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
