JSON文字列をJavaオブジェクトリストに変換中にトークンエラーが認識されない

Question

ここには、Javaオブジェクトリストとして変換したい文字列のJSONがあります。

String manuallyVerificationRemarks = "[{ 
    "logedInUserName": "forum-admin", 
    "actionDate": null, 
    "action": null, 
    "remarksText": "done by admin..." 
}, { 
    "logedInUserName": null, 
    "actionDate": null, 
    "action": null, 
    "remarksText": null 
}]"; 

ここでは、文字列をオブジェクトに変換する方法を示します。

private ObjectMapper objectMapper = new ObjectMapper(); 
try{ 
    remarksDtoList = objectMapper.readValue(manuallyVerificationRemarks, new TypeReference<List<RemarksDTO>>() {}); 
} catch (Exception e) { 
    e.printStackTrace(); 
} 

そしてここでは、ターゲットDTOある

public class RemarksDTO implements Serializable { 

    /** 
    * serialVersionUID 
    */ 
    private static final long serialVersionUID = 1L; 

    private String logedInUserName; 

    private Date actionDate; 

    private String action; 

    private String remarksText; 

    RemarksDTO(){ 
     super(); 
    } 
    public RemarksDTO(String remarks,String userName){ 
     this.remarksText = remarks; 
     this.logedInUserName=userName; 
    } 
    public RemarksDTO(String userName,Date actionDate,String action,String remarks){ 
     this.logedInUserName =userName; 
     this.action=action; 
     this.remarksText = remarks; 
     this.actionDate = actionDate; 

    } 
    public String getLogedInUserName() { 
     return logedInUserName; 
    } 

    public void setLogedInUserName(String logedInUserName) { 
     this.logedInUserName = logedInUserName; 
    } 

    public String getRemarksText() { 
     return remarksText; 
    } 

    public void setRemarksText(String remarksText) { 
     this.remarksText = remarksText; 
    } 
    public RemarksDTO(String remarks){ 
     this.remarksText = remarks; 
    } 

    public Date getActionDate() { 
     return actionDate; 
    } 
    public void setActionDate(Date actionDate) { 
     this.actionDate = actionDate; 
    } 
    public String getAction() { 
     return action; 
    } 
    public void setAction(String action) { 
     this.action = action; 
    } 
    @Override 
    public String toString(){ 
     return "RemarksDTO [logedInUserName=" + logedInUserName + ", remarksText=" + remarksText + "]"; 

    } 
} 

私は、次のエラーを取得しています：匿名型の宣言がand here is error trace.... com.fasterxml.jackson.databind.JsonMappingException: Unrecognized token 'nul': was expecting 'null', 'true', 'false' or NaN at [Source: [{"logedInUserName":"forum-admin","actionDate":nul l,"action":null,"remarksText":"new simple Test is abused done by admin."},{"logedInUserName":null,"actionDate":null,"action":null,"remarksText":null}]; line: 1, column: 51] at [Source: [{"logedInUserName":"forum-admin","actionDate":nul l,"action":null,"remarksText":"new simple Test is abused done by admin."},{"logedInUserName":null,"actionDate":null,"action":null,"remarksText":null}]; line: 1, column: 35] (through reference chain: java.util.ArrayList[0])

Answer 1

例外メッセージがあなたの代わりに「NUL」を持って伝える評価式で使用することはできません入力内のnull/true/false/NaNの値：

[{"logedInUserName":"forum-admin","actionDate":nul 
.. 
[{"logedInUserName":"forum-admin","actionDate":nul 

したがって、pareserはDTOのactionDateプロパティにこの値をマップすることはできません。人工的なシンボルの入力を確認してください。