将JSON映射到POJO时出现java UnrecognizedPropertyException

9 月 Questions & Answers 1790

我使用Jackson API在一组POJO类的帮助下将JSON文件解析为对象。但是当ObjectMapper到达@title字段时，会出现以下无法识别的PropertyException错误：

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "@title" (class gmit.Exit), not marked as ignorable (2 known properties: "title", "direction"])
 at [Source: C:\Users\Brian\Documents\Eclipse\Projects\AI_Project_Grail_Quest_3\bin\resources\game.json; line: 13, column: 24] (through reference chain: gmit.Location["location"]->Object[][0]->gmit.Location["exit"]->Object[][0]->gmit.Exit["@title"])

这是正在解析的JSON文件：

http://hastebin.com/qamacarumu.pl

我知道这是因为属性未被识别为错误状态，但我不确定为什么，因为我在Exit POJO中声明了这个字段。有人试图像这样在字段中添加@JsonProperty，但似乎不起作用：

@JsonProperty("title")
private String[] title;

有人知道如何解决这个错误吗？或者，您可以解释一下，为什么在退出POJO中存在标题字段的情况下仍会抛出此错误

以下是POJO的：

地点：

import java.util.Arrays;

public class Location {

    private Location[] location;

    private String description;

    private String name;

    private Exit[] exit;



    public Location[] getLocation() {
        return location;
    }

    public void setLocation(Location[] location) {
        this.location = location;
    }

    public String getDescription ()
    {
        return description;
    }

    public void setDescription (String description)
    {
        this.description = description;
    }

    public String getName ()
    {
        return name;
    }

    public void setName (String name)
    {
        this.name = name;
    }

    public Exit[] getExit() {
        return exit;
    }

    public void setExit(Exit[] exit) {
        this.exit = exit;
    }

    @Override
    public String toString() {
        return "Location [location=" + Arrays.toString(location)
                + ", description=" + description + ", name=" + name + ", exit="
                + Arrays.toString(exit) + "]";
    }



}

出口：

public class Exit {

    @JsonProperty("title")
    private String[] title;

    private String[] direction;


    public String[] getTitle() {
        return title;
    }
    public void setTitle(String[] title) {
        this.title = title;
    }
    public String[] getDirection() {
        return direction;
    }
    public void setDirection(String[] direction) {
        this.direction = direction;
    }

}

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将JSON映射到POJO时出现java UnrecognizedPropertyException

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