Springboot return JSON string (Jackson and fast JSON)

First, Jackson

1. Controller class plus annotations @restcontroller

This annotation is equivalent to @controller this annotation plus @ResponseBody

2. Springboot uses Jackson to convert Java objects to JSON strings by default.

Second, fast JSON

1. pom file joins fast JSON dependency

    <dependency>        <groupId>com.alibaba</groupId>        <artifactid>fastjson</ artifactid>        <version>1.2.  </version>    </dependency>

2. Inject a @bean into the app launcher class

@Bean Publichttpmessageconverters fastjsonhttpmessageconverters () {//1, need to first define a converter converterFastjsonhttpmessageconverter Fastconverter =NewFastjsonhttpmessageconverter (); //2, add Fastjson configuration information, such as: whether to format the returned JSON dataFastjsonconfig Fastjsonconfig =NewFastjsonconfig ();        Fastjsonconfig.setserializerfeatures (Serializerfeature.prettyformat); //3. Add configuration information in convertFastconverter.setfastjsonconfig (fastjsonconfig); //4. Add Convert to Convertershttpmessageconverter<?> converter =Fastconverter; return Newhttpmessageconverters (Converter); }

3. Testing

Use Fastjson-specific annotations to test;

Annotate an attribute on a date type in an entity class @JSONField (format= "Yyyy/mm/dd hh:mm")

Returns the data to see if the date has been returned in the format above. Ok!

4. Annotations added on the controller class also use @restcontroller

Springboot return JSON string (Jackson and fast JSON)