OkHttp的使用之{RequestBody、FormBody，在一家公司干多长时间跳槽才合适

1、POST请求

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主要来讲一下post请求，post方式中的Request需要传递一个RequestBody作为post的参数。RequestBody有两个子类：FormBody和MultipartBody

1.1、RequestBody–json数据提交

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public static final MediaType JSON = MediaType.parse(“application/json; charset=utf-8”);

OkHttpClient client = new OkHttpClient();

String post(String url, String json) throws IOException {

RequestBody body = RequestBody.create(JSON, json);

Request request = new Request.Builder()

.url(url)

.post(body)

.build();

//同步

Response response = client.newCall(request).execute();

f (response.isSuccessful()) {

return response.body().string();

} else {

throw new IOException("Unexpected code " + response);

}

}

1.2、FromB

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ody—表单提交 这种能满足大部分的需求

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romBody用于提交表单键值对,key-value,其作用类似于HTML中的标记。比如username=“LHX”,age="21"等类似的键值对。

我们可以使用HashMap<String，String>这样的数据结构来存储接口所需参数的键值对，它的查找速度为O(1),很快，但是对于API接口参数来说，数据不会太多，查找快体现不出优势来，并且HashMap比较耗费内存。以下是使用hashmap的例子：

private void fetchDataByPost() {

//把参数传进Map中

HashMap<String,String> paramsMap=new HashMap<>();

paramsMap.put(“name”,“哈哈”);

paramsMap.put(“client”,“Android”);

paramsMap.put(“id”,“3243598”);

FormBody.Builder builder = new FormBody.Builder();

for (String key : paramsMap.keySet()) {

//追加表单信息

builder.add(key, paramsMap.get(key));

}

OkHttpClient okHttpClient=new OkHttpClient();

RequestBody formBody=builder.build();

Request request=new Request.Builder().url(netUrl).post(formBody).build();

Call call=okHttpClient.newCall(request);

call.enqueue(new Callback() {

@Override

public void onFailure(Call call, IOException e) {

//请求失败的处理

}

@Override

public void onResponse(Call call, Response response) throws IOException {

}

});

}

所以我们还有一种方式可以装取键值对，通过ArrayList这样的数据结构。

//首先要有一个RequestParameter类

public class RequestParameter implements Serializable {

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getValue() {

return value;

}

public void setValue(String value) {

this.value = value;

}

private String name;

private String value;

public RequestParameter(String name,String value){

this.name=name;

this.value=value;

}

}

List parameter=new ArrayList<>();

RequestParameter rp1=new RequestParameter(“name”,“哈哈”);

parameter.add(rp1);

RequestParameter rp2=new RequestParameter(“client”,“Android”);

parameter.add(rp2);

//创建一个FormBody.Builder

FormBody.Builder builder=new FormBody.Builder();

if (parameter!=null&&parameter.size()>0){

for (final RequestParameter p : parameter) {

builder.add(p.getName(),p.getValue());

}

}

RequestBody formBody=builder.build();

OkHttpClient okHttpClient=new OkHttpClient();

Request request=new Request.Builder().url(netUrl).post(formBody).build();

Call call=okHttpClient.newCall(request);

call.enqueue(new Callback() {

@Override

public void onFailure(Call call, IOException e) {

//请求失败的处理

}

@Override

public void onResponse(Call call, Response response) throws IOException {

}

});

1.3、MultipartBody—文件上传

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MultipartBody可以构建与HTML文件上传格式兼容的复杂请求体。

File file=new File(Environment.getExternalStorageDirectory(), “balabala.png”);

MediaType MEDIA_TYPE_PNG = MediaType.parse(“image/png”);

RequestBody filebody = MultipartBody.create(MEDIA_TYPE_PNG, file);

标签：String,value,RequestBody,FormBody,OkHttp,new,public,name
来源： https://blog.csdn.net/m0_65512713/article/details/122195247