First Spring-boot Project

1. configuration file  application.yml
Spring
  Profiles
    Active:dev
  DataSource
      Driver-class-name:oracle.jdbc.driver.oracledriver
      Url:jdbc:oracle:thin: @localhost: 1521:xe
      Username:system
      password:123456
  Jpa:
    Hibernate:
      Ddl-auto:update
    Show-sql:true

1. Read the contents of the configuration file.

Server:  port:8081  context-path:/bootservice:  Name:freya
  version:1.1

(1) [Email protected] ("${service.name}")

private String name;

(2). Use Environment,env.getproperty ("Key Name")

@Autowired

    Private environment env;    @RequestMapping (value = "/hello") public    String Hello () {        return "Hello Spring boot!" + env.getproperty ("service . Name ");    }
(3) Customizing an entity class

@Component @configurationproperties (prefix = "project")  //config file prefix @propertysource (value = "classpath:config/ Config.properties ")//File location public class Myconfig {    private String version;    private String name;    Public String getversion () {        return version;    }    public void Setversion (String version) {        this.version = version;    }    Public String GetName () {        return name;    }    public void SetName (String name) {        this.name = name;    }}
Get it in the controller

Restcontrollerpublic class Hellocontroller {    @Autowired    private myconfig myconfig;    @RequestMapping (value = "/hello") public    String Hello () {        return "Hello Spring boot!" myconfig.getversion () + "" +  myconfig.getname ();    }}

2. Form submission

Controller layer
@PostMapping ("/save")
Public Girl Save (@Valid Girl Girl, Bindingresult bindingresult) {
    if (Bindingresult.haserrors ()) {
        System.out.print (Bindingresult.getfielderror (). Getdefaultmessage ());
        return null;
    }
    Girl.setage (Girl.getage ());
    Girl.setcupsize (Girl.getcupsize ());
    Girl.setmoney (Girl.getmoney ());
    Return Girlrepository.save (Girl);
}

Entity class

@Entity  //tables in the corresponding database
public class girl{

    @Id//Primary key
    @GeneratedValue self-increment, starting from 1
    Private Integer ID;

    @Min (value = 18,message = "underage")   //Minimum value of 18, does not satisfy the value of return message
    Private Integer age;
    Private String cupsize;

    @Min (value = 0,message = "Amount must be passed")
    Private Double money;

3. Custom exception (CodeEnum is enumerated type, easy to manage exception status code and return information)

public class Girlexception extends runtimeexception{
    Private String Respcode;

    
        Super (Codeenum.getmsg ());
        This.respcode = Codeenum.getcode ();
    }
    Public girlexception (String message,string code) {
        Super (message);
        This.respcode = code;
    }
    Public String Getrespcode () {
        return respcode;
    }

    public void Setrespcode (String respcode) {
        This.respcode = Respcode;
    }
}

Enum entity public enum CodeEnum {

  Error_code ("1", "System Exception"), 
 Ok_code ("0", "OK"), 
 Pre_school ("100", "You may still be in primary school bar"), 
 High_school ("101", "You may still be in high school");        
 
 CodeEnum (string code, String msg) {
 This.code = code; 
 this.msg = msg;    
} 
 Private String code; 
 Private String msg;    
 
 Public String GetCode () {
 return code; 
    
 
 Public String getmsg () {
 return msg; 
 } 
} 
/**  

  * catch Exception class (handle) 
 */
 @ControllerAdvice 
 public class Exceptionhandle {
 
 @Except Ionhandler 
 @ResponseBody 
 Public resultmap handle (Exception e) {
 if (e instanceof girlexception) {
 Girlexception girlexception = (girlexception) e; 
 Return Resultmap.error (Girlexception.getrespcode (), Girlexception.getmessage (), "");    
} 
 Return Resultmap.error (E.getmessage ()); 
 } 
} 
 
/** 
 * spring-boot ao 
 */
 @Aspect  

@Component
public class Httpaspect {

    Private static final Logger log = Loggerfactory.getlogger (Httpaspect.class);  The log package that comes with spring

    @Pointcut ("Execution (* com.girl.controller.girlcontroller.* (..))")
    public void log () {}

    @Before ("log ()")
    public void Log1 () {
        GET request Requests
        Requestattributes RA = requestcontextholder.getrequestattributes ();
        Servletrequestattributes SRA = (servletrequestattributes) RA;
        HttpServletRequest request = Sra.getrequest ();
        Log.info ("id={}", Request.getremoteaddr ());  The log information is output in {}

    }
}

Multi-Module deployment:
https://www.imooc.com/video/16354

First Spring-boot Project