串
dataOutputStream.writeUTF(text);
dataOutputStream.close();
socket.close();
} catch (IOException e) {
log.error("socket发送数据-失败{}", e.getMessage());
} finally {
try {
if (dataOutputStream != null) {
dataOutputStream.close();
}
if (socket != null) {
socket.close();
}
} catch (Exception ex) {
log.error("error to socket close :{}", ex.getMessage());
}
}
}
Use Cases
get not much to say about the
post request
/**
* 上传信息
*/
@RequestMapping(value = "/uploadEmp", method = RequestMethod.POST)
@ResponseBody
public JsonData uploadData(Demo emp) {
int code = 1;
String message = "";
try {
String result = GetPostPutUtil.sendPost("http://xxx:1012/api/demo", JSON.toJSONString(emp));//实体类对象json化，alibaba.fastjson
//获取响应状态
boolean contains1 = result.contains("\"code\":");
if (contains1) {
code = Integer.parseInt(result.split("\"code\":")[1].split(",", 0)[0]);
}
//获取响应信息
boolean contains2 = result.contains("\"message\":\"");
if (contains2) {
message = result.split("\"message\":\"")[1].split("\"}", 0)[0];
}
///省略//
}
响应结果：{
"code":0,"message":"上传成功"}
PUT request
/**
* 删除
*
* @return String
*/
@RequestMapping(value = "/deleteDemo")
@ResponseBody
public String deleteDemo() {
List<String> id = new ArrayList();
id.add("000012");
HashMap<String,Object> map = new HashMap<String,Object>();
map.put("demoName", "张三");
map.put("id", id);
return GetPostPutUtil.sendPut("http://xxxx:1012/api/delete", map);
}
响应结果：{
"code":0,"message":"删除成功"}