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  • 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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  • 原文地址：https://www.cnblogs.com/wang-jing/p/4557150.html
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