Question

这是我的JSON字符串

"[{"name":"3214657890RootSAPSSE","children":[{"name":"672BENIAMEEN .Sales Base Market SectionCustomer Representative"},{"name":"672BENIAMEEN .Sales Base Market SectionPeão"}]}]"

当我将它解析为java中的json对象时，我得到null。该字段来自HTML隐藏字段，它来自java脚本。

这是我的java代码

String x = request.getParameter("JSONString");
System.out.println(x);
        JSONArray jsonObject = (JSONArray) JSONValue.parse(x);
        Gson gson = new Gson(); 
        java.lang.reflect.Type type = new TypeToken<List<EmployeeJSONObj>>(){}.getType();
        List<EmployeeJSONObj>l = gson.fromJson(jsonObject.toJSONString(), type);
        System.out.println(l.get(0).getName());

这是我的Java类

public  class EmployeeJSONObj {
    private String name;
    private List<EmployeeJSONObj> children = new LinkedList<>();
    EmployeeJSONObj()
    {

    }
    public String getName()
    {
        return name;
    }

    public String toString() {
        return "name: " + name + ", children = " + children;
    }

}

Answer 1

不要像这样双重解析字符串;这样做是没有意义的。将x直接传递给GSON。

String x = request.getParameter("JSONString");
Gson gson = new Gson(); 
java.lang.reflect.Type type = new TypeToken<List<EmployeeJSONObj>>(){}.getType();
List<EmployeeJSONObj>l = gson.fromJson(x, type);
System.out.println(l.get(0).getName());

JSON字符串到java中的JSON对象

1 个答案: