| SNO. | Sun Specification | Sun Implementation | Apache | JDK |
|---|---|---|---|---|
| 1 | JAX-RPC | JWSDP | Apache SOAP Apache Axis1(1.4) XFire | JDK 1.4+ |
| 2 | JAX-WS | METRO | Apache Axis2(1.4) Apache CXF | JDK 1.5+ |
| 3 | JAX-RS | JERSY | Apache Axis2(1.4) Apache CXF | JDK 1.5+ |
Webservices can be developed in two approaches:
1)TOP-BOTTOM Approach(Contract-First Services)
i.e WSDL -> Classes
2)BOTTOM-TOP Approach (Code-First Services)
i.e Classes -> WSDL
**Contract-First services are always better than Code-First Services
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