Spring Boot (ii): Parsing JSON data using Fastjson

If we want to use a third-party JSON parsing framework in spring boot:

1) We need to introduce third-party package dependencies in the Pom.xml file;

2) Implementation method:

Method 1 requires inheriting the Webmvcconfigureradapter class in the startup class and overriding the Configuremessageconverters method of the class.

Method 2. We use @bean to inject third-party analytic frameworks directly.

1, the introduction of Fastjson-dependent library

<Dependency>    <groupId>Com.alibaba</groupId>    <Artifactid>Fastjson</Artifactid>    <version>1.2.15</version></Dependency>

After 1.2.10, there will be two methods to support Httpmessageconvert, one is Fastjsonhttpmessageconvert, support the following version of 4.2;

One is FASTJSONHTTPMESSAGECONVERT4, which supports more than 4.2 versions.

2, configuration Fastjson (support two methods)

(1) Method one:

<1> Start class inherits Webmvcconfigureradapter class;

<2> coverage Method configuremessageconverters;

The ① startup class code is as follows:

@SpringBootApplication Public classAppextendswebmvcconfigureradapter{ @Override  Public voidConfiguremessageconverters (listconverters) {        Super. Configuremessageconverters (converters); /** 1, the need to define a convert conversion message object, * 2, add Fastjson configuration information, such as: whether to format the returned JSON data; * 3, add configuration information in convert;         * 4. Add convert to converts; */        //1. A convert message object needs to be defined first;Fastjsonhttpmessageconverter Fastconverter =NewFastjsonhttpmessageconverter (); //2, add Fastjson configuration information, such as: whether to format the returned JSON data;Fastjsonconfig Fastjsonconfig =NewFastjsonconfig ();        Fastjsonconfig.setserializerfeatures (Serializerfeature.prettyformat); //3, add the configuration information in Convert;Fastconverter.setfastjsonconfig (fastjsonconfig); //4. Add convert to converts;Converters.add (Fastconverter); }     Public Static voidMain (string[] args) {/** The application that launches the App class in the Main method*/Springapplication.run (App.class, args); }}

The interface code for ②controller is as follows:

@RestController Public classhellocontroller{/*** returned JSON data *@return     */@RequestMapping ("/getdemo")     Public demo Getdemo () {Demo demo=NewDemo (); Demo.setid (1); Demo.setname ("Zhangsan"); Demo.setcreatetime (  New  Date ()); returndemo; }}

③ Test Code:

In the Createtime property in the Demo entity class, format the date type as "Yyyy-mm-dd HH:mm:ss" using @JSONField annotations, as follows:

 Public class demo{    privateint  ID;     Private String name;     // annotations using the package: Com.alibaba.fastjson.annotation.JSONField    @JSONField (format = "Yyyy-mm-dd HH:mm:ss")    private Date createtime;   Create Time     //getter and setter method omitted }

Open the http://localhost:8080/getDemo in the browser:

If the format of "Createtime" in the returned JSON data is: YYYY-MM-DD HH:MM:SS, the configured Fastjson processing data is used, otherwise the configured Fastjson of the configuration does not take effect.

(2) Method two:

<1> injecting bean:httpmessageconverters into the startup class

The code for the startup class is as follows:

@SpringBootApplication Public classapp{/*** Inject Fastjsonhttpmessageconverter with @Bean *@return     */@Bean Publichttpmessageconverters fastjsonhttpmessageconverters () {//1. A convert message object needs to be defined first;Fastjsonhttpmessageconverter Fastconverter =NewFastjsonhttpmessageconverter (); //2, add Fastjson configuration information, such as: whether to format the returned JSON data;Fastjsonconfig Fastjsonconfig =NewFastjsonconfig ();        Fastjsonconfig.setserializerfeatures (Serializerfeature.prettyformat); //3, add the configuration information in Convert;Fastconverter.setfastjsonconfig (fastjsonconfig); //4.httpmessageconverter<?> converter =Fastconverter; return Newhttpmessageconverters (Converter); }     Public Static voidMain (string[] args) {/** The application that launches the App class in the Main method*/Springapplication.run (App.class, args); }}

3. Some ways to use Fastjson

(1) Format the format of the date:

    @JSONField(format = "Yyyy-mm-dd HH:mm:ss")    private Date createtime;   creation Time

(2) If you do not want the interface to return an attribute, set the Serialize property of the @JSONField to false(not serialized);

    /*      * Do not want to return this property, serialize: Whether     to serialize */     @JSONFieldfalse)     Private String remarks; // Notes Information

Spring Boot (ii): Parsing JSON data using Fastjson