如何在正則表達(dá)式中使用ajax檢驗(yàn)注冊(cè)信息功能？相信很多沒有經(jīng)驗(yàn)的人對(duì)此束手無策，為此本文總結(jié)了問題出現(xiàn)的原因和解決方法，通過這篇文章希望你能解決這個(gè)問題。
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Entity層
該層主要包含一個(gè)用戶類User,代碼如下：
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重慶分公司
package cn.cpx.springmvc.entity;
import java.util.Date;
/**
* 用戶實(shí)體類
* @author autumn_leaf
*
*/
public class User {
private int uId;
private String uName;
private String uPwd;
private String uPhone;
private double uBalance;
private int uState;
private int uRole;
private String uImage;//用戶頭像
private Date uBirth;
public int getuId() {
return uId;
}
public void setuId(int uId) {
this.uId = uId;
}
public String getuName() {
return uName;
}
public void setuName(String uName) {
this.uName = uName;
}
public String getuPwd() {
return uPwd;
}
public void setuPwd(String uPwd) {
this.uPwd = uPwd;
}
public String getuPhone() {
return uPhone;
}
public void setuPhone(String uPhone) {
this.uPhone = uPhone;
}
public double getuBalance() {
return uBalance;
}
public void setuBalance(double uBalance) {
this.uBalance = uBalance;
}
public int getuState() {
return uState;
}
public void setuState(int uState) {
this.uState = uState;
}
public int getuRole() {
return uRole;
}
public void setuRole(int uRole) {
this.uRole = uRole;
}
public String getuImage() {
return uImage;
}
public void setuImage(String uImage) {
this.uImage = uImage;
}
public Date getuBirth() {
return uBirth;
}
public void setuBirth(Date uBirth) {
this.uBirth = uBirth;
}
public User(int uId, String uName, String uPwd, String uPhone, double uBalance, int uState, int uRole,String uImage,Date uBirth) {
super();
this.uId = uId;
this.uName = uName;
this.uPwd = uPwd;
this.uPhone = uPhone;
this.uBalance = uBalance;
this.uState = uState;
this.uRole = uRole;
this.uImage = uImage;
this.uBirth = uBirth;
}
public User() {
super();
}
public User(String uName, String uPwd, String uPhone) {
super();
this.uName = uName;
this.uPwd = uPwd;
this.uPhone = uPhone;
}
//添加注冊(cè)信息
public User(String uName, String uPwd, String uPhone, Date uBirth) {
super();
this.uName = uName;
this.uPwd = uPwd;
this.uPhone = uPhone;
this.uBirth = uBirth;
}
public User(String uName, String uPwd, String uPhone, String uImage) {
super();
this.uName = uName;
this.uPwd = uPwd;
this.uPhone = uPhone;
this.uImage = uImage;
}
public User(String uName, String uPwd) {
super();
this.uName = uName;
this.uPwd = uPwd;
}
@Override
public String toString() {
return "User [uId=" + uId + ", uName=" + uName + ", uPwd=" + uPwd + ", uPhone=" + uPhone + ", uBalance="
+ uBalance + ", uState=" + uState + ", uRole=" + uRole + ", uImage=" + uImage + ", uBirth=" + uBirth
+ "]";
}
}上述User類我們實(shí)際此次只會(huì)用到用戶名和密碼兩個(gè)屬性，其他屬性此次不會(huì)使用到。
Controller層
我們此次為操作方便，Dao層和Service層就不寫了，留給讀者自己去思考。我們新建UserController類，代碼如下：
package cn.cpx.springmvc.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import cn.cpx.springmvc.entity.User;
@Controller
@RequestMapping("/user")
public class UserController {
/**
* 根據(jù)輸入的用戶名查詢用戶名是否存在,實(shí)現(xiàn)前臺(tái)輸入用戶名及時(shí)驗(yàn)證
*/
@RequestMapping("/checkUname")
@ResponseBody
public String checkUname(User user) throws Exception {
//根據(jù)user(前臺(tái)輸入的用戶名)查詢數(shù)據(jù)庫中用戶名
//下面的判斷最好寫在Service中
//使用String result = userService.checkUname(user);
if("chen".equals(user.getuName())) {
return "{\"msg\":\"no\"}";
}
return "{\"msg\":\"ok\"}";
}
}加上@ResponseBody注解，是為了確保返回JSON形式的數(shù)據(jù)，我們返回列表形式的字符串，并進(jìn)行轉(zhuǎn)義，如果用戶名已經(jīng)存在(這里僅有chen)，則返回msg:no，相反，返回msg:ok。
視圖層
我們新建register.jsp,代碼如下：
