随手看的一本书《java微服务》，测试成功了其中的第一个样例-白红宇

静态语言，JAVA应该多了解，结合微服务，DOCKER,再搞搞SPRING CLOUD，就能跟上时代了。

对了，链一个买书的地址：

https://item.jd.com/12089180.html

（我有时就不了解，一个程序员的收入，买一些书就那么小心呢？呵呵，收入都作什么去了？？：））

pom.xml


     
         
      
       4.0.0
          
      
       com.packtpub.mmj.restsample
          
      
       restsample
          
      
       0.0.1-SNAPSHOT
          
      
       jar
          
      
       restsample
          
      
       com.packtpub.mmj.restsample
          
              
       
        org.springframework.boot
               
       
        spring-boot-starter-parent
               
       
        1.5.2.RELEASE
               
        
           
          
              
       
        UTF-8
               
       
        UTF-8
               
       
        1.8
           
          
              
                   
        
         org.springframework.boot
                    
        
         spring-boot-starter-web
                    
                    
                         
          
           org.springframework.boot
                          
          
           spring-boot-starter-tomcat
                      
                     
                
               
                   
        
         org.springframework.boot
                    
        
         spring-boot-starter-jetty
                
               
                   
        
         org.springframework.boot
                    
        
         spring-boot-starter-test
                    
        
         test
                
           
          
              
                   
                        
         
          org.springframework.boot
                         
         
          spring-boot-maven-plugin

Calculation.java

package com.packtpub.mmj.restsample.model;import java.util.List;public class Calculation {    String funciton;    private List
     
       input;    private List
      
        output;        public Calculation(List
       
         input, List
        
          output, String function) {        this.funciton = function;        this.input = input;        this.output = output;    }    public String getFunciton() {        return funciton;    }    public void setFunciton(String funciton) {        this.funciton = funciton;    }    public List
         
           getInput() {        return input;    }    public void setInput(List
          
            input) { this.input = input; } public List
           
             getOutput() { return output; } public void setOutput(List
            
              output) { this.output = output; } }

CalculationController.java

package com.packtpub.mmj.restsample.resources;import com.packtpub.mmj.restsample.model.Calculation;import java.util.ArrayList;import java.util.List;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import static org.springframework.web.bind.annotation.RequestMethod.GET;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;@RestController@RequestMapping("/calculation")public class CalculationController {    private static final String PATTERN = "^-?+\\d+\\.?+\\d*$";        @RequestMapping("/power")    public Calculation pow(@RequestParam(value="base") String b, @RequestParam(value="exponent") String e) {        List
     
       input = new ArrayList
      
       ();        input.add(b);        input.add(e);        List
       
         output = new ArrayList
        
         ();        String powValue = "";        if (b!=null && e!=null && b.matches(PATTERN) && e.matches(PATTERN)) {            powValue = String.valueOf(Math.pow(Double.valueOf(b), Double.valueOf(e)));        } else {            powValue = "input is error";        }        output.add(powValue);        return new Calculation(input, output, "power");    }        @RequestMapping(value="/sqrt/{value:.+}", method=GET)    public Calculation sqrt(@PathVariable(value="value") String aValue) {        List
         
           input = new ArrayList
          
           (); input.add(aValue); List
           
             output = new ArrayList
            
             (); String sqrtValue = ""; if (aValue!=null && aValue.matches(PATTERN) ) { sqrtValue = String.valueOf(Math.sqrt(Double.valueOf(aValue))); } else { sqrtValue = "input is error"; } output.add(sqrtValue); return new Calculation(input, output, "sqrt"); }}

RestsampleApplication.java

package com.packtpub.mmj.restsample;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class RestsampleApplication {    public static void main(String[] args) {        SpringApplication.run(RestsampleApplication.class, args);    }}

输出：