json字符串与xml之间转换 json数组与集合之间转换

 

 

 

import net.sf.json.JSON; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import net.sf.json.xml.XMLSerializer; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.dom4j.*; import org.dom4j.io.XMLWriter;

 

 

public class Demo {  private String firstName;  private String lastName;  private String email;  private static String jsonString = "{ \"programmers\": [{ \"firstName\": \"Elliotte\", \"lastName\":\"Harold\",\"email\": \"[email protected]\" }],"    + " \"authors\": [{ \"firstName\": \"Isaac\", \"lastName\": \"Asimov\", \"genre\": \"science fiction\" }],"    + " \"musicians\": [{ \"firstName\": \"Eric\", \"lastName\": \"Clapton\", \"instrument\": \"guitar\" },"    + "  { \"firstName\": \"Sergei\", \"lastName\": \"Rachmaninoff\", \"instrument\": \"piano\" }] }";

 

 

public String getFirstName() {   return firstName;  }  public void setFirstName(String firstName) {   this.firstName = firstName;  }  public String getLastName() {   return lastName;  }  public void setLastName(String lastName) {   this.lastName = lastName;  }  public String getEmail() {   return email;  }  public void setEmail(String email) {   this.email = email;  }

 

 

/**   * JsonArray to List   *   * @param <T>   * @param obj   * @param clazz   * @return   */  public static <T> List<T> JsonToList(Object obj, Class clazz) {   JSONObject jsonObj = JSONObject.fromObject(jsonString);   List<T> list = new ArrayList<T>();   for (Iterator iter = jsonObj.keys(); iter.hasNext();) {    String key = (String) iter.next();    JSONArray array = jsonObj.getJSONArray(key);    for (int i = 0; i < array.size(); i++) {     JSONObject object = (JSONObject) array.get(i);     T t = (T) JSONObject.toBean(object, clazz);     if (t != null)      list.add(t);    }   }   return list;  }      public static void JsonToXML() {   JSONObject jsonObj = JSONObject.fromObject(jsonString);   XMLSerializer xmlSerializer = new XMLSerializer();   String xmlObject = xmlSerializer.write(jsonObj);   try {    Document document = DocumentHelper.parseText(xmlObject);    XMLWriter writer = new XMLWriter(new FileWriter(      "../json/src/demo2.xml"));    writer.write(document);    writer.close();   } catch (DocumentException e) {    e.printStackTrace();   } catch (IOException e) {    e.printStackTrace();   }   System.out.println(xmlObject);  }      public static void XMLToJson() {   XMLSerializer xmlSerializer = new XMLSerializer();   JSON json = xmlSerializer     .readFromFile(new File("src\\Dom2jSample.xml"));   System.out.println(json.toString());  }      public static void CreatXML() {   Demo demo = new Demo();   Document document = demo.createDocument();   /**    * way 1    */   try {    demo.FileWrite(document);   } catch (IOException e1) {    e1.printStackTrace();   }   // Element legend = demo.FindElement(document);   // System.out.println(legend.getText());   /**    * way 2    */   try {    Document documentStr = demo.StringToXML("<China>I Love!</China>");    demo.XMLWrite(documentStr);   } catch (Exception e) {   }  }        /*   * Create a XML Document   */  public Document createDocument() {   Document document = DocumentHelper.createDocument();   Element root = document.addElement("root");   Element author1 = root.addElement("Lynch");   author1.addAttribute("Age", "25");   author1.addAttribute("Country", "China");   author1.addText("I am great!");   Element author2 = root.addElement("Legend");   author2.addAttribute("Age", "25");   author2.addAttribute("Country", "China");   author2.addText("I am great!too!");   return document;  }        /*   * Create a XML document through String   */  public Document StringToXML(String str) throws DocumentException {   Document document = DocumentHelper.parseText(str);   return document;  }        public Element FindElement(Document document) {   Element root = document.getRootElement();   Element legend = null;   for (Iterator i = root.elementIterator("legend"); i.hasNext();) {    legend = (Element) i.next();   }   return legend;  }        /*   * Write a XML file   */  public void FileWrite(Document document) throws IOException {   FileWriter out = new FileWriter("../json/src/demo.xml");   document.write(out);   out.close();  }        /*   * Write a XML format file   */  public void XMLWrite(Document document) throws IOException {   XMLWriter writer = new XMLWriter(     new FileWriter("../json/src/demo2.xml"));   writer.write(document);   writer.close();  }  public static void main(String[] args) {   // List<Demo> list = JsonToList(new Demo(), Demo.class);   // for (Demo demo : list) {   // System.out.println(demo.getFirstName());   // }   // XMLToJson();   JsonToXML();   CreatXML();  } }