springmvc 孔浩
modelAttribute属性指定该form绑定的是哪个Model，当指定了对应的Model后就可以在form标签内部其
它表单标签上通过为path指定Model属性的名称来绑定Model中的数据了
重新整理
设定编码方式：放在web.xml中，设定为utf-8
<filter> <filter-name>CharacterFilter</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>CharacterFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
实现功能一：能正确返回welcome.html的页面，用<bean>
1、在eclipse中创建dynamic web project，注意第三个next中选择generate web.xml
2、导入dist下地包，导入commons-logging-1.1.3
3、web.xml
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
4、spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean name="/welcome.html" class="zttc.itat.controller.WelcomeController"></bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
注意：bean name 不要写成/welcome/html; property prefix 不要写成/WEB-INF/jsp
5、WelcomeController.java
public class WelcomeController extends AbstractController {
@Override
protected ModelAndView handleRequestInternal(HttpServletRequest req,
HttpServletResponse resp) throws Exception {
// TODO Auto-generated method stub
return new ModelAndView("welcome");
}
}
注意：继承AbstractController；放在zttc.itat.controller package下面
6、welcome.jsp
//简单地jsp页面
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <!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=ISO-8859-1"> <title>Insert title here</title> </head> <body> welcome! </body> </html>
实现功能二：开启注解，给controller传值，给view传值，rest风格
1、springmvc-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
//增加了这句
<context:component-scan base-package="zttc.itat.controller" />
<mvc:annotation-driven />
//删除了bean[name="/welcome.html"]
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
2、HelloController.java
package zttc.itat.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class HelloController {
@RequestMapping({"/hello","/"})
public ModelAndView hello(@RequestParam("username") String username){
ModelAndView mv = new ModelAndView();
mv.addObject("username", username);
mv.setViewName("hello");
return mv;
}
}
3、hello.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
//显示传来的值
${username}
</body>
</html>
实现功能三：用户管理系统，CRUD
展示用户信息
1、user.java
package zttc.itat.model;
public class User {
private String username;
private String nickname;
private String password;
private String email;
//构造函数没有返回类型
public User(){
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public User(String username, String nickname, String password, String email){
super();
this.username = username;
this.nickname = nickname;
this.password = password;
this.email = email;
}
}
2、UserController.java
package zttc.itat.controller; import java.util.HashMap; import java.util.Map; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.servlet.ModelAndView; import zttc.itat.model.User; @Controller
//路径会加上/user @RequestMapping("/user") public class UserController { private Map<String, User> users = new HashMap<String, User>(); public UserController(){ users.put("a", new User("a","aa","1","s")); users.put("b", new User("b","bb","2","f")); } @RequestMapping(value="/users", method=RequestMethod.GET) public ModelAndView list(){ ModelAndView mv = new ModelAndView(); mv.addObject("users", users); mv.setViewName("user/list"); return mv; } }
3、springmvc-servlet.xml，导入jsf-api，jsf-impl，jstl-1.2
使用jstl标签
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
4、list.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
//使用jstl需要添加的标示
<%@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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<c:forEach items="${users}" var="um">
${um.value.username }
--${um.value.nickname }
--${um.value.password }
--${um.value.email }<br />
</c:forEach>
</body>
</html>
添加用户
1、UserController.java
//首先，需要访问add.jsp页面，get方法。该页面使用了springmvc的form标签，所以需要加@ModelAttribute("user") User user，这样 可以通过form中的path对应到user得username属性
@RequestMapping(value="/add", method=RequestMethod.GET)
public String add(@ModelAttribute("user") User user){
return "user/add";
}
//其次，表单提交到当前页面，post方法。验证提交的数据，加入bean-validator，加入@Valid User user, BindingResult br，br一定要紧跟user；jsp页面也需要加入一定的error标签
@RequestMapping(value="/add", method=RequestMethod.POST)
public String add(@Valid User user, BindingResult br){
//如果出错
if(br.hasErrors()){
return "user/add";
}
users.put(user.getUsername(), user);
return "redirect:/user/users";
}
2、User.java
//验证的注解
@NotEmpty(message="用户名不能为空") public String getUsername() { return username; } @Size(min=1, max=10, message="长度1-10") public String getPassword() { return password; } @Email(message="格式不正确") public String getEmail() { return email; }
3、add.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
//使用springmvc form标签
<%@taglib prefix="sf" 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>Insert title here</title>
</head>
<body>
<sf:form method="post" modelAttribute="user">
//添加的出错提示
username:<sf:input path="username" /><sf:errors path="username" /><br />
nickname:<sf:input path="nickname" /><sf:errors path="nickname" /><br />
password:<sf:input path="password" /><sf:errors path="password" /><br />
email:<sf:input path="email" /><sf:errors path="email" /><br />
<input type="submit" value="add user" /><br />
</sf:form>
</body>
</html>
展示单个用户
1、UserController.java
//展示单个用户，show.jsp有form，需要传一个model，add是用过@ModelAttribute来指定；show使用ModelAndView来指定。@PathVariable来接收路径中得变量
@RequestMapping(value="/{username}", method=RequestMethod.GET)
public ModelAndView show(@PathVariable String username){
ModelAndView mv = new ModelAndView();
mv.addObject(users.get(username));
mv.setViewName("user/show");
return mv;
}
//返回json对象，添加jackson-all-1.9.4，只需return user就行，需要添加@ResponseBody
@RequestMapping(value="/{username}", method=RequestMethod.GET, params="json")
@ResponseBody
public User show(@PathVariable String username, String abc){
return users.get(username);
}
2、show.jsp
//跟add.jsp类似
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="sf" 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=ISO-8859-1"> <title>Insert title here</title> </head> <body> <sf:form method="post" modelAttribute="user"> username:${user.username }<br /> password:${user.password }<br /> nickname:${user.nickname }<br /> email:${user.email }<br /> </sf:form> </body> </html>
更新用户信息
1、UserController.java
@RequestMapping(value="/{username}/update", method=RequestMethod.GET)
public ModelAndView update(@PathVariable String username, @ModelAttribute("user") User user){
ModelAndView mv = new ModelAndView();
mv.addObject(users.get(username));
mv.setViewName("user/update");
return mv;
}
@RequestMapping(value="/{username}/update", method=RequestMethod.POST)
public String update(@PathVariable String username, @Valid User user, BindingResult br){
if(br.hasErrors()){
return "user/update";
}
users.put(username, user);
return "redirect:/user/users";
}
2、update.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@taglib prefix="sf" 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>Insert title here</title>
</head>
<body>
//给表单元素赋初值
<sf:form method="post" modelAttribute="user">
username:<sf:input path="username" value="${user.username}"/><sf:errors path="username" /><br />
nickname:<sf:input path="nickname" value="${user.nickname}"/><sf:errors path="nickname" /><br />
password:<sf:input path="password" value="${user.password}"/><sf:errors path="password" /><br />
email:<sf:input path="email" value="${user.email}"/><sf:errors path="email" /><br />
<input type="submit" value="update user" /><br />
</sf:form>
</body>
</html>
3、
--<a href="${um.value.username}/delete">delete</a>
删除用户
1、UserController.java
//ModelAndView setViewName 时可以增加 redirect 记得user前加/
@RequestMapping(value="/{username}/delete", method=RequestMethod.GET)
public ModelAndView delete(@PathVariable String username){
ModelAndView mv = new ModelAndView();
users.remove(username);
mv.setViewName("redirect:/user/users");
return mv;
}
2、list.jsp
--<a href="${um.value.username}/delete">delete</a>
登陆
1、UserException.java
//serial选第一个；右键 source generate constructor form superclass
package zttc.itat.model; public class UserException extends RuntimeException { /** * */ private static final long serialVersionUID = 1L; public UserException() { super(); // TODO Auto-generated constructor stub } public UserException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); // TODO Auto-generated constructor stub } public UserException(String message, Throwable cause) { super(message, cause); // TODO Auto-generated constructor stub } public UserException(String message) { super(message); // TODO Auto-generated constructor stub } public UserException(Throwable cause) { super(cause); // TODO Auto-generated constructor stub } }
2、UserController.java
@RequestMapping(value="/login", method=RequestMethod.POST)
public String login(String username, String password, HttpSession session){
if(!users.containsKey(username)){
throw new UserException("用户名不存在");
}
User u = users.get(username);
if(!u.getPassword().equals(password)){
throw new UserException("用户密码不正确");
}
//把登陆成功地用户存入session
session.setAttribute("loginUser", u);
return "redirect:/user/users";
}
//局部异常处理函数，只处理当前controller的异常
// @ExceptionHandler(value={UserException.class})
// public String handlerException(UserException e, HttpServletRequest req){
// req.setAttribute("e", e);
// return "error";
// }
3、springmvc-servlet.xml:全局异常处理
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <!-- 配置这个属性 --> <property name="exceptionMappings"> <props> <!-- 如果发现的是UserException，就到error页面 --> <prop key="zttc.itat.model.UserException">error</prop> </props> </property> </bean>
4、error.jsp 放在jsp下面
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!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>Insert title here</title>
</head>
<body>
//当前是全局异常处理，如果为局部异常处理的话是e
${exception.message }
</body>
</html>
5、login.jsp 放在webContent下面
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="user/login" method="POST">
Username:<input type="text" name="username"><br />
Password:<input type="text" name="password"><br />
<input type="submit" value="login" />
</body>
</html>
上传文件
1、add.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@taglib prefix="sf" 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>Insert title here</title>
</head>
<body>
//form一定要加enctype
<sf:form method="post" modelAttribute="user" enctype="multipart/form-data">
username:<sf:input path="username" /><sf:errors path="username" /><br />
nickname:<sf:input path="nickname" /><sf:errors path="nickname" /><br />
password:<sf:input path="password" /><sf:errors path="password" /><br />
email:<sf:input path="email" /><sf:errors path="email" /><br />
//增加了这个
file:<input type="file" name="attach" /><br />
<input type="submit" value="add user" /><br />
</sf:form>
</body>
</html>
2、springmvc-servlet.xml
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="5000000"></property> </bean>
3、UserController.java 在webContent下面建resources文件夹，导入commons-fileupload-1.2.2，commons-io-2.1
//修改了add方法
@RequestMapping(value="/add", method=RequestMethod.POST) public String add(@Valid User user, BindingResult br, @RequestParam MultipartFile attach, HttpServletRequest req) throws IOException{ if(br.hasErrors()){ return "user/add"; }
//不知道每个方法是做什么用的 String realpath = req.getSession().getServletContext().getRealPath("/resources/upload"); System.out.println(realpath); File f = new File(realpath+"/"+attach.getOriginalFilename()); FileUtils.copyInputStreamToFile(attach.getInputStream(), f); users.put(user.getUsername(), user); return "redirect:/user/users"; }
//上传多个文件
@RequestMapping(value="/add",method=RequestMethod.POST) public String add(@Valid User user, BindingResult br, @RequestParam MultipartFile[] attachs, HttpServletRequest req) throws IOException{ //一定要紧跟validate之后写验证结果类 if(br.hasErrors()){ return "user/add"; } String realpath = req.getSession().getServletContext().getRealPath("/resources/upload"); System.out.println(realpath); for(MultipartFile attach:attachs){ if(attach.isEmpty()) continue; File f = new File(realpath+"/"+attach.getOriginalFilename()); FileUtils.copyInputStreamToFile(attach.getInputStream(), f); } users.put(user.getUsername(), user); return "redirect:/user/users"; }
静态文件 可以直接访问
1、list.jsp 在resources中新建css文件夹
<link href="<%=request.getContextPath()%>/resources/css/style.css" rel="stylesheet" type="text/css"/>
2、springmvc-serlvet.xml
<mvc:resources location="/resources/" mapping="/resources/**/" />