① java中怎样用post,get,put请求
java中用post,get,put请求方法:
public static String javaHttpGet(String url,String charSet){
String resultData = null;
try {
URL pathUrl = new URL(url); //创建一个URL对象
HttpURLConnection urlConnect = (HttpURLConnection) pathUrl.openConnection(); //打开一个HttpURLConnection连接
urlConnect.setConnectTimeout(30000); // 设置连接超时时间
urlConnect.connect();
if (urlConnect.getResponseCode() == 200) { //请求成功
resultData = readInputStream(urlConnect.getInputStream(), charSet);
}
} catch (MalformedURLException e) {
LogL.getInstance().getLog().error("URL出错!", e);
} catch (IOException e) {
LogL.getInstance().getLog().error("读取数据流出错!", e);
}
return resultData;
}
public static String javaHttpPost(String url,Map<String,Object> map,String charSet){
String resultData=null;
StringBuffer params = new StringBuffer();
try {
Iterator<Entry<String, Object>> ir = map.entrySet().iterator();
while (ir.hasNext()) {
Map.Entry<String, Object> entry = (Map.Entry<String, Object>) ir.next();
params.append(URLEncoder.encode(entry.getKey(),charSet) + "=" + URLEncoder.encode(entry.getValue().toString(), charSet) + "&");
}
byte[] postData = params.deleteCharAt(params.length()).toString().getBytes();
URL pathUrl = new URL(url); //创建一个URL对象
HttpURLConnection urlConnect = (HttpURLConnection) pathUrl.openConnection();
urlConnect.setConnectTimeout(30000); // 设置连接超时时间
urlConnect.setDoOutput(true); //post请求必须设置允许输出
urlConnect.setUseCaches(false); //post请求不能使用缓存
urlConnect.setRequestMethod("POST"); //设置post方式请求
urlConnect.setInstanceFollowRedirects(true);
urlConnect.setRequestProperty("Content-Type","application/x-www-form-urlencoded; charset="+charSet);// 配置请求Content-Type
urlConnect.connect(); // 开始连接
DataOutputStream dos = new DataOutputStream(urlConnect.getOutputStream()); // 发送请求参数
dos.write(postData);
dos.flush();
dos.close();
if (urlConnect.getResponseCode() == 200) { //请求成功
resultData = readInputStream(urlConnect.getInputStream(),charSet);
}
} catch (MalformedURLException e) {
LogL.getInstance().getLog().error("URL出错!", e);
} catch (IOException e) {
LogL.getInstance().getLog().error("读取数据流出错!", e);
} catch (Exception e) {
LogL.getInstance().getLog().error("POST出错!", e);
}
return resultData;
}
② java HttpPost怎么传递参数
public class HttpURLConnectionPost {
/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
readContentFromPost();
}
public static void readContentFromPost() throws IOException {
// Post请求的url,与get不同的是不需要带参数
URL postUrl = new URL("http://www.xxxxxxx.com");
// 打开连接
HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();
// 设置是否向connection输出,因为这个是post请求,参数要放在
// http正文内,因此需要设为true
connection.setDoOutput(true);
// Read from the connection. Default is true.
connection.setDoInput(true);
// 默认是 GET方式
connection.setRequestMethod("POST");
// Post 请求不能使用缓存
connection.setUseCaches(false);
//设置本次连接是否自动重定向
connection.setInstanceFollowRedirects(true);
// 配置本次连接的Content-type,配置为application/x-www-form-urlencoded的
// 意思是正文是urlencoded编码过的form参数
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
// 连接,从postUrl.openConnection()至此的配置必须要在connect之前完成,
// 要注意的是connection.getOutputStream会隐含的进行connect。
connection.connect();
DataOutputStream out = new DataOutputStream(connection
.getOutputStream());
// 正文,正文内容其实跟get的URL中 '? '后的参数字符串一致
String content = "字段名=" + URLEncoder.encode("字符串值", "编码");
// DataOutputStream.writeBytes将字符串中的16位的unicode字符以8位的字符形式写到流里面
out.writeBytes(content);
//流用完记得关
out.flush();
out.close();
//获取响应
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = reader.readLine()) != null){
System.out.println(line);
}
reader.close();
//该干的都干完了,记得把连接断了
connection.disconnect();
}
关于Java HttpURLConnection使用
public static String sendPostValidate(String serviceUrl, String postData, String userName, String password){
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
log.info("POST接口地址:"+serviceUrl);
URL realUrl = new URL(serviceUrl);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
HttpURLConnection httpUrlConnection = (HttpURLConnection) conn;
// 设置通用的请求属性
httpUrlConnection.setRequestProperty("accept","*/*");
httpUrlConnection.setRequestProperty("connection", "Keep-Alive");
httpUrlConnection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
httpUrlConnection.setRequestMethod("POST");
httpUrlConnection.setRequestProperty("Content-Type","application/json;charset=UTF-8");
Base64 base64 = new Base64();
String encoded = base64.encodeToString(new String(userName+ ":" +password).getBytes());
httpUrlConnection.setRequestProperty("Authorization", "Basic "+encoded);
// 发送POST请求必须设置如下两行
httpUrlConnection.setDoOutput(true);
httpUrlConnection.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(new OutputStreamWriter(httpUrlConnection.getOutputStream(),"utf-8"));
// 发送请求参数
out.print(postData);
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(httpUrlConnection.getInputStream(),"utf-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
//
// if (!"".equals(result)) {
// BASE64Decoder decoder = new BASE64Decoder();
// try {
// byte[] b = decoder.decodeBuffer(result);
// result = new String(b, "utf-8");
// } catch (Exception e) {
// e.printStackTrace();
// }
// }
return result;
} catch (Exception e) {
log.info("调用异常",e);
throw new RuntimeException(e);
}
//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 e){
log.info("关闭流异常",e);
}
}
}
}
③ java 测试post请求 在body里面传递参数怎么设置,怎么接收
定义一个变量TestObject obj = new TestObject();
然后把 obj 作为参数传递给一个方法。
如果在这个方法中,只能改变obj指向的这个对象的内容,那就是“值传递”,传过去的值就是指向这个对象的指针。
如果在这个方法中通过操作,使得返回后的obj指向另外一个对象(通过equal判断返回来的对象是否与原对象在内存中指向同一内存地址),那就是“引用传递”,传过去的是对这个指针变量的“引用”。
④ java怎么发送post请求参数
/**
* 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,请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常!"+e);
e.printStackTrace();
}
//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.printStackTrace();
}
}
return result;
}
⑤ java post请求问号携带参数跟表单里的参数有什么不一样吗
什么东西?不是很明白你要问的。
请求一般有两种,post、get
post:参数在requestBody里面,你也可以强行放在请求链接后面
get:参数一般在请求链接后面,后端获取的时候用requestparams,也可以不写
表单提交,其实就是参数封装在表单里面,然后再提交,是一种方便快捷的提交方法。对参数不会有什么影响。
怎么处理参数,最重要的还是要看框架,框架的不同,后端获取参数的写法一般也有所不同
⑥ java post请求参数怎么写
//serverURL url地址
HttpPost httpPost = new HttpPost(serverURL);
//param 为参数
StringEntity entity = new StringEntity(param);
entity.setContentType("application/x-www-form-urlencoded");
httpPost.setEntity(entity);
HttpResponse httpResponse = httpClient.execute(httpPost);
还可以用map作为参数
List<NameValuePair> formparams = new ArrayList<NameValuePair>();
if(param!=null){
Set set = param.keySet();
Iterator iterator = set.iterator();
while (iterator.hasNext()) {
Object key = iterator.next();
Object value = param.get(key);
formparams.add(new BasicNameValuePair(key.toString(), value.toString()));
}
}
⑦ 怎么使用java模拟post请求
你要导入httpclient的jar包,要是你请求参数格式是json的或者返回的是json格式数据,你还需要导入json包
/**
* post请求
* @param url url地址
* @param jsonParam 参数
* @param noNeedResponse 不需要返回结果
* @return
*/
public static JSONObject httpPost(String url,JSONObject jsonParam, boolean noNeedResponse){
//post请求返回结果
DefaultHttpClient httpClient = new DefaultHttpClient();
JSONObject jsonResult = null;
⑧ java post时设置参数的问题求助
url,[data],[callback],[type]
其中url为必填项,其值为请求的地址
data为可填可不填项,其值为要传送的key/value的值
callback为可填可不填项,为回调函数,当请求成功后,执行的内容
type为可填可不填项,为返回的数据格式
⑨ 如何使用java模拟post请求
两种选择:一、使用httpclient,二使用java自带的类库。
1、java自带类库:
public static String call(String address,String params) {
URL url = null;
HttpURLConnection httpurlconnection = null;
StringBuilder result = new StringBuilder();
try {
url = new URL(address);
// 以post方式请求
httpurlconnection = (HttpURLConnection) url.openConnection();
httpurlconnection.setDoOutput(true);
httpurlconnection.setRequestMethod("POST");
if(null!=params&¶ms.length()>0){
httpurlconnection.getOutputStream().write(params.getBytes());
httpurlconnection.getOutputStream().flush();
httpurlconnection.getOutputStream().close();
}
// 获取页面内容
java.io.InputStream in = httpurlconnection.getInputStream();
java.io.BufferedReader breader = new BufferedReader(new InputStreamReader(in, Config.DEFAULT_CHARSET));
String str = breader.readLine();
while (str != null) {
result.append(str);
str = breader.readLine();
}
breader.close();
in.close();
} catch (Exception e) {
} finally {
if (httpurlconnection != null)
httpurlconnection.disconnect();
}
return result.toString().trim();
}
2、httpclient:
public static String post(String url,String params){
HttpClient httpClient = new DefaultHttpClient();
StringBuilder builder = new StringBuilder();
HttpPost post = new HttpPost(url);
try {
if(null!=params){
post.setEntity(new StringEntity(params,"UTF-8"));
}
HttpResponse resp = httpClient.execute(post);
int statusCode = resp.getStatusLine().getStatusCode();
if(statusCode<=304){
HttpEntity entity = resp.getEntity();
if (entity == null) {
throw new IllegalArgumentException("HTTP entity may not be null");
}
if (entity.getContentLength() > Integer.MAX_VALUE) {
throw new IllegalArgumentException("HTTP entity too large to be buffered in memory");
}
int i = (int)entity.getContentLength();
i = i<0 ? 4096 : i;
final InputStream instream = entity.getContent();
final Reader reader = new InputStreamReader(instream, Config.DEFAULT_CHARSET);
final CharArrayBuffer buffer = new CharArrayBuffer(i);
final char[] tmp = new char[1024];
int l;
while((l = reader.read(tmp)) != -1) {
buffer.append(tmp, 0, l);
}
builder.append(buffer);
}
post.abort();
} catch (Exception e) {
post.abort();
}
return builder.toString().trim();
}
⑩ Java sendPost请求方法如何加入参数
/**
* 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,请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常!"+e);
e.printStackTrace();
}
//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.printStackTrace();
}
}
return result;
}