java访问controller示例

本文介绍了一种使用Java实现HTTP请求处理的方法,包括GET和POST请求的具体实现细节,并提供了调用外部接口的示例代码。
package  com.ocl.www.utils;

import  net.sf.json.JSONArray;
import  net.sf.json.JSONObject;
import  org.apache.http.NameValuePair;
import  org.apache.http.client.ClientProtocolException;
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.io.BufferedReader;
import  java.io.IOException;
import  java.io.InputStreamReader;
import  java.io.OutputStream;
import  java.net.*;
import  java.util.ArrayList;
import  java.util.List;
import  java.util.Map;
import  java.util.Set;

/**
* Created by Administrator on 2016/12/16.
*/
public class  OutServerUntils {

//private static String targetURL = "http://192.168.1.39:8012/ocl-search-server/solrArticleController/queryDocsTest";
//private static final String targetURL = "http://192.168.1.39:8012/ocl-search-server/article/selectAllArticle";

/**
* 处理get请求.
@param  url  请求路径
@return  json
*/
public  String get(String url,String sendstr){
//实例化httpclient
CloseableHttpClient httpclient = HttpClients. createDefault ();
//实例化get方法
HttpGet httpget =  new  HttpGet(url);

try  {
httpget.setURI( new  URI(httpget.getURI().toString() +  "?"  + sendstr));
catch  (URISyntaxException e) {
e.printStackTrace();
}
//请求结果
CloseableHttpResponse response =  null ;
String content = "" ;
try  {
//执行get方法
response = httpclient.execute(httpget);
if (response.getStatusLine().getStatusCode()== 200 ){
content = EntityUtils. toString (response.getEntity(), "utf-8" );
System. out .println(content);
}
catch  (ClientProtocolException e) {
e.printStackTrace();
catch  (IOException e) {
e.printStackTrace();
}
return  content;
}


/**
* 处理post请求.
@param  url  请求路径
@param  params  参数
@return  json
*/
public  String post(String url,Map<String, String> params){
//实例化httpClient
CloseableHttpClient httpclient = HttpClients. createDefault ();
//实例化post方法
HttpPost httpPost =  new  HttpPost(url);
//处理参数
List<NameValuePair> nvps =  new  ArrayList<NameValuePair>();
Set<String> keySet = params.keySet();
for (String key : keySet) {
nvps.add( new  BasicNameValuePair(key, params.get(key)));
}
//结果
CloseableHttpResponse response =  null ;
String content= "" ;
try  {
//提交的参数
UrlEncodedFormEntity uefEntity =  new  UrlEncodedFormEntity(nvps,  "UTF-8" );
//将参数给post方法
httpPost.setEntity(uefEntity);
//执行post方法
response = httpclient.execute(httpPost);
if (response.getStatusLine().getStatusCode()== 200 ){
content = EntityUtils. toString (response.getEntity(), "utf-8" );
System. out .println(content);
}
catch  (ClientProtocolException e) {
e.printStackTrace();
catch  (IOException e) {
e.printStackTrace();
}
return  content;
}



public static  String callInterface(String targetURL,String input,String requestMethod,String contentType){
String output =  null ;

try  {
URL targetUrl =  new  URL(targetURL);
HttpURLConnection httpConnection = (HttpURLConnection) targetUrl.openConnection();
httpConnection.setDoOutput( true );
httpConnection.setRequestMethod(requestMethod);
httpConnection.setRequestProperty( "Content-Type" , contentType);

//String input = "{\"id\":1,\"firstName\":\"Liam\",\"age\":22,\"lastName\":\"Marco\"}";
//String input = "{\"solrdata\":234}";
///String input = "{}";
OutputStream outputStream = httpConnection.getOutputStream();
outputStream.write(input.getBytes( "utf-8" ));
outputStream.flush();

if  (httpConnection.getResponseCode() !=  200 ) {
throw new  RuntimeException( "Failed : HTTP error code : "
+ httpConnection.getResponseCode());
}

BufferedReader responseBuffer =  new  BufferedReader( new  InputStreamReader((httpConnection.getInputStream())));

output = responseBuffer.readLine();
// System.out.println("Output from Server:\n");
//while ((output = responseBuffer.readLine()) != null) {
// System.out.println(output);
//}

httpConnection.disconnect();

catch  (MalformedURLException e) {

e.printStackTrace();

catch  (IOException e) {

e.printStackTrace();

}

return  output;
}

public static void  main(String[] args) {

// String targetURL = "http://192.168.1.39:8012/ocl-search-server/article/selectAllArticle";
// String input = "{}";

// String targetURL = "http://192.168.1.39:8012/ocl-search-server/solrArticleController/queryDocsTest";
// String input = "{\"solrdata\":234}";
//
// String data = OutServerUntils.callInterface(targetURL,input,"","application/x-www-form-urlencoded");
// System.out.println(JSONObject.fromObject(data).get("listarti"));
// System.out.println(JSONArray.fromObject(JSONObject.fromObject(data).get("listarti")).size());

// post请求方式
// OutServerUntils hd = new OutServerUntils();
// Map<String,String> map = new HashMap();
// map.put("appid","CALLBELL1");
// map.put("mtype","query");
// map.put("timestamp","timestamp");
// map.put("sign","73fadcd81c2970c0b602d026308266b7");
// map.put("params","{mobilePhone:15017573651}");
// hd.post("http://192.168.1.39/cas-server-webapp/api",map);

// get请求方式(参数写法有问题)
OutServerUntils hd =  new  OutServerUntils();
String sendstr =  "appid=CALLBELL1&mtype=query&timestamp=timestamp&sign=73fadcd81c2970c0b602d026308266b7&params={mobilePhone:15017573651}" ;
String content = hd.get( "http://192.168.1.39/cas-server-webapp/api" ,sendstr);
System. out .println(content); }
} 
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