假设有如下的输入界面：

    在上面输入abc,xyz模式的字符串，其中abc作为用户的用户名，xyz作为用户的密码，系统希望将上边的字符串转换成一个User实例。

     1、LoginAction.java

1: package cc.openhome;

2: import com.opensymphony.xwork2.Action;

3: import com.opensymphony.xwork2.ActionSupport;

4: public class LoginAction extends ActionSupport implements Action {

5:   private User user;

6:   private String tip;

7:

8:   public User getUser() {

9:     return user;

10:   }

11:

12:   public void setUser(User user) {

13:     this.user = user;

14:   }

15:

16:   public String getTip() {

17:     return tip;

18:   }

19:

20:   public void setTip(String tip) {

21:     this.tip = tip;

22:   }

23:

24:   public String execute() throws Exception {

25:     // TODO Auto-generated method stub

26:     if(getUser().getName().equals("nihao") && getUser().getPass().equals("ni")){

27:       setTip("转换成功");

28:       return SUCCESS;

29:     }else{

30:       System.out.println("失败！");

31:       setTip("失败成功");

32:       return ERROR;

33:     }

34:   }

35: }

    2、User.java

1: package cc.openhome;

2: public class User {

3:   private String name;

4:   private String pass;

5:   public String getName() {

6:     return name;

7:   }

8:   public void setName(String name) {

9:     this.name = name;

10:   }

11:   public String getPass() {

12:     return pass;

13:   }

14:   public void setPass(String pass) {

15:     this.pass = pass;

16:   }

17: }

    3、实现类型转换器UserConverter.java

1: package cc.openhome;

2: import java.util.Map;

3: import ognl.DefaultTypeConverter;

4: public class UserConverter extends DefaultTypeConverter {

5:   //类型转换器必须重写convertValue的方法，该方法需要完成双向转换。

6:   public Object convertFormString(Map context, String[] values, Class toType ){

7:     System.out.println("此方法执行了、、、、、、");

8:     //将需要将字符串向User类型转换时

9:     User user=new User();

10:     String[] userValue= values[0].split(",");

11:     user.setName(userValue[0]);

12:     user.setPass(userValue[1]);

13:     return user;

14:   }

15:   public String convertToString(Map context, Object o){

16:     User user=(User) o;

17:     return "<"+user.getName()+","+user.getPass()+">";

18:   }

19:

20: }

21:

    4、定义一个局部类型转换器

        建立一个文件LoginAction-conversion.properties，该文件由key-value对组成。

1: user=cc.openhome.UserConverter

    5、运行结果

    6、全局类型转换器

        假如输入页面变为如下：用户信息和客人信息要转换成User类型，生日参数要转换成Date类型。

     更新后的LoginAction.java

1: package cc.openhome;

2:

3: import java.util.Date;

4:

5: import com.opensymphony.xwork2.Action;

6: import com.opensymphony.xwork2.ActionSupport;

7: public class LoginAction extends ActionSupport implements Action {

8:   private User user;

9:   private String tip;

10:   private User customer;

11:   private Date birth;

12:   public User getCustomer() {

13:     return customer;

14:   }

15:   public void setCustomer(User customer) {

16:     this.customer = customer;

17:   }

18:   public Date getBirth() {

19:     return birth;

20:   }

21:   public void setBirth(Date birth) {

22:     this.birth = birth;

23:   }

24:   public User getUser() {

25:     return user;

26:   }

27:   public void setUser(User user) {

28:     this.user = user;

29:   }

30:   public String getTip() {

31:     return tip;

32:   }

33:   public void setTip(String tip) {

34:     this.tip = tip;

35:   }

36:   public String execute() throws Exception {

37:     // TODO Auto-generated method stub

38:     if(getUser().getName().equals("nihao") && getUser().getPass().equals("ni")){

39:       setTip("转换成功");

40:       return SUCCESS;

41:     }else{

42:       setTip("失败成功");

43:       return ERROR;

44:     }

45:   }

46: }

    7、提供全局转换器文件

    xwork-conversion.properties

1: cc.openhome.User=cc.openhome.UserConverter

    8、运行结果

        用户信息框输入scott，tiger ，客人信息输入框输入”abc,xyz”，在生日框中输入”2003-02-12”,则

当神已无能为力，那便是魔渡众生