Post Json例子

这里我们选择postman自带的post地址,您打开postman后点击Collections,里面有很多请求的例子。

Postman请求

具体请查看图片,地址,请求头,请求参数均填写正确。
这里写图片描述

Python请求

和上一节一样,用的requests库。

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# coding:utf-8

import json
import requests

def post_json():
url = "https://postman-echo.com/post"
body = {
"myName": "amos",
"age": "17"
}

response = requests.post(url=url,
headers={"content-type": "application/json"},
data=json.dumps(body),
)
print(response.content)

if __name__ == "__main__":
post_json()

返回内容如下: (是否和postman一样呢?)

b’{“args”:{},”data”:{“myName”:”amos”,”age”:”17”},”files”:{},”form”:{},”headers”:{“host”:”postman-echo.com”,”content-length”:”31”,”accept”:”/“,”accept-encoding”:”gzip, deflate”,”content-type”:”application/json”,”user-agent”:”python-requests/2.18.4”,”x-forwarded-port”:”443”,”x-forwarded-proto”:”https”},”json”:{“myName”:”amos”,”age”:”17”},”url”:”https://postman-echo.com/post"}'

有点不一样,注意到前面的”b”了吗?返回的内容是bytes类型。想要str类型很简单,bytes转str。print(response.content) - > 改为 print(response.content.decode())即可。

JAVA请求

先加入maven依赖

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<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.4</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.4</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>fluent-hc</artifactId>
<version>4.5.4</version>
</dependency>

java代码

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import org.apache.http.HttpEntity;
import org.apache.http.client.fluent.Response;
import org.apache.http.client.fluent.Request;
import org.apache.http.entity.StringEntity;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.http.MediaType;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;


public class RequestClient {

private final static String JSON = MediaType.APPLICATION_JSON_UTF8_VALUE;

public String postJson(String url, String body) throws IOException {

HttpEntity httpEntity = new StringEntity(body);

Response response = Request.Post(url)
.addHeader("Content-Type", JSON)
.body(httpEntity)
.execute();

return response.returnContent().asString();

}
public static void main(String[] args) throws IOException {
RequestClient client = new RequestClient();
String url = "https://postman-echo.com/post";
Map<String, String> map = new HashMap<String, String>();
map.put("myName", "amos");
map.put("age", "17");
// 将map转为json
ObjectMapper mapper = new ObjectMapper();
String body = mapper.writeValueAsString(map);

System.out.println(client.postJson(url, body));
}
}

运行main方法之后打印返回内容如下:

{“args”:{},”data”:{“myName”:”amos”,”age”:”17”},”files”:{},”form”:{},”headers”:{“host”:”postman-echo.com”,”content-length”:”28”,”accept-encoding”:”gzip,deflate”,”content-type”:”application/json;charset=UTF-8”,”user-agent”:”Apache-HttpClient/4.5.4 (Java/9.0.1)”,”x-forwarded-port”:”443”,”x-forwarded-proto”:”https”},”json”:{“myName”:”amos”,”age”:”17”},”url”:”https://postman-echo.com/post"}