Spring PropertyEditor实现绑定时的类型转换
public class DataBinderTestModel{
private String username;
private boolean bool;//Boolean值测试
private PhoneNumberModel phoneNumber;//String->自定义对象的转换测试
private Date date;//日期类型测试
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public boolean isBool() {
return bool;
}
public void setBool(boolean bool) {
this.bool = bool;
}
public PhoneNumberModel getPhoneNumber() {
return phoneNumber;
}
public void setPhoneNumber(PhoneNumberModel phoneNumber) {
this.phoneNumber = phoneNumber;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
}
//如格式010-12345678
public class PhoneNumberModel {
private String areaCode;//区号
private String phoneNumber;//电话号码
public String getAreaCode() {
return areaCode;
}
public void setAreaCode(String areaCode) {
this.areaCode = areaCode;
}
public String getPhoneNumber() {
return phoneNumber;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
}
/**
* PropertyEditorSupport：一个PropertyEditor的支持类；
* setAsText：表示将String——>PhoneNumberModel，根据正则表达式进行转换，如果转换失败抛出异常，则接下来的验证器会进行验证处理；
* getAsText：表示将PhoneNumberModel——>String。
* @author thinkpad
*
*/
public class PhoneNumberEditor extends PropertyEditorSupport{
Pattern pattern = Pattern.compile("^(\\d{3,4})-(\\d{7,8})$");
@Override
public void setAsText(String text) throws IllegalArgumentException {
if(text == null || !StringUtils.hasLength(text)) {
setValue(null); //如果没值，设值为null
}
Matcher matcher = pattern.matcher(text);
if(matcher.matches()) {
PhoneNumberModel phoneNumber = new PhoneNumberModel();
phoneNumber.setAreaCode(matcher.group(1));
phoneNumber.setPhoneNumber(matcher.group(2));
setValue(phoneNumber);
} else {
throw new IllegalArgumentException(String.format("类型转换失败，需要格式[010-12345678]，但格式是[%s]", text));
}
}
@Override
public String getAsText() {
PhoneNumberModel phoneNumber = ((PhoneNumberModel)getValue());
return phoneNumber == null ? "" : phoneNumber.getAreaCode() + "-" + phoneNumber.getPhoneNumber();
}
}
/**
* initBinder:第一个扩展点，初始化数据绑定器，在此处我们注册了两个属性编辑器；
* CustomDateEditor：自定义的日期编辑器，用于在String<——>日期之间转换；
* binder.registerCustomEditor(Date.class, dateEditor)：表示如果命令对象是Date类型，则使用dateEditor进行类型转换；
* PhoneNumberEditor：自定义的电话号码属性编辑器用于在String<——> PhoneNumberModel之间转换；
* binder.registerCustomEditor(PhoneNumberModel.class, new PhoneNumberEditor())：表示如果命令对象是PhoneNumberModel类型，则使用PhoneNumberEditor进行类型转换；
* @author thinkpad
*
*/
@SuppressWarnings("deprecation")
public class DataBinderTestController extends AbstractCommandController {
public DataBinderTestController() {
setCommandClass(DataBinderTestModel.class); //设置命令对象
setCommandName("dataBinderTest");//设置命令对象的名字
}
@Override
protected ModelAndView handle(HttpServletRequest req, HttpServletResponse resp, Object command, BindException errors) throws Exception {
//输出command对象看看是否绑定正确
System.out.println(command);
return new ModelAndView("bindAndValidate/success").addObject("dataBinderTest", command);
}
@Override
protected void initBinder(HttpServletRequest request, ServletRequestDataBinder binder) throws Exception {
super.initBinder(request, binder);
//注册自定义的属性编辑器
//1、日期
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
CustomDateEditor dateEditor = new CustomDateEditor(df, true);
//表示如果命令对象有Date类型的属性，将使用该属性编辑器进行类型转换
binder.registerCustomEditor(Date.class, dateEditor);
//自定义的电话号码编辑器
binder.registerCustomEditor(PhoneNumberModel.class, new PhoneNumberEditor());
}
}
加bean：
<bean name="/dataBind" class="com.boventech.learning.controller.DataBinderTestController"/>
/bindAndValidate/success.jsp：
EL phoneNumber:${dataBinderTest.phoneNumber}<br/>
EL date:${dataBinderTest.date}<br/>
最后结果应该是：
EL phoneNumber:com.boventech.learning.entity.PhoneNumberModel@1bb8e19
EL date:Sun Mar 18 16:48:48 CST 2012
改改：
输入地址：
http://localhost:8080/E-learning/dataBind?username=sunhuwh&bool=yes&phoneNumber=010-12345678&date=2012-3-18%2016:48:48