SpringMVC控制器,日期转换器，编码过滤器

时间: 2020-09-18｜41次围观｜0 条评论

one

org.springframework.web.servlet.mvc.ParameterizableViewController
如果请求是/hello.action的请求路径，则直接跳转到/jsp/success.jsp页面，不经过程序员定义的控制器Action。

目录结构

控制流程

pom.xml

<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">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.springapp</groupId>
    <artifactId>SpringMVC004</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>SpringMVC004</name>

    <properties>
        <spring.version>3.2.0.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.1</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.8.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <finalName>SpringMVC004</finalName>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <includes>
                        <include>**/*Tests.java</include>
                    </includes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

web.xml

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>Spring MVC Application</display-name>

    <!--注册SpringMVC的核心控制器-->
    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <!--通知DispatcherServlet去指定的目录下加载springmvc.xml-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value >WEB-INF/mvc-dispatcher-servlet.xml</param-value>
            <!--<param-value >classpath:springmvc.xml</param-value>-->
        </init-param>

        <!--启动时加载-->
        <!--<load-on-startup>1</load-on-startup>-->
    </servlet>

    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>emp.jsp</welcome-file>
    </welcome-file-list>

</web-app>

mvc-dispatcher-servlet.xml

<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">

    <!--控制器Action（无）-->
    <!--映射器（无）-->
    <!--适配器（无）-->
    <!--视图解析器（无）-->

    <!--专用jsp到jsp/html的转发控制器-->
    <bean name="/index.action" class="org.springframework.web.servlet.mvc.ParameterizableViewController">
        <!--转发到视图名-->
        <property name="viewName" value="/WEB-INF/pages/index.jsp" />
    </bean>

</beans>

emp.jsp

<%@ page language="java" pageEncoding="UTF-8" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <title>演示两个控制器</title>
</head>

<body>
<a href="${pageContext.request.contextPath}/index.action" style="text-decoration: none">进入首页</a>

</body>
</html>

index.jsp

<%@ page language="java" pageEncoding="UTF-8" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <title>首页</title>
    </head>

    <body>
        <%--<font style="font-size: 111px">员工管理系统</font>--%>


        <div class="container-fluid">
            <div class="row-fluid">
                <div class="span2">
                </div>
                <div class="span6">
                    <div class="hero-unit">
                        <h1>
                            Hello, world!
                        </h1>
                        <p>
                            这是一个可视化布局模板, 你可以点击模板里的文字进行修改, 
                            也可以通过点击弹出的编辑框进行富文本修改. 拖动区块能实现排序.
                        </p>
                        <p>
                            <a class="btn btn-primary btn-large" href="#">参看更多 »</a>
                        </p>
                    </div>
                </div>
                <div class="span4">
                </div>
            </div>
        </div>
    </body>
</html>

执行结果

two

org.springframework.web.servlet.mvc.AbstractCommandController
能够以实体的形式，收集客户端参数。

目录结构

控制流程

pom.xml

<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">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.springapp</groupId>
    <artifactId>SpringMVC005</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>SpringMVC005</name>

    <properties>
        <spring.version>3.2.0.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.1</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.8.2</version>
            <scope>test</scope>
        </dependency>

        <!--<dependency> <groupId>javax.servlet.jsp.jstl</groupId> <artifactId>jstl</artifactId> <version>1.0</version> </dependency>-->

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!--<dependency> <groupId>javax.servlet.jsp.jstl</groupId> <artifactId>javax.servlet.jsp.jstl-api</artifactId> <version>1.2.1</version> </dependency>-->

    </dependencies>

    <build>
        <finalName>SpringMVC005</finalName>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <configuration>
                    <includes>
                        <include>**/*Tests.java</include>
                    </includes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

web.xml

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>Spring MVC Application</display-name>

    <!--注册SpringMVC的核心控制器-->
    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <!--通知DispatcherServlet去指定的目录下加载springmvc.xml-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value >WEB-INF/mvc-dispatcher-servlet.xml</param-value>
            <!--<param-value >classpath:springmvc.xml</param-value>-->
        </init-param>

        <!--启动时加载-->
        <!--<load-on-startup>1</load-on-startup>-->
    </servlet>

    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>



    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>emp.jsp</welcome-file>
    </welcome-file-list>


    <!--编码过滤器 仅限于本项目中的POST方式-->
    <!--注册Spring提供的针对POST请求的中文乱码问题-->
    <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>

</web-app>

mvc-dispatcher-servlet.xml

<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">

    <context:component-scan base-package="com.springapp.mvc"/>



    <!--注册Action-->
    <bean name="/add.action" class="com.springapp.mvc.EmpAction"></bean>

    <!--映射器-->
    <!-- 适配器(SimpleControllerHandlerAdapter去找实现了Controller接口的Action 也能去找继承了AbstractCommandController类的Action ) -->
    <!--视图解析器-->
</beans>

emp.jsp

<%@ page language="java" pageEncoding="UTF-8" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <title>演示两个控制器</title>
    </head>

<body>
    <form action="${pageContext.request.contextPath}/add.action" method="POST">
        <table border="2" align="center">
            <tr>
                <th>姓名</th>
                <td>
                    <input type="text" name="username" />
                </td>
            </tr>

            <tr>
                <th>性别</th>
                <td>
                    <input type="radio" name="gender" value="male" />男
                    <input type="radio" name="gender" value="female" checked />女
                </td>
            </tr>
            <tr>
                <th>入职时间</th>
                <td>
                    <input type="text" name="hiredate" value="2015-11-17" />
                </td>
            </tr>
            <tr>
                <td colspan="2" align="center">
                    <input type="submit" value="提交"/>
                </td>
            </tr>
        </table>
    </form>
</body>
</html>

Emp.java

package com.springapp.mvc;

import java.util.Date;

/** * Created by liguodong on 2015/11/17. */
public class Emp {
    private String username;//姓名
    private String gender;//性别

    private Date hiredate;//入职时间
    public Date getHiredate() {
        return hiredate;
    }
    public void setHiredate(Date hiredate) {
        this.hiredate = hiredate;
    }

    public Emp(){}

    public String getUsername() {
        return username;
    }

    public String getGender() {
        return gender;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }
}

EmpAction.java

package com.springapp.mvc;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindException;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractCommandController;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.text.SimpleDateFormat;
import java.util.Date;

/** * 单例 * 处理类 */
public class EmpAction extends AbstractCommandController{

    public EmpAction() {
        //将表单参数封装到Emp对象中去
        this.setCommandClass(Emp.class);
        System.out.println("EmpAction()");
    }


    /** * 自定义类型转换器，将String->Date类型（格式：yyyy-MM-dd） */
    @Override
    protected void initBinder(HttpServletRequest request,
                              ServletRequestDataBinder binder)
            throws Exception {
        //向SpringMVC内部注入一个自定义的类型转换器
        //参数一：将String转成什么类型的字节码
        //参数二：自定义转换规则
        binder.registerCustomEditor(Date.class,
                /*第一个参数表示以什么格式转换，第二个参数表示转换的字段是否允许为空。true表示允许为空。*/
                new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true));//yyyy-MM-dd HH:mm:ss
    }

    /** * @param request * @param response * @param command 表示封装后的实体 * @param errors 表示封装是产生的异常 * @return * @throws Exception */
    @Override
    protected ModelAndView handle(HttpServletRequest request,
                                  HttpServletResponse response,
                                  Object command,
                                  BindException errors)
            throws Exception {


        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("massage","增加员工成功");

        System.out.println("handle()");

        Emp emp = (Emp) command;

        System.out.println(emp.getUsername()+" : "+emp.getGender()+" : "+emp.getHiredate().toLocaleString());

        //将Emp封装到ModelAndView对象中
        modelAndView.addObject("emp",emp);


        modelAndView.setViewName("/WEB-INF/pages/hello.jsp");

        return modelAndView;
    }
}

hello.jsp

<%@ page language="java" pageEncoding="UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
hello.jsp<br/>
成功<br/>
request:${requestScope.massage}<br/>
姓名：${requestScope.emp.username}<br/>
性别：${requestScope.emp.gender}<br/>
入职时间：${requestScope.emp.hiredate}<br/>
入职时间：<fmt:formatDate  value="${requestScope.emp.hiredate}" type="both" dateStyle="LONG" />

        <%-- 1、<fmt:formDate>来源于http://java.sum.com/jsp/jstl/fmt 2、<fmt:formDate>作用是格式化日期的显示，例如：2015年11月17日 星期二 3、value表示需要格式化的值 4、type表示显示日期还是时间，还是都显示 type=date表示只显示日期 type=time表示只显示时间 type=both表示日期时间均显示 5、dateStyle表示显示日期的格式：SHORT/medium/DEFAULT/LONG/FULL --%>
</body>
</html>

运行结果

原文链接：https://blog.csdn.net/scgaliguodong123_/article/details/49993611

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