SpringMVC04 很杂很重要（注解，乱码处理，通配符，域属性调用，校正参数名称，访问路径，请求、响应携带参数，请求方法）

　　1.导入架包

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <parent>
        <artifactId>SpringMVC</artifactId>
        <groupId>cn.happy</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>SpringMVC04Annotation</artifactId>
    <packaging>war</packaging>
    <name>SpringMVC04Annotation Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <!--spring对应的版本号-->
        <spring.version>4.2.1.RELEASE</spring.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.0</version>
            <scope>test</scope>
        </dependency>
        <!--引入需要的spring 核心jar-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>SpringMVC04Annotation</finalName>
    </build>
</project>

　　2.配置中央调度器（乱码处理、处理器）

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>
    
    <filter>
        <filter-name>CharactorEncoding</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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    
    <filter-mapping>
        <filter-name>CharactorEncoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
</web-app>

　　3、配置映射器

<?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">
    <!--扫描包下的路径-->
    <context:component-scan base-package="cn.happy.controller"/>
    <!--根据注解来寻找路径-->
    <mvc:annotation-driven/>
</beans>

　　4.1：视图（登录页面）

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>Login</h2>
<form action="/user/login" method="post">　　　　这里的红色字体要根据RequestMapping的请求方法来进行更换
    登陆名:<input name="name"/>　　　　　　　　　　　　校正参数名称时，这里要改成　　　　uname
    汽车品牌1:<input name="userCars[0].brand"/>
    汽车品牌2:<input name="userCars[1].brand"/>
    <input type="submit" value="登录"/>
</form>
</body>
</html>

　　4.2：登录成功页面

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>Success!</h2>
<%--${uname}--%>　　　　　在最后一个案例要放开注解
<%--${list}--%>　　　　　　在最后一个案例要放开注解
</body>
</html>

　　5.1：实体类（用户）

import java.util.List;
public class UserInfo {
    private String name;
    private Car car;
    private List<Car> userCars;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Car getCar() {
        return car;
    }
    public void setCar(Car car) {
        this.car = car;
    }
    public List<Car> getUserCars() {
        return userCars;
    }
    public void setUserCars(List<Car> userCars) {
        this.userCars = userCars;
    }
}

　　5.2：实体类（用户的域属性）

public class Car {
    private String brand;
    public String getBrand() {
        return brand;
    }
    public void setBrand(String brand) {
        this.brand = brand;
    }
}

　　6.处理器（通配符的用法、请求方法的定义）

import cn.happy.bean.UserInfo;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.ArrayList;
@Controller
@RequestMapping("/user")
public class FirstController {
    //*代表0个或者多个字符，以带有first的字符，或者开头、结尾就行
    @RequestMapping("/*first*")
    public String doFirst() {
        return "/success.jsp";
    }

//**:0级或者是无限极目录
    @RequestMapping("/**/second")
    public String doSecond() {
        return "/success.jsp";
    }

 

//*：有且只能有一级目录，不能是空目录
    @RequestMapping(value = "/*/third", method = RequestMethod.GET)
    public String doThird() {
        return "/success.jsp";
    }

//对象的属性获取和自定义类型的属性获取
    @RequestMapping("/login")
    public String doFirst(UserInfo info) {
        System.out.println(info.getName());
        System.out.println(info.getUserCars().get(0).getBrand());
        System.out.println(info.getUserCars().get(1).getBrand());
        return "/success.jsp";
    }

　　　　跳转到
　　　　控制台

　　　//校正参数名称　　　　将上方的请求路径更改成/user/second　　　　和表单元素的name属性保持一致，即可实现自动装配
    @RequestMapping("/second")
    public String doSecond(@RequestParam(value = "uname", required = false) String info) {
        System.out.println(info);
        return "/success.jsp";
    }

　　　　跳转到

　　　　控制台

//路径变量
    @RequestMapping("/{runame}/{uage}/third")
    public String Third(@PathVariable("runame") String uname, @PathVariable String uage) {
        System.out.println(uname);
        System.out.println(uage);
        return "/success.jsp";
    }
　　　　控制台

//session和Model的使用
    @RequestMapping(value = "/four")
    public String doFirst(HttpServletRequest request, HttpServletResponse response, HttpSession session, Model model) {
        session.setAttribute("uname", "happy");
        model.addAttribute("list", new ArrayList<String>());
        return "/success.jsp";
    }

}