spring mvc annonation(环境搭建和最基本的请求映射)

 1.配置web.xml
2.配置xxxx-servlet.xml--支持部件扫描和视图解析
3.创建一个学生类Student,一个Controller，名称是StudentController,注释为@Controller
4.添加工程需要的jar包,将spring3.0所有jar放进去,commons-logging.jar，log4j-1.2.15.jar,commons-fileupload-1.2.jar,反正就是根据（启动tomcat时）错误提示增加jar
5.创建一个index.jsp,加一个链接到studentAdd
6.在Controller中处理studentAdd
7.在edit.jsp中使用spring标签库
 <1>在jsp中增加(第一行是处理编码)
 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
 <%@ taglib prefix="form" uri="http://www.springframe.work.org/tags/form" %>
 <2>在web.xml中配置标签库位置
 <jsp-config>
  <taglib>
   <taglib-uri>http://www.springframe.work.org/tags/form</taglib-uri>
   <taglib-location>/WEB-INF/tld/spring-form.tld</taglib-location>
  </taglib>
 </jsp-config>
 <3>将spring-form.tld放入相应文件夹
-------------------------------插入@ModelAttribute标签使用-----------------------
1>注释在Controller中，标注在方法上，这个方法会在所有标注@RequestMapping的方法前被执行，一般用来生成对象放在model中,如果不定义名字，默认的名字是类名，但第一个字母小写
2>注释在@RequestMapping的方法的参数的类型前面，会将表单parameter根据名字注入到参数中（字符串映射到其他类型需要convert），如果没有响应的参数，则会new一个新的对象
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代码:

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"version="2.4"><display-name>springmvc</display-name><description>     sms admin site  </description>  <context-param><param-name>webAppRootKey</param-name><param-value>backend.root</param-value></context-param><context-param><param-name>log4jConfigLocation</param-name><param-value>classpath:config/log4j.properties</param-value></context-param><listener><listener-class>org.springframework.web.util.Log4jConfigListener</listener-class></listener><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:config/context/applicationContext*.xml</param-value></context-param><servlet><servlet-name>study</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>study</servlet-name><url-pattern>/</url-pattern></servlet-mapping><session-config><session-timeout>20</session-timeout></session-config><welcome-file-list><welcome-file>index.do</welcome-file><welcome-file>index.jsp</welcome-file><welcome-file>index.html</welcome-file><welcome-file>index.htm</welcome-file></welcome-file-list>  <jsp-config><taglib><taglib-uri>http://www.springframe.work.org/tags/form</taglib-uri><taglib-location>/WEB-INF/tld/spring-form.tld</taglib-location></taglib></jsp-config></web-app>

study-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:context="http://www.springframework.org/schema/context"xmlns:task="http://www.springframework.org/schema/task"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="        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        http://www.springframework.org/schema/task        http://www.springframework.org/schema/task/spring-task-3.0.xsd        http://www.springframework.org/schema/mvc        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">            <context:component-scan base-package="com.smvc"/>        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"         p:prefix="/WEB-INF/jsp/" p:suffix=".jsp"/><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/></beans>

Student.java

package com.smvc.annonation.bean;import java.util.Date;public class Student {private String name;private String gender;private int age;private Date birthday;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}public String getName() {return name;}public void setName(String name) {this.name = name;}}

StudentController.java

package com.smvc.annonation.controller;import javax.servlet.http.HttpServletRequest;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.springframework.stereotype.Controller;import org.springframework.validation.BindingResult;import org.springframework.web.bind.annotation.ModelAttribute;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.servlet.ModelAndView;import com.smvc.annonation.bean.Student;@Controllerpublic class StudentController {protected final Log logger = LogFactory.getLog(getClass());/* * 会将一个新的Student增加到modelattribute中，名字为st2,在视图中可以使用,也许可以用在编辑页面@ModelAttribute("st2")public Student getStudent(){System.out.println("In modelAttribute");Student re = new Student();re.setName("Haha");re.setAge(30);re.setGender("male");return re;}*/@RequestMapping(value="/studentAdd")public ModelAndView studentAdd(@ModelAttribute("bb") Student cc, BindingResult br){if(br.hasErrors()) {return new ModelAndView("edit");}logger.info(br);System.out.println(cc.getName());return new ModelAndView("aa");}}

log4j.properties

log4j.rootLogger=warn, stdout#stdout console appenderlog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=[%d{yyyy.MM.dd HH:mm:ss}] %p %C:%M(%L) - %m%n

index.jsp

<a href="studentAdd">添加学生</a>

edit.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8" %><%@ taglib prefix="form" uri="http://www.springframe.work.org/tags/form" %><style>.error { color: red; }</style><html><head><title>学生管理系统</title></head><body><form:form action="edit" method="post" commandName="bb"><table><tr><td align="center">学生姓名:</td><td><form:input path="name"/></td><td><form:errors path="name" cssClass="error"/></td></tr><tr><td align="center">性别:</td><td><form:input path="gender" /></td><td><form:errors path="gender" cssClass="error"/></td></tr><tr><td align="center">年龄:</td><td><form:input path="age"/></td><td><form:errors path="age" cssClass="error"/></td><tr/><tr><td align="center">生日:</td><td><form:input path="birthday"/></td><td><form:errors path="birthday" cssClass="error"/></td><tr/><tr><td align="center"><button type="submit">提交</button></td></tr></table></form:form></body></html>