package com.example.demo;
public class Echo {
  private final long id;
  private final String content;
  public Echo(long id, String content) {
    this.id = id;
    this.content = content;
  }
  public long getId() {
    return this.id;
  }
  public String getContent() {
    return this.content;
  }
}

package com.example.demo;
import java.util.concurrent.atomic.AtomicLong;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.ModelAttribute;
@RestController
@RequestMapping("/echo")
public class EchoController {
  private static final String echoTemplate1 = "received %s!";
  private static final String echoTemplate2 = "%s speak to %s \'%s\'";
  private final AtomicLong counter = new AtomicLong();
  @RequestMapping(value="/getter/pattern1", method=RequestMethod.GET)
  public Echo getterPattern1(String content) {
    return new Echo(counter.incrementAndGet(), String.format(echoTemplate1, content));
  }
  @RequestMapping(value="/getter/pattern2", method=RequestMethod.GET)
  public Echo getterPattern2(@RequestParam(value="content", required=false) String alias) {
    return new Echo(counter.incrementAndGet(), String.format(echoTemplate1, alias));
  }
}

{"id":6,"content":"received hello!"} 

  @RequestMapping(value="/getter/pattern3/{content}", method=RequestMethod.GET)
  public Echo getterPattern3(@PathVariable String content) {
    return new Echo(counter.incrementAndGet(), String.format(echoTemplate1, content));
  }

{"id":8,"content":"received 123456!"}

package com.example.demo;
public class Message {
  private String from;
  private String to;
  private String content;
  public Message() {}
  public String getFrom() {
    return this.from;
  }
  public String getTo() {
    return this.to;
  }
  public String getContent() {
    return this.content;
  }
  public void setFrom(String value) {
    this.from = value;
  }
  public void setTo(String value) {
    this.to = value;
  }
  public void setContent(String value) {
    this.content = value;
  }
}

  @RequestMapping(value="/setter/message1", method=RequestMethod.POST)
  public Echo setterMessage1(@RequestBody Message message) {
    return new Echo(counter.incrementAndGet(), String.format(echoTemplate2, message.getFrom(), message.getTo(), message.getContent()));
  }

curl -i -H "Content-Type:application/json" -d "{\"from\":\"Tom\",\"to\":\"Sandy\",\"content\":\"hello buddy\"}" http://localhost:8080/echo/setter/message1

{"id":9,"content":"Tom speak to Sandy 'hello buddy'"}

  @RequestMapping(value="/setter/message2", method=RequestMethod.POST)
  public Echo setterMessage2(@ModelAttribute Message message) {
    return new Echo(counter.incrementAndGet(), String.format(echoTemplate2, message.getFrom(), message.getTo(), message.getContent()));
  }

curl -i -H "Content-Type:application/x-www-form-urlencoded" -d "from=sandy&to=aissen&content=go to" http://localhost:8080/echo/setter/message2

{"id":11,"content":"sandy speak to aissen 'go to'"}