springmvc绑定包装pojo

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新建maven项目

springmvc绑定包装pojo_java

导入依赖

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.shrimpking</groupId>
    <artifactId>springtest13</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>p01</module>
        <module>p02</module>
        <module>p03</module>
        <module>p04</module>
        <module>p05</module>
        <module>p06</module>
        <module>p07</module>
        <module>p08</module>
        <module>p09</module>
    </modules>

    <dependencies>
        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.3.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version> 1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.3</version>
        </dependency>
        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
            <version>3.2.4</version>
        </dependency>
        <dependency>
            <groupId>ognl</groupId>
            <artifactId>ognl</artifactId>
            <version>3.1.12</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.22</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>2.1.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.3</version>
        </dependency>
    </dependencies>

    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>
</project>

BanJi.java

package com.shrimpking.pojo;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2023/7/15 10:48
 */
public class BanJi
{
    private Integer id;
    private String banJiName;

    public Integer getId()
    {
        return id;
    }

    public void setId(Integer id)
    {
        this.id = id;
    }

    public String getBanJiName()
    {
        return banJiName;
    }

    public void setBanJiName(String banJiName)
    {
        this.banJiName = banJiName;
    }

    @Override
    public String toString()
    {
        return "BanJi{" + "id=" + id + ", banJiName='" + banJiName + '\'' + '}';
    }
}

Student.java

package com.shrimpking.pojo;

/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2023/7/15 10:53
 */
public class Student
{
    private Integer id;
    private String stuName;
    private String sex;
    private BanJi banJi;

    public Integer getId()
    {
        return id;
    }

    public void setId(Integer id)
    {
        this.id = id;
    }

    public String getStuName()
    {
        return stuName;
    }

    public void setStuName(String stuName)
    {
        this.stuName = stuName;
    }

    public String getSex()
    {
        return sex;
    }

    public void setSex(String sex)
    {
        this.sex = sex;
    }

    public BanJi getBanJi()
    {
        return banJi;
    }

    public void setBanJi(BanJi banJi)
    {
        this.banJi = banJi;
    }

    @Override
    public String toString()
    {
        return "Student{" + "id=" + id + ", stuName='" + stuName + '\'' + ", sex='" + sex + '\'' + ", banJi=" + banJi + '}';
    }
}

StudentController.java

package com.shrimpking.controller;

import com.shrimpking.pojo.BanJi;
import com.shrimpking.pojo.Student;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;


/**
 * Created by IntelliJ IDEA.
 *
 * @Author : Shrimpking
 * @create 2023/7/15 10:56
 * 注意
 * 在使用包装POJO类型数据绑定时，
 * 前端请求的参数名编写必须符合以下两种情况。
 * 1 如果查询条件参数是包装类的直接基本属性，
 * 参数名就直接用对应的属性名，如上述代码中的stuName。
 * 2 如果查询条件参数是包装类中POJO的子属性，
 * 参数名就必须为【对象.属性】，
 * 其中【对象】要和包装POJO中的对象属性名称一致，
 * 【属性】要和包装POJO中的对象子属性一致，
 * 如上述代码中的banJi.banJiName。
 */
@Controller
public class StudentController
{
    //向学生查询页面跳转
    @RequestMapping("/tofind")
    public String toFindStudentWithBanJi()
    {
        return "student";
    }

    //查询学生和班级信息
    @RequestMapping("/findStudent")
    public String findStudentWithBanJi(Student student)
    {
        Integer stuId = student.getId();
        String stuName = student.getStuName();
        String stuSex = student.getSex();
        BanJi banJi = student.getBanJi();
        Integer banJiId = banJi.getId();
        String banJiName = banJi.getBanJiName();
        System.out.println("student:" + student.toString());
        System.out.println("banji:" + banJi.toString());
        return "success";
    }
}

springmvc-config.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: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/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 扫描包   -->
    <context:component-scan base-package="com.shrimpking.controller"/>
    <!--  视图解析器  -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    
    <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:springmvc-config.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>
    <!-- 解决中文乱码   -->
    <filter>
        <filter-name>Encoding</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>
    </filter>
    <filter-mapping>
        <filter-name>Encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

student.jsp

<%--
  Created by IntelliJ IDEA.
  User: user1
  Date: 2023/7/15
  Time: 11:03
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>学生查询</title>
</head>
<body>
    <form method="post" action="${pageContext.request.contextPath}/findStudent">
        学生编号： <input type="text" name="id"><br>
        学生姓名： <input type="text" name="stuName"><br>
        学生性别： <input type="text" name="sex"><br>
        班级编号： <input type="text" name="banJi.id"><br>
        所属班级： <input type="text" name="banJi.banJiName"><br>
        <input type="submit" value="查询">
    </form>
</body>
</html>

success.jsp

<%--
  Created by IntelliJ IDEA.
  User: user1
  Date: 2023/7/15
  Time: 11:04
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>成功</title>
</head>
<body>
    <h2>ok,查询成功</h2>
</body>
</html>

springmvc绑定包装pojo_数据库_02