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1.引入jar包
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
版本的话 会根据boot自动导入的似乎 ssm ssh的话 百度个版本看看 反正是这个包
2.工具类
import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
@Slf4j
public class HttpUtil {
private static final String ENCODING = "UTF-8";
public static String post(String url, Map<String, String> paramsMap) {
CloseableHttpClient client = HttpClients.createDefault();
String responseText = "";
CloseableHttpResponse response = null;
try {
HttpPost method = new HttpPost(url);
if (paramsMap != null) {
List<NameValuePair> paramList = new ArrayList<NameValuePair>();
for (Map.Entry<String, String> param : paramsMap.entrySet()) {
NameValuePair pair = new BasicNameValuePair(param.getKey(), param.getValue());
paramList.add(pair);
}
method.setEntity(new UrlEncodedFormEntity(paramList, ENCODING));
}
response = client.execute(method);
HttpEntity entity = response.getEntity();
if (entity != null) {
responseText = EntityUtils.toString(entity);
}
} catch (Exception e) {
log.error("http request failed",e);
} finally {
try {
response.close();
} catch (Exception e) {
log.error("",e);
}
}
return responseText;
}
public static String get(String url, Map<String, String> paramsMap) {
CloseableHttpClient client = HttpClients.createDefault();
String responseText = "";
CloseableHttpResponse response = null;
try {
String getUrl = url+"?";
if (paramsMap != null) {
for (Map.Entry<String, String> param : paramsMap.entrySet()) {
getUrl += param.getKey() + "=" + URLEncoder.encode(param.getValue(), ENCODING)+"&";
}
}
HttpGet method = new HttpGet(getUrl);
response = client.execute(method);
HttpEntity entity = response.getEntity();
if (entity != null) {
responseText = EntityUtils.toString(entity);
}
} catch (Exception e) {
log.error("http request failed",e);
} finally {
try {
response.close();
} catch (Exception e) {
log.error("",e);
}
}
return responseText;
}
}
用法很清晰了, 无论post get 请求 , 都传入一个地址 和 map封装的参数组合 他会自己转换的,map 的key value 还是挺好用。
3.闲谈
没什么好扯的 这个对接第三方很好用 代码也会简洁很多