java：Springmvc框架2（Ajax，Interceptor，）
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内容图文
1.springmvcAjax：
springmvc.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:context
="http://www.springframework.org/schema/context"
xmlns:mvc
="http://www.springframework.org/schema/mvc"
xsi:schemaLocation
="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd"
>
<!--
注解扫描!!!
-->
<
context:component-scan
base-package
="cn.zzsxt"
></
context:component-scan
>
<!--
配置视图解析器
-->
<!--
InternalResourceViewResolver：支持JSP视图解析
-->
<!--
viewClass：JstlView表示JSP模板页面需要使用JSTL标签库，所以classpath中必须包含jstl的相关jar包；
-->
<!--
prefix 和suffix：查找视图页面的前缀和后缀，最终视图的址为：
-->
<!--
前缀+逻辑视图名+后缀，逻辑视图名需要在controller中返回ModelAndView指定，比如逻辑视图名为hello，
-->
<!--
则最终返回的jsp视图地址 "WEB-INF/view/hello.jsp"
-->
<
bean
class
="org.springframework.web.servlet.view.InternalResourceViewResolver"
>
<
property
name
="viewClass"
value
="org.springframework.web.servlet.view.JstlView"
></
property
>
<
property
name
="prefix"
value
="/WEB-INF/jsp/"
></
property
>
<
property
name
="suffix"
value
=".jsp"
></
property
>
</
bean
>
<!--
注解映射器
说明 ：对类中标记@ResquestMapping的方法进行映射，根据ResquestMapping定义的url匹配
ResquestMapping标记的方法，匹配成功返回HandlerMethod对象给前端控制器，HandlerMethod对象中封装url对应的方法Method
-->
<!--
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
-->
<!--
注解适配器
说明：注解式处理器适配器，对标记@ResquestMapping的方法进行适配。
-->
<!--
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
-->
<!--
springmvc使用<mvc:annotation-driven>
-->
<!--
自动加载RequestMappingHandlerMapping和RequestMappingHandlerAdapter，
-->
<!--
可用在springmvc.xml配置文件中使用<mvc:annotation-driven>替代注解处理器和适配器的配置。
-->
<
mvc:annotation-driven
conversion-service
="conversionService"
></
mvc:annotation-driven
>
<!--
自定义类型转换器
-->
<
bean
id
="conversionService"
class
="org.springframework.format.support.FormattingConversionServiceFactoryBean"
>
<
property
name
="converters"
>
<
list
>
<
bean
class
="cn.zzsxt.converter.CustomDateConverter"
></
bean
>
</
list
>
</
property
>
</
bean
>
<!--
处理静态资源 让静态资源可以直接访问
-->
<!--
<mvc:resources mapping="/js/**" location="/js/"/>
-->
<!--
当在web.xml 中 DispatcherServlet使用 <url-pattern>/</url-pattern> 映射时，能映射静态资源
-->
<
mvc:default-servlet-handler
/>
</
beans
>
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_3_0.xsd"
id
="WebApp_ID"
version
="3.0"
>
<
display-name
>springmvc01</display-name><welcome-file-list><welcome-file>index.html</welcome-file><welcome-file>index.htm</welcome-file><welcome-file>index.jsp</welcome-file><welcome-file>default.html</welcome-file><welcome-file>default.htm</welcome-file><welcome-file>default.jsp</welcome-file></welcome-file-list><!-- 解决post提交乱码问题 --><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><!-- spring mvc的前端控制器,类似struts2的核心过滤器 --><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- 通过contextConfigLocation参数指定配置文件的位置，默认在WEB-INF/查找名称为 [servlet-name]-servlet.xml --><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param><!-- servlet随web容器而启动 --><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping></web-app>
UserController.java:
package
cn.zzsxt.controller;
import
java.util.HashMap;
import
java.util.Map;
import
org.springframework.stereotype.Controller;
import
org.springframework.web.bind.annotation.RequestBody;
import
org.springframework.web.bind.annotation.RequestMapping;
import
org.springframework.web.bind.annotation.RequestMethod;
import
org.springframework.web.bind.annotation.ResponseBody;
import
cn.zzsxt.model.Userinfo;
import
cn.zzsxt.service.UserService;
import
cn.zzsxt.service.impl.UserServiceImpl;
import
cn.zzsxt.vo.ResultMessage;
@Controller
@RequestMapping("/user")
publicclass UserController {
private UserService userService = new UserServiceImpl();
@RequestMapping(value="login",method=RequestMethod.GET)
public String login(){
return "login";
}
@RequestMapping(value="register",method=RequestMethod.GET)
public String register(){
return "register";
}
/**
* @ResponseBody:将java对象转换为json对象
* @RequestBody:将json对象转换为java对象
* @param userName
* @return*/
@RequestMapping(value="check",method=RequestMethod.GET)
@ResponseBody
public Map<String,Object> check(@RequestBody String userName){
boolean isExist = userService.checkUserName(userName);
Map<String,Object> map = new HashMap<String,Object>();
map.put("isExist", isExist);
return map;
}
@RequestMapping(value="register",method=RequestMethod.POST)
@ResponseBody
public ResultMessage register(@RequestBody Userinfo user){ //此处@RequestBody出错的话不加？
boolean success = userService.add(user);
String message=success?"添加成功!":"添加失败!";
ResultMessage rm = new ResultMessage();
rm.setSuccess(success);
rm.setMessage(message);
return rm;
}
}
CustomDateConverter.java:
package
cn.zzsxt.converter;
import
java.text.ParseException;
import
java.text.SimpleDateFormat;
import
java.util.Date;
import
org.springframework.core.convert.converter.Converter;
/**
* 自定义类型转换器
*
@author
Think
*
*/
public
class CustomDateConverter implements Converter<String, Date> {
@Override
public Date convert(String source) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
Date date = sdf.parse(source);
return date;
} catch (ParseException e) {
e.printStackTrace();
}
returnnull;
}
}
ResultMessage.java:
package
cn.zzsxt.vo;
public
class
ResultMessage {
private
boolean success;//是否新增成功private String message;//操作完成后的提升消息publicboolean isSuccess() {
return success;
}
publicvoid setSuccess(boolean success) {
this.success = success;
}
public String getMessage() {
return message;
}
publicvoid setMessage(String message) {
this.message = message;
}
}
login.jsp:
<%
@ page language
=
"
java
"
import
=
"
java.util.*
"
pageEncoding
=
"
UTF-8
"
%>
<%
String
path
=
request.getContextPath();
String
basePath
=
request.getScheme()
+
"
://
"
+
request.getServerName()
+
"
:
"
+
request.getServerPort()
+
path
+
"
/
"
;
%>
<!
DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
>
<
html
>
<
head
>
<
base
href
="<%=basePath%>"
>
<
title
>My JSP ‘login.jsp‘ starting page</title><script type="text/javascript" src="js/jquery-3.2.1.min.js"></script><script type="text/javascript">
$(function(){
$("#userName").blur(function(){
var userName = $("#userName").val();
$.get("user/check?userName="+userName,function(data){
if(data.isExist==true){
$("#msg").html("<font color=red>用户名已存在!</font>");
$("#submitBtn").attr("disabled",true);
}else{
$("#msg").html("<font color=green>用户名可用!</font>");
$("#submitBtn").attr("disabled",false);
}
});
});
})
</script></head><body><form action="" method="post">
用户名:<input type="text" name="userName" id="userName"/><span id="msg"></span><br>
密码:<input type="text" name="userPass"/><br><input type="submit" value="登录" id="submitBtn"></form></body></html>
register.jsp:
<%
@ page language
=
"
java
"
import
=
"
java.util.*
"
pageEncoding
=
"
UTF-8
"
%>
<%
String
path
=
request.getContextPath();
String
basePath
=
request.getScheme()
+
"
://
"
+
request.getServerName()
+
"
:
"
+
request.getServerPort()
+
path
+
"
/
"
;
%>
<!
DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
>
<
html
>
<
head
>
<
base
href
="<%=basePath%>"
>
<
title
>My JSP ‘login.jsp‘ starting page</title><script type="text/javascript" src="js/jquery-3.2.1.min.js"></script><script type="text/javascript">
$(function(){
//单机注册按钮 $("#submitBtn").click(function(){
//获取表单元素的值var userName = $("#userName").val();
var userPass = $("#userPass").val();
var address = $("#address").val();
var birthday = $("#birthday").val();
var jsonData =‘{"userName":"‘+userName+‘","userPass":"‘+userPass+‘","address":"‘+address+‘","birthday":"‘+birthday+‘"}‘;
// alert(jsonData); $.ajax({
type:"POST",
url:"user/register",
contentType:"application/json",
data:jsonData,
success: function(msg){
// alert( "Data Saved: " + msg ); alert(msg.message);
}
});
});
})
</script></head><body><form action="" method="post">
用户名:<input type="text" name="userName" id="userName"/><span id="msg"></span><br>
密码:<input type="text" name="userPass" id="userPass"/><br>
地址:<input type="text" name="address" id="address"><br>
生日:<input type="text" name="birthday" id="birthday"><br><input type="button" value="注册" id="submitBtn"></form></body></html>
2.springmvcInterceptor：
springmvc.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:context
="http://www.springframework.org/schema/context"
xmlns:mvc
="http://www.springframework.org/schema/mvc"
xsi:schemaLocation
="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd"
>
<!--
注解扫描!!!
-->
<
context:component-scan
base-package
="cn.zzsxt.controller"
></
context:component-scan
>
<!--
配置视图解析器
-->
<!--
InternalResourceViewResolver：支持JSP视图解析
-->
<!--
viewClass：JstlView表示JSP模板页面需要使用JSTL标签库，所以classpath中必须包含jstl的相关jar包；
-->
<!--
prefix 和suffix：查找视图页面的前缀和后缀，最终视图的址为：
-->
<!--
前缀+逻辑视图名+后缀，逻辑视图名需要在controller中返回ModelAndView指定，比如逻辑视图名为hello，
-->
<!--
则最终返回的jsp视图地址 "WEB-INF/view/hello.jsp"
-->
<
bean
class
="org.springframework.web.servlet.view.InternalResourceViewResolver"
>
<
property
name
="viewClass"
value
="org.springframework.web.servlet.view.JstlView"
></
property
>
<
property
name
="prefix"
value
="/WEB-INF/jsp/"
></
property
>
<
property
name
="suffix"
value
=".jsp"
></
property
>
</
bean
>
<!--
注解映射器
说明 ：对类中标记@ResquestMapping的方法进行映射，根据ResquestMapping定义的url匹配
ResquestMapping标记的方法，匹配成功返回HandlerMethod对象给前端控制器，HandlerMethod对象中封装url对应的方法Method
-->
<!--
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
-->
<!--
注解适配器
说明：注解式处理器适配器，对标记@ResquestMapping的方法进行适配。
-->
<!--
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
-->
<!--
springmvc使用<mvc:annotation-driven>
-->
<!--
自动加载RequestMappingHandlerMapping和RequestMappingHandlerAdapter，
-->
<!--
可用在springmvc.xml配置文件中使用<mvc:annotation-driven>替代注解处理器和适配器的配置。
-->
<
mvc:annotation-driven
></
mvc:annotation-driven
>
<!--
处理静态资源 让静态资源可以直接访问
-->
<!--
<mvc:resources mapping="/jquery-ui-1.12.1.custom/**" location="/jquery-ui-1.12.1.custom/"/>
-->
<!--
当在web.xml 中 DispatcherServlet使用 <url-pattern>/</url-pattern> 映射时，能映射静态资源
-->
<
mvc:default-servlet-handler
/>
<!--
配置拦截器, 多个拦截器,顺序执行
-->
<
mvc:interceptors
>
<
mvc:interceptor
>
<!--
匹配的是url路径， 如果不配置或/**,将拦截所有的Controller
-->
<
mvc:mapping
path
="/**"
/>
<
bean
class
="cn.zzsxt.interceptor.MyCustomInterceptor"
></
bean
>
</
mvc:interceptor
>
<!--
当设置多个拦截器时，先按顺序调用preHandle方法，然后逆序调用每个拦截器的postHandle和afterCompletion方法
-->
<
mvc:interceptor
>
<!--
配置拦截的匹配路径
-->
<
mvc:mapping
path
="/**"
/>
<!--
配置放行的匹配路径
-->
<
mvc:exclude-mapping
path
="/user/login"
/>
<
bean
class
="cn.zzsxt.interceptor.LoginInterceptor"
></
bean
>
</
mvc:interceptor
>
</
mvc:interceptors
>
</
beans
>
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_3_0.xsd"
id
="WebApp_ID"
version
="3.0"
>
<
display-name
>springmvc01</display-name><welcome-file-list><welcome-file>index.html</welcome-file><welcome-file>index.htm</welcome-file><welcome-file>index.jsp</welcome-file><welcome-file>default.html</welcome-file><welcome-file>default.htm</welcome-file><welcome-file>default.jsp</welcome-file></welcome-file-list><!-- 解决post提交乱码问题 --><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><!-- spring mvc的前端控制器,类似struts2的核心过滤器 --><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!-- 通过contextConfigLocation参数指定配置文件的位置，默认在WEB-INF/查找名称为 [servlet-name]-servlet.xml --><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param><!-- servlet随web容器而启动 --><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping></web-app>
TestController.java:
package
cn.zzsxt.controller;
import
org.springframework.stereotype.Controller;
import
org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/t")
publicclass TestController {
@RequestMapping("/hello")
public String hello(){
System.out.println("TestController中hello()方法被执行了....");
return "success";
}
}
UserController.java:
package
cn.zzsxt.controller;
import
java.util.ArrayList;
import
java.util.List;
import
javax.servlet.http.HttpSession;
import
org.springframework.stereotype.Controller;
import
org.springframework.ui.Model;
import
org.springframework.web.bind.annotation.RequestMapping;
import
org.springframework.web.bind.annotation.RequestMethod;
import
cn.zzsxt.model.Userinfo;
@Controller
@RequestMapping("/user")
publicclass UserController {
@RequestMapping(value="/login",method=RequestMethod.GET)
public String login(){
return "login";
}
@RequestMapping(value="/login",method=RequestMethod.POST)
public String login(Userinfo user,HttpSession session){
if("admin".equals(user.getUserName())&&"admin".equals(user.getUserPass())){
//将用户信息保持到sesssion中
session.setAttribute("loginUser", user);
return "redirect:/user/list";
}
return "login";
}
@RequestMapping(value="/list")
public String list(Model model){
//从数据库中查询用户信息
List<Userinfo> list = new ArrayList<Userinfo>();
for (int i = 1; i <=5; i++) {
Userinfo user = new Userinfo(i,"zhang"+i,"zhang"+i);
list.add(user);
}
model.addAttribute("list", list);
return "list";
}
}
LoginInterceptor.java:
package
cn.zzsxt.interceptor;
import
javax.servlet.http.HttpServletRequest;
import
javax.servlet.http.HttpServletResponse;
import
javax.servlet.http.HttpSession;
import
org.springframework.web.servlet.HandlerInterceptor;
import
org.springframework.web.servlet.ModelAndView;
import
cn.zzsxt.model.Userinfo;
public
class LoginInterceptor implements HandlerInterceptor {
@Override
publicboolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception {
HttpSession session = request.getSession();//获取session
//从session中获取用户信息
Userinfo user=(Userinfo)session.getAttribute("loginUser");
if(user!=null){
returntrue;
}else{
response.sendRedirect("login");
returnfalse;
}
}
@Override
publicvoid afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
throws Exception {
// TODO Auto-generated method stub
}
@Override
publicvoid postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
throws Exception {
// TODO Auto-generated method stub
}
}
MyCustomInterceptor.java:
package
cn.zzsxt.interceptor;
import
javax.servlet.http.HttpServletRequest;
import
javax.servlet.http.HttpServletResponse;
import
org.springframework.web.servlet.HandlerInterceptor;
import
org.springframework.web.servlet.ModelAndView;
public
class MyCustomInterceptor implements HandlerInterceptor {
/**
* 在控制器方法调用前执行
* 返回值为是否中断
* true,表示继续执行（下一个拦截器或处理器）
* false则会中断后续的所有操作，所以我们需要使用response来继续响应后续请求
*/
@Override
publicboolean preHandle(HttpServletRequest request, HttpServletResponse response, Object object) throws Exception {
System.out.println("preHandle()方法被执行了.......");
returntrue;
}
/**
* 在控制器方法调用后，解析视图前调用，我们可以对视图和模型做进一步渲染或修改
* 可在modelAndView中加入数据，比如当前时间
*/
@Override
publicvoid postHandle(HttpServletRequest request, HttpServletResponse response, Object object, ModelAndView modelAndView)
throws Exception {
System.out.println("postHandle()方法被执行了.....");
}
/**
* 整个请求完成，即视图渲染结束后调用，这个时候可以做些资源清理工作，或日志记录
*/
@Override
publicvoid afterCompletion(HttpServletRequest request, HttpServletResponse response, Object object, Exception exception)
throws Exception {
System.out.println("afterCompletion方法被执行了....");
}
}
原文：http://www.cnblogs.com/kuangzhisen/p/7450600.html
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