Spring小Demo实现页面跳转

目标：通过xml方式配置实现操作数据库并跳转到操作结果页面

步骤一：创建Maven-web项目，并在创建好的项目添加resources及java文件夹，分别将其置为resources及root根目录

创建后此时项目目录中没有存放java源程序的目录及存放资源的目录

手动在main中添加目录并分别右键Mark As->source root ，resources root，完成后如图

步骤二：配置pom.xml，其中包括所需依赖及运行项目所用jetty插件

<?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.germa</groupId>
  <artifactId>SpringWebDemo</artifactId>
  <version>1.0</version>
  <name>SpringWebDemo</name>
  <dependencies>
    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>2.2</version>
    </dependency>
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>${commons-dbcp.version}</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>${servlet.version}</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-orm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <!-- jetty插件 -->
      <plugin>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>maven-jetty-plugin</artifactId>
        <version>6.1.25</version>
        <configuration>
          <connectors>
            <connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">
              <port>80</port>
              <maxIdleTime>60000</maxIdleTime>
            </connector>
          </connectors>
          <contextPath>/SpringWebDemo</contextPath>
          <scanIntervalSeconds>0</scanIntervalSeconds>
        </configuration>
      </plugin>
    </plugins>
  </build>

  <properties>
    <file.encoding>UTF-8</file.encoding>
    <spring.version>4.2.2.RELEASE</spring.version>
    <mysql.version>5.1.29</mysql.version>
    <servlet.version>3.0-alpha-1</servlet.version>
    <commons-dbcp.version>1.4</commons-dbcp.version>
    <jetty.version>8.1.8.v20121106</jetty.version>
  </properties>
</project>

步骤三：在WEB-INF目录下添加要跳转的页面及web的配置文件web.xml,如下：

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <servlet-name>user</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-web.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>user</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
</web-app>

jsp页面：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改失败!</title>
</head>
<body>
修改失败!
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改成功!</title>
</head>
<body>
修改成功!
</body>
</html>

步骤四：在resources目录下配置web层的spring-web.xml文件及jdbc.properties

jdbc.properties:

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/sampledb
jdbc.username=root
jdbc.password=wbhzanlhehe1020

spring-web.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"
       xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
    <context:component-scan base-package="com.germa.web"/>
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
          destroy-method="close"
          p:driverClassName="${jdbc.driverClassName}"
          p:url="${jdbc.url}"
          p:username="${jdbc.username}"
          p:password="${jdbc.password}"/>

    <bean id="jdbcTemplate"
          class="org.springframework.jdbc.core.JdbcTemplate"
          p:dataSource-ref="dataSource"/>

    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
          p:dataSource-ref="dataSource"/>

    <tx:annotation-driven/>

    <!-- 启动Spring MVC的注解功能-->
    <mvc:annotation-driven/>

    <!-- 模型视图名称的解析，即在模型视图名称添加前后缀 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          p:prefix="/WEB-INF/jsp/" p:suffix=".jsp"/>
</beans>

步骤五：编写处理请求的控制器（由于只为验证页面跳转，故将web，service，dao三层合一为web层）

package com.germa.web;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class SpringWebDemo {
    @Autowired
    private JdbcTemplate jdbcTemplate=new JdbcTemplate();
    @RequestMapping("/logon.do")
    @Transactional
    public String logon(String username){
        if(username.equals("germa")) {
            String sql = "update t_user set credits=credits+5 where user_name='germa'";
            jdbcTemplate.update(sql);
            return "success";
        }
        else
        {
            return "fail";
        }
    }
}

步骤六：

点击jetty插件中run运行jetty插件

并在浏览器中输入 http://localhost/SpringWebDemo/logon.do?username=germa

此时会跳转到success.jsp页面

当传过去的username不等于germa时，则会跳转到fail页面

Spring小Demo实现页面跳转

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