springmvc的注解式开发
1 简写前后缀
public class Frist implements Controller { public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception { ModelAndView mx=new ModelAndView(); mx.setViewName("index"); return mx; } }
在spring中加入了
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean>
这么写就行了
关于静态资源无法访问的问题
3种解决方案
1 web.xml中加mapping
<!--<servlet-mapping>--> <!--<servlet-name>default</servlet-name>--> <!--<url-pattern>*.PNG</url-pattern>--> <!--</servlet-mapping>--> <!--<servlet-mapping>--> <!--<servlet-name>default</servlet-name>--> <!--<url-pattern>*.jpg</url-pattern>--> <!--</servlet-mapping>-->
直接加入mapping 什么类型就写什么 .什么结尾
2
<mvc:default-servlet-handler></mvc:default-servlet-handler>
在spring中加入这一行就行
3
<mvc:resources mapping="/img/**" location="/img/"></mvc:resources>
加入这个 后面陪路径
现在来讲简写类的id
<bean id="send" class="springmmv.cn.dao.Frist"></bean>
这个是哪个类的bean节点 ，这里的id改为了send ，有两种
1
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="urlMap"> <map> <entry key="/la" value="send"></entry> </map> </property> </bean>
2
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <!--<property name="mappings">--> <!--<props>--> <!--<prop key="/la">df</prop>--> <!--</props>--> <!--</property>--> </bean>
urlMap mappings
我们访问是，还是写/la就行
现在我们来改写类
我们让她继承一下
AbstractController
public class Frist extends AbstractController { protected ModelAndView handleRequestInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception { ModelAndView mx=new ModelAndView(); mx.setViewName("index"); return mx; } }
之后 ，spring的配置文件 要改写
<bean id="send" class="springmmv.cn.dao.Frist"> <property name="supportedMethods" value="GET,POST"></property> </bean>
改成这样就可以了
参数自动装配（四种）
package demo08ParamAuto01.AutoWire; import java.util.List; /** * Created by mycom on 2018/3/26. */ public class UserInfo { private String username; private String password; private Car car; private List<Car> list; public List<Car> getList() { return list; } public void setList(List<Car> list) { this.list = list; } public Car getCar() { return car; } public void setCar(Car car) { this.car = car; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
package demo08ParamAuto01.AutoWire;
/**
* Created by mycom on 2018/3/26.
*/
public class Car {
private String brand;
public String getBrand() {
return brand;
}
public void setBrand(String brand) {
this.brand = brand;
}
}
package demo08ParamAuto01.AutoWire;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* Created by mycom on 2018/3/26.
*/
@Controller
public class UserInfoController {
@RequestMapping("/login")
public String doLogin(String username, String password, Model model){
model.addAttribute("username",username);
System.out.println(username);
System.out.println(password);
return "success";
}
@RequestMapping("/loginUserInfo")
public String doLoginUserInfo(UserInfo info, Model model){
model.addAttribute("username",info.getUsername());
System.out.println(info.getUsername());
System.out.println(info.getPassword());
return "success";
}
@RequestMapping("/loginUserInfoCar")
public String doLoginUserInfoCar(UserInfo info, Model model){
model.addAttribute("username",info.getUsername());
System.out.println(info.getUsername());
System.out.println(info.getPassword());
System.out.println(info.getCar().getBrand());
return "success";
}
@RequestMapping("/loginUserInfoList")
public String doLoginUserInfoList(UserInfo info, Model model){
model.addAttribute("username",info.getUsername());
System.out.println(info.getUsername());
System.out.println(info.getPassword());
System.out.println(info.getCar().getBrand());
System.out.println(info.getList().get(0).getBrand());
System.out.println(info.getList().get(1).getBrand());
return "success";
}
}
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.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">
<context:component-scan base-package="demo08ParamAuto01.AutoWire"></context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
配置文件的扫描，之前都有
现在给一下，页面 jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/loginUserInfoList" method="post">
用户名：<input name="username"/>
密码：<input name="password"/>
车：<input name="car.brand">
车1：<input name="list[0].brand">
车2：<input name="list[1].brand">
名：<input name="uname">
<input type="submit" value="提交">
</form>
</body>
</html>
2.路径变量 @PathVariable
路径参数类似请求参数，但没有key部分，只是一个值。例如下面的URL:
http://localhost:9090/showUser/spring
其中的spring是表示用户的密码字符串。在Spring MVC中，spring被作为路径变量用来发送一个值到服务器。Sping 3以后Spring 3以后支持注解@PathVariable用来接收路径参数。为了使用路径变量，首先需要在RequestMapping注解的值属性中添加一个变量，该变量必须放在花括号之间
@RequestMapping("/loginUserInfoPath/{username}")
public String doLoginUserInfoPath(@PathVariable("username") String uname,String username){
System.out.println(uname);
System.out.println(username);
return "success";
}
不要忘记修改web.xml和springmvc.xml的配置文件的路径和包的路径
在页面上
<%--
Created by IntelliJ IDEA.
User: mycom
Date: 2018/3/26
Time: 11:57
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/loginUserInfoPath/happy" method="post">
用户名：<input name="username"/>
<input type="submit" value="提交">
</form>
</body>
</html>
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