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Control Statements
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Groovy File Handling
- Groovy - File I/O
- Java - Create a File
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- Java - Renaming Files/Directories
Groovy Error & Exceptions
- Groovy - Exception Handling
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Groovy Multithreading
- groovy - Multithreading
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Groovy Synchronization
- groovy - Synchronization
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- Groovy - Methods
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- Groovy - XML
- Groovy - XML
- Groovy - Parsing XML
- Groovy - Creating XML
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- Groovy - Simplified Notation
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- Groovy - JSON
- Groovy - JSON
- Groovy - Parsing JSON
- Groovy - Creating JSON using JsonOutput
- Groovy - Creating JSON using JsonBuilder
- Groovy - Modifying JSON
- Groovy - Error Handling
- Groovy - Handling JSON Arrays
- Groovy - JSON Array Operations
- Groovy - JSON Objects
- Groovy - JSON Object Operations
- Groovy - Generics
- Groovy - Generics
- Groovy - Declaring Generic Types
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- Groovy - Builders
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- Groovy Useful Resources
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Groovy - Creating JSON using JsonBuilder
Groovy provides JsonBuilder class which provides a fine-grained control over JSON structure. JsonBuilder provides a declarative and closure based approach to build the JSON. It resembles MarkupBuilder for XML generation.
Creating JSON Using JsonBuilder
Example.groovy
import groovy.json.JsonBuilder def builder = new JsonBuilder() builder { employee { name 'Alice' age 28 city 'Seattle' address { street '789 Pine Ln' zip '10115' } dept 'Admin' } } def json = builder.toPrettyString() println json
Output
When we run the above program, we will get the following result.
{ "employee": { "name": "Alice", "age": 28, "city": "Seattle", "address": { "street": "789 Pine Ln", "zip": "10115" }, "dept": "Admin" } }
Creating JSON Array using Builder
Example.groovy
import groovy.json.JsonBuilder def builder = new JsonBuilder() builder([ [ name: 'Julie', age: 32, id: 1 ], [ name: 'Henry', age: 27, id: 2 ] ]) println builder.toPrettyString()
Output
When we run the above program, we will get the following result.
[ { "name": "Julie", "age": 32, "id": 1 }, { "name": "Henry", "age": 27, "id": 2 } ]
Using Groovy Variables and Expresssions within JsonBuilder
Example.groovy
import groovy.json.JsonBuilder def itemName = "Laptop" def itemPrice = 99.99 def builder = new JsonBuilder() builder.item { name itemName price itemPrice discount itemPrice * 0.2 finalPrice itemPrice * 0.8 } println builder.toPrettyString()
Output
When we run the above program, we will get the following result.
{ "item": { "name": "Laptop", "price": 99.99, "discount": 19.998, "finalPrice": 79.992 } }
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