4.0.0

    com.example
    spring-boot-ajax-example
    jar
    1.0

    
        org.springframework.boot
        spring-boot-starter-parent
        1.5.1.RELEASE
    

    
        1.8
    

    

        
            org.springframework.boot
            spring-boot-starter-thymeleaf
        

        
            org.springframework.boot
            spring-boot-devtools
            true
        

        
            org.webjars
            jquery
            2.2.4
        

        
            org.webjars
            bootstrap
            3.3.7
        

    

    
        
            
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

package com.example.controller;

import com.example.model.AjaxResponseBody;
import com.example.model.SearchCriteria;
import com.example.model.User;
import com.example.services.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import javax.validation.Valid;
import java.util.List;
import java.util.stream.Collectors;

@RestController
public class SearchController {

    UserService userService;

    @Autowired
    public void setUserService(UserService userService) {
        this.userService = userService;
    }

    @PostMapping("/api/search")
    public ResponseEntity getSearchResultViaAjax(
            @Valid @RequestBody SearchCriteria search, Errors errors) {

        AjaxResponseBody result = new AjaxResponseBody();

        //If error, just return a 400 bad request, along with the error message
        if (errors.hasErrors()) {

            result.setMsg(errors.getAllErrors()
                        .stream().map(x -> x.getDefaultMessage())
                        .collect(Collectors.joining(",")));

            return ResponseEntity.badRequest().body(result);

        }

        List users = userService.findByUserNameOrEmail(search.getUsername());
        if (users.isEmpty()) {
            result.setMsg("no user found!");
        } else {
            result.setMsg("success");
        }
        result.setResult(users);

        return ResponseEntity.ok(result);

    }

}

package com.example.model;

import java.util.List;

public class AjaxResponseBody {

    String msg;
    List result;

    //getters and setters

}

package com.example.model;

public class User {

    String username;
    String password;
    String email;

    public User(String username, String password, String email) {
        this.username = username;
        this.password = password;
        this.email = email;
    }

    //getters and setters
}

package com.example.model;

import org.hibernate.validator.constraints.NotBlank;

public class SearchCriteria {

    @NotBlank(message = "username can't empty!")
    String username;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }
}

package com.example.services;

import com.example.model.User;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class UserService {

    private List users;

    // Love Java 8
    public List findByUserNameOrEmail(String username) {

        List result = users.stream()
            .filter(x -> x.getUsername().equalsIgnoreCase(username))
            .collect(Collectors.toList());

        return result;

    }

    // Init some users for testing
    @PostConstruct
    private void iniDataForTesting() {

        users = new ArrayList();

        User user1 = new User("example", "password111", "[email protected]");
        User user2 = new User("yflow", "password222", "[email protected]");
        User user3 = new User("laplap", "password333", "[email protected]");

        users.add(user1);
        users.add(user2);
        users.add(user3);

    }

}

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringBootWebApplication {

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

}

    
    

    







    

        
Spring Boot AJAX Example

        


        

            

                Username
                

                    
                
            

            

                

                    Search
                    
                
            
        

    




    

$(document).ready(function () {

    $("#search-form").submit(function (event) {

        //stop submit the form, we will post it manually.
        event.preventDefault();

        fire_ajax_submit();

    });

});

function fire_ajax_submit() {

    var search = {}
    search["username"] = $("#username").val();

    $("#btn-search").prop("disabled", true);

    $.ajax({
        type: "POST",
        contentType: "application/json",
        url: "/api/search",
        data: JSON.stringify(search),
        dataType: 'json',
        cache: false,
        timeout: 600000,
        success: function (data) {

            var json = "
Ajax Response
"
                + JSON.stringify(data, null, 4) + "
";
            $('#feedback').html(json);

            console.log("SUCCESS : ", data);
            $("#btn-search").prop("disabled", false);

        },
        error: function (e) {

            var json = "
Ajax Response
"
                + e.responseText + "
";
            $('#feedback').html(json);

            console.log("ERROR : ", e);
            $("#btn-search").prop("disabled", false);

        }
    });

}

$ mvn spring-boot:run

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.5.1.RELEASE)

2017-02-03 14:56:36 DEBUG com.example.SpringBootWebApplication - Running with Spring Boot v1.5.1.RELEASE, Spring v4.3.6.RELEASE
2017-02-03 14:56:36 INFO  com.example.SpringBootWebApplication - No active profile set, falling back to default profiles: default
2017-02-03 14:56:39 INFO  com.example.SpringBootWebApplication - Started SpringBootWebApplication in 2.828 seconds (JVM running for 3.295)