Okhttp3发送xml、json、文件的请求方法

1、引入依赖
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>3.3.1</version>
</dependency>
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2、加入工具类
package znxd.video.bank.base;

import okhttp3.*;

import java.io.File;

/**
* http请求工具类
*/
public class Okhttp3Utils {

/**
* xml格式post请求接口调用
* @param url 接口地址
* @param xmlStr xml格式请求参数体
* @return
*/
public static String postXml(String url,String xmlStr){
RequestBody body=RequestBody.create(MediaType.parse("application/xml"),xmlStr);
Request requestOk = new Request.Builder()
.url(url)
.post(body)
.build();

Response response;
try {
response = new OkHttpClient().newCall(requestOk).execute();
String jsonString = response.body().string();
if(response.isSuccessful()){
return jsonString;
}
} catch (Exception e) {
e.printStackTrace();
return e.getMessage();
}
return "";
}

/**
* get请求接口，返回json
* @param url 接口地址
* @return
*/
public static String getJson(String url){
// RequestBody body=RequestBody.create(MediaType.parse("application/json"),"");
Request requestOk = new Request.Builder()
.url(url)
.get()
.build();

Response response;
try {
response = new OkHttpClient().newCall(requestOk).execute();
String jsonString = response.body().string();
if(response.isSuccessful()){
return jsonString;
}
} catch (Exception e) {
e.printStackTrace();
return e.getMessage();
}
return "";
}

/**
* 发送文件
* @param url 请求接口地址
* @param uploadDir 参数上传目录
* @param baseFileUrl 文件保存基准路径
* @param relativeUrl 文件保存的相对路径
* @return 接口返回值
* 该方法前端以formData格式传入，包括文件和参数，可一起传入。
*/
public String uploadFilePost(String url,String uploadDir,String baseFileUrl,String relativeUrl){

File temporaryFile = new File(baseFileUrl+relativeUrl);
if(!temporaryFile.exists()){
return "";
}
RequestBody requestBody = new MultipartBody.Builder()
.addFormDataPart("uploadDir", uploadDir) //参数一，可注释掉
.addFormDataPart("fileUrl", relativeUrl) //参数二，可注释掉
.addFormDataPart("file", temporaryFile.getName(), RequestBody.create(MediaType.parse("application/octet-stream"),temporaryFile)) //文件一
.build();
Request requestOk = new Request.Builder()
.url(url)
.post(requestBody)
.build();

Response response;
try {
response = new OkHttpClient().newCall(requestOk).execute();
String jsonString = response.body().string();
// temporaryFile.delete();
if(response.isSuccessful()){
return jsonString;
}
} catch (Exception e) {
e.printStackTrace(http://www.my516.com);
}
return "";
}
}

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