用注解实现springMVC

最新推荐文章于 2024-08-19 19:55:55 发布

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最新推荐文章于 2024-08-19 19:55:55 发布

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分类专栏： springMVC

本文链接：https://blog.youkuaiyun.com/qq_35854462/article/details/77368914

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本文介绍了一个使用Spring MVC实现的数据绑定示例项目，包括项目搭建步骤、所需依赖库及配置文件详解。通过创建实体类、配置Spring MVC及前端控制器等操作，实现了不同类型的HTTP请求参数传递，并展示了如何在控制器中接收这些参数。

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1.创建Webmaven项目

2.导入所需要的jar包

  <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.1</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-dbcp/commons-dbcp -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.12</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.12</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax/javaee-api -->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>

3.创建两个实体类和两个jsp

Book实体类

public class Book {
    private String bookname;

    public String getBookname() {
        return bookname;
    }

    public void setBookname(String bookname) {
        this.bookname = bookname;
    }
}

UserInfo实体类

   private String uname;
    private  Book book;
    private List<Book> bookList;

<body>
<form  method="post" action="${pageContext.request.contextPath}/five">
    用户名<input name="uname"/>
    图书名（域属性）<input name="book.bookname"/>
    图书名(域属性集合)<input name="bookList[0].bookname"/>

           <input type="submit">
</form>
</body>

跳转页面

4.配置springmvc.xml(用于扫描注解)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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

">
    <!--注解扫描-->
  <context:component-scan base-package="cn.happy.Annotation"></context:component-scan>
</beans>

5.在web.xml配置前端控制器

<servlet>
    <servlet-name>springmvc</servlet-name>
    <!--引入前端控制器-->
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <!--映射springMVC.xml-->
      <param-value>classpath:springMVC_Annotation.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>

6.创建控制器

//控制器
@Controller
//访问路径
@RequestMapping("/User")
public class MyControler {

    @RequestMapping("/first")
    public String doFirst(){

        return"/WEB-INF/index.jsp";
    }
    @RequestMapping("/second")
    //测试传输单个值
    public String doSecond(String uname){
        System.out.println(uname);
        return "/WEB-INF/index.jsp";
    }
    @RequestMapping("/third")
    //传输打单个对象
    public String doThird(UserInfo userInfo){
        System.out.println(userInfo.getUname());
        return "/WEB-INF/index.jsp";
    }

    //传输域属性
    @RequestMapping("/four")
    public String doFour(UserInfo userInfo){
        System.out.println(userInfo.getUname()+"\t"+userInfo.getBook().getBookname());
        return "/WEB-INF/index.jsp";
    }
    //传输域属性集合
    @RequestMapping("/five")
    public String doFive(UserInfo userInfo){
        System.out.println(userInfo.getUname()+userInfo.getBookList().get(0).getBookname());
        return "/WEB-INF/index.jsp";
    }

    //路径变量（获取路径中的值）
    @RequestMapping("/{uname}/{upwd}/six")
    public String doSix(@PathVariable("uname") String name,@PathVariable("upwd") String pwd){

        System.out.println(name+pwd);
        return  "/WEB-INF/index.jsp";
    }
}