处理post乱码和如何通过后台弹出窗口

当我们输入中文提交后，往往会出现乱码！

乱码示例

1、get方式提交产生乱码，SpringMVC框架自动帮我们装配好了，一般我们不需要配置

图片.png

2、post方式提交，一般需要我们在web.xml中手动配置

 <!--处理post乱码-->
  <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>

3、我们重新配置一个测试

项目整体架构

3.1、配置pom.xml文件

<dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>

    <!-- Spring的核心工具包-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>

    <!--在基础IOC功能上提供扩展服务，还提供许多企业级服务的支持，有邮件服务、任务调度、远程访问、缓存以及多种视图层框架的支持-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>

    <!-- Spring IOC的基础实现，包含访问配置文件、创建和管理bean等 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>

    <!-- Spring context的扩展支持，用于MVC方面 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>

    <!-- Spring表达式语言 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>

    <!--springAop开发必须加入的包-->
    <dependency>
      <groupId>aopalliance</groupId>
      <artifactId>aopalliance</artifactId>
      <version>1.0</version>
    </dependency>

    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.8.13</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>5.0.8.RELEASE</version>
    </dependency>
  </dependencies>

3.2、配置web.xml

 <servlet>
    <servlet-name>springMvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--加载spring配置文件，原来是通过 ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>springMvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!--处理post乱码-->
  <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>

3.3、配置Spring.xml文件

<?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:p="http://www.springframework.org/schema/p"
       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controller-->
    <context:component-scan base-package="com"></context:component-scan>
    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--jsp所在位置-->
        <property name="prefix" value="/"></property>
        <!--jsp文件后缀名-->
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

3.4、index.jsp和success.jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<h2>Hello World!</h2>
<form method="post" action="/test">
    <input type="text" name="username"/><br/>
    <input type="text" name="password"><br/>
    <input type="submit" value="提交">
</form>
</body>
</html>

<%--
  Created by IntelliJ IDEA.
  User: Mr Wei
  Date: 2020/10/28
  Time: 13:54
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" isELIgnored="false" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>测试成功！</h1>
username:${uname}
</body>
</html>

3.5、Controller测试类

package com.fan.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class TestController {

    @RequestMapping("/test")
    public String test(String username, ModelMap modelMap){
        System.out.println(username);
        modelMap.addAttribute("uname",username);
        return "success";
    }
}

3.6、启动tomcat测试

提交页面
接收页面

4、如何通过后台弹出窗口

示例