SpringMVC請求引數繫結(用法)
阿新 • • 發佈:2018-12-18
目錄
1.把請求資料封裝到JavaBean類中
(1)自定義一個JavaBean類
package com.heima.domain; import java.io.Serializable; public class Account implements Serializable { private String username; private String password; private Integer money; private User user ; public User getUser() { return user; } public void setUser(User user) { this.user = user; } 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; } public Integer getMoney() { return money; } public void setMoney(Integer money) { this.money = money; } @Override public String toString() { return "Account{" + "username='" + username + '\'' + ", password='" + password + '\'' + ", money=" + money + ", user=" + user + '}'; } }
(2)測試JSP(form表單中的name屬性要和JavaBean類中的屬性一致才能成功封裝)
<%-- Created by IntelliJ IDEA. User: FANG2 Date: 2018/10/29 Time: 15:19 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <%--把資料封裝Account類中--%> <form action="Spring/saveAccount" method="post"> 姓名:<input type="text" name="username" /><br/> 密碼:<input type="text" name="password" /><br/> 金額:<input type="text" name="money" /><br/> 使用者姓名:<input type="text" name="user.uname" /><br/> 使用者年齡:<input type="text" name="user.age" /><br/> <input type="submit" value="提交" /> </form> </body> </html>
(3)編寫測試類(只需要在方法引數中定義JavaBean類物件,就可以直接封裝)
package com.heima.controller; import com.heima.domain.Account; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller @RequestMapping("Spring") public class AccountController { /** * 請求引數繫結把資料封裝到JavaBean類中 * @param account * @return */ @RequestMapping("/saveAccount") public String saveAccount(Account account){ System.out.println(account); return "success"; } }
(4)測試結果
2.配置請求引數繫結中文亂碼的過濾器
(過濾器的配置一定要在前端控制器的前面,不然會報錯)
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!--配置解決中文亂碼的過濾器-->
<filter>
<filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--配置前端控制器-->
<servlet>
<servlet-name>SpringMVCDispatcherServlet</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<!-- 配置初始化引數,用於讀取 SpringMVC 的配置檔案 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:SpringMVC.xml</param-value>
</init-param>
<!-- 配置 servlet 的物件的建立時間點:應用載入時建立。
取值只能是非 0 正整數,表示啟動順序 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVCDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>