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SpringMVC(二)

SpringMVC注解方式
   1.常用注解：
       名称               说明
       @Controller       指明某个类是一个Controller
       @RequestMapping   请求路径的映射，可以配置在类或者方法上面
       @RequestParam   配置在方法的参数前面，指明从request中获取指定的值并注入到参数中
       @PathVariable   指明从请求的地址的中获取配置项来注入到方法的参数中

   2.使用注解完成用户登录
       a.在所需要的Controller中标注@Controller
       b.在dispatcherServlet-servlet.xml配置
           1)配置视图解析器
           2)配置需要扫描的包
           3)启动SpringMVC注解扫描

   3.REST风格
       a.Representational State Transfer表述性状态转移
       b.传统的查、改、删的URL与REST风格的增删改URL对比
           /userview.action?id=12    <-->   /user/12
           /userdelete.action?id=12 <-->   /user/delete/12
           /userupdate.action?id=12 <-->   /user/update/12
       c.请求方式
           GET、POST、DELETE、PUT
       d.他强调的是一个资源可以对应多种视图

   4.JSR-303验证
       a.使用注解完成实体类的验证
           1)需要导入hibernate-validator验证所需jar包
           2)在实体类上配置验证注解
               @NotEmpty
               @Range
               @Length
               @Pattern
               @Valid
       b.DispatcherServlet
           1)Handler
               @Controller
               @RequestMapping（value、method、params）
               @PathVariable
               @RequestParam
               @ResponseBody
           2)方法的返回值
               ModelAndView
               View
               Model
               String
               Object
               void

访问静态文件
   在SpringMVC中配置了拦截地址为 / 时，拦截所有请求,静态资源（图片、外部样式、外部JS）都会被拦截
   解决方案：使用<mvc:resources/>排除静态资源拦截

返回JSON数据
   1.步骤：
       a.导入jar包：jackson-all-1.9.11.jar
       b.@RequestMapping(value="/{username}",method=RequestMethod.GET,params="json")
       c.@ResponseBody

范例：
1.entity包
a.User

 1 package com.Elastic.SpringMVCDemo2.ivy.entity;
 2 
 3 import java.io.Serializable;
 4 
 5 public class User implements Serializable {
 6     private String name;
 7     private String pass;
 8 
 9     public String getName() {
10         return name;
11     }
12 
13     public void setName(String name) {
14         this.name = name;
15     }
16 
17     public String getPass() {
18         return pass;
19     }
20 
21     public void setPass(String pass) {
22         this.pass = pass;
23     }
24 }

2.controller包
a1.UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.bind.annotation.RequestMethod;
 6 import org.springframework.web.bind.annotation.RequestParam;
 7 import org.springframework.web.servlet.ModelAndView;
 8 
 9 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
10 
11 @Controller
12 public class UserController {
13     /**
14      * 访问登录页面
15      * @return
16      */
17     @RequestMapping("/login")
18     public ModelAndView login() {
19         return new ModelAndView("login");
20     }
21     
22     @RequestMapping("/doLogin")
23     public ModelAndView doLogin(User user, String code) {
24         System.out.println(user.getName());
25         System.out.println(code);
26         return new ModelAndView("index");
27     }
28 }

a2.jsp中name与controller中参数名不同时 -- UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.bind.annotation.RequestMethod;
 6 import org.springframework.web.bind.annotation.RequestParam;
 7 import org.springframework.web.servlet.ModelAndView;
 8 
 9 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
10 
11 @Controller
12 public class UserController {
13     /**
14      * 访问登录页面
15      * @return
16      */
17     @RequestMapping("/login")
18     public ModelAndView login() {
19         return new ModelAndView("login");
20     }
21     
22     @RequestMapping("/doLogin")
23     public ModelAndView doLogin(@RequestParam(value="name1", required=false) String name1, String pass) {
24         System.out.println(name1);
25         return new ModelAndView("index");
26     }
27     
28 }

a3.required=false和defaultValue="asd"属性常用在分页 -- UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.bind.annotation.RequestMethod;
 6 import org.springframework.web.bind.annotation.RequestParam;
 7 import org.springframework.web.servlet.ModelAndView;
 8 
 9 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
10 
11 @Controller
12 public class UserController {
13     /**
14      * 访问登录页面
15      * @return
16      */
17     @RequestMapping("/login")
18     public ModelAndView login() {
19         return new ModelAndView("login");
20     }
21     
22     @RequestMapping("/doLogin")
23     public ModelAndView doLogin(@RequestParam(defaultValue="asd", required=false) String name1, String pass) {
24         System.out.println(name1);
25         return new ModelAndView("index");
26     }
27     
28 }

a4.方法重载 -- UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 import org.springframework.web.bind.annotation.RequestMethod;
 6 import org.springframework.web.bind.annotation.RequestParam;
 7 import org.springframework.web.servlet.ModelAndView;
 8 
 9 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
10 
11 @Controller
12 public class UserController {
13     /**
14      * 访问登录页面
15      * @return
16      */
17     @RequestMapping(value="/login",method=RequestMethod.GET)
18     public ModelAndView login() {
19         return new ModelAndView("login");
20     }
21     
22     @RequestMapping(value="/login",method=RequestMethod.POST)
23     public ModelAndView login(User user, String code) {
24         System.out.println(user.getName());
25         System.out.println(code);
26         return new ModelAndView("index");
27     }
28 }

a5.增删查改 + 多参 -- UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import javax.websocket.server.PathParam;
 4 
 5 import org.springframework.stereotype.Controller;
 6 import org.springframework.web.bind.annotation.PathVariable;
 7 import org.springframework.web.bind.annotation.RequestMapping;
 8 import org.springframework.web.bind.annotation.RequestMethod;
 9 import org.springframework.web.bind.annotation.RequestParam;
10 import org.springframework.web.servlet.ModelAndView;
11 
12 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
13 
14 @Controller
15 public class UserController {
16     @RequestMapping(value="/delete/{id}")
17     public ModelAndView delete(@PathVariable(value="id") String name) {
18         System.out.println("执行删除");
19         System.out.println(name);
20         return new ModelAndView("index");
21     }
22 
23     /*@RequestMapping(value="/delete/{id}/{name}")
24     public ModelAndView delete(@PathVariable String id,@PathVariable String name) {
25         System.out.println("执行删除");
26         System.out.println(id);
27         System.out.println(name);
28         return new ModelAndView("index");
29     }*/
30     
31     @RequestMapping(value="/delete/{id}/{name}")
32     public ModelAndView search(String name,String sex,int age) {
33         System.out.println("执行搜索");
34         return new ModelAndView("list");
35     }
36 }

a6.页面显示信息 -- UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import javax.websocket.server.PathParam;
 4 
 5 import org.springframework.stereotype.Controller;
 6 import org.springframework.ui.Model;
 7 import org.springframework.ui.ModelMap;
 8 import org.springframework.web.bind.annotation.PathVariable;
 9 import org.springframework.web.bind.annotation.RequestMapping;
10 import org.springframework.web.bind.annotation.RequestMethod;
11 import org.springframework.web.bind.annotation.RequestParam;
12 import org.springframework.web.servlet.ModelAndView;
13 
14 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
15 
16 @Controller
17 public class UserController {
18     /**
19      * 访问登录页面
20      * @return
21      */
22      //方法1
23     /*@RequestMapping("/login")
24     public ModelAndView login() {
25         return new ModelAndView("login","msg","欢迎使用xxx系统");
26     }*/
27     
28     //方法2
29     /*@RequestMapping(value="/login",method=RequestMethod.GET)
30     public String login(Model model) {
31         model.addAttribute("msg", "欢迎使用xxx系统");
32         return "login";
33     }*/
34     
35     //方法3
36     @RequestMapping(value="/login",method=RequestMethod.GET)
37     public String login(ModelMap modelMap) {
38         modelMap.put("msg", "欢迎使用xxx系统");
39         return "login";
40     }
41 }

a7.重定向 -- UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import javax.websocket.server.PathParam;
 4 
 5 import org.springframework.stereotype.Controller;
 6 import org.springframework.ui.Model;
 7 import org.springframework.ui.ModelMap;
 8 import org.springframework.web.bind.annotation.PathVariable;
 9 import org.springframework.web.bind.annotation.RequestMapping;
10 import org.springframework.web.bind.annotation.RequestMethod;
11 import org.springframework.web.bind.annotation.RequestParam;
12 import org.springframework.web.servlet.ModelAndView;
13 
14 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
15 
16 @Controller
17 public class UserController {
18     @RequestMapping(value="/login",method=RequestMethod.GET)
19     public String login(ModelMap modelMap) {
20         modelMap.put("msg", "欢迎使用xxx系统");
21 //        逻辑视图名称
22 //        return "login";
23 //        重定向：URL地址
24         return "redirect:/index";
25     }
26 }

a8.完整版 -- UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import javax.validation.Valid;
 4 import javax.websocket.server.PathParam;
 5 
 6 import org.springframework.stereotype.Controller;
 7 import org.springframework.ui.Model;
 8 import org.springframework.ui.ModelMap;
 9 import org.springframework.validation.BindingResult;
10 import org.springframework.web.bind.annotation.ModelAttribute;
11 import org.springframework.web.bind.annotation.PathVariable;
12 import org.springframework.web.bind.annotation.RequestMapping;
13 import org.springframework.web.bind.annotation.RequestMethod;
14 import org.springframework.web.bind.annotation.RequestParam;
15 import org.springframework.web.servlet.ModelAndView;
16 
17 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
18 
19 @Controller
20 public class UserController {
21     @RequestMapping(value="/login",method=RequestMethod.GET)
22     public String login(ModelMap modelMap) {
23         modelMap.put("msg", "欢迎使用xxx系统");
24 //        逻辑视图名称
25         return "login";
26 //        重定向：URL地址
27 //        return "redirect:/index";
28     }
29     
30     @RequestMapping(value="/login",method=RequestMethod.POST)
31     //@ModelAttribute("loginUser")
32     public ModelAndView login(@Valid User user, BindingResult bindingResult, String code, ModelMap modelMap) {
33         if (null == code || code.trim().length() == 0) {
34             modelMap.put("codeError", "验证码不能为空");
35         }
36         
37         if (bindingResult.hasErrors()) {
38             modelMap.addAllAttributes(bindingResult.getModel());
39             System.out.println("有错误");
40             System.out.println(bindingResult.getModel());
41             return new ModelAndView("login",modelMap);
42         }
43         return new ModelAndView("index");
44     }
45 }

a9.json -- UserController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import javax.validation.Valid;
 4 import javax.websocket.server.PathParam;
 5 
 6 import org.springframework.stereotype.Controller;
 7 import org.springframework.ui.Model;
 8 import org.springframework.ui.ModelMap;
 9 import org.springframework.validation.BindingResult;
10 import org.springframework.web.bind.annotation.ModelAttribute;
11 import org.springframework.web.bind.annotation.PathVariable;
12 import org.springframework.web.bind.annotation.RequestMapping;
13 import org.springframework.web.bind.annotation.RequestMethod;
14 import org.springframework.web.bind.annotation.RequestParam;
15 import org.springframework.web.servlet.ModelAndView;
16 
17 import com.Elastic.SpringMVCDemo2.ivy.entity.User;
18 
19 @Controller
20 public class UserController {
21     @RequestMapping(value="/login",method=RequestMethod.GET)
22     public String login(ModelMap modelMap) {
23         modelMap.put("msg", "欢迎使用xxx系统");
24 //        逻辑视图名称
25         return "login";
26 //        重定向：URL地址
27 //        return "redirect:/index";
28     }
29     
30     @RequestMapping(value="/login",method=RequestMethod.POST)
31     //@ModelAttribute("loginUser")
32     public ModelAndView login(@Valid User user, BindingResult bindingResult, String code, ModelMap modelMap) {
33         if (null == code || code.trim().length() == 0) {
34             modelMap.put("codeError", "验证码不能为空");
35         }
36         
37         if (bindingResult.hasErrors()) {
38             modelMap.addAllAttributes(bindingResult.getModel());
39             System.out.println("有错误");
40             System.out.println(bindingResult.getModel());
41             return new ModelAndView("login",modelMap);
42         }
43         return new ModelAndView("index");
44     }
45     
46     @RequestMapping("/ajax/login")
47     @ResponseBody
48     public Object ajaxLogin(){
49         Map<String, Object> result = new HashMap<String, Object>();
50         result.put("name", "admin");
51         result.put("pass", "123456");
52         result.put("success", true);
53         return result;
54     }
55 }

b.IndexController

 1 package com.Elastic.SpringMVCDemo2.ivy.controller;
 2 
 3 import org.springframework.stereotype.Controller;
 4 import org.springframework.web.bind.annotation.RequestMapping;
 5 
 6 @Controller
 7 public class IndexController {
 8     @RequestMapping("/index")
 9     public String index() {
10         return "index";
11     }
12 }

3.Spring配置文件

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:aop="http://www.springframework.org/schema/aop"
 5     xmlns:tx="http://www.springframework.org/schema/tx"
 6     xmlns:context="http://www.springframework.org/schema/context"
 7     xsi:schemaLocation="http://www.springframework.org/schema/beans
 8         http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
 9         http://www.springframework.org/schema/aop
10         http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
11         http://www.springframework.org/schema/tx
12         http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
13         http://www.springframework.org/schema/context
14         http://www.springframework.org/schema/context/spring-context-3.2.xsd">
15 
16 
17 </beans>

4.SpringMVC配置文件
a1.SpringMVC-servlet.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:mvc="http://www.springframework.org/schema/mvc"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 7         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
 8         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
 9     <!-- 配置需要扫描注解的包 -->
10     <context:component-scan base-package="com.Elastic.SpringMVCDemo2.ivy.controller"></context:component-scan>
11     
12     <!-- 开启SpringMVC注解扫描 -->
13     <mvc:annotation-driven></mvc:annotation-driven>
14     
15     <!-- 配置视图解析器 -->
16     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
17         <property name="prefix" value="/WEB-INF/views/"></property>
18         <property name="suffix" value=".jsp"></property>
19     </bean>
20 </beans>

a2.SpringMVC-servlet.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:mvc="http://www.springframework.org/schema/mvc"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 7         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
 8         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
 9     <!-- 配置需要扫描注解的包 -->
10     <context:component-scan base-package="com.Elastic.SpringMVCDemo2.ivy.controller"></context:component-scan>
11     
12     <!-- 开启SpringMVC注解扫描 -->
13     <mvc:annotation-driven></mvc:annotation-driven>
14     
15     <!-- 配置视图解析器 -->
16     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
17         <property name="prefix" value="/WEB-INF/views/"></property>
18         <property name="suffix" value=".jsp"></property>
19     </bean>
20     
21     <!-- 配置静态资源（图片、CSS、JS） -->
22     <mvc:resources location="/css/*" mapping="/css/**"/>
23     <mvc:resources location="/js/*" mapping="/js/**"/>
24 </beans>

5.web.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <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">
 3   <display-name>SpringMVCDemo1_ivy</display-name>
 4   <welcome-file-list>
 5     <welcome-file>index.html</welcome-file>
 6     <welcome-file>index.htm</welcome-file>
 7     <welcome-file>index.jsp</welcome-file>
 8     <welcome-file>default.html</welcome-file>
 9     <welcome-file>default.htm</welcome-file>
10     <welcome-file>default.jsp</welcome-file>
11   </welcome-file-list>
12  
13   <!-- 指定Spring的配置文件 -->
14   <context-param>
15       <param-name>contextConfigLocation</param-name>
16       <param-value>classpath:applicationContext.xml</param-value>
17   </context-param>
18  
19   <!-- 配置Spring的监听器 -->
20   <listener>
21       <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
22   </listener>
23  
24   <!-- 配置SpringMVC的拦截器 -->
25   <servlet>
26       <servlet-name>SpringMVC</servlet-name>
27       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
28       <init-param>
29           <param-name>contextConfigLocation</param-name>
30           <param-value>classpath:SpringMVC-servlet.xml</param-value>
31       </init-param>
32       <load-on-startup>1</load-on-startup>
33   </servlet>
34   <servlet-mapping>
35       <servlet-name>SpringMVC</servlet-name>
36       <url-pattern>/</url-pattern>
37   </servlet-mapping>
38  
39 </web-app>

6.jsp
a.login.jsp

 1 <%--引入JSP页面PAGE指令 --%>
 2 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 3 <%-- 引入JSTL标签指令 --%>
 4 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 5 <!DOCTYPE html>
 6 <html language="zh-CN">
 7 <head>
 8     <meta charset="utf-8">
 9     <!-- 设置浏览器渲染的引擎  -->
10     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
11     <!-- 设置支持移动设备  -->
12     <meta name="viewport" content="width=device-width, initial-scale=1">
13     <title>登录</title>
14     <!-- 引入bootstrap的样式 -->
15     <link rel="stylesheet" type="text/css" href="<%=request.getContextPath()%>/css/bootstrap.min.css">
16 </head>
17 <body>
18     <div class="container">
19         <div class="panel panel-primary center-block">
20             <div class="panel-heading">登录</div>
21             <div class="panel-body">
22                 <form action="" method="post">
23                     <div class="form-group">
24                         <label class="col-md-3 control-label" for="loginName">用户名：</label>
25                         <div class="col-md-6" >
26                             <input class="form-control" id="loginName" name="name" type="text" autocomplete="off"/>
27                         </div>
28                     </div>
29                     <div class="form-group">
30                         <label class="col-md-3 control-label" for="loginPass">密码：</label>
31                         <div class="col-md-6" >
32                             <input class="form-control" id="loginPass" name="pass" type="password"/>
33                         </div>
34                     </div>
35                     <div class="form-group">
36                         <label class="col-md-3 control-label" for="code">验证码：</label>
37                         <div class="col-md-6" >
38                             <input class="form-control" id="code" name="code" type="text"/>
39                         </div>
40                     </div>
41                     
42                     <div class="form-group">
43                         <div class="col-md-offset-3 col-md-6">
44                             <input class="btn btn-primary btn-block" type="submit" value="登录" />
45                         </div>
46                     </div>
47                 </form>
48             </div>
49         </div>
50     </div>
51     
52     <!-- 引入JS的样式  -->
53     <script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery-2.2.4.js"></script>
54     <script type="text/javascript" src="<%=request.getContextPath()%>/js/bootstrap.min.js"></script>
55     
56 </body>
57 </html>

a2.页面显示信息 -- login.jsp

 1 <%--引入JSP页面PAGE指令 --%>
 2 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 3 <%-- 引入JSTL标签指令 --%>
 4 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 5 <!DOCTYPE html>
 6 <html language="zh-CN">
 7 <head>
 8     <meta charset="utf-8">
 9     <!-- 设置浏览器渲染的引擎  -->
10     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
11     <!-- 设置支持移动设备  -->
12     <meta name="viewport" content="width=device-width, initial-scale=1">
13     <title>登录</title>
14     <!-- 引入bootstrap的样式 -->
15     <link rel="stylesheet" type="text/css" href="<%=request.getContextPath()%>/css/bootstrap.min.css">
16 </head>
17 <body>
18     <div class="container">
19         <div class="panel panel-primary center-block">
20             <div class="panel-heading">${msg }</div>
21             <div class="panel-body">
22                 <!-- <fm:form action="user/login" method="post"> -->
23                 <form action="" method="post">
24                     <div class="form-group">
25                         <label class="col-md-3 control-label" for="loginName">用户名：</label>
26                         <div class="col-md-6" >
27                             <input class="form-control" id="loginName" name="name" type="text" autocomplete="off"/>
28                         </div>
29                         <div class="col-md-3">
30                             <!-- <fm:errors path="user.name"></fm:errors> -->
31                         </div>
32                     </div>
33                     <div class="form-group">
34                         <label class="col-md-3 control-label" for="loginPass">密码：</label>
35                         <div class="col-md-6" >
36                             <input class="form-control" id="loginPass" name="pass" type="password"/>
37                         </div>
38                         <div class="col-md-3">
39                             <!-- <fm:errors path="user.pass"></fm:errors> -->
40                         </div>
41                     </div>
42                     <div class="form-group">
43                         <label class="col-md-3 control-label" for="code">验证码：</label>
44                         <div class="col-md-6" >
45                             <input class="form-control" id="code" name="code" type="text"/>
46                         </div>
47                         <div class="col-md-3">
48                         <!--     <fm:errors path="code"></fm:errors> -->
49                         </div>
50                     </div>
51                     
52                     <div class="form-group">
53                         <div class="col-md-offset-3 col-md-6">
54                             <input class="btn btn-primary btn-block" type="submit" value="登录" />
55                         </div>
56                     </div>
57                 <!-- </fm:form> -->
58                 </form>
59             </div>
60         </div>
61     </div>
62     
63     <!-- 引入JS的样式  -->
64     <script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery-2.2.4.js"></script>
65     <script type="text/javascript" src="<%=request.getContextPath()%>/js/bootstrap.min.js"></script>
66     
67 </body>
68 </html>

a3.Spring标签 -- login.jsp

 1 <%--引入JSP页面PAGE指令 --%>
 2 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 3 <%-- 引入JSTL标签指令 --%>
 4 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 5 <%@ taglib uri="http://www.springframework.org/tags/form" prefix="fm"%>
 6 <!DOCTYPE html>
 7 <html language="zh-CN">
 8 <head>
 9     <meta charset="utf-8">
10     <!-- 设置浏览器渲染的引擎  -->
11     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
12     <!-- 设置支持移动设备  -->
13     <meta name="viewport" content="width=device-width, initial-scale=1">
14     <title>登录</title>
15     <!-- 引入bootstrap的样式 -->
16     <link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/css/bootstrap.min.css">
17 </head>
18 <body>
19     <div class="container">
20         <div class="panel panel-primary center-block">
21             <div class="panel-heading">${msg }</div>
22             <div class="panel-body">
23                 <fm:form action="" method="post" modelAttribute="user">
24                     <div class="form-group">
25                         <label class="col-md-3 control-label" for="loginName">用户名：</label>
26                         <div class="col-md-6" >
27                             <input class="form-control" id="loginName" name="name" type="text" autocomplete="off"/>
28                         </div>
29                         <div class="col-md-3">
30                             <fm:errors path="name"></fm:errors>
31                         </div>
32                     </div>
33                     <div class="form-group">
34                         <label class="col-md-3 control-label" for="loginPass">密码：</label>
35                         <div class="col-md-6" >
36                             <input class="form-control" id="loginPass" name="pass" type="password"/>
37                         </div>
38                         <div class="col-md-3">
39                             <fm:errors path="pass"></fm:errors>
40                         </div>
41                     </div>
42                     <div class="form-group">
43                         <label class="col-md-3 control-label" for="code">验证码：</label>
44                         <div class="col-md-6" >
45                             <input class="form-control" id="code" name="code" type="text"/>
46                         </div>
47                         <div class="col-md-3">
48                             <fm:errors path="code"></fm:errors>
49                         </div>
50                     </div>
51                     
52                     <div class="form-group">
53                         <div class="col-md-offset-3 col-md-6">
54                             <input class="btn btn-primary btn-block" type="submit" value="登录" />
55                         </div>
56                     </div>
57                 </fm:form>
58             </div>
59         </div>
60     </div>
61     
62     <!-- 引入JS的样式  -->
63     <script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-2.2.4.js"></script>
64     <script type="text/javascript" src="${pageContext.request.contextPath }/js/bootstrap.min.js"></script>
65     
66 </body>
67 </html>

a4.完整版 -- login.jsp

 1 <%--引入JSP页面PAGE指令 --%>
 2 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 3 <%-- 引入JSTL标签指令 --%>
 4 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 5 <%@ taglib uri="http://www.springframework.org/tags/form" prefix="fm"%>
 6 <!DOCTYPE html>
 7 <html language="zh-CN">
 8 <head>
 9     <meta charset="utf-8">
10     <!-- 设置浏览器渲染的引擎  -->
11     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
12     <!-- 设置支持移动设备  -->
13     <meta name="viewport" content="width=device-width, initial-scale=1">
14     <title>登录</title>
15     <!-- 引入bootstrap的样式 -->
16     <link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/css/bootstrap.min.css">
17 </head>
18 <body>
19     <div class="container">
20         <div class="panel panel-primary center-block">
21             <div class="panel-heading">${msg }</div>
22             <div class="panel-body">
23                 <fm:form action="" method="post" modelAttribute="user">
24                     <div class="form-group">
25                         <label class="col-md-3 control-label" for="loginName">用户名：</label>
26                         <div class="col-md-6" >
27                             <input class="form-control" id="loginName" name="name" type="text" autocomplete="off"/>
28                         </div>
29                         <div class="col-md-3">
30                             <fm:errors path="name"></fm:errors>
31                         </div>
32                     </div>
33                     <div class="form-group">
34                         <label class="col-md-3 control-label" for="loginPass">密码：</label>
35                         <div class="col-md-6" >
36                             <input class="form-control" id="loginPass" name="pass" type="password"/>
37                         </div>
38                         <div class="col-md-3">
39                             <fm:errors path="pass"></fm:errors>
40                         </div>
41                     </div>
42                     <div class="form-group">
43                         <label class="col-md-3 control-label" for="code">验证码：</label>
44                         <div class="col-md-6" >
45                             <input class="form-control" id="code" name="code" type="text"/>
46                         </div>
47                         <div class="col-md-3">
48                             ${codeError }
49                         </div>
50                     </div>
51                     
52                     <div class="form-group">
53                         <div class="col-md-offset-3 col-md-6">
54                             <input class="btn btn-primary btn-block" type="submit" value="登录" />
55                         </div>
56                     </div>
57                 </fm:form>
58             </div>
59         </div>
60     </div>
61     
62     <!-- 引入JS的样式  -->
63     <script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-2.2.4.js"></script>
64     <script type="text/javascript" src="${pageContext.request.contextPath }/js/bootstrap.min.js"></script>
65     
66 </body>
67 </html>

b.index.jsp

 1 <%--引入JSP页面PAGE指令 --%>
 2 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 3 <%-- 引入JSTL标签指令 --%>
 4 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 5 <!DOCTYPE html>
 6 <html language="zh-CN">
 7 <head>
 8     <meta charset="utf-8">
 9     <!-- 设置浏览器渲染的引擎  -->
10     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
11     <!-- 设置支持移动设备  -->
12     <meta name="viewport" content="width=device-width, initial-scale=1">
13     <title>首页</title>
14     <!-- 引入bootstrap的样式 -->
15     <link rel="stylesheet" type="text/css" href="<%=request.getContextPath()%>/css/bootstrap.min.css">
16 </head>
17 <body>
18     <div class="container">
19         <h1>首页</h1>
20     </div>
21     
22     <!-- 引入JS的样式  -->
23     <script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery-2.2.4.js"></script>
24     <script type="text/javascript" src="<%=request.getContextPath()%>/js/bootstrap.min.js"></script>
25     
26 </body>
27 </html>

查看全文

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原文地址：https://www.cnblogs.com/ivy-xu/p/5671738.html