我正在尝试在Java
中创建一个Web服务,该服务接受两个列表作为FormData
参数。
我使用了this answer中提到的Angualr JS http
服务。
var queryRequest = $http({
method:'POST',
url:'services/test/testPath',
data:$.param({"listA":myList1,"listB":myList2}),
headers: {'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8'}
});
我的对象myList1
var myList1=[];
var obj={};
obj["val1"]=1
obj["val2"]=2
myList1.push(obj);
我的对象myList2
var myList2=[];
var obj={};
obj["val11"]=3
obj["val12"]=4
myList2.push(obj);
var obj={};
obj["val11"]=5
obj["val12"]=6
myList2.push(obj);
我正在使用javax.ws.rs.*
作为其余服务
接受数据的我的Java服务器端点是as-
@Path("testPath")
@POST
@Consumes("application/x-www-form-urlencoded;charset=UTF-8")
@Produces("application/json")
public DataDTO addIssuancesForFP(@FormParam("listA") List<TypeA> list1, @FormParam("listB") List<TypeB> list2) {
System.out.println("Service is called correctly");
return service.getDTO(list1,list2);
}
我的classe&#39; TypeA&#39;
private Integer val1;
private Integer val2;
//getters and setters, and default constructor
我的classe&#39; TypeB&#39;
private Integer val11;
private Integer val12;
//getters and setters, and default constructor
端点正确击中,但我在列表中得到null
。请求结构是:
请求类型
Accept:application/json, text/plain, */*
Content-Type:application/x-www-form-urlencoded;charset=UTF-8
表格数据
listA[0][val1]:1
listA[0][val2]:2
listB[0][val11]:3
listB[0][val12]:4
listB[1][val11]:5
listB[1][val12]:6
似乎是正确的,我认为错误在服务器部分。如何解决这个问题?
由于
注意:这只是模拟数据,格式完全相同
答案 0 :(得分:1)
是的,所以我不认为使用表格编码数据会起作用。原因是它主要用于键值对,格式为
key1=value7&key2=value2&key3=value3...
您正在做的只使用两个键,listA
和listB
。因此,想象一下这些值需要什么样才能发送整个列表。它不漂亮。对于复杂数据,以JSON格式发送数据更为可行。针对您的特定用例的问题在于需要发送两个不相关的对象(或数组)。为此,解决方案是使用multipart。你好运,因为我昨天刚刚发布了一个late answer,关于Angular如何处理这个问题。
我不会在这里解释有关代码的解释。一切都在该链接中解释。当你回答这个问题时,请仔细阅读。我将使用Jersey作为JAX-RS实现(如链接中的示例 - 但它还提供其他替代实现)
资源
import java.util.List;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import org.glassfish.jersey.media.multipart.FormDataParam;
@Path("/form")
public class FormResource {
@POST
@Consumes("multipart/form-data")
@Produces("text/plain")
public String addIssuancesForFP(@FormDataParam("listA") List<TypeA> list1,
@FormDataParam("listB") List<TypeB> list2) {
StringBuilder response = new StringBuilder();
for(TypeA a: list1) {
response.append(a.toString()).append("; ");
}
for (TypeB b: list2) {
response.append(b.toString()).append("; ");
}
System.out.println("Service is called correctly");
return response.toString();
}
}
角
<!DOCTYPE html>
<html ng-app="formApp">
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="js/libs/jquery/jquery.js"></script>
<script src="js/libs/angular.js/angular.js"></script>
<script>
angular.module("formApp", [])
.controller("defaultCtrl", function($scope, $http) {
$scope.sendData = function() {
var myList1 = [];
var obj = {};
obj["val1"] = "value1";
obj["val2"] = "value2";
myList1.push(obj);
var myList2 = [];
var obj = {};
obj["val11"] = "value11";
obj["val12"] = "value12";
myList2.push(obj);
var obj = {};
obj["val11"] = "value211";
obj["val12"] = "value212";
myList2.push(obj);
var list1 = JSON.stringify(myList1);
var list2 = JSON.stringify(myList2);
var boundary = Math.random().toString().substr(2);
var header = "multipart/form-data; charset=utf-8; boundary=" + boundary;
$http({
url: "/api/form",
headers: {"Content-Type": header},
data: createRequest(list1, list2, boundary),
method: "POST"
}).then(function(response) {
$scope.result = response.data;
});
function createRequest(list1, list2, boundary) {
var multipart = "";
multipart += "--" + boundary
+ "\r\nContent-Disposition: form-data; name=listA"
+ "\r\nContent-type: application/json"
+ "\r\n\r\n" + list1 + "\r\n";
multipart += "--" + boundary
+ "\r\nContent-Disposition: form-data; name=listB"
+ "\r\nContent-type: application/json"
+ "\r\n\r\n" + list2 + "\r\n";
multipart += "--" + boundary + "--\r\n";
return multipart;
}
};
});
</script>
</head>
<body>
<div ng-controller="defaultCtrl">
<button ng-click="sendData()">Send</button>
<p>{{result}}
</div>
</body>
</html>
结果
TypeA{val1=value1, val2=value2};
TypeB{val1=value11, val2=value12};
TypeB{val1=value211, val2=value212};
这是预期的,因为我刚从toString()
方法构建了一个字符串,我在TypeA
和TypeB
类中实现了这些方法。
public class TypeA {
public String val1;
public String val2;
@Override
public String toString() {
return "TypeA{" + "val1=" + val1 + ", val2=" + val2 + '}';
}
}
public class TypeB {
public String val11;
public String val12;
@Override
public String toString() {
return "TypeB{" + "val1=" + val11 + ", val2=" + val12 + '}';
}
}
希望这有帮助。