（四）用户注册

    步骤实现:
        1.在index.jsp上点击 注册页面 跳转到register.jsp（不采用）
        2.点击注册 
            <a href="/store/user?method=registUI"></a>
            
        3.在userservlet中编写一个registUI 方法
            请求转发到 register.jsp即可.
　　
　　完成注册：

        1.regist
            封装数据
                设置id
                设置state
                设置code
            调用service 完成注册操作
            请求转发 /jsp/msg.jsp
        2.userservice中的service
            调用dao
            发送激活邮件
        3.userdao dao 添加一条数据

1、<!--/store/WebContent/jsp/index.jsp -- >
<li><a href="${pageContext.request.contextPath}/user?method=registUI">注册</a></li>
2、<!--/store/WebContent/jsp/register.jsp-->
<form class="form-horizontal" style="margin-top:5px;" action="${pageContext.request.contextPath }/user?method=regist" method="post">
3、增加name属性

作用：解决乱码问题
还需要在web.xml中配置

package com.louis.web.filter;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;
/**
 * 统一编码
 * @author Administrator
 *
 */
public class EncodingFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // TODO Auto-generated method stub

    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException {
        //1.强转
        HttpServletRequest request=(HttpServletRequest) req;
        HttpServletResponse response=(HttpServletResponse) resp;
        
        //2.放行
        chain.doFilter(new MyRequest(request), response);
    }

    @Override
    public void destroy() {
        // TODO Auto-generated method stub

    }

}
class MyRequest extends HttpServletRequestWrapper{
    private HttpServletRequest request;
    private boolean flag=true;
    
    
    public MyRequest(HttpServletRequest request) {
        super(request);
        this.request=request;
    }
    
    @Override
    public String getParameter(String name) {  
        if(name==null || name.trim().length()==0){
            return null;
        }
        String[] values = getParameterValues(name);
        if(values==null || values.length==0){
            return null;
        }
        
        return values[0];
    }
    
    @Override
    /**
     * hobby=[eat,drink]
     */
    public String[] getParameterValues(String name) {
        if(name==null || name.trim().length()==0){
            return null;
        }
        Map<String, String[]> map = getParameterMap();
        if(map==null || map.size()==0){
            return null;
        }
        
        return map.get(name);
    }
    
    @Override
    /**
     * map{ username=[tom],password=[123],hobby=[eat,drink]}
     */
    public Map<String,String[]> getParameterMap() {  
        
        /**
         * 首先判断请求方式
         * 若为post  request.setchar...(utf-8)
         * 若为get 将map中的值遍历编码就可以了
         */
        String method = request.getMethod();
        if("post".equalsIgnoreCase(method)){
            try {
                request.setCharacterEncoding("utf-8");
                return request.getParameterMap();
            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }else if("get".equalsIgnoreCase(method)){
            Map<String,String[]> map = request.getParameterMap();
            if(flag){
                for (String key:map.keySet()) {
                    String[] arr = map.get(key);
                    //继续遍历数组
                    for(int i=0;i<arr.length;i++){
                        //编码
                        try {
                            arr[i]=new String(arr[i].getBytes("iso8859-1"),"utf-8");
                        } catch (UnsupportedEncodingException e) {
                            e.printStackTrace();
                        }
                    }
                }
                flag=false;
            }
            //需要遍历map 修改value的每一个数据的编码
            
            return map;
        }
        
        return super.getParameterMap();
    }
    
}

    <filter>
        <filter-name>EncodingFilter</filter-name>
        <filter-class>com.louis.web.filter.EncodingFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>EncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

package com.louis.web.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 和用户相关的servlet
 */

public class UserServlet extends BaseServlet {
    
    
    public String add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.out.println("userServlet的add方法执行了");
        return null;
    }
    
　　/*跳转到注册页面*/
    public String registUI(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
        return "/jsp/register.jsp";
    }
　　
　　

}

package com.louis.web.servlet;

import java.io.IOException;
import java.util.Date;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.ConvertUtils;

import com.louis.domain.User;
import com.louis.myconvertor.MyConverter;
import com.louis.service.UserService;
import com.louis.service.impl.UserServiceImpl;
import com.louis.utils.UUIDUtils;

/**
 * 和用户相关的servlet
 */

public class UserServlet extends BaseServlet {
    
    
    public String add(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        System.out.println("userServlet的add方法执行了");
        return null;
    }
    //调转到注册页面
    public String registUI(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        return "/jsp/register.jsp";
    }
    
    //完成注册
    public String regist(HttpServletRequest request,HttpServletResponse response) throws Exception {
        //1封装数据
        User user = new User();
        
        //注册自定义转化器
        ConvertUtils.register(new MyConverter(), Date.class);
        
        BeanUtils.populate(user, request.getParameterMap());
        
        //1.1设置用户id
        user.setUid(UUIDUtils.getId());
        
        //1.2设置激活码
        user.setCode(UUIDUtils.getCode());
        
        
        //2调用service完成注册
        UserService service = new UserServiceImpl();
        service.regist(user);
        
        
        //页面请求转发
        request.setAttribute("msg", "用户已注册，请去邮箱激活");
        return "/jsp/msg.jsp";
    }

}

package com.louis.domain;

import java.util.Date;

public class User {
    /**
     * 
     */
    private String uid;
    private String username;
    private String password;

    private String name;
    private String email;
    private String telephone;

    private Date birthday;
    private String sex;
    private Integer state = 0;// 激活状态 1:激活 0:未激活
    private String code;

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getEmail() {
        return email;
    }

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

    public String getTelephone() {
        return telephone;
    }

    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }

    public Date getBirthday() {
        return birthday;
    }

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

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public Integer getState() {
        return state;
    }

    public void setState(Integer state) {
        this.state = state;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

}

见链接：http://pan.baidu.com/s/1pLjyrwf 密码：s57t

注意：
　　　　封装数据的时候报了一个错误
        是因为 字符串装成时间类型的是出现错误
            BeanUtils不支持字符串装成时间
解决方案:
        自定义转化器
            1.编写一个类 实现Conventer接口
            2.实现方法
                convert(转换成的类型,前台页面传入的字符串)
            3.注册转化器 在封装数据之前注册
                ConvertUtils.register(new MyConventer(), Date.class);