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31、springmvc(注解)
回顾什么是springmvc,它与spring有什么关系
springmvc属于spring框架的后续产品,用在基于MVC的表现层开发,类似于struts2框架
参见<<springmvc与spring的关系.JPG>>
回顾springmvc工作流程
参见<< springmvc工作流.JPG>>
第十四章 springmvc快速入门(注解版本)
1)springmvc快速入门(传统版)
步一:创建springmvc-day02这么一个web应用
步二:导入springioc,springweb和springmvc相关的jar包
------------------------------------------------------springWEB模块 org.springframework.web-3.0.5.RELEASE.jar org.springframework.web.servlet-3.0.5.RELEASE.jar(mvc专用) ------------------------------------------------------springIOC模块 org.springframework.asm-3.0.5.RELEASE.jar org.springframework.beans-3.0.5.RELEASE.jar org.springframework.context-3.0.5.RELEASE.jar org.springframework.core-3.0.5.RELEASE.jar org.springframework.expression-3.0.5.RELEASE.jar |
步三:在/WEB-INF/下创建web.xml文件
<servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> |
步四:创建HelloAction.java控制器类
@Controller public class HelloAction{ @RequestMapping(value="http://www.mamicode.com/hello") public String helloMethod(Model model) throws Exception{ System.out.println("HelloAction::helloMethod()"); model.addAttribute("message","这是我的第二个springmvc应用程序"); return "/success.jsp"; } } |
步五:在/WebRoot/下创建success.jsp
<%@ page language="java" pageEncoding="UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>这是我的第二个springmvc应用程序</title> </head> <body> success.jsp<br/> ${message} </body> </html> |
步六:在/src/目录下创建spring.xml配置文件
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
">
<!-- Action控制器 --> <context:component-scan base-package="cn.itcast.javaee.springmvc.helloannotation"/>
<!-- 基于注解的映射器(可选) --> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
<!-- 基于注解的适配器(可选) --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<!-- 视图解析器(可选) --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"/>
</beans> |
步七:部署web应用到tomcat中,通过浏览器访问如下URL:
http://127.0.0.1:8080/springmvc-day02/hello.action
第十五章一个Action中,可以写多个类似的业务控制方法
1)通过模块根路径 + 功能子路径 = 访问模块下子功能的路径
@Controller @RequestMapping(value="http://www.mamicode.com/user") public class UserAction{ @RequestMapping(value="http://www.mamicode.com/add") public String add(Model model) throws Exception{ System.out.println("HelloAction::add()"); model.addAttribute("message","增加用户"); return "/success.jsp"; } @RequestMapping(value="http://www.mamicode.com/find") public String find(Model model) throws Exception{ System.out.println("HelloAction::find()"); model.addAttribute("message","查询用户"); return "/success.jsp"; } } |
增加用户:http://127.0.0.1:8080/myspringmvc-day02/user/add.action
查询用户:http://127.0.0.1:8080/myspringmvc-day02/user/find.action
第十六章在业务控制方法中写入普通变量收集参数
1)可以在业务控制方法中,以参数形式收集客户端参数,springmvc采用方法参数形式的
@Controller @RequestMapping(value="http://www.mamicode.com/user") public class UserAction{ @RequestMapping(value="http://www.mamicode.com/add") public String add(Model model,int id,String name,Double sal) throws Exception{ System.out.println("HelloAction::add()"); System.out.println(id + ":" + name + ":" + sal); model.addAttribute("message","增加用户"); return "/success.jsp"; } } |
http://127.0.0.1:8080/myspringmvc-day02/user/add.action?id=1&name=zhaojun&sal=5000
第十七章限定某个业务控制方法,只允许GET或POST请求方式访问
1)可以在业务控制方法前,指明该业务控制方法只能接收GET或POST的请求
@Controller @RequestMapping(value="http://www.mamicode.com/user") public class UserAction{ @RequestMapping(value="http://www.mamicode.com/add",method=RequestMethod.POST) public String add(Model model,int id,String name,double sal) throws Exception{ System.out.println("HelloAction::add()::POST"); System.out.println(id + ":" + name + ":" + sal); model.addAttribute("message","增加用户"); return "/success.jsp"; } } |
如果不书写method=RequestMethod.POST的话,GET和POST请求都支持
第十八章在业务控制方法中写入Request,Response等传统web参数
1)可以在业务控制方法中书写传统web参数,这种方式我们不提倡,耦合了
@Controller @RequestMapping(value="http://www.mamicode.com/user") public class UserAction{ @RequestMapping(value="http://www.mamicode.com/add",method=RequestMethod.POST) public void add(HttpServletRequest request,HttpServletResponse response) throws Exception{ System.out.println("HelloAction::add()::POST"); int id = Integer.parseInt(request.getParameter("id")); String name = request.getParameter("name"); double sal = Double.parseDouble(request.getParameter("sal")); System.out.println(id + ":" + name + ":" + sal); request.getSession().setAttribute("id",id); request.getSession().setAttribute("name",name); request.getSession().setAttribute("sal",sal); response.sendRedirect(request.getContextPath()+"/register.jsp"); } } |
第十九章在业务控制方法中写入模型变量收集参数,且使用@InitBind来解决字符串转日期类型
1) 在默认情况下,springmvc不能将String类型转成java.util.Date类型,所有我们只能在Action
中自定义类型转换器
<form action="${pageContext.request.contextPath}/user/add.action" method="POST"> 编号:<input type="text" name="id" value="http://www.mamicode.com/${id}"/><br/> 姓名:<input type="text" name="name" value="http://www.mamicode.com/${name}"/><br/> 薪水:<input type="text" name="sal" value="http://www.mamicode.com/${sal}"/><br/> 入职时间:<input type="text" name="hiredate" value=http://www.mamicode.com/‘ <input type="submit" value="http://www.mamicode.com/注册"/> </form> |
@Controller @RequestMapping(value = "http://www.mamicode.com/user") public class UserAction { @InitBinder protected void initBinder(HttpServletRequest request,ServletRequestDataBinder binder) throws Exception { binder.registerCustomEditor( Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true)); } @RequestMapping(value = "http://www.mamicode.com/add", method = RequestMethod.POST) public String add(int id, String name, double sal, Date hiredate, Model model) throws Exception { System.out.println("HelloAction::add()::POST"); model.addAttribute("id", id); model.addAttribute("name", name); model.addAttribute("sal", sal); model.addAttribute("hiredate", hiredate); return "/register.jsp"; } } |
第二十章在业务控制方法中写入User,Admin多个模型收集参数
1) 可以在业务控制方法中书写1个模型来收集客户端的参数
2) 模型中的属性名必须和客户端参数名一一对应
3) 这里说的模型不是Model对象,Model是向视图中封装的数据
@Controller @RequestMapping(value = "http://www.mamicode.com/user") public class UserAction { @InitBinder protected void initBinder(HttpServletRequest request,ServletRequestDataBinder binder) throws Exception { binder.registerCustomEditor( Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true)); } @RequestMapping(value = "http://www.mamicode.com/add", method = RequestMethod.POST) public String add(User user,Model model) throws Exception { System.out.println("HelloAction::add()::POST"); model.addAttribute("user",user); return "/register.jsp"; } } |
第二十一章在业务控制方法中写入包装User的模型来收集参数
可以在业务控制方法中书写0个或多个模型来收集客户端的参数
1) 如果多个模型中有相同的属性时,可以用user.name或admin.name来收集客户端参数
2) 用一个新的模型将User和Admin再封装一次
User.java
public class User { private Integer id; private String name; private Double sal; private Date hiredate; public User(){} public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Double getSal() { return sal; } public void setSal(Double sal) { this.sal = sal; } public Date getHiredate() { return hiredate; } public void setHiredate(Date hiredate) { this.hiredate = hiredate; } @Override public String toString() { return this.id + ":" + this.name + ":" + this.sal + ":" + this.hiredate; } } |
Bean.java
public class Bean { private User user; private Admin admin; public Bean(){} public User getUser() { return user; } public void setUser(User user) { this.user = user; } public Admin getAdmin() { return admin; } public void setAdmin(Admin admin) { this.admin = admin; } } |
PersonAction.java
@Controller @RequestMapping(value = "http://www.mamicode.com/person") public class PersonAction { @InitBinder protected void initBinder(HttpServletRequest request,ServletRequestDataBinder binder) throws Exception { binder.registerCustomEditor( Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true)); } @RequestMapping(value = "http://www.mamicode.com/add", method = RequestMethod.POST) public String add(Bean bean,Model model) throws Exception { System.out.println(bean.getUser()); System.out.println(bean.getAdmin()); System.out.println("PersonAction::add()::POST"); model.addAttribute("bean",bean); return "/register.jsp"; } } |
register.jsp
普通用户 <form action="${pageContext.request.contextPath}/person/add.action" method="POST"> 编号:<input type="text" name="user.id" value="http://www.mamicode.com/${bean.user.id}"/><br/> 姓名:<input type="text" name="user.name" value="http://www.mamicode.com/${bean.user.name}"/><br/> 薪水:<input type="text" name="user.sal" value="http://www.mamicode.com/${bean.user.sal}"/><br/> 入职时间:<input type="text" name="user.hiredate" value=http://www.mamicode.com/‘ <input type="submit" value="http://www.mamicode.com/注册"/> </form> |
第二十二章在业务控制方法中收集数组参数
批量删除用户
@Controller @RequestMapping(value="http://www.mamicode.com/user") public class UserAction { @RequestMapping(value="http://www.mamicode.com/delete") public String deleteMethod(int[] ids,Model model) throws Exception{ System.out.println("UserAction::deleteMethod()"); System.out.println("需要删除的id为:"); for(int id : ids){ System.out.print(id+" "); } model.addAttribute("message","批量删除成功"); return "/success.jsp"; } } |
第二十三章在业务控制方法中收集List<JavaBean>参数
批量注册用户
UserAction.java
@Controller @RequestMapping(value="http://www.mamicode.com/user") public class UserAction { @RequestMapping(value="http://www.mamicode.com/addAll") public String addAll(Bean bean,Model model) throws Exception{ for(User user : bean.getUserList()){ System.out.println(user.getName()+":"+user.getGender()); } model.addAttribute("message","批量增加用户成功"); return "/success.jsp"; } } |
Bean.java
public class Bean { private List<User> userList = new ArrayList<User>(); public Bean(){} public List<User> getUserList() { return userList; } public void setUserList(List<User> userList) { this.userList = userList; } } |
registerAll.java
<form action="${pageContext.request.contextPath}/user/addAll.action" method="POST">
姓名:<input type="text" name="userList[0].name" value="http://www.mamicode.com/哈哈"/> 性别:<input type="text" name="userList[0].gender" value="http://www.mamicode.com/男"/> <hr/>
姓名:<input type="text" name="userList[1].name" value="http://www.mamicode.com/呵呵"/> 性别:<input type="text" name="userList[1].gender" value="http://www.mamicode.com/男"/> <hr/>
姓名:<input type="text" name="userList[2].name" value="http://www.mamicode.com/嘻嘻"/> 性别:<input type="text" name="userList[2].gender" value="http://www.mamicode.com/女"/> <hr/>
<input type="submit" value="http://www.mamicode.com/批量注册"/>
</form> |
第二十四章结果的转发和重定向
1) 在转发情况下,共享request域对象,会将参数从第一个业务控制方法传入第二个业务控制方法,
反之,重定向则不行
删除id=10号的用户,再查询用户
@Controller @RequestMapping(value="http://www.mamicode.com/user") public class UserAction {
@RequestMapping(value="http://www.mamicode.com/delete") public String delete(int id) throws Exception{ System.out.println("删除用户->" + id); //转发到find() return "forward:/user/find.action"; //重定向到find() //return "redirect:/user/find.action"; }
@RequestMapping(value="http://www.mamicode.com/find") public String find(int id) throws Exception{ System.out.println("查询用户->" + id); return "/success.jsp"; }
} |
第二十五章异步发送表单数据到JavaBean,并响应JSON文本返回
1) 提交表单后,将JavaBean信息以JSON文本形式返回到浏览器
bean2json.jsp
<form> 编号:<input type="text" name="id" value="http://www.mamicode.com/1"/><br/> 姓名:<input type="text" name="name" value="http://www.mamicode.com/哈哈"/><br/> 薪水:<input type="text" name="sal" value="http://www.mamicode.com/5000"/><br/> <input type="button" value="http://www.mamicode.com/异步提交注册"/> </form>
<script type="text/javascript"> $(":button").click(function(){ var url = "${pageContext.request.contextPath}/user/add.action"; var sendData = http://www.mamicode.com/{ "id":1, "name":"哈哈", "sal":5000 }; $.post(url,sendData,function(backData,textStatus,ajax){ alert(ajax.responseText); }); }); </script> |
User.java
public class User { private Integer id; private String name; private Double sal; public User(){} public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Double getSal() { return sal; } public void setSal(Double sal) { this.sal = sal; } } |
UserAction.java
@Controller @RequestMapping(value="http://www.mamicode.com/user") public class UserAction {
@RequestMapping(value="http://www.mamicode.com/add") public @ResponseBody User add(User user) throws Exception{ System.out.println(user.getId()+":"+user.getName()+":"+user.getSal()); return user; }
} |
spring.xml
<!-- Action控制器 --> <context:component-scan base-package="cn.itcast.javaee.springmvc.app25"/>
<!-- 配适器 --> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/> </list> </property> </bean> |
第二十六章员工管理系统--查询员工
1)springmvc + spring + jdbc + oracle
31、springmvc(注解)