BeanUtils应用，tojavabean

package com.bochy.tojavabean;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.beanutils.locale.converters.DateLocaleConverter;

/**
* 封装的用户注册表单bean，用来接收register.jsp中的表单输入项的值
* RegisterFormBean中的属性与register.jsp中的表单输入项的name一一对应
* RegisterFormBean的职责除了负责接收register.jsp中的表单输入项的值之外还担任着校验表单输入项的值的合法性
*
* @author gacl
*
*/
public class RegisterFormBean {

// RegisterFormBean中的属性与register.jsp中的表单输入项的name一一对应
// <input type="text" name="userName"/>
private String userName;
// <input type="password" name="userPwd"/>
private String userPwd;
// <input type="password" name="confirmPwd"/>
private String confirmPwd;
// <input type="text" name="email"/>
private String email;
// <input type="text" name="birthday"/>
private String birthday;

@Override
public String toString() {
return "RegisterFormBean [userName=" + userName + ", userPwd="
+ userPwd + ", confirmPwd=" + confirmPwd + ", email=" + email
+ ", birthday=" + birthday + ", errors=" + errors + "]";
}

/**
* 存储校验不通过时给用户的错误提示信息
*/
private Map<String, String> errors = new HashMap<String, String>();

public Map<String, String> getErrors() {
return errors;
}

public void setErrors(Map<String, String> errors) {
this.errors = errors;
}

/*
* validate方法负责校验表单输入项 表单输入项校验规则： private String userName;
* 用户名不能为空，并且要是3-8的字母 abcdABcd private String userPwd; 密码不能为空，并且要是3-8的数字
* private String confirmPwd; 两次密码要一致 private String email;
* 可以为空，不为空要是一个合法的邮箱 private String birthday; 可以为空，不为空时，要是一个合法的日期
*/
public boolean validate() {

boolean isOk = true;

if (this.userName == null || this.userName.trim().equals("")) {
isOk = false;
errors.put("userName", "用户名不能为空！！");
} else {
if (!this.userName.matches("[a-zA-Z]{3,8}")) {
isOk = false;
errors.put("userName", "用户名必须是3-8位的字母！！");
}
}

if (this.userPwd == null || this.userPwd.trim().equals("")) {
isOk = false;
errors.put("userPwd", "密码不能为空！！");
} else {
if (!this.userPwd.matches("\\d{3,8}")) {
isOk = false;
errors.put("userPwd", "密码必须是3-8位的数字！！");
}
}

// private String password2; 两次密码要一致
if (this.confirmPwd != null) {
if (!this.confirmPwd.equals(this.userPwd)) {
isOk = false;
errors.put("confirmPwd", "两次密码不一致！！");
}
}

// private String email; 可以为空，不为空要是一个合法的邮箱
if (this.email != null && !this.email.trim().equals("")) {
if (!this.email.matches("\\w+@\\w+(\\.\\w+)+")) {
isOk = false;
errors.put("email", "邮箱不是一个合法邮箱！！");
}
}

// private String birthday; 可以为空，不为空时，要是一个合法的日期
if (this.birthday != null && !this.birthday.trim().equals("")) {
try {
DateLocaleConverter conver = new DateLocaleConverter();
conver.convert(this.birthday);
} catch (Exception e) {
isOk = false;
errors.put("birthday", "生日必须要是一个日期！！");
}
}

return isOk;
}

public String getUserName() {
return userName;
}

public void setUserName(String userName) {
this.userName = userName;
}

public String getUserPwd() {
return userPwd;
}

public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}

public String getConfirmPwd() {
return confirmPwd;
}

public void setConfirmPwd(String confirmPwd) {
this.confirmPwd = confirmPwd;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}

public String getBirthday() {
return birthday;
}

public void setBirthday(String birthday) {
this.birthday = birthday;
}
}

package com.bochy.tojavabean;

import java.io.Serializable;
import java.util.Date;

/**
* @author gacl 用户实体类
*/
public class User implements Serializable {

private static final long serialVersionUID = -4313782718477229465L;
private String test;
// 用户ID
private String id;
// 用户名
private String userName;
// 用户密码
private String userPwd;
// 用户邮箱
private String email;
// 用户生日
private Date birthday;

public String getId() {
return id;
}

public String getTest() {
return test;
}

public void setTest(String test) {
this.test = test;
}

public void setId(String id) {
this.id = id;
}

public String getUserName() {
return userName;
}

public void setUserName(String userName) {
this.userName = userName;
}

public String getUserPwd() {
return userPwd;
}

public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}

public Date getBirthday() {
return birthday;
}

public void setBirthday(Date birthday) {
this.birthday = birthday;
}

@Override
public String toString() {
return "User [test=" + test + ", id=" + id + ", userName=" + userName
+ ", userPwd=" + userPwd + ", email=" + email + ", birthday="
+ birthday + "]";
}
}

package com.bochy.tojavabean;

import java.util.Date;

import javax.servlet.http.HttpServlet;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.beanutils.locale.converters.DateLocaleConverter;

/**
* 处理用户注册的Servlet
*
* RegisterFormBean [userName=userName, userPwd=12345678, confirmPwd=null,
* email=1@234.com, birthday=Sun Oct 16 16:34:59 CST 2016, errors={}]
*
*
*
*/
public class RegisterServlet extends HttpServlet {

public static void main(String[] args) {
// 将客户端提交的表单数据封装到RegisterFormBean对象中
RegisterFormBean formbean = new RegisterFormBean();
formbean.setBirthday("2000-02-02");
formbean.setEmail("1@234.com");
formbean.setUserName("xlj");
formbean.setUserPwd("12345678");
User user = new User();
try {
BeanUtils.setProperty(formbean, "userName", "userName");
ConvertUtils.register(new DateLocaleConverter(), Date.class);
BeanUtils.copyProperties(user, formbean);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} // 把表单的数据填充到javabean中
System.out.println(user.toString());
}
}