Question

我想使用Java解析JSON，但出现以下错误：com.fasterxml.jackson.databind.exc.MismatchedInputException：com.fasterxml.jackson.databind.exc.MismatchedInputException：无法反序列化{{1}的实例}超出START_OBJECT令牌在[来源：（字符串）”

我的Json看起来像这样：

java.util.ArrayList<com.footbal.dtoStatistics.Statistics>

我用于解析的类是：

{
    "api": {
        "results": 16,
        "statistics": {
            "Shots on Goal": {
                "home": "3",
                "away": "9"
            },
            "Shots off Goal": {
                "home": "5",
                "away": "3"
            },
            "Total Shots": {
                "home": "11",
                "away": "16"
            },
            "Blocked Shots": {
                "home": "3",
                "away": "4"
            },
            "Shots insidebox": {
                "home": "4",
                "away": "14"
            },
            "Shots outsidebox": {
                "home": "7",
                "away": "2"
            },
            "Fouls": {
                "home": "10",
                "away": "13"
            },
            "Corner Kicks": {
                "home": "7",
                "away": "4"
            },
            "Offsides": {
                "home": "2",
                "away": "1"
            },
            "Ball Possession": {
                "home": "55%",
                "away": "45%"
            },
            "Yellow Cards": {
                "home": "0",
                "away": "2"
            },
            "Red Cards": {
                "home": null,
                "away": null
            },
            "Goalkeeper Saves": {
                "home": "7",
                "away": "1"
            },
            "Total passes": {
                "home": "543",
                "away": "436"
            },
            "Passes accurate": {
                "home": "449",
                "away": "355"
            },
            "Passes %": {
                "home": "83%",
                "away": "81%"
            }
        }
    }
}

public class StatisticsResponse {

    Api api;

    public Api getApi() {
        return api;
    }

    public void setApi(Api api) {
        this.api = api;
    }
}

public class Api {

    int results;
    List<Statistics> statistics;

    public int getResults() {
        return results;
    }

    public void setResults(int results) {
        this.results = results;
    }

    public List<Statistics> getStatistics() {
        return statistics;
    }

    public void setStatistics(List<Statistics> statistics) {
        this.statistics = statistics;
    }
}

public class Statistics {

    @JsonAlias({"Shots On Goal"})
    Stats ShotsonGoal;

    @JsonAlias({"Shots Off Goal"})
    Stats ShotsoffGoal;

    @JsonAlias({"Total Shots"})
    Stats TotalShots;

    @JsonAlias({"Blocked Shots"})
    Stats BlockedShots;

    @JsonAlias({"Shots insidebox"})
    Stats Shotsinsidebox;

    @JsonAlias({"Shots outsidebox"})
    Stats Shotsoutsidebox;
    Stats Fouls;

    @JsonAlias({"Corner Kicks"})
    Stats CornerKicks;
    Stats Offsides;

    @JsonAlias({"Ball Possession"})
    Stats BallPossesion;

    @JsonAlias({"Yellow Cards"})
    Stats YellowCards;

    @JsonAlias({"Red Cards"})
    Stats RedCards;

    @JsonAlias({"Goalkeeper Saves"})
    Stats GoalkeeperSaves;

    @JsonAlias({"Total passes"})
    Stats Totalpasses;

    @JsonAlias({"Passes accurate"})
    Stats Passesaccurate;

    @JsonAlias({"Passes %"})
    Stats Passes;

    public Stats getShotsonGoal() {
        return ShotsonGoal;
    }

    public void setShotsonGoal(Stats shotsonGoal) {
        ShotsonGoal = shotsonGoal;
    }

    public Stats getShotsoffGoal() {
        return ShotsoffGoal;
    }

    public void setShotsoffGoal(Stats shotsoffGoal) {
        ShotsoffGoal = shotsoffGoal;
    }

    public Stats getTotalShots() {
        return TotalShots;
    }

    public void setTotalShots(Stats totalShots) {
        TotalShots = totalShots;
    }

    public Stats getBlockedShots() {
        return BlockedShots;
    }

    public void setBlockedShots(Stats blockedShots) {
        BlockedShots = blockedShots;
    }

    public Stats getShotsinsidebox() {
        return Shotsinsidebox;
    }

    public void setShotsinsidebox(Stats shotsinsidebox) {
        Shotsinsidebox = shotsinsidebox;
    }

    public Stats getShotsoutsidebox() {
        return Shotsoutsidebox;
    }

    public void setShotsoutsidebox(Stats shotsoutsidebox) {
        Shotsoutsidebox = shotsoutsidebox;
    }

    public Stats getFouls() {
        return Fouls;
    }

    public void setFouls(Stats fouls) {
        Fouls = fouls;
    }

    public Stats getCornerKicks() {
        return CornerKicks;
    }

    public void setCornerKicks(Stats cornerKicks) {
        CornerKicks = cornerKicks;
    }

    public Stats getOffsides() {
        return Offsides;
    }

    public void setOffsides(Stats offsides) {
        Offsides = offsides;
    }

    public Stats getBallPossesion() {
        return BallPossesion;
    }

    public void setBallPossesion(Stats ballPossesion) {
        BallPossesion = ballPossesion;
    }

    public Stats getYellowCards() {
        return YellowCards;
    }

    public void setYellowCards(Stats yellowCards) {
        YellowCards = yellowCards;
    }

    public Stats getRedCards() {
        return RedCards;
    }

    public void setRedCards(Stats redCards) {
        RedCards = redCards;
    }

    public Stats getGoalkeeperSaves() {
        return GoalkeeperSaves;
    }

    public void setGoalkeeperSaves(Stats goalkeeperSaves) {
        GoalkeeperSaves = goalkeeperSaves;
    }

    public Stats getTotalpasses() {
        return Totalpasses;
    }

    public void setTotalpasses(Stats totalpasses) {
        Totalpasses = totalpasses;
    }

    public Stats getPassesaccurate() {
        return Passesaccurate;
    }

    public void setPassesaccurate(Stats passesaccurate) {
        Passesaccurate = passesaccurate;
    }

    public Stats getPasses() {
        return Passes;
    }

    public void setPasses(Stats passes) {
        Passes = passes;
    }

public class Stats {

    int home;
    int away;

    public int getHome() {
        return home;
    }

    public void setHome(int home) {
        this.home = home;
    }

    public int getAway() {
        return away;
    }

    public void setAway(int away) {
        this.away = away;
    }
}

我认为我的问题可能来自统计数组中值的名称包含空格的事实，并且我认为JsonAlias的东西存在问题，但是我不知道如何声明它。

有人可以帮助我进行此解析吗？

Answer 1

您的Json没有List的{{1}}，它是JSON对象

statistics

如果它是一个列表，应该是

 "statistics": {

因此，如果您不想使用列表，请仅使用["statistics": {，

Statistics

Answer 2

需要将以下更改应用于现有数据模型：

如先前建议的那样，将类型data() { return { selectedTaskIndex: undefined, selectedTaskID:null, //update this tasks: [] }; },更改为created: function() { this.tasks = api.getTasks(); console.log('set this.tasks in TasksLists.vue to') console.log(this.tasks); this.selectedTaskID = this.selectedTaskIDProp; //update this }：

List<Statistics>

将@JsonAlias更改为@JsonProperty，
将BallPossesion的类型更改为Statistics
添加@JsonAutoDetect以禁用序列化中的重复输出

public class Api {

    int results;
    Statistics statistics;

    public int getResults() { return results; }
    public void setResults(int results) { this.results = results; }

    public Statistics getStatistics() { return statistics; }
    public void setStatistics(Statistics statistics) {
        this.statistics = statistics;
    }
}

提供用于正确解析百分比数据的类

更新：您可以使用@ JsonDeserialize / @ JsonSerialize注释并实现自定义转换器

StatsPercent

Answer 3

我认为唯一的出路就是改变

    List<Statistics> statistics;

到

    Map<String,Stats> statistics;

删除Statistics类并通过Map

访问其字段

解析JSON异常-无法反序列化

3 个答案: