Spring Boot web Development

Source: Internet
Author: User

    • JSON interface Development

In the previous spring development, we needed to provide the following configuration when we provided the JSON interface:

1 adding jar packages such as Jackjson

2 Configuring the Spring Controller scan

3 Docking method Add @responsebody

If you use spring boot, you only need the class to add @RestController , and the methods in the default class are returned in JSON format.

Example 1:

/*** @RestController = @Controller + @ResponseBody. So, when you define a Controller later, you can use @controller directly, if you need to return JSON can be added directly in the method @responsebody *@author1 **/@RestController Public classHellocontroller {@RequestMapping ("/hello")     PublicHashmap<string, string>Hello () {HashMap<string, string> map =NewHashmap<string, string>(); Map.put ("W", "1"); Map.put ("Wq", "12"); Map.put ("Wq1", "123"); Map.put ("Wq12", "123"); returnmap; //return "Hello";    }}

The results of the operation are as follows:

Example 2:

 PackageCom.cfj.testboot.controller;Importorg.springframework.web.bind.annotation.RequestMapping;ImportOrg.springframework.web.bind.annotation.RestController;Importcom.cfj.testboot.domain.UserDo; @RestController Public classTestreturnjson {@RequestMapping ("/returnjson")     PublicUserdo Testreturnjson () {Userdo u=NewUserdo (); U.setid (1); U.settname ("Testers"); returnu; }}

The results of the operation are as follows:

@RestController annotations, equivalent to @[email protected] Two annotations, the return JSON data does not need to be preceded by the method @responsebody annotations, but using @restcontroller this annotation, Cannot return jsp,html page, view parser cannot parse jsp,html page

Requestmapping is an annotation that handles request address mappings and can be used on classes or methods. On a class, the method that represents all response requests in a class is the parent path of the address.

The following code accesses the path: Http://localhost:8081/test/returnjson

 PackageCom.cfj.testboot.controller;Importorg.springframework.web.bind.annotation.RequestMapping;ImportOrg.springframework.web.bind.annotation.RestController;ImportCom.cfj.testboot.domain.UserDo, @RestController @requestmapping ("/test") Public classTestreturnjson {@RequestMapping ("/returnjson")     PublicUserdo Testreturnjson () {Userdo u=NewUserdo (); U.setid (1); U.settname ("Testers"); returnu; }}

Spring Boot web Development

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