okhttp请求Demo

利用okhttp，通过http协议请求。写下此笔记，记录常用的请求方法，如get，post请求方法，以及表单提交，文件上传，xml请求soap协议的webservice等等，具体详细用法参考http://www.tuicool.com/articles/3INNz2

package com.gosun.core.httpreq;

import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import com.gosun.core.json.JsonUtil;
import com.gosun.core.utils.DCCWSReqClient;
import com.squareup.okhttp.FormEncodingBuilder;
import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.MultipartBuilder;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;
import net.sf.json.JSONObject;

/**
 * http请求
 * @author liuxg
 * @date 2016年2月19日 上午11:27:01
 */
public class OkHttpReqDemo {

    public static void main(String[] args) {
        /*try {
            //new OkHttpReqDemo().get();
            //new OkHttpReqDemo().formPost();
            //new OkHttpReqDemo().xmlPost();
            //new OkHttpReqDemo().uploadFile();
            //new OkHttpReqDemo().fileUpload();
        } catch (IOException e) {
            e.printStackTrace();
        }*/

    }
    /**
     * get请求
     * @throws IOException
     */
    public void get() throws IOException {
        String url = "http://localhost:8080/gircs/metadata/batchImport/testGet?name=123&password=234";
        HttpReqUtil.get(url);
    }

    /**
     * post请求
     * @throws IOException
     */
    public void formPost() throws IOException {
        RequestBody body = new FormEncodingBuilder()
                .add("name", "name")
                .add("password", "password")
                .build();       HttpReqUtil.post("http://localhost:8080/gircs/metadata/batchImport/testFormPost", body);
    }

    /**
     * xml请求关键在于设置请求头部mediaType
     * @throws IOException
     */
    public void xmlPost() throws IOException{
        String url = "http://192.168.27.218:8085/dataSourceWebService?wsdl";
        JSONObject params = JsonUtil.getInstance().putData("node_id", 147).putData("page", 1).putData("limit", 5)
                .getJo();
        RequestBody body = RequestBody.create(MediaType.parse("text/xml;charset=UTF-8"), getSoapRequestData("getDbMetaDatas",params));
        Response  response = HttpReqUtil.post(url, body);
        System.out.println(response.body().string());
    }


    /**
     * 文件上传，模拟表单的提交
     * @throws IOException
     */
    public void fileUpload() throws IOException{
        //没有指定上次file的name是什么，后台直接在request的请求中获取输入流，转化成文件,不能用multipart接受
        RequestBody fileBody = RequestBody
                .create(MediaType.parse("image/png"), new File("E:\\color.png")); 
        RequestBody body = new MultipartBuilder()
                .type(MultipartBuilder.FORM)
                .addFormDataPart("name", "name")
                .addFormDataPart("password", "password")
                .addFormDataPart("file", "liuxg", fileBody)
                .build();       
        HttpReqUtil.post("http://localhost:8080/gircs/metadata/batchImport/testUploadFile", body);      
    }

    /**
     * 凑成xml格式字符串
     * @param methodName
     * @param params
     * @return
     */
    @SuppressWarnings("rawtypes")
    private String getSoapRequestData(String methodName, JSONObject params) {
        StringBuffer sb = new StringBuffer(
                "<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:web=\"http://webservice.datasource.gosun.com/\">");
        sb.append("<soapenv:Header/><soapenv:Body>");
        sb.append("<web:" + methodName + ">");
        Iterator it = params.keys();
        while (it.hasNext()) {
            String key = (String) it.next();
            String value = params.getString(key);
            sb.append("<" + key + ">" + value + "</" + key + ">");
        }
        sb.append("</web:" + methodName + ">");
        sb.append("</soapenv:Body></soapenv:Envelope>");
        return sb.toString();
    }


}

package com.gosun.core.httpreq;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import com.gosun.core.utils.Constants;
import com.gosun.service.entity.UserRsp;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;

/**
 * http请求工具类,注意理解http请求中header的作用
 * @author liuxg
 * @date 2016年2月19日 上午11:27:12
 */
public class HttpReqUtil {


    /**
     * get方式请求
     * @param url
     * @return 服务器返回值
     * @throws IOException
     */
    public static Response get(String url) throws IOException {
        Request request = new Request.Builder().url(url)
                .build();
        Response response = new OkHttpClient().newCall(request).execute();
        if (!response.isSuccessful())
            throw new IOException("请求有错：" + response);
        return response;
    }

    /**
     * post方式请求
     * 
     * @param url
     * @param params
     *            参数，已json方式传参
     * @return 服务器返回值
     * @throws IOException
     */
    public static Response post(String url, RequestBody body) throws IOException {
        Request request = new Request.Builder().url(url)
                .post(body).build();
        Response response = new OkHttpClient().newCall(request).execute();
        if (!response.isSuccessful())
            throw new IOException("请求有错：" + response);
        return response;

    }
}