问如何修复Spring-boot中的“白标错误页”

EN

ArrestGetByConApplication.java : 

package com.arrestbycon.arrestGetByCon;
import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
@ComponentScan
public class ArrestGetByConApplication {

public static void main(String[] args) {
    SpringApplication.run(ArrestGetByConApplication.class, args);
}

}

and some of my controller :

package com.arrestbycont.arrestGetByCon;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import java.sql.*;
import java.util.ArrayList;
import com.arrestbycon.arrestGetByCon.Result;

@RestController
public class GetByCon {

    @RequestMapping(value = "/test", method = RequestMethod.GET)   
    public ArrayList<Result> getResult() {
      Integer arr_id;
      Integer off_id;
      String arr_code;
      String off_code;
      String off_name;

      ArrayList<Object> myArrlist = new ArrayList<Object>();