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This guide walks you through the process of creating a "hello world" RESTful web service with Spring.
You’ll build a service that will accept HTTP GET requests at:
http://localhost:8080/
and respond with a JSON representation of a greeting:
Hello World!You can call URL’s of employee service like below. Which will return all employees.
GET http://localhost:8080/rest/emp/
The response:
[
{
"id": 1,
"name": "Sachin Tendulkar",
"designation": "Batsman",
"salary": 100000
},
{
"id": 2,
"name": "Mahendra Singh Dhoni",
"designation": "Batsman / W & C",
"salary": 80000
},
{
"id": 3,
"name": "Virat Kohli",
"designation": "Vice Captain",
"salary": 70000
},
{
"id": 4,
"name": "Yuvraj Singh",
"designation": "Batsman",
"salary": 60000
},
{
"id": 5,
"name": "R Ashwin",
"designation": "Offbreak bowler",
"salary": 60000
},
{
"id": 6,
"name": "Virendra Sehwagh",
"designation": "Batsman",
"salary": 50000
},
{
"id": 7,
"name": "Ajay Kumar (Jadeja)",
"designation": "Batsman",
"salary": 60000
},
{
"id": 8,
"name": "Anjikya Rahane",
"designation": "Batsman",
"salary": 50000
},
{
"id": 9,
"name": "Bhuvaneshwar Kumar",
"designation": "Medium Fast Bowler",
"salary": 50000
},
{
"id": 10,
"name": "Mohammed Shami",
"designation": "Medium Fast Bowler",
"salary": 40000
},
{
"id": 11,
"name": "Hardik Pandya",
"designation": "Medium Fast Bowler",
"salary": 30000
}
]You can get a resource with its Id as below.
GET http://localhost:8080/rest/emp/1
The response:
{
"id": 1,
"name": "Sachin Tendulkar",
"designation": "Batsman",
"salary": 100000
}Similary you can delete a resource with HTTP DELETE method, for deleting you need an Id of the resource.
DELETE http://localhost:8080/rest/emp/1
The response will be the id of the deleted resource:
1If you want add a resource you should use HTTP PUT method as below. You should not send id in the URL and you should supply the data/object in the json format as below
PUT http://localhost:8080/rest/emp/
{
"id": 1,
"name": "Sachin Tendulkar",
"designation": "Batsman",
"salary": 100000
}The response will be the id of the created resource:
1If you want update a resource you should use HTTP POST method as below. You should send id in the URL and you should supply the data/object in the json format as below
POST http://localhost:8080/rest/emp/4
{
"id": 4,
"name": "Sachin Tendulkar",
"designation": "Batsman",
"salary": 100000
}The response will be the created resource:
{
"id": 4,
"name": "Sachin Tendulkar",
"designation": "Batsman",
"salary": 100000
}Congratulations! You’ve just developed a RESTful web service with Spring.