使用Jackson序列化Java中的数组数组 [英] Serializing an array of arrays in java using Jackson

问题描述

我正在学习如何使用Jackson，并且必须序列化一系列ContoCorrente对象

I'm learning how to use Jackson and I have to serialize an array of ContoCorrente objects

public class ContoCorrente {
    private String proprietario;
    private ArrayList<MovimentoBancario> movimenti;
//methods...
}

其中MovimentoBancario定义为

where MovimentoBancario is defined as

public class MovimentoBancario {
    private String data;
    private String causale;
//methods...
}

我尝试过

ArrayList<ContoCorrente> conti= new ArrayList<ContoCorrente>(50);
        for(int i=0; i<50; i++){
            //fill array
        }
        try {
            ObjectMapper mapper = new ObjectMapper();
            mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
            System.out.println(mapper.writeValueAsString(conti));  
        } catch (Exception e) {
            e.printStackTrace();
        }

但输出是

[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}]

我不知道我在做什么错，这是我第一次尝试序列化

I don't know what I'm doing wrong, it's the first time I try serialization

推荐答案

您可以尝试使用Jackson定义特定方法.

You can try defining a specific method using Jackson.

private static final ObjectMapper objectMapper = new ObjectMapper();
private static final ObjectReader reader = new ObjectMapper().readerFor(Array.class);


public static String toArray(ArrayList<ContoCorrente> array) throws JsonProcessingException {
    return objectMapper.writeValueAsString(array);
}

然后，如果您想阅读，请使用阅读器.

Then if you want to read just use the reader.

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