如何用Java中的XStream构建更好的XML？ [英] how to build a better looking XML with XStream in Java?

问题描述

  public static 
我在类中创建了一个main（）方法来测试XML文件的构造。 void main（String [] args）{
 createXmlEmail（）; 
} 
  

这是构建XML文件的方法。 b
$ b pre code $ private static void createXmlEmail（）{
XStream xstream = new XStream（new DomDriver（））;
xstream.setMode（XStream.NO_REFERENCES）;
xstream.alias（email，EmailPojo.class）;
xstream.alias（recipient，Recipient.class）;

EmailPojo ep = new EmailPojo（）;

列表<收件人> toRecipient = new ArrayList< Recipient>（）;
toRecipient.add（新收件人（[e-mail]））;
toRecipient.add（新收件人（[e-mail]））;

列表<收件人> ccRecipient = new ArrayList< Recipient>（）;
ccRecipient.add（新收件人（[e-mail]））;
ccRecipient.add（新收件人（[e-mail]））;

列表<收件人> bccRecipient = new ArrayList< Recipient>（）;
bccRecipient.add（新收件人（[e-mail]））;
bccRecipient.add（新收件人（[e-mail]））;

ep.setTo（toRecipient）;
ep.setCc（ccRecipient）;
ep.setBcc（bccRecipient）;
ep.setSubject（subject test）;
ep.setBody（body test）;

String xml = xstream.toXML（ep）;
System.out.println（xml）;

提到的EmailPojo和Recipient类定义如下：

  public static class EmailPojo {
 private List< Recipient>至; 
私人列表<收件人>立方厘米; 
私人列表<收件人> BCC; 
 private String subject; 
私人字符串正文; 
 
公共列表<收件人> getTo（）{
返回; 
 
 
 public void setTo（List< Recipient> to）{
 this.to = to; 
} 
 
 public List< Recipient> getCc（）{
 return cc; 
 
 
 public void setCc（List< Recipient> cc）{
 this.cc = cc; 
} 
 
 public List< Recipient> getBcc（）{
返回密件抄送; 
 
 
 public void setBcc（List< Recipient> bcc）{
 this.bcc = bcc; 
} 
 
 public String getSubject（）{
 return subject; 
} 
 
 public void setSubject（String subject）{
 this.subject = subject; 
} 
 
 public String getBody（）{
 return body; 
} 
 
 public void setBody（String body）{
 this.body = body; 
} 
} 
 
 
 public static class Recipient {
 private String recipient; 
 
公共收件人（字符串收件人）{
 this.recipient =收件人; 
} 
 
 public String getRecipient（）{
 return recipient; 
} 
 
 public void setRecipient（String recipient）{
 this.recipient = recipient; 
 
 
 $ / code $ / pre 
 
当我运行这个主类时，得到任何错误或异常，并输出：
 
 
 < email> 
< to> 
<收件人> 
<收件人> [e-mail]< /收件人> 
< / recipient> 
<收件人> 
<收件人> [e-mail]< / recipient> 
< / recipient> 
< /至> 
< cc> 
<收件人> 
<收件人> [e-mail]< /收件人> 
< / recipient> 
<收件人> 
<收件人> [e-mail]< /收件人> 
< / recipient> 
< / cc> 
< bcc> 
<收件人> 
<收件人> [e-mail]< /收件人> 
< / recipient> 
<收件人> 
<收件人> [e-mail]< /收件人> 
< / recipient> 
< / bcc> 
< subject>科目考试< /科目> 
< body>身体测试< / body> 
< / email> 
  
但是，我希望它是这样的：
 < email> 
< to> 
<收件人> [e-mail]< /收件人> 
<收件人> [e-mail]< / recipient> 
< /至> 
< cc> 
<收件人> [e-mail]< /收件人> 
<收件人> [e-mail]< /收件人> 
< / cc> 
< bcc> 
<收件人> [e-mail]< /收件人> 
<收件人> [e-mail]< /收件人> 
< / bcc> 
< subject>科目考试< /科目> 
< body>身体测试< / body> 
< / email> 
  
我在这里错过了什么？ 
 
 
提前致谢！
解决方案
这是因为Recipient类具有属性收件人。如果您标记您的集合@XStreamImplicit，那么外部收件人标记将被消除。
 
 
 
请参阅隐式集合 
 
I've created a main() method in a class to test the construction of a XML file.
public static void main(String[] args) {
    createXmlEmail();
}
And this is the method that builds the XML file.
private static void createXmlEmail() {
    XStream xstream = new XStream(new DomDriver());
    xstream.setMode(XStream.NO_REFERENCES);
    xstream.alias("email", EmailPojo.class);
    xstream.alias("recipient", Recipient.class);

    EmailPojo ep = new EmailPojo();

    List<Recipient> toRecipient = new ArrayList<Recipient>();
    toRecipient.add(new Recipient("[e-mail]"));
    toRecipient.add(new Recipient("[e-mail]"));

    List<Recipient> ccRecipient = new ArrayList<Recipient>();
    ccRecipient.add(new Recipient("[e-mail]"));
    ccRecipient.add(new Recipient("[e-mail]"));

    List<Recipient> bccRecipient = new ArrayList<Recipient>();
    bccRecipient.add(new Recipient("[e-mail]"));
    bccRecipient.add(new Recipient("[e-mail]"));

    ep.setTo(toRecipient);
    ep.setCc(ccRecipient);
    ep.setBcc(bccRecipient);
    ep.setSubject("subject test");
    ep.setBody("body test");

    String xml = xstream.toXML(ep);
    System.out.println(xml);
}
The EmailPojo and Recipient classes mentioned are defined as:
public static class EmailPojo {
        private List<Recipient> to;
        private List<Recipient> cc;
        private List<Recipient> bcc;
        private String subject;
        private String body;

        public List<Recipient> getTo() {
            return to;
        }

        public void setTo(List<Recipient> to) {
            this.to = to;
        }

        public List<Recipient> getCc() {
            return cc;
        }

        public void setCc(List<Recipient> cc) {
            this.cc = cc;
        }

        public List<Recipient> getBcc() {
            return bcc;
        }

        public void setBcc(List<Recipient> bcc) {
            this.bcc = bcc;
        }

        public String getSubject() {
            return subject;
        }

        public void setSubject(String subject) {
            this.subject = subject;
        }

        public String getBody() {
            return body;
        }

        public void setBody(String body) {
            this.body = body;
        }
    }


public static class Recipient {
    private String recipient;

    public Recipient(String recipient) {
        this.recipient = recipient;
    }

    public String getRecipient() {
        return recipient;
    }

    public void setRecipient(String recipient) {
        this.recipient = recipient;
    }
}
When I run this main class, I don't get any errors or exceptions and the output is:
<email>
  <to>
    <recipient>
      <recipient>[e-mail]</recipient>
    </recipient>
    <recipient>
      <recipient>[e-mail]</recipient>
    </recipient>
  </to>
  <cc>
    <recipient>
      <recipient>[e-mail]</recipient>
    </recipient>
    <recipient>
      <recipient>[e-mail]</recipient>
    </recipient>
  </cc>
  <bcc>
    <recipient>
      <recipient>[e-mail]</recipient>
    </recipient>
    <recipient>
      <recipient>[e-mail]</recipient>
    </recipient>
  </bcc>
  <subject>subject test</subject>
  <body>body test</body>
</email>
But I'd like it to be like this:
<email>
  <to>
    <recipient>[e-mail]</recipient>
    <recipient>[e-mail]</recipient>
  </to>
  <cc>
    <recipient>[e-mail]</recipient>
    <recipient>[e-mail]</recipient>
  </cc>
  <bcc>
    <recipient>[e-mail]</recipient>
    <recipient>[e-mail]</recipient>
  </bcc>
  <subject>subject test</subject>
  <body>body test</body>
</email>
What am I missing here?

Thanks in advance!
解决方案
This is because Recipient class has property recipient. If you mark your collections @XStreamImplicit, then the outer recipient tags will be eliminated.

See Implicit Collections

                        
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