Ajax trong Spring MVC

#1

Hiện mình đang làm Ajax trong Spring MVC, khhi controller trả về String thì không có vấn đề gì hết, tuy nhiên nếu trả ra 1 list đối tượng là báo lỗi 406 Not Acceptable. Mình đã tìm hiểu qua Stack overflow nhưng cũng chưa có giải phải nào để xử lý cái này:

Entitiy:

public class Hocsinh {
	
	private int mahs;
	private String ten;
	private int tuoi;
	public int getMahs() {
		return mahs;
	}
	public void setMahs(int mahs) {
		this.mahs = mahs;
	}
	public String getTen() {
		return ten;
	}
	public void setTen(String ten) {
		this.ten = ten;
	}
	public int getTuoi() {
		return tuoi;
	}
	public void setTuoi(int tuoi) {
		this.tuoi = tuoi;
	}
	public Hocsinh(int mahs, String ten, int tuoi) {
		super();
		this.mahs = mahs;
		this.ten = ten;
		this.tuoi = tuoi;
	}
	public Hocsinh() {
		super();
		// TODO Auto-generated constructor stub
	}
}

Controller:

@Controller
public class AjaxController {

	@RequestMapping(value = "/index", method = RequestMethod.GET)
	public String home(){
		return "index";
	}
	
	@RequestMapping(value = "/hello", method = RequestMethod.GET)
	@ResponseBody
	public String hello(){
		return "Hello Ajax";
	}
	
	@RequestMapping(value = "/helloname/{name}", method = RequestMethod.GET)
	@ResponseBody
	public String helloname(@PathVariable String name){
		return "Hello "  + name;
	}
	
	@RequestMapping(value = "/dshs", method = RequestMethod.GET)
	@ResponseBody
	public List<Hocsinh> getds(){
		HocsinhModel hsm = new HocsinhModel();
		return hsm.findAll();
	}

}

Ajax:

$('#btn3').click(function() {
	$.ajax({
		type: "GET",
		headers: { 
	        Accept : "application/json; charset=utf-8",
	        "Content-Type": "application/json; charset=utf-8"
	    },
	    url: '${pageContext.request.contextPath}/dshs.html',
	    success: function(result){
		   $('#result2').html("Xong")
		}, 
		error:function(data,status,er) { 
	        alert("error: "+data.tenhang+" status: "+status+" er:"+er);
	    }
	});
});

pom.xml

   <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>javax.servlet-api</artifactId>
       <version>3.1.0</version>
   </dependency>

   <dependency>	
            <groupId>org.springframework</groupId>
	<artifactId>spring-core</artifactId>
	<version>4.2.6.RELEASE</version>
</dependency>	

    <dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-web</artifactId>
	<version>4.2.6.RELEASE</version>
</dependency>

<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-webmvc</artifactId>
	<version>4.2.6.RELEASE</version>
</dependency>
<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-api</artifactId>
	<version>1.7.5</version>
</dependency>
<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-simple</artifactId>
	<version>1.6.4</version>
</dependency>

<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>jstl</artifactId>
	<version>1.2</version>
</dependency>
<dependency>
	<groupId>org.codehaus.jackson</groupId>
	<artifactId>jackson-mapper-asl</artifactId>
	<version>1.9.2</version>
</dependency>

<dependency>
	<groupId>org.codehaus.jackson</groupId>
	<artifactId>jackson-core-asl</artifactId>
	<version>1.9.2</version>
</dependency>

<dependency>
	<groupId>com.fasterxml.jackson.core</groupId>
	<artifactId>jackson-databind</artifactId>
	<version>2.5.0</version>
</dependency>

Ai có cách nào hướng dẫn mình xử lý với.

#2

Dùng responseEntity ấy:
ref: http://stackoverflow.com/questions/26320106/spring-return-responsebody-responseentitylistjsonobject
http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/http/ResponseEntity.html

1 Like
#3

Vẫn thế bạn à.

@RequestMapping(value = "/dshs", method = RequestMethod.GET)
	@ResponseBody
	public ResponseEntity<Object> getds(){
		List<JSONObject> entities = new ArrayList<JSONObject>();
		try {
			HocsinhModel hsm = new HocsinhModel();
			for (Hocsinh hs: hsm.findAll()){
				JSONObject obj = new JSONObject();
				obj.put("mahs", hs.getMahs());
				obj.put("ten", hs.getTen());
				obj.put("tuoi", hs.getTuoi());
				entities.add(obj);
			}	
		} catch (Exception e) {
			// TODO: handle exception
			System.out.println(e.getMessage());
		}
    return new ResponseEntity<Object>(entities, HttpStatus.OK);
	}
#4

Cái produces đâu? trong cái link đưa co mà

1 Like
#5

Mình đã bổ sung, nhưng chạy vẫn lỗi 406:

	@RequestMapping(value = "/dshs.html", method = RequestMethod.GET,    produces=MediaType.APPLICATION_JSON_VALUE)
        public ResponseEntity<Object> dshs(){
	    List<JSONObject> entities = new ArrayList<JSONObject>();
	    HocsinhModel hsm = new HocsinhModel();
            try{
		for (Hocsinh hs: hsm.findAll()){
			JSONObject obj = new JSONObject();
			obj.put("mahs", hs.getMahs());
			obj.put("ten", hs.getTuoi());
			obj.put("tuoi", hs.getTuoi());
			entities.add(obj);
		}	
	} catch (Exception e) {
		System.out.println(e.getMessage());
	}
        return new ResponseEntity<Object>(entities, HttpStatus.OK);
}
#6

Cái này do dùng Spring bản 3.2.2, hạ xuống dùng 3.1.4 là hết, đã fix xong lỗi.

1 Like
#7

bản mới cũng được, trong dispathcher-servlet bạn cần thêm định nghĩa bean

<bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
	<property name="favorPathExtension" value="false" />
	<property name="favorParameter" value="true" />
	<property name="mediaTypes" >
		<value>
			json=application/json
			xml=application/xml
		</value>
	</property>
</bean>

là ok

#8

Cám ơn bạn. :grinning:

83% thành viên diễn đàn không hỏi bài tập, còn bạn thì sao?