Java实现post请求详细代码(带有参数)
作者：FJ.
这篇文章主要给大家介绍了关于Java实现带有参数post请求的相关资料,文中通过代码示例介绍的非常详细,对大家学习或者使用Java具有一定的参考学习价值,需要的朋友可以参考下
代码示例：
package Sort.pay;
import net.sf.json.JSONObject;
import org.apache.commons.codec.digest.DigestUtils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.*;
public class Pay {
public static void main(String[] args) {
String url = "http://xxxxxx";//访问路径
Random random = new Random();
Map<String, Object> map = new HashMap<>();
map.put("authCode", "1423009170000001");
map.put("resource", "api.hl.order.pay.unified");
map.put("requestTime", "20230129105758");
map.put("versionNo", "1");
Map<String, Object> params = new HashMap<>();
params.put("businessOrderNo", random.nextInt(1000000000));//202105623000002
params.put("payAmount", "90.00");
params.put("remark", "购买山核桃20斤");
params.put("merchantNo", "771389");
params.put("operatorAccount", "19884151060");
params.put("deviceNo", "402102317000001");
params.put("notifyUrl", "http://testapi.liankok.com/notify/pay");
params.put("payExpireTime", "600");
params.put("limitPay", "1");
params.put("payUrlExpireTime", "60");
params.put("subject", "山核桃");
params.put("goodsTag", "guolicheng");
params.put("goodsInfo", "{\"receiptid\":\"323323\",\"costprice\":200.00,\"goodsdetail\":[{\"goodsid\":\"123123123\",\"goodsname\":\"小石头\",\"thirdgoodsid\":\"23323453\",\"quantity\":1,\"price\":5.00}]}");
map.putAll(params);
// map.put("params",params);
//排序集合
map = PaySortUtil.sortByKey(map);
//遍历输出拼接字符串
Set<String> keys = map.keySet();
String str = "";
for (String key : keys) {
str += key + "=" + map.get(key) + "&";
}
str = str.toLowerCase() + "U7iIPg2x1k";
//md5加密字符串
String md5sr = DigestUtils.md5Hex(str);
map.put("sign", md5sr);
Map<String, Object> map3 = new HashMap<>();//存放结果
//将需要比较删除的两个集合添加
map3.putAll(map);
map3.putAll(params);
//for - each遍历比较且删除
for (String a : map.keySet()) {
if (params.containsKey(a) || params.containsValue(map.get(a))) {
map3.remove(a);
}
}
map3.put("versionNo", "1");
map3.put("params", params);
System.out.println(map3);
JSONObject jsonObject=JSONObject.fromObject(map3);
System.out.println(jsonObject.toString());
String ss= Pay.sendPost(url,jsonObject.toString());
System.out.println(ss);
}
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("Content-Type", "application/json");
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.err.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;
}
}
class PaySortUtil {
public static Map<String, Object> sortByKey(Map<String, Object> map){
//创建一个带有比较器的TreeMap
Map<String, Object> treeMap = new TreeMap<>(String::compareTo);
//将你的map传入treeMap
treeMap.putAll(map);
return treeMap;
}
}pom文件所需依赖，有些依赖不是必需的，这里没有删除
<dependencies>
<!-- post请求的依赖-->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>4.5.2</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>16.0.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.78</version>
</dependency>
<!--MD5依赖-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>maven-surefire-common</artifactId>
<version>2.12.4</version>
</dependency>
<dependency>
<groupId>org.kie.modules</groupId>
<artifactId>org-apache-commons-httpclient</artifactId>
<version>6.2.0.CR2</version>
<type>pom</type>
</dependency>
<!-- JSONObject对象依赖的jar包 -->
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.9.3</version>
</dependency>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>net.sf.ezmorph</groupId>
<artifactId>ezmorph</artifactId>
<version>1.0.6</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.2.3</version>
<classifier>jdk15</classifier><!-- 指定jdk版本 -->
</dependency>
<!-- Json依赖架包下载 -->
</dependencies>
<properties>
<maven.compiler.source>7</maven.compiler.source>
<maven.compiler.target>7</maven.compiler.target>
</properties>附：java使用post请求带参（放在body中）访问外部连接
java使用post请求带参（放在body中）访问外部连接
package com.bxzn.bxgd.service.impl;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.bxzn.bxgd.util.yuntai.HTTPClientUtil;
import com.bxzn.bxgd.util.yuntai.HttpsClientUtil;
import netscape.javascript.JSObject;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
JSONObject jsonObject = new JSONObject();
jsonObject.put("create_time", checkLog.getCreateTime());
jsonObject.put("camera_loc", checkLog.getCameraLoc());
jsonObject.put("state", checkLog.getState());
jsonObject.put("type", checkLog.getType());
jsonObject.put("attach_file", checkLog.getAttachFile());
jsonObject.put("level", checkLog.getLevel());
HTTPClientUtil.sendPost(urls, null, JSON.toJSONString(jsonObject));HTTPClientUtil类
package com.bxzn.bxgd.util.yuntai;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.bxzn.bxgd.util.socket.WebSocket;
import com.bxzn.bxgd.util.socket.WssSocket;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.DeleteMethod;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.PutMethod;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.auth.AuthScope;
import org.apache.http.HttpEntity;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties;
import javax.sound.sampled.*;
import javax.sql.rowset.serial.SerialBlob;
import java.io.*;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.sql.Blob;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Stream;
/**
* 和云台进行http的连接
*
* @author xxy
*/
public class HTTPClientUtil {
/**
* 编码格式。发送编码格式统一用UTF-8
*/
private static final String ENCODING = "UTF-8";
/**
* 设置连接超时时间，单位毫秒。
*/
private static final Integer CONNECT_TIMEOUT = 6000;
/**
* 请求获取数据的超时时间(即响应时间)，单位毫秒。
*/
private static final Integer SOCKET_TIMEOUT = 6000;
/**
* @param url 请求地址
* @param data 只支持JSON对象（com.alibaba.fastjson.JSONObject）
* @return String
* @Title:POST请求
* @Decription:发送POST请求，data参数只支持JSON对象（com.alibaba.fastjson.JSONObject）
*/
public static String sendPost(String url, Map<String, String> header, JSONObject data) throws IOException {
// 设置默认请求头
Map<String, String> headers = new HashMap<>();
if (header != null) {
headers = header;
} else {
headers.put("Content-Type", "application/json;charset=utf-8");
}
return doPostByJSON(url, headers, data, ENCODING);
}
/**
* @param url 请求地址
* @param data 只支持JSON对象（com.alibaba.fastjson.JSONObject）
* @return String
* @Title:POST请求
* @Decription:发送POST请求，data参数只支持JSON对象（com.alibaba.fastjson.JSONObject）
*/
public static String sendPost(String url, Map<String, String> header, String data) throws IOException {
// 设置默认请求头
Map<String, String> headers = new HashMap<>();
if (header != null) {
headers = header;
} else {
headers.put("Content-Type", "application/json;charset=utf-8");
}
return doPostByJSON(url, headers, JSONObject.parseObject(data), ENCODING);
}
/**
* @param url 请求地址
* @param headers Map集合的请求头参数
* @param params Map集合(输入参数为JSON对象)
* @return String
* @Title POST请求（默认编码：UTF-8）
*/
public static String sendPost(String url, Map<String, String> headers, Map<String, String> params) throws IOException {
// 将map转成json
JSONObject data = JSONObject.parseObject(JSON.toJSONString(params));
return doPostByJSON(url, headers, data, ENCODING);
}
/**
* @param url 请求地址
* @param headers 请求头
* @param data 请求实体
* @param encoding 字符集
* @return String
* @throws IOException
* @Title: sendPost
* @Description: TODO(发送post请求)
*/
private static String doPostByJSON(String url, Map<String, String> headers, JSONObject data, String encoding) throws IOException {
// 请求返回结果
String resultJson = null;
// 创建Client
CloseableHttpClient client = HttpClients.createDefault();
// 发送请求,返回响应对象
CloseableHttpResponse response = null;
// 创建HttpPost对象
HttpPost httpPost = new HttpPost();
/**
* setConnectTimeout：设置连接超时时间，单位毫秒。
* setConnectionRequestTimeout：设置从connect Manager(连接池)获取Connection
* 超时时间，单位毫秒。这个属性是新加的属性，因为目前版本是可以共享连接池的。
* setSocketTimeout：请求获取数据的超时时间(即响应时间)，单位毫秒。
* 如果访问一个接口，多少时间内无法返回数据，就直接放弃此次调用。
*/
RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
httpPost.setConfig(requestConfig);
try {
// 设置请求地址
httpPost.setURI(new URI(url));
// 设置请求头
packageHeader(headers, httpPost);
// 设置实体
httpPost.setEntity(new StringEntity(JSON.toJSONString(data), encoding));
// httpPost.addHeader("Content-Type", "application/json;charset=utf-8");
// 发送请求,返回响应对象
response = client.execute(httpPost);
// 获取响应状态
int status = response.getStatusLine().getStatusCode();
if (status != HttpStatus.SC_OK) {
System.out.println("响应失败，状态码：" + status);
}
// 获取响应结果
resultJson = EntityUtils.toString(response.getEntity(), encoding);
} catch (Exception e) {
e.printStackTrace();
} finally {
release(response, client);
}
return resultJson;
}
/**
* Description: 封装请求头
*
* @param params
* @param httpMethod
*/
public static void packageHeader(Map<String, String> params, HttpRequestBase httpMethod) {
// 封装请求头
if (params != null) {
Set<Map.Entry<String, String>> entrySet = params.entrySet();
for (Map.Entry<String, String> entry : entrySet) {
// 设置到请求头到HttpRequestBase对象中
httpMethod.setHeader(entry.getKey(), entry.getValue());
}
}
}
/**
* Description: 释放资源
*
* @param httpResponse
* @param httpClient
* @throws IOException
*/
public static void release(CloseableHttpResponse httpResponse, CloseableHttpClient httpClient) throws IOException {
// 释放资源
if (httpResponse != null) {
httpResponse.close();
}
if (httpClient != null) {
httpClient.close();
}
}
}然后自己写个测试类就行，顺便一提，HTTPClientUtil.sendPost(urls, null, JSON.toJSONString(jsonObject));这个方法返回值取决于服务器的返回值，是字符串类型
总结
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