解析Java中一行中存在的多个JSON对象

Question

我目前正在使用 OMDB API，它可以将 get-queries 作为 JSON 对象或 XML 返回。使用 JSON 是我想学习的东西，它通常似乎是我正在尝试做的最好的解决方案。我希望的实现是允许用户搜索电影，并从列表中选择正确的电影。我目前正在使用 google.gson 库。

我遇到的问题是，使用 OMDB 按标题搜索电影，此示例为“蝙蝠侠”，返回以下字符串：

{"Search":[{"Title":"Batman Begins","Year":"2005","imdbID":"tt0372784","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BOTY4YjI2N2MtYmFlMC00ZjcyLTg3YjEtMDQyM2ZjYzQ5YWFkXkEyXkFqcGdeQXVyMTQxNzMzNDI@._V1_SX300.jpg"},{"Title":"Batman v Superman: Dawn of Justice","Year":"2016","imdbID":"tt2975590","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BYThjYzcyYzItNTVjNy00NDk0LTgwMWQtYjMwNmNlNWJhMzMyXkEyXkFqcGdeQXVyMTQxNzMzNDI@._V1_SX300.jpg"},{"Title":"Batman","Year":"1989","imdbID":"tt0096895","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BMTYwNjAyODIyMF5BMl5BanBnXkFtZTYwNDMwMDk2._V1_SX300.jpg"},{"Title":"Batman Returns","Year":"1992","imdbID":"tt0103776","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BOGZmYzVkMmItM2NiOS00MDI3LWI4ZWQtMTg0YWZkODRkMmViXkEyXkFqcGdeQXVyODY0NzcxNw@@._V1_SX300.jpg"},{"Title":"Batman Forever","Year":"1995","imdbID":"tt0112462","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BNDdjYmFiYWEtYzBhZS00YTZkLWFlODgtY2I5MDE0NzZmMDljXkEyXkFqcGdeQXVyMTMxODk2OTU@._V1_SX300.jpg"},{"Title":"Batman & Robin","Year":"1997","imdbID":"tt0118688","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BMGQ5YTM1NmMtYmIxYy00N2VmLWJhZTYtN2EwYTY3MWFhOTczXkEyXkFqcGdeQXVyNTA2NTI0MTY@._V1_SX300.jpg"},{"Title":"The Lego Batman Movie","Year":"2017","imdbID":"tt4116284","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BMTcyNTEyOTY0M15BMl5BanBnXkFtZTgwOTAyNzU3MDI@._V1_SX300.jpg"},{"Title":"Batman: The Animated Series","Year":"1992–1995","imdbID":"tt0103359","Type":"series","Poster":"https://m.media-amazon.com/images/M/MV5BOTM3MTRkZjQtYjBkMy00YWE1LTkxOTQtNDQyNGY0YjYzNzAzXkEyXkFqcGdeQXVyOTgwMzk1MTA@._V1_SX300.jpg"},{"Title":"Batman: Under the Red Hood","Year":"2010","imdbID":"tt1569923","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BNmY4ZDZjY2UtOWFiYy00MjhjLThmMjctOTQ2NjYxZGRjYmNlL2ltYWdlL2ltYWdlXkEyXkFqcGdeQXVyNTAyODkwOQ@@._V1_SX300.jpg"},{"Title":"Batman: The Dark Knight Returns, Part 1","Year":"2012","imdbID":"tt2313197","Type":"movie","Poster":"https://m.media-amazon.com/images/M/MV5BMzIxMDkxNDM2M15BMl5BanBnXkFtZTcwMDA5ODY1OQ@@._V1_SX300.jpg"}],"totalResults":"490","Response":"True"}

到目前为止，我已经设法使用sendGetRequest(requestURL).substring(11, sendGetRequest(requestURL).length()-41); 删除了{"Search":[ 和],"totalResults":"490","Response":"True"} 部分，但我似乎仍然无法将字符串解析为JSON。我尝试使用带有各种正则表达式的 String.split 和 Matcher/Pattern 来分离 JsonObjects。我也尝试过 JSONArray，但无济于事。

我是使用 JSON 的新手，所以我不太可能遗漏一些明显的东西或完全误解了 JSON。

Answer 1

首先根据您的需要定义一个新的自定义类：

import com.fasterxml.jackson.annotation.JsonProperty;

public class YourClass {
    @JsonProperty("Title")
    private String title;
    @JsonProperty("Year")
    private String year;
    private String imdbID;
    @JsonProperty("Type")
    private String type;
    @JsonProperty("Poster")
    private String poster;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getYear() {
        return year;
    }

    public void setYear(String year) {
        this.year = year;
    }

    public String getImdbID() {
        return imdbID;
    }

    public void setImdbID(String imdbID) {
        this.imdbID = imdbID;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getPoster() {
        return poster;
    }

    public void setPoster(String poster) {
        this.poster = poster;
    }

    @Override
    public String toString() {
        return "YourClass{" +
                "title='" + title + '\'' +
                ", year='" + year + '\'' +
                ", imdbID='" + imdbID + '\'' +
                ", type='" + type + '\'' +
                ", poster='" + poster + '\'' +
                '}';
    }
}

然后你可以简单地解析你的 JSON，这是 ma​​in 方法：

public static void main(String[] args) throws JsonProcessingException {
    SpringApplication.run(Demo2Application.class, args);


    ObjectMapper objectMapper = new ObjectMapper();

    List<YourClass> yourClassList = objectMapper.readValue("[{\"Title\":\"Batman Begins\",\"Year\":\"2005\",\"imdbID\":\"tt0372784\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BOTY4YjI2N2MtYmFlMC00ZjcyLTg3YjEtMDQyM2ZjYzQ5YWFkXkEyXkFqcGdeQXVyMTQxNzMzNDI@._V1_SX300.jpg\"},{\"Title\":\"Batman v Superman: Dawn of Justice\",\"Year\":\"2016\",\"imdbID\":\"tt2975590\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BYThjYzcyYzItNTVjNy00NDk0LTgwMWQtYjMwNmNlNWJhMzMyXkEyXkFqcGdeQXVyMTQxNzMzNDI@._V1_SX300.jpg\"},{\"Title\":\"Batman\",\"Year\":\"1989\",\"imdbID\":\"tt0096895\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BMTYwNjAyODIyMF5BMl5BanBnXkFtZTYwNDMwMDk2._V1_SX300.jpg\"},{\"Title\":\"Batman Returns\",\"Year\":\"1992\",\"imdbID\":\"tt0103776\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BOGZmYzVkMmItM2NiOS00MDI3LWI4ZWQtMTg0YWZkODRkMmViXkEyXkFqcGdeQXVyODY0NzcxNw@@._V1_SX300.jpg\"},{\"Title\":\"Batman Forever\",\"Year\":\"1995\",\"imdbID\":\"tt0112462\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BNDdjYmFiYWEtYzBhZS00YTZkLWFlODgtY2I5MDE0NzZmMDljXkEyXkFqcGdeQXVyMTMxODk2OTU@._V1_SX300.jpg\"},{\"Title\":\"Batman & Robin\",\"Year\":\"1997\",\"imdbID\":\"tt0118688\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BMGQ5YTM1NmMtYmIxYy00N2VmLWJhZTYtN2EwYTY3MWFhOTczXkEyXkFqcGdeQXVyNTA2NTI0MTY@._V1_SX300.jpg\"},{\"Title\":\"The Lego Batman Movie\",\"Year\":\"2017\",\"imdbID\":\"tt4116284\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BMTcyNTEyOTY0M15BMl5BanBnXkFtZTgwOTAyNzU3MDI@._V1_SX300.jpg\"},{\"Title\":\"Batman: The Animated Series\",\"Year\":\"1992–1995\",\"imdbID\":\"tt0103359\",\"Type\":\"series\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BOTM3MTRkZjQtYjBkMy00YWE1LTkxOTQtNDQyNGY0YjYzNzAzXkEyXkFqcGdeQXVyOTgwMzk1MTA@._V1_SX300.jpg\"},{\"Title\":\"Batman: Under the Red Hood\",\"Year\":\"2010\",\"imdbID\":\"tt1569923\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BNmY4ZDZjY2UtOWFiYy00MjhjLThmMjctOTQ2NjYxZGRjYmNlL2ltYWdlL2ltYWdlXkEyXkFqcGdeQXVyNTAyODkwOQ@@._V1_SX300.jpg\"},{\"Title\":\"Batman: The Dark Knight Returns, Part 1\",\"Year\":\"2012\",\"imdbID\":\"tt2313197\",\"Type\":\"movie\",\"Poster\":\"https://m.media-amazon.com/images/M/MV5BMzIxMDkxNDM2M15BMl5BanBnXkFtZTcwMDA5ODY1OQ@@._V1_SX300.jpg\"}]", new TypeReference<ArrayList<YourClass>>() {});

    for (YourClass yourClass: yourClassList) {
        System.out.println(yourClass);
    }
}

PS：请记住，您不能像您在问题中所说的那样从 JSON 中删除括号 []。