SpringMVC学习第二天
增删改查的例子
3.添加用户
4.JSR303引入
5.修改、查看、删除
3.添加用户
UserController
package controller;
import java.util.HashMap;
import java.util.Map;
import model.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping("/user" )
public class UserController
{
private Map<String,User> users = new HashMap<String,User>();
public UserController() {
users.put("haha" ,new User("haha", "123","哈哈" ,"sss" ));
users.put("hehe" ,new User("haha", "123","呵呵 " ,"sss" ));
users.put("nimei" ,new User("haha","123" ,"你妹" ,"sss" ));
users.put("zhangquandan" ,new User("haha","张全蛋" ,"哈哈" ,"sss" ));
}
@RequestMapping(value= "/users",method=RequestMethod.GET)
public String list(Model model){
model.addAttribute("users" ,users );
return "user/list" ;
}
//链接到add页面时是GET请求，会访问这段代码
@RequestMapping(value= "/add",method=RequestMethod.GET)
public String add(Model model){
//开启modelDriven
model.addAttribute(new User());
return "user/add" ;
}
//在具体添加用户时，是post请求时，就访问以下代码
@RequestMapping(value= "/add",method=RequestMethod.POST)
public String add(User user){
users.put(user .getUserName(), user);
//UrlBasedViewResolver
return "redirect:/user/users" ;
}
}
UserController
第二种方式
package controller;
import java.util.HashMap;
import java.util.Map;
import model.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping("/user" )
public class UserController
{
private Map<String,User> users = new HashMap<String,User>();
public UserController() {
users.put("haha" ,new User("haha", "123","哈哈" ,"sss" ));
users.put("hehe" ,new User("haha", "123","呵呵 " ,"sss" ));
users.put("nimei" ,new User("haha","123" ,"你妹" ,"sss" ));
users.put("zhangquandan" ,new User("haha","张全蛋" ,"哈哈" ,"sss" ));
}
@RequestMapping(value= "/users",method=RequestMethod.GET)
public String list(Model model){
model.addAttribute("users" ,users );
return "user/list" ;
}
//链接到add页面时是GET请求，会访问这段代码
// @RequestMapping(value="/add",method=RequestMethod.GET)
// public String add(Model model){
// //开启modelDriven
// model.addAttribute(new User());
// return "user/add";
// }
@RequestMapping(value= "/add",method=RequestMethod.GET)
public String add( @ModelAttribute("user" ) User user){
return "user/add" ;
}
//在具体添加用户时，是post请求时，就访问以下代码
@RequestMapping(value= "/add",method=RequestMethod.POST)
public String add(User user,String abc ){
users.put(user .getUserName(), user);
//UrlBasedViewResolver
return "redirect:/user/users" ;
}
}
User
package model;
public class User
{
private String userName;
private String password;
private String nickName;
private String email;
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 getNickName() {
return nickName ;
}
public void setNickName(String nickName ) {
this.nickName = nickName;
}
public String getEmail() {
return email ;
}
public void setEmail(String email ) {
this.email = email;
}
public User() {
}
public User(String userName, String password , String nickName, String email ) {
this.userName = userName;
this.password = password;
this.nickName = nickName;
this.email = email;
}
}
web.xml
<?xml version="1.0" encoding= "UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name >SpringMvc1</ display-name> <servlet > <servlet-name> spring</servlet-name > <servlet-class> org.springframework.web.servlet.DispatcherServlet</servlet-class > <load-on-startup> 1</ load-on-startup> </servlet > <servlet-mapping > <servlet-name> spring</servlet-name > <url-pattern> /</ url-pattern> </servlet-mapping > <!-- 字符过滤器 --> <filter > <filter-name >encodingFilter</ filter-name> <filter-class> org.springframework.web.filter.CharacterEncodingFilter </filter-class> <init-param > <param-name >encoding</ param-name> <param-value >UTF-8</ param-value> </init-param > </filter > <filter-mapping > <filter-name >encodingFilter</ filter-name> <url-pattern >/*</ url-pattern> </filter-mapping > </web-app>
list.jsp
<%@ page language= "java" contentType ="text/html; charset=utf-8"
pageEncoding="utf-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title> 用户列表</title >
</head>
<body>
<a href="add" >添加</ a>
<br/>
<c:forEach var="user" items=" ${users }">
${user.value.userName } --
${user.value.password } --
${user.value.nickName } --
${user.value.email } <br/>
</c:forEach >
</body>
</html>
add.jsp
<%@ page language= "java" contentType ="text/html; charset=utf-8" pageEncoding="utf-8" %> <!-- the form tag --> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" > <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title> 用户列表</title > </head> <body> <!-- 此时没有写action,直接提交会提交给/add --> <form:form method="post" modelAttribute="user" > 用户名: <form:input path="userName" /><br/> 密码: <form:password path="password" /><br/> 真实姓名: <form:input path="nickName" /><br/> Email: <form:input path="email" /><br/> <input type="submit" value="添加用户"> </form:form > </body> </html>
4.JSR 303的引入
User
package model;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotEmpty;
public class User
{
private String userName;
private String password;
private String nickName;
private String email;
@NotEmpty(message= "用户名不能为空" )
public String getUserName() {
return userName ;
}
public void setUserName(String userName ) {
this.userName = userName;
}
@Size(min=1,max=10,message= "密码的长度应该在1和10之间" )
public String getPassword() {
return password ;
}
public void setPassword(String password ) {
this.password = password;
}
public String getNickName() {
return nickName ;
}
public void setNickName(String nickName ) {
this.nickName = nickName;
}
@Email(message= "邮箱的格式不正确" )
public String getEmail() {
return email ;
}
public void setEmail(String email ) {
this.email = email;
}
public User() {
}
public User(String userName, String password , String nickName, String email ) {
this.userName = userName;
this.password = password;
this.nickName = nickName;
this.email = email;
}
}
UserController
package controller;
import java.util.HashMap;
import java.util.Map;
import model.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping("/user" )
public class UserController
{
private Map<String,User> users = new HashMap<String,User>();
public UserController() {
users.put("haha" ,new User("haha", "123","哈哈" ,"sss" ));
users.put("hehe" ,new User("haha", "123","呵呵 " ,"sss" ));
users.put("nimei" ,new User("haha","123" ,"你妹" ,"sss" ));
users.put("zhangquandan" ,new User("haha","张全蛋" ,"哈哈" ,"sss" ));
}
@RequestMapping(value= "/users",method=RequestMethod. GET)
public String list(Model model){
model.addAttribute("users" ,users );
return "user/list" ;
}
//链接到add页面时是GET请求，会访问这段代码
// @RequestMapping(value="/add",method=RequestMethod.GET)
// public String add(Model model){
// //开启modelDriven
// model.addAttribute(new User());
// return "user/add";
// }
@RequestMapping(value= "/add",method=RequestMethod. GET)
public String add( @ModelAttribute("user" ) User user){
return "user/add" ;
}
//在具体添加用户时，是post请求时，就访问以下代码
@RequestMapping(value= "/add",method=RequestMethod. POST)
public String add( @Validated User user,BindingResult br ){//一定要紧跟validated之后写验证结果类
if(br .hasErrors())
{
//如果有错误直接返回页面
return "user/add" ;
}
users.put(user .getUserName(), user);
//UrlBasedViewResolver接口
return "redirect:/user/users" ;
}
}
list.jsp
<%@ page language= "java" contentType ="text/html; charset=utf-8"
pageEncoding="utf-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title> 用户列表</title >
</head>
<body>
<a href="add" >添加</ a>
<br/>
<c:forEach var="user" items=" ${users }">
${user.value.userName } --
${user.value.password } --
${user.value.nickName } --
${user.value.email } <br/>
</c:forEach >
</body>
</html>
add.jsp
<%@ page language= "java" contentType ="text/html; charset=utf-8" pageEncoding="utf-8" %> <!-- the form tag --> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" > <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title> 用户列表</title > </head> <body> <!-- 此时没有写action,直接提交会提交给/add --> <form:form method="post" modelAttribute="user" > 用户名: <form:input path="userName" /><form:errors path="userName" ></form:errors>< br/> 密码: <form:password path="password" /><form:errors path="password" ></form:errors>< br/> 真实姓名: <form:input path="nickName" /><br/> Email: <form:input path="email" /><form:errors path="email" ></form:errors>< br/> <input type="submit" value="添加用户"> </form:form > </body> </html>
源码：http://pan.baidu.com/s/1ntE6Lwl
5.修改，查看，删除
UserController
package controller;
import java.util.HashMap;
import java.util.Map;
import model.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping ("/user" )
public class UserController
{
private Map<String,User> users = new HashMap<String,User>();
public UserController() {
users .put("haha" , new User("haha" ,"haha" ,"哈哈" ,"sss" ));
users .put("hehe" , new User("hehe" ,"hehe" ,"呵呵 " ,"sss" ));
users .put("nimei" , new User("nimei" ,"nimei" ,"你妹" ,"sss" ));
users .put("zhangquandan" , new User("zhangquandan" ,"张全蛋" ,"哈哈" ,"sss" ));
}
/**
* 遍历用户
* @param model
* @return
*/
@RequestMapping(value= "/users" ,method=RequestMethod. GET)
public String list(Model model ){
model .addAttribute("users" ,users );
return "user/list" ;
}
//链接到add页面时是GET请求，会访问这段代码
// @RequestMapping(value="/add",method=RequestMethod.GET)
// public String add(Model model){
// //开启modelDriven
// model.addAttribute(new User());
// return "user/add";
// }
/**
* 进入添加页面
* @param user
* @return
*/
@RequestMapping(value= "/add" ,method=RequestMethod. GET)
public String add( @ModelAttribute ("user" ) User user ){
return "user/add" ;
}
/**
* 添加用户
* @param user
* @param br
* @return
*/
//在具体添加用户时，是post请求时，就访问以下代码
@RequestMapping(value= "/add" ,method=RequestMethod. POST)
public String add( @Validated User user ,BindingResult br ){//一定要紧跟validated之后写验证结果类
if (br .hasErrors())
{
//如果有错误直接返回页面
return "user/add" ;
}
users .put(user .getUserName(), user);
//UrlBasedViewResolver接口
return "redirect:/user/users" ;
}
/**
* 查看用户详细信息
* @param userName
* @param model
* @return
*/
@RequestMapping(value= "/{userName}" ,method=RequestMethod. GET)
public String show( @PathVariable String userName ,Model model )
{
model .addAttribute(users .get( userName));
return "user/show" ;
}
/**
* 进入修改页面
* @param userName
* @param model
* @return
*/
@RequestMapping(value= "/{userName}/update" ,method=RequestMethod. GET)
public String update( @PathVariable String userName ,Model model )
{
model .addAttribute(users .get( userName));
return "user/update" ;
}
/**
* 修改用户数据
* @param user
* @param userName
* @param br
* @return
*/
@RequestMapping(value= "/{userName}/update" ,method=RequestMethod. POST)
public String udpate( @PathVariable String userName ,@Validated Useruser,BindingResult br)
{
if (br .hasErrors())
{
return "user/update" ;
}
users .put(userName ,user );
return "redirect:/user/users" ;
}
@RequestMapping(value= "/{userName}/delete" ,method=RequestMethod. GET)
public String delete( @PathVariable String userName )
{
users .remove(userName );
return "redirect:/user/users" ;
}
}
User
package model;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotEmpty;
public class User
{
private String userName ;
private String password ;
private String nickName ;
private String email ;
@NotEmpty(message= "用户名不能为空" )
public String getUserName() {
return userName ;
}
public void setUserName(String userName ) {
this .userName = userName;
}
@Size(min=1,max=10,message= "密码的长度应该在1和10之间" )
public String getPassword() {
return password ;
}
public void setPassword(String password ) {
this .password = password;
}
public String getNickName() {
return nickName ;
}
public void setNickName(String nickName ) {
this .nickName = nickName;
}
@Email(message= "邮箱的格式不正确" )
public String getEmail() {
return email ;
}
public void setEmail(String email ) {
this .email = email;
}
public User() {
}
public User(String userName , String password , String nickName , String email ) {
this .userName = userName;
this .password = password;
this .nickName = nickName;
this .email = email;
}
}
list.jsp
<%@ page language= "java" contentType = "text/html; charset=utf-8"
pageEncoding ="utf-8" %>
<%@ taglib prefix= "c" uri ="http://java.sun.com/jsp/jstl/core" %>
<! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd" >
< html>
< head>
< meta http-equiv ="Content-Type" content= "text/html; charset=utf-8">
< title> 用户列表 </title >
</ head>
< body>
< a href ="add" > 添加</ a >
< br/>
<c:forEach var= "user" items =" ${users } ">
${user.value.userName } --
${user.value.password } --
< a href =" ${user.value.userName }" >${user.value.nickName } </ a> --
${user.value.email }
< a href =" ${user.value.userName }/update" >修改 </ a>
< a href =" ${user.value.userName }/delete" >删除 </ a>
< br/>
</c:forEach >
</ body>
</ html>
add.jsp
<%@ page language= "java" contentType = "text/html; charset=utf-8" pageEncoding ="utf-8" %> <!-- the form tag --> <%@ taglib prefix= "form" uri ="http://www.springframework.org/tags/form" %> <! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd" > < html> < head> < meta http-equiv ="Content-Type" content= "text/html; charset=utf-8"> < title> 用户列表 </title > </ head> < body> <!-- 此时没有写action,直接提交会提交给/add --> <form:form method= "post" modelAttribute ="user" > 用户名: < form:input path ="userName" />< form:errors path ="userName" ></ form:errors>< br /> 密码: < form:password path ="password" />< form:errors path ="password" ></ form:errors>< br /> 真实姓名: < form:input path ="nickName" />< br/> Email: < form:input path ="email" />< form:errors path ="email" ></ form:errors>< br /> < input type ="submit" value= "添加用户" > </form:form > </ body> </ html>
show.jsp
<%@ page language= "java" contentType = "text/html; charset=utf-8"
pageEncoding ="utf-8" %>
<!-- the form tag -->
<%@ taglib prefix= "form" uri ="http://www.springframework.org/tags/form" %>
<! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd" >
< html>
< head>
< meta http-equiv ="Content-Type" content= "text/html; charset=utf-8">
< title> 用户列表 </title >
</ head>
< body>
<!-- 此时没有写action,直接提交会提交给/add -->
用户名:${user.userName } < br/>
密码:${user.password } < br/>
真实姓名:${user.nickName } < br/>
email:${user.email } < br/>
</ body>
</ html>
update.jsp
<%@ page language= "java" contentType = "text/html; charset=utf-8" pageEncoding ="utf-8" %> <!-- the form tag --> <%@ taglib prefix= "form" uri ="http://www.springframework.org/tags/form" %> <! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd" > < html> < head> < meta http-equiv ="Content-Type" content= "text/html; charset=utf-8"> < title> 用户列表 </title > </ head> < body> <!-- 此时没有写action,直接提交会提交给/add --> <form:form method= "post" modelAttribute ="user" > 用户名: < form:input path ="userName" />< form:errors path ="userName" ></ form:errors>< br /> 密码: < form:password path ="password" />< form:errors path ="password" ></ form:errors>< br /> 真实姓名: < form:input path ="nickName" />< br/> Email: < form:input path ="email" />< form:errors path ="email" ></ form:errors>< br /> < input type ="submit" value= "修改用户" > </form:form > </ body> </ html>
源码:http://pan.baidu.com/s/1kTkOEbX