Code example for XStream to implement mutual conversion between Bean and xml

II. important annotations @ XStreamAlias alias @ XStreamAsAttribute is defined as attribute @ XStreamOmitField ignore @ XStreamConverter processing date format @ XStreamImplicit (itemFieldName & quot; roles & quot ;) process List 1. import jar packages

 
  
   com.thoughtworks.xstream
  xstream
  
   1.4.8
  
 

II. Important Notes

@ XStreamAlias defines the alias

@ XStreamAsAttribute is defined as an attribute.

@ XStreamOmitField ignore

@ XStreamConverter processing date format

@ XStreamImplicit (itemFieldName = "roles") process List

III. instances

1. define JavaBean

import java.util.Date;import java.util.List;import com.thoughtworks.xstream.annotations.XStreamAlias;import com.thoughtworks.xstream.annotations.XStreamAsAttribute;import com.thoughtworks.xstream.annotations.XStreamConverter;import com.thoughtworks.xstream.annotations.XStreamImplicit;import com.thoughtworks.xstream.annotations.XStreamOmitField;import com.tzz.util.xml.DateConverter;@XStreamAlias("user")public class User {@XStreamAsAttributeprivate Integer id;private String name;@XStreamOmitFieldprivate int age;private String sex;@XStreamConverter(value = DateConverter.class)private Date birthday = new Date();@XStreamImplicit(itemFieldName = "roles")private List
 
   roles;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public List
  
    getRoles() {return roles;}public void setRoles(List
   
     roles) {this.roles = roles;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}}
   
  
 

import com.thoughtworks.xstream.annotations.XStreamAlias;@XStreamAlias("role")public class Role {private Integer id;private String name;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}}

2. conversion tool

Import java. io. writer; import java. util. arrayList; import java. util. hashMap; import java. util. list; import java. util. map; import java. util. set; import org. dom4j. element; import com. thoughtworks. xstream. XStream; import com. thoughtworks. xstream. core. util. quickWriter; import com. thoughtworks. xstream. io. hierarchicalStreamWriter; import com. thoughtworks. xstream. io. xml. prettyPrintWriter; import com. thoughtworks. xstream. io. xml. xppDriver; public class XStreamXmlUtil {/** XML to Bean object */@ SuppressWarnings ("unchecked") public static
 
  
T xmlToBean (String xml, Class
  
   
Clazz) {XStream xstream = new XStream (); xstream. registerConverter (new DateConverter (); xstream. autodetectAnnotations (true); xstream. processAnnotations (clazz); xstream. setClassLoader (clazz. getClassLoader (); return (T) xstream. fromXML (xml);}/** convert Bean Object to XML */public static String beanToXml (Object bean) {// return"
   "+ New XStream (). toXML (bean); XStream xstream = new XStream (); xstream. registerConverter (new DateConverter (); xstream. autodetectAnnotations (true); return xstream. toXML (bean );}}
  
 

3. test class

Import java. util. arrayList; import java. util. date; import java. util. list; import org. junit. test; import com. tzz. test. util. xml. entity. role; import com. tzz. test. util. xml. entity. user; import com. tzz. util. xml. XStreamXmlUtil; public class TestXStreamXmlUtil {@ Testpublic void testBeanToXml () {try {User user = new User (); user. setId (1); user. setName ("Test"); user. setAge (20); user. setSex ("1"); user. setBirthday (new Date (); Role role = new Role (); role. setId (1); role. setName ("Role 1"); Role role2 = new Role (); role2.setId (2); role2.setName ("Role 2"); List
 
  
Roles = new ArrayList
  
   
(); Roles. add (role); roles. add (role2); user. setRoles (roles); String xml = XStreamXmlUtil. beanToXml (user); System. out. println (xml);} catch (Exception e) {e. printStackTrace () ;}@ Testpublic void testXmlToBean () {String xml ="
   
    
"+"
    
     
Test
    "+"
    
     
1
    "+"
    
     
16:12:46
    "+"
    
     
"+"
     
      
1
     "+"
     
      
Role 1
     "+"
    "+"
    
     
"+"
     
      
2
     "+"
     
      
Role 2
     "+"
    "+"
   "; User user = XStreamXmlUtil. xmlToBean (xml, User. class); System. out. println (user. getId () +" -- "+ user. getName (); List
   
    
Roles = user. getRoles (); for (Role r: roles) {System. out. println (r. getName ());}}}
   
  
 

4. test results

4.1 run the testBeanToXml method

   
  
   
Test
    
  
   
1
    
  
   
17:35:41
    
      
   
    
1
       
   
    
Role 1
     
    
      
   
    
2
       
   
    
Role 2
     
  
 

4.2 run the testXmlToBean method

1 -- Test role 1 role 2

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