Analog transmission request postman

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 Common status codes: a web server HTTP response status code is three digits

1. 200: 2 beginning have expressed a request is sent successfully. 200 indicates that the request is sent successfully, the server returns the
2. 302: 3 have said at the beginning of the redirect. 302 indicates a provisional response now requested resource request from a different URI. For example, open my blog link, when my blog has been deleted, automatically jump to the blog Home Park
3. 400: 400 indicates that the request sent by the client has a syntax error. 403 does not have access; 404 represents an access page does not exist
4. 500: 5 at the beginning of all means that the server is abnormal. Internal server 500 represents abnormality; 504 represents a server timeout does not return results

A transmitting ordinary get, post request, without parameters

Java code:

postman：

Two, URI resource identifier

Java code:

restful：

Third, the type of data transmission json: request parameter map set objects

Java code:

postman: Here we must note,

1, the requesting party mode

2, here to design headers, Body two options

headers：Content-Type-------application/json

Body: raw parameters in json format to and received backend parameter names have been otherwise get back less than

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2019.05.16 supplement

Use postman want to send an object, would like to send a parameter other than the object was thinking about the individual parameters on the address brought over, then test it as a method parameter method can also be put to use specific methods are as follows:

Java code parameters:

postman parameters:

Fourth, the request for a single parameter

Java：

postman：这里和多个参数的一样需要修改headers和Body，只是在Body中传递单个值即可

五、发送get请求，在URL中直接展示参数名称和数值，请求长度有限制

Java：

postman：这里参数和Java代码里的要一致否则获取不到

六、上传文件请求

Java：

postman:这里切记切记，headers中不能有任何配置，否则上传失败！

有关Content-Type属性值有如下编码类型：

1. multipart/form-data：既可以上传文件等二进制数据，也可以上传表单键值对，只是最后会转化为一条信息；
2. x-www-form-urlencoded：只能上传键值对，并且键值对都是间隔分开的。

常见的媒体格式类型如下：

1.     text/html ： HTML格式
2.     text/plain ：纯文本格式      
3.     text/xml ：  XML格式
4.     image/gif ：gif图片格式    
5.     image/jpeg ：jpg图片格式 
6.     image/png：png图片格式

   以application开头的媒体格式类型：

1.    application/xhtml+xml ：XHTML格式
2.    application/xml     ： XML数据格式
3.    application/atom+xml  ：Atom XML聚合格式    
4.    application/json    ： JSON数据格式
5.    application/pdf       ：pdf格式  
6.    application/msword  ： Word文档格式
7.    application/octet-stream ： 二进制流数据（如常见的文件下载）
8.    application/x-www-form-urlencoded ： <form encType=””>中默认的encType，form表单数据被编码为key/value格式发送到服务器（表单默认的提交数据的格式）

body has four options: form-data, x-www-form-urlencoded, raw, binary

a. form-data: either upload key-value pairs, you can also upload files. When the file is uploaded field, there will be explained Content-Type file type, you can upload multiple files.

bx-www-form-urlencoded: data in the form are converted to the key-value pairs, such as, name = java & age = 2, the key pair can only upload

c.raw: Text can be uploaded in any format, you can upload text, json, xml, html, etc.

d.binary: you can only upload binary data, typically used to upload the file, because there is no key, so only upload one file.