java請求第三方介面遇到的跨域問題
自己專案中遇到的請求第三方介面跨域的問題：
首先專案中引入解決跨域的三個公共包；
包1：
package com.jeeplus.modules.zzybaseservice;
public class CyzHttpResponse {
protected String responseText;
protected String session;
public String getResponseText() {
return responseText;
}
public void setResponseText(String responseText) {
this.responseText = responseText;
}
public String getSession() {
return session;
}
public void setSession(String session) {
this.session = session;
}
}
包2：
package com.jeeplus.modules.zzybaseservice;
import java.io.BufferedReader;
import java.io.Closeable;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class CyzHttpUtils {
public static final String POST = "POST";
public static final String GET = "GET";
public static CyzHttpResponse doHttpPostJson(String strURL, String json, String session) {
return doHttpPost(strURL, true, json, session);
}
public static CyzHttpResponse doHttpGetJson(String strURL, String json, String session) {
return doHttpGet(strURL, true, json, session);
}
public static CyzHttpResponse doHttpPost(String strURL, String param, String session) {
return doHttpPost(strURL, false, param, session);
}
private static CyzHttpResponse doHttpPost(String strURL, boolean jsonParam, String param, String session) {
DataOutputStream out = null;
BufferedReader reader = null;
try {
URL url = new URL(strURL);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.setInstanceFollowRedirects(true);
connection.setRequestMethod(POST);
connection.setRequestProperty("Accept", "*/*");
connection.setRequestProperty("Connection", "keep-alive");
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36");
if(jsonParam) {
connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8"); //JSON錕斤拷式錕斤拷錕斤拷
}
else {
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8"); //錕斤拷�?�錕斤拷式錕斤拷錕斤�?
}
if(session != null) {
connection.setRequestProperty("Cookie", session);
}
connection.connect();
if(param != null) {
out = new DataOutputStream(connection.getOutputStream());
out.writeBytes(param);
out.flush();
out.close();
}
reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
StringBuilder builder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}
String sessionText = connection.getHeaderField("Set-Cookie");
connection.disconnect();
CyzHttpResponse httpResponse = new CyzHttpResponse();
httpResponse.setResponseText(builder.toString());
httpResponse.setSession(sessionText);
return httpResponse;
}
catch (Exception e) {
System.out.println("HTTP POST發生異常" + e.getLocalizedMessage());
}
finally {
close(out);
close(reader);
}
return null;
}
private static CyzHttpResponse doHttpGet(String strURL, boolean jsonParam, String param, String session) {
DataOutputStream out = null;
BufferedReader reader = null;
try {
URL url = new URL(strURL);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.setInstanceFollowRedirects(true);
connection.setRequestMethod(GET);
connection.setRequestProperty("Accept", "*/*");
connection.setRequestProperty("Connection", "keep-alive");
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36");
if(jsonParam) {
connection.setRequestProperty("Content-Type", "application/json; charset=UTF-8"); //JSON錕斤拷式錕斤拷錕斤拷
}
else {
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8"); //錕斤拷�?�錕斤拷式錕斤拷錕斤�?
}
if(session != null) {
connection.setRequestProperty("Cookie", session);
}
connection.connect();
if(param != null) {
out = new DataOutputStream(connection.getOutputStream());
out.writeBytes(param);
out.flush();
out.close();
}
reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
StringBuilder builder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}
String sessionText = connection.getHeaderField("Set-Cookie");
connection.disconnect();
CyzHttpResponse httpResponse = new CyzHttpResponse();
httpResponse.setResponseText(builder.toString());
httpResponse.setSession(sessionText);
return httpResponse;
}
catch (Exception e) {
System.out.println("HTTP POST發生異常" + e.getLocalizedMessage());
}
finally {
close(out);
close(reader);
}
return null;
}
public static void close(Closeable closeable) {
if (closeable == null) {
return;
}
try {
closeable.close();
}
catch (Exception e) {
System.out.println("發生異常" + e.getMessage());
e.printStackTrace();
}
}
}
包3：
package com.jeeplus.modules.zzybaseservice;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.google.gson.Gson;
import com.jeeplus.common.web.BaseController;
@Controller
@RequestMapping(value = "${adminPath}/zzy/zzybase")
public class ZzyBaseMesController extends BaseController {
@RequestMapping(value = "/zzyService")
@ResponseBody
public String zzyService(HttpServletRequest request,HttpServletResponse response) {
String ur=request.getParameter("url");
if (StringUtils.isNotBlank(ur)) {
CyzHttpResponse message = CyzHttpUtils.doHttpGetJson(ur, null, null);
String mes = message.getResponseText();
return renderString(response, mes);
}else{
return renderString(response, "path is error");
}
}
}
前臺請求介面拿過來在後臺處理跨域：（程式碼如下）
@RequestMapping(value = "applicationOrderDo")
@ResponseBody
public String applicationOrderDo(HttpServletRequest request,HttpServletResponse response,Page page) {
String url="http://smdt.canquick.com/hold/api/appointment.json";
String office_id=request.getParameter("office_id");
CyzHttpResponse message =CyzHttpUtils.doHttpGetJson(url+"?office_id="+office_id,null,null);//呼叫解決跨域問題（這裡是get請求方式）
String mes = message.getResponseText();
Map map = (Map)JSON.parse(mes);
String date=((Object)map.get("data")).toString();
List<Map<String,Object>> list=JsonToMap.FromJSONStringToList(date);
/*String total=(String)list.get(0).get("total");
page.setCount(Long.parseLong(total));
System.out.println(page.getCount()+"");
request.setAttribute("", total);*/
//JSONObject mess = JSONObject.parseObject(mes);
String json = JSON.toJSONString(list);
return json;
}