我在這個論壇和其他人看了很多關於這個問題的答案,代碼看起來不錯,但問題仍然存在。當我做POST請求時,我得到400錯誤代碼(錯誤的請求)。但是當我從POSTMAN客戶端調用相同的資源時,我成功地得到了迴應。任何人都可以看看我的代碼,看看我做錯了什麼。Ajax POST請求不起作用
public class Country{
int id;
String countryName;
@JsonCreator
public Country(@JsonProperty("id")int id, @JsonProperty("countryName")String countryName) {
this.id = id;
this.countryName = countryName;
}
....setter/getters
}
REST控制器的文件
@RestController
public class CountryController {
static List<Country> listOfCountries = new ArrayList<Country>();
static{
createCountryList();
}
@RequestMapping(value = "/countries", method = RequestMethod.GET,headers="Accept=application/json")
public List<Country> getCountries()
{
return listOfCountries;
}
@RequestMapping(value = "/addCountry", method = RequestMethod.POST,headers="Accept=application/json")
public List<Country> addCountry(@RequestBody Country country)
{System.out.println("addcountry called"+country);
listOfCountries.add(country);
return listOfCountries;
}
@RequestMapping(value = "/country/{id}", method = RequestMethod.GET,headers="Accept=application/json")
public Country getCountryById(@PathVariable int id)
{
for (Country country: listOfCountries) {
if(country.getId()==id)
return country;
}
return null;
}
// Utiliy method to create country list.
public static List<Country> createCountryList()
{
Country indiaCountry=new Country(1, "India");
Country chinaCountry=new Country(4, "China");
Country nepalCountry=new Country(3, "Nepal");
Country bhutanCountry=new Country(2, "Bhutan");
listOfCountries.add(indiaCountry);
listOfCountries.add(chinaCountry);
listOfCountries.add(nepalCountry);
listOfCountries.add(bhutanCountry);
return listOfCountries;
}
}
JS文件內容
$(function() {
var $ords = $('#orders');
var $cid = $('#cid');
var $name = $('#name');
function displayOrder(country){
$ords.append('<li>Id :' + country.id + ',name : '+ country.countryName + '</li>');
}
$.ajax({
type : 'GET',
url : 'http://localhost:8080/SpringRestfulWebServicesWithJSONExample/countries',
success : function(data) {
// data = JSON.parse(data);
$.each(data, function(i, country) {
displayOrder(country);
});
},
error : function() {
alert("error loading data");
}
});
$("#add").on("click", function(){
var country= {
id:$cid.val(),
countryName:$name.val()
};
$.ajax({
type : 'POST',
url : 'http://localhost:8080/SpringRestfulWebServicesWithJSONExample/addCountry',
data:country,
contentType: "application/json",
success : function(newData) {
// data = JSON.parse(data);
$.each(newData, function(i, country) {
displayOrder(country);
});
},
error : function() {
alert("error loading data");
}
});
});
});
HTML網頁的相關部分
<body>
<h2>Country Names</h2>
<ul id="orders">
</ul>
<p>Id: <input type="text" id="cid"></p>
<p>Name: <input type="text" id="name"></p>
<button id="add">Add</button>
</body>
如果頁面是您需要實現服務器CORS不同的端口上。查看瀏覽器開發工具控制檯會看到CORS錯誤 – charlietfl
不,頁面正在8080上運行,並且服務控制器也在同一端口上運行。 – Surinder
檢查瀏覽器開發工具網絡中的實際請求以準確查看發送的內容 – charlietfl