java请求第三方接口遇到的跨域问题

来源：互联网发布：免费视频编辑软件排行编辑：程序博客网时间：2024/05/17 08:09

自己项目中遇到的请求第三方接口跨域的问题：

首先项目中引入解决跨域的三个公共包；

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锟斤拷式锟斤拷锟斤拷
}
else {
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8"); //锟斤拷�?�锟斤拷式锟斤拷锟斤�?
}
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发生异常" + 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锟斤拷式锟斤拷锟斤拷
}
else {
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8"); //锟斤拷�?�锟斤拷式锟斤拷锟斤�?
}
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发生异常" + 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("发生异常" + 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");
}
}
}

前台请求接口拿过来在后台处理跨域：（代码如下）

@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);//调用解决跨域问题（这里是get请求方式）
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;

}

阅读全文

0 0