【SpringMVC】010-SSM框架整合

た入场券 2023-10-05 08:41 32阅读 0赞

# 一、整合说明 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70][]

# 二、搭建环境 #

## 第一步：创建项目 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 1][]

## 第二步：设置项目信息 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 2][]

## 第三步：添加坐标到pom.xml ##

<?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>org.example</groupId>
      <artifactId>SSM</artifactId>
      <version>1.0-SNAPSHOT</version>
      <packaging>war</packaging>
    
      <name>SSM Maven Webapp</name>
      
      <url>http://www.example.com</url>
    
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <spring.version>5.2.8.RELEASE</spring.version>
        <slf4j.version>1.7.30</slf4j.version>
        <log4j.version>1.2.17</log4j.version>
        <mysql.version>8.0.21</mysql.version>
        <mybatis.version>3.5.5</mybatis.version>
      </properties>
    
      <dependencies>
        
        
        <dependency>
          <groupId>org.aspectj</groupId>
          <artifactId>aspectjweaver</artifactId>
          <version>1.9.6</version>
        </dependency>
    
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-aop</artifactId>
          <version>${spring.version}</version>
        </dependency>
    
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>${spring.version}</version>
        </dependency>
    
    
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>${spring.version}</version>
        </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>org.springframework</groupId>
          <artifactId>spring-tx</artifactId>
          <version>${spring.version}</version>
        </dependency>
    
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>${spring.version}</version>
        </dependency>
    
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.13</version>
          <scope>test</scope>
        </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>2.5</version>
          <scope>provided</scope>
        </dependency>
    
        <dependency>
          <groupId>javax.servlet.jsp</groupId>
          <artifactId>jsp-api</artifactId>
          <version>2.2</version>
          <scope>provided</scope>
        </dependency>
    
        <dependency>
          <groupId>jstl</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
        </dependency>
    
        
        <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>${log4j.version}</version>
        </dependency>
    
        <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-api</artifactId>
          <version>${slf4j.version}</version>
        </dependency>
    
        <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
          <version>${slf4j.version}</version>
        </dependency>
        
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>${mybatis.version}</version>
        </dependency>
    
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>2.0.5</version>
        </dependency>
    
        <dependency>
          <groupId>c3p0</groupId>
          <artifactId>c3p0</artifactId>
          <version>0.9.1.2</version>
          <type>jar</type>
          <scope>compile</scope>
        </dependency>
      </dependencies>
    
      <build>
        <finalName>SSM</finalName>
        <pluginManagement>
          <plugins>
            <plugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-compiler-plugin</artifactId>
              <version>3.2</version>
              <configuration>
                <source>1.8</source>
                <target>1.8</target>
                <encoding>UTF-8</encoding>
                <showWarnings>true</showWarnings>
              </configuration>
            </plugin>
            <plugin>
              <artifactId>maven-clean-plugin</artifactId>
              <version>3.1.0</version>
            </plugin>
            
            <plugin>
              <artifactId>maven-resources-plugin</artifactId>
              <version>3.0.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-compiler-plugin</artifactId>
              <version>3.8.0</version>
            </plugin>
            <plugin>
              <artifactId>maven-surefire-plugin</artifactId>
              <version>2.22.1</version>
            </plugin>
            <plugin>
              <artifactId>maven-war-plugin</artifactId>
              <version>3.2.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-install-plugin</artifactId>
              <version>2.5.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-deploy-plugin</artifactId>
              <version>2.8.2</version>
            </plugin>
          </plugins>
        </pluginManagement>
      </build>
    </project>

## 第四步：创建先关文件夹及类、接口 ##

### AccountController类： ###

package com.zibo.controller;
    
    //账户web
    public class AccountController {
    
    }

### AccountDao接口： ###

package com.zibo.dao;
    
    import com.zibo.domain.Account;
    
    import java.util.List;
    
    //账户dao接口
    public interface AccountDao {
        //查询所有账户信息
        public List<Account> findAll();
    
        //保存账户信息
        public void saveAccount(Account account);
    
    }

### Account类： ###

package com.zibo.domain;
    
    //账户
    public class Account {
        private Integer id;
        private String name;
        private Double money;
    
        public Integer getId() {
            return id;
        }
    
        public void setId(Integer id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public Double getMoney() {
            return money;
        }
    
        public void setMoney(Double money) {
            this.money = money;
        }
    }

### AccountService接口： ###

package com.zibo.service;
    
    import com.zibo.domain.Account;
    
    import java.util.List;
    
    public interface AccountService {
        //查询所有账户信息
        public List<Account> findAll();
    
        //保存账户信息
        public void saveAccount(Account account);
    }

### AccountServiceImpl实现类： ###

package com.zibo.service.impl;
    
    import com.zibo.domain.Account;
    import com.zibo.service.AccountService;
    
    import java.util.List;
    
    public class AccountServiceImpl implements AccountService {
        @Override
        public List<Account> findAll() {
            System.out.println("业务层：查询所有账户信息");
            return null;
        }
    
        @Override
        public void saveAccount(Account account) {
            System.out.println("业务层：保存账户");
        }
    }

### 文件位置图： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 3][]

### 备注： ###

其他文件为默认；

# 三、编写Spring框架 #

## 1、添加Spring配置文件（applicationContext.xml） ##

## 2、添加log4j配置文件（log4j.properties） ##

# Set root category priority to INFO and its only appender to CONSOLE.
    #log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
    log4j.rootCategory=info, CONSOLE, LOGFILE
    
    # Set the enterprise logger category to FATAL and its only appender to CONSOLE.
    log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
    
    # CONSOLE is set to be a ConsoleAppender using a PatternLayout.
    log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
    log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
    log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
    
    # LOGFILE is set to be a File appender using a PatternLayout.
    log4j.appender.LOGFILE=org.apache.log4j.FileAppender
    log4j.appender.LOGFILE.File=d:\axis.log
    log4j.appender.LOGFILE.Append=true
    log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
    log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

## 3、为AccountServiceImpl添加注解 ##

package com.zibo.service.impl;
    
    import com.zibo.domain.Account;
    import com.zibo.service.AccountService;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    @Service("accountService")
    public class AccountServiceImpl implements AccountService {
        @Override
        public List<Account> findAll() {
            System.out.println("业务层：查询所有账户信息");
            return null;
        }
    
        @Override
        public void saveAccount(Account account) {
            System.out.println("业务层：保存账户");
        }
    }

# 四、编写Spring MVC框架 #

## 1、修改默认的web.xml文件 ##

<!DOCTYPE web-app PUBLIC
     "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
     "http://java.sun.com/dtd/web-app_2_3.dtd" >
    
    <web-app>
      <display-name>Archetype Created Web Application</display-name>
      
      <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        
        <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        
        <load-on-startup>1</load-on-startup>
      </servlet>
      <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>
    
      
      <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>

##  ##

## 2、添加spring-mvc.xml配置文件 ##

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd">
    
        
        <context:component-scan base-package="com.zibo">
            <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
        </context:component-scan>
    
        
        <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/pages/"/>
            <property name="suffix" value=".jsp"/>
        </bean>
    
        
        <mvc:resources location="/css/" mapping="/css/**" />
        <mvc:resources location="/images/" mapping="/images/**" />
        <mvc:resources location="/js/" mapping="/js/**" />
    
        
        <mvc:annotation-driven/>
    
    </beans>

## 3、修改index.jsp页面 ##

## 4、修改控制器AccountController类 ##

package com.zibo.controller;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    //账户web
    @Controller
    @RequestMapping("/account")
    public class AccountController {
    
        @RequestMapping("/findAll")
        public String findAll(){
            System.out.println("表现层：查询所有账户信息！");
            return "list";
        }
    
    }

## 5、配置tomcat服务器 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 4][]

## 6、运行结果 ##

### 控制台： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 5][]

### 浏览器： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 6][]

# 五、Spring整合Spring MVC框架 #

## 1、原理分析 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 7][]

## 2、在web.xml中配置spring监听器 ##

<!DOCTYPE web-app PUBLIC
     "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
     "http://java.sun.com/dtd/web-app_2_3.dtd" >
    
    <web-app>
      <display-name>Archetype Created Web Application</display-name>
    
    
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
    
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
      </context-param>
      
      <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        
        <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        
        <load-on-startup>1</load-on-startup>
      </servlet>
      <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>
    
      
      <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>

## 3、修改控制器类，使用依赖注入 ##

package com.zibo.controller;
    
    import com.zibo.service.AccountService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import javax.annotation.Resource;
    
    //账户web
    @Controller
    @RequestMapping("/account")
    public class AccountController {
    
        @Resource(name = "accountService")
        private AccountService accountService;
    
        @RequestMapping("/findAll")
        public String findAll(){
            System.out.println("表现层：查询所有账户信息！");
            accountService.findAll();
            return "list";
        }
    
    }

## 4、运行结果 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 8][]

# 六、编写Mybatis框架 #

## 1、添加mybatis配置文件 ##

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE configuration
            PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
            "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
        
        <properties resource="jdbcConfig.properties"/>
        
        <environments default="mysql">
            <environment id="mysql">
                
                <transactionManager type="JDBC"/>
                <dataSource type="pooled">
                    <property name="driver" value="${jdbc.driver}"/>
                    <property name="url" value="${jdbc.url}"/>
                    <property name="username" value="${jdbc.username}"/>
                    <property name="password" value="${jdbc.password}"/>
                </dataSource>
            </environment>
        </environments>
    
        
        <mappers>
            <mapper class="com.zibo.dao.AccountDao"/>
        </mappers>
    </configuration>

## 2、数据源配置文件jdbcConfig.properties ##

jdbc.driver=com.mysql.cj.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/zibo?serverTimezone=UTC
    jdbc.username=root
    jdbc.password=zibo15239417242

## 3、修改AccountDao.class ##

package com.zibo.dao;
    
    import com.zibo.domain.Account;
    import org.apache.ibatis.annotations.Insert;
    import org.apache.ibatis.annotations.Select;
    
    import java.util.List;
    
    //账户dao接口
    public interface AccountDao {
        //查询所有账户信息
        @Select("select * from account")
        public List<Account> findAll();
    
        //保存账户信息
        @Insert("insert into account (name,money) values(#{name},#{money})")
        public void saveAccount(Account account);
    
    }

## 4、文件位置图 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 9][]

# 七、Spring整合Mybatis框架 #

## 1、上面配置的SqlMapConfig.xml和jdbcConfig.properties可以删除了 ##

## 2、在applicationContext.xml添加Spring整合Mybatis框架的配置内容 ##

<?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:aop="http://www.springframework.org/schema/aop"
           xmlns:tx="http://www.springframework.org/schema/tx"
           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
    	http://www.springframework.org/schema/aop
    	http://www.springframework.org/schema/aop/spring-aop.xsd
    	http://www.springframework.org/schema/tx
    	http://www.springframework.org/schema/tx/spring-tx.xsd">
        
        <context:component-scan base-package="com.zibo" >
            
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
        </context:component-scan>
    
    
    
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
            <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/zibo?serverTimezone=UTC"/>
            <property name="user" value="root"/>
            <property name="password" value="zibo15239417242"/>
        </bean>
    
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.zibo.dao"/>
        </bean>
    </beans>

# 3、修改AccountServiceImpl类 #

package com.zibo.service.impl;
    
    import com.zibo.dao.AccountDao;
    import com.zibo.domain.Account;
    import com.zibo.service.AccountService;
    import org.springframework.stereotype.Service;
    
    import javax.annotation.Resource;
    import java.util.List;
    
    @Service("accountService")
    public class AccountServiceImpl implements AccountService {
    
        @Resource(name = "accountDao")
        private AccountDao accountDao;
    
        @Override
        public List<Account> findAll() {
            System.out.println("业务层：查询所有账户信息");
            return accountDao.findAll();
        }
    
        @Override
        public void saveAccount(Account account) {
            System.out.println("业务层：保存账户");
            accountDao.saveAccount(account);
        }
    }

## 4、修改list.jsp页面 ##

<%--
      Created by IntelliJ IDEA.
      User: Administrator
      Date: 2018/5/6
      Time: 0:24
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
    
    <h3>查询所有的帐户</h3>
    
    <c:forEach items="${list}" var="account">
        ${account.name}
    </c:forEach>
    
    
    </body>
    </html>

## 5、运行结果（问题已解决，说面见下方） ##

### 正确结果： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 10][]

### 错误结果（此问题是版本兼容问题，通过一段时间研究，未能解决，暂且搁置于此）： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 11][]

# 八、配置事务 #

## 1、在applicationContext.xml中配置Spring框架声明式事务管理 ##

## 2、修改index.jsp页面 ##

<%--
      Created by IntelliJ IDEA.
      User: ZiBo
      Date: 2020/8/19
      Time: 14:13
      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>
        <a href="account/findAll">测试findAll方法</a>
        <br/>
        <form action="account/save" method="post">
            姓名：<input type="text" name="name"/><br/>
            金额：<input type="text" name="money"/><br/>
            <input type="submit" value="保存">
        </form>
    </body>
    </html>

## 3、修改AccountController类 ##

package com.zibo.controller;
    
    import com.zibo.domain.Account;
    import com.zibo.service.AccountService;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import javax.annotation.Resource;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;
    import java.util.List;
    
    //账户web
    @Controller
    @RequestMapping("/account")
    public class AccountController {
    
        @Resource(name = "accountService")
        private AccountService accountService;
    
        @RequestMapping("/findAll")
        public String findAll(Model model){
            System.out.println("表现层：查询所有账户信息！");
            List<Account> list = accountService.findAll();
            model.addAttribute("list",list);
            return "list";
        }
    
        @RequestMapping("/save")
        public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
            System.out.println("表现层：保存账户信息！");
            accountService.saveAccount(account);
            response.sendRedirect(request.getContextPath()+"/account/findAll");
        }
    }

## 4、运行结果（问题已解决，说面见下方） ##

### 正确结果： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 12][]

### 错误结果（未能成功将数据添加到数据库）： ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 13][]

# 九、问题被解决 #

### 时间：2020年8月24日17:20:21 ###

###  ###

## 1、描述： ##

经过几天之后报的是这个错误：

无法在web.xml或使用此应用程序部署的jar文件中解析绝对uri：[http://java.sun.com/jsp/jstl/core]

###  ###

## 2、修改了一些代码（与问题无关）： ##

修改了AccountServiceImpl类（已在上面更新）；

修改了list.jsp（已在上面更新）；

修改了index.jsp（已在上面更新）；

## 3、关键点（解决问题的方法） ##

WEB/INF的lib下，除了导入jstl.jar包，还要导入standard.jar包。另外，解压standard.jar包，把.tld文件放在WEB/INF下；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 14][]

## 4、运行结果 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 15][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/2020081814275985.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/2020081814461666.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/2020081816392223.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20200819142456225.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 5]: https://img-blog.csdnimg.cn/20200819142553784.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 6]: https://img-blog.csdnimg.cn/20200819142707713.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 7]: https://img-blog.csdnimg.cn/20200819143914452.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 8]: https://img-blog.csdnimg.cn/20200819145202170.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz_size_16_color_FFFFFF_t_70 11]: https://img-blog.csdnimg.cn/20200820103319445.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI5Njg5MzQz,size_16,color_FFFFFF,t_70
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