关于OkHttp怎么发送form表单数据

直接贴代码吧

工具类

public class OkHttpClientUtil {
    private static OkHttpClientUtil mInstance = new OkHttpClientUtil ();

    private OkHttpClientUtil(){}
    /**
     * 单例模式获取 NetUtils
     *
     * @return {@link OkHttpClientUtil}
     */
    public static OkHttpClientUtil getInstance() {
        return mInstance;
    }

    public String issueFromRequest(String url, FormBody body, Map<String, String> headerMap)
            throws IOException {

        Builder builder = new Builder().url(url).post(body);
        if (headerMap != null && !headerMap.isEmpty()) {
            for (String key : headerMap.keySet()) {
                builder.addHeader(key, headerMap.get(key));
            }
        }
        Request request = builder.build();
        Response response = okHttpClient.newCall(request).execute();
        if (response.isSuccessful()) {
            return response.body().string();
        } else {
            throw new IOException("Unexpected code " + response);
        }
    }
}

如果是发送普通的参数

FormBody.Builder builder = new FormBody.Builder();
String url = "localhost" + ":" + "port";
Map<String, String> map = Maps.newHashMap();
FormBody body = builder.add("paramsA", "aaa")
                .add("paramsB", "bbb")
                .add("paramsC", "ccc")
                .add("paramsD", "ddd")
                .build();
// 发送请求
String str = OkHttpClientUtil.getInstance().issueFromRequest(url, body, map);

如果发送的参数中带有集合类型的参数

FormBody.Builder builder = new FormBody.Builder();
String url = "localhost" + ":" + "port";
Map<String, String> map = Maps.newHashMap();

List<Object> paramsList = new ArrayList<>(); // 比如这个集合中就是参数的话
for (int i = 0; i < paramsList .size(); i++) {
            builder.add("paramsList [" + i +"].listA","aaa")
                    .add("paramsList [" + i +"].listB","bbb")
                    .add("paramsList [" + i +"].listC","ccc");
        }
FormBody body = builder.add("paramsA", "aaa")
                .add("paramsB", "bbb")
                .add("paramsC", "ccc")
                .add("paramsD", "ddd")
                .build();
// 发送请求
String str = OkHttpClientUtil.getInstance().issueFromRequest(url, body, map);

后台接收的对象

@Data
public class ReceiveObject{
    private String paramsA;

    private String paramsB;

    private String paramsC;

    private String paramsD;

    private List<ParamDetails> paramsList;

    @Data
    public static class ParamDetails{
        private String listA;
        private int listB;
        private String listC;
    }
}