Question

我有这个JAXB组件，我想以列表的形式获得：

@XmlRootElement(name = "payment")
@XmlAccessorType(XmlAccessType.FIELD)
public class Transaction {

    @XmlElement(name = "transaction_types")
    public TransactionTypes transactionTypes;
}


public class TransactionTypes {

    @XmlElement(name = "transaction_type")
    public String transaction_type; 
    @XmlAttribute
    public String name;

    public String getTransaction_type() {
        return transaction_type;
    }
    public void setTransaction_type(String transaction_type) {
        this.transaction_type = transaction_type;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

XML结构：

<payment>
  <transaction_types>
    <transaction_type name="type1"/>
    <transaction_type name="type2"/>
    <transaction_type name="type3"/>
  </transaction_types>
</payment>

问题是如何获取所有交易类型的列表？

您能告诉我一些如何修改JAXB对象吗？

编辑：

我尝试过

@XmlRootElement(name = "payment")
    @XmlAccessorType(XmlAccessType.FIELD)
    public class Transaction {

        @XmlElementWrapper(name = "transaction_types")
        public List<TransactionTypes> transactionTypes;
    }

将保存列表的内部对象：

    public class TransactionTypes {

    @XmlElement(name = "transaction_type")
    public String transaction_type; 
    @XmlAttribute
    public String name;

    public String getTransaction_type() {
        return transaction_type;
    }
    public void setTransaction_type(String transaction_type) {
        this.transaction_type = transaction_type;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

Answer 1

要获得所有transaction_type的列表，我对您的代码做了一些修改。我介绍了一个新类TransactionList，它将包含transaction_type

的列表

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "payment")
@XmlAccessorType(XmlAccessType.FIELD)
public class Transaction {

@XmlElement(name = "transaction_types")
public TransactionList transactionList;

public Transaction() {
    super();
}

@Override
public String toString() {
    return "Transaction [TransactionList=" + transactionList + "]";
 }
}

TransactionList类

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;

@XmlAccessorType(XmlAccessType.FIELD)
public class TransactionList {
@XmlElement(name = "transaction_type")
public List<TransactionType> transactionType;

public TransactionList(List<TransactionType> transactionTypes) {
    transactionType = transactionTypes;
}

public TransactionList() {
    super();
}

@Override
public String toString() {
    StringBuilder sb = new StringBuilder();
    for (TransactionType transactionType : transactionType) {
        sb.append(transactionType + "\n");
    }
    return sb.toString();
}
}

TransactionType类

 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlAttribute;
 import javax.xml.bind.annotation.XmlElement;

@XmlAccessorType(XmlAccessType.FIELD)
public class TransactionType {
@XmlElement(name = "transaction_type")
private String transaction_type;
@XmlAttribute
private String name;

public TransactionType(String transaction_type, String name) {
    this.transaction_type = transaction_type;
    this.name = name;
}

public TransactionType() {
}

public String getTransaction_type() {
    return transaction_type;
}

public void setTransaction_type(String transaction_type) {
    this.transaction_type = transaction_type;
}

public String getName() {
    return name;
}

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

@Override
public String toString() {
    return "TransactionTypes [transaction_type=" + transaction_type + ", name=" + name + "]";
}

}

主要方法

public static void main(String[] args) throws Exception {
    JAXBContext context = JAXBContext.newInstance(Transaction.class);
    Unmarshaller um = context.createUnmarshaller();
    Transaction transaction = (Transaction) um.unmarshal(new FileReader(FILE));
    System.out.println(transaction);
}

您还可以通过直接将transactionType表中的变量List更改为Transaction并为其分配XMLElementWrapper批注来检查输出

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "payment")
@XmlAccessorType(XmlAccessType.FIELD)
public class Transaction {

@XmlElementWrapper(name = "transaction_types")
public List<TransactionType> transactionType;

public Transaction() {
}
}

获取元素作为列表

1 个答案: