[groovy] JSON serialization (jsonbuilder builder | generates JSON string with root node name | generates JSON string without root node name)

One 、json generator

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First , establish json generator .

// json  generator def jsonBuilder = new JsonBuilder()

then , If you generate a with the root node name json character string , Need to use jsonBuilder. Root node name = { Closure } Format code , Generate json character string ;

//  Generate  {"student":{"name":"Tom","age":18}}//  among  .student  Represents the name of the root node  ,  This is not a method name jsonBuilder.student{ 
        name "Tom"    age 18}

Generated by the above code json String is

{ 
    "student":{ 
    "name":"Tom","age":18}}

Last , If you want to generate

{ 
    "name":"Tom","age":18}

Style string , Then use

//  Generate  {"name":"Tom","age":18}jsonBuilder{ 
        name "Tom"    age 18}

The code can be , Get rid of . Root node name , Use it directly jsonBuilder{ Closure } Generate json character string ;

Two 、 Code example

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json Generator code example ：

import groovy.json.JsonBuilder// json  generator def jsonBuilder = new JsonBuilder()//  Generate  {"student":{"name":"Tom","age":18}}//  among  .student  Represents the name of the root node  ,  This is not a method name jsonBuilder.student{ 
        name "Tom"    age 18}println jsonBuilder//  Generate  {"name":"Tom","age":18}jsonBuilder{ 
        name "Tom"    age 18}println jsonBuilder

Execution results ：

{ 
    "student":{ 
    "name":"Tom","age":18}}{ 
    "name":"Tom","age":18}