java中如何防止bean的属性序列化为XML？
package org.nhooo.example.bean;
import java.beans.*;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;
public class BeanToXmlTransient {
private Long id;
private String itemName;
private String itemColour;
private Integer itemQuantities;
static {
try {
//在此块中将更改属性的类型
//itemQuantities为瞬态，因此不会序列化
//当我们使用XMLEncode将bean转换为xml时将其转换为xml
//持久性。
BeanInfo bi = Introspector.getBeanInfo(BeanToXmlTransient.class);
PropertyDescriptor[] pds = bi.getPropertyDescriptors();
for (int i = 0; i < pds.length; i++) {
PropertyDescriptor propertyDescriptor = pds[i];
if (propertyDescriptor.getName().equals("itemQuantities")) {
propertyDescriptor.setValue("transient", Boolean.TRUE);
}
}
} catch (IntrospectionException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
BeanToXmlTransient bean = new BeanToXmlTransient();
bean.setId(new Long(1));
bean.setItemName("T-Shirt");
bean.setItemColour("Dark Red");
bean.setItemQuantities(new Integer(100));
try {
XMLEncoder encoder = new XMLEncoder(new BufferedOutputStream(
new FileOutputStream("BeanTransient.xml")));
//将指定对象的XML表示形式写入
//输出。
encoder.writeObject(bean);
encoder.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
public String getItemColour() {
return itemColour;
}
public void setItemColour(String itemColour) {
this.itemColour = itemColour;
}
public Integer getItemQuantities() {
return itemQuantities;
}
public void setItemQuantities(Integer itemQuantities) {
this.itemQuantities = itemQuantities;
}
}在这里将看到该itemQuantities属性未序列化为XML。
<?xml version="1.0" encoding="UTF-8"?> <java version="1.6.0_02"> <object> <void property="id"> <long>1</long> </void> <void property="itemColour"> <string>Dark Red</string> </void> <void property="itemName"> <string>T-Shirt</string> </void> </object> </java>