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/**/" />

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