Spring MVC整合ssm

最新推荐文章于 2024-09-16 14:26:40 发布

原创最新推荐文章于 2024-09-16 14:26:40 发布 · 426 阅读

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CC 4.0 BY-SA版权

文章标签：

#spring #mvc #java

一、ssm整合

1.1、建库建表

CREATE TABLE `account` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) DEFAULT NULL,
  `money` double DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

1.2、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>
    <parent>
        <groupId>com.by</groupId>
        <artifactId>SpringMVC</artifactId>
        <version>1.0-SNAPSHOT</version>

    </parent>

    <artifactId>ssm</artifactId>
    <packaging>war</packaging>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>5.2.8.RELEASE</spring.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <mybatis.version>3.4.5</mybatis.version>
        <druid.version>1.1.0</druid.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${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>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.25</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.0</version>
        </dependency>
        <!--jsp-->
        <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>2.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- log start -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.30</version>
        </dependency>

        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.3</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <!-- 配置Tomcat插件 -->
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <!--端口号-->
                    <port>8080</port>
                    <!--项目名-->
                    <path>/</path>
                    <!--按UTF-8进行编码-->
                    <uriEncoding>UTF-8</uriEncoding>
                </configuration>
            </plugin>
        </plugins>
        <!-- 如果不添加此节点src/main/java目录下的所有配置文件都会被漏掉。 -->
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>
    </build>
</project>

1.3、db.properties

添加数据库配置文件

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?useSSL=false&serverTimezone=Asia/Shanghai
jdbc.username=root
jdbc.password=123456

1.4、applicationContext-dao.xml

配置数据源和MyBatis

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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/context
       http://www.springframework.org/schema/context/spring-context.xsd
      ">
<!--加载配置文件-->
    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!--配置sqlSessionFactory,让spring管理 整合spring和mybatis-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" >
        <property name="dataSource" ref="dataSource"></property>
     </bean>

<!--配置MyBatis下扫描的包-->
 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
     <property name="basePackage"  value="com.by.mapper"></property>
     <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
 </bean>

</beans>

1.5、 applicationContext-service.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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/context
       http://www.springframework.org/schema/context/spring-context.xsd
    ">
<!--扫描service下的类 使其注入spring IOC容器中-->
    <context:component-scan base-package="com.by.service"></context:component-scan>
</beans>

1.6、applicationContext-tx.xml

配置事务

<?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: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/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
">
    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
     </bean>

    <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>
</beans>

1.7、springmvc.xml

配置springmvc 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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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">

    <!--spring容器要扫描的包-->
    <context:component-scan base-package="com.by.controller"></context:component-scan>
    <!--注册HandlerMapping和HandlerAdaptor-->
    <mvc:annotation-driven conversion-service="sc"></mvc:annotation-driven>

    <!--配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/" ></property>
        <property name="suffix" value=".jsp" ></property>
     </bean>

    <!--配置上传解析器-->
    <bean id="multipartResolver"  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--配置最大byte-->
        <property name="maxUploadSize" value="5242880"></property>
        <!--编码格式-->
        <property name="defaultEncoding" value="UTF-8"></property>
    </bean>

    <bean id="sc" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <bean class="com.by.converter.DateConverter"></bean>
            </set>
        </property>
    </bean>

    <!--配置interceptor-->
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <!--不拦截的路径-->
            <mvc:exclude-mapping path="/user/**"/>
            <bean class="com.by.interceptor.LoginInterceptor"></bean>
        </mvc:interceptor>
    </mvc:interceptors>

<!--配置静态资源访问路径和位置-->
    <mvc:resources mapping="/head/**" location="/head/"></mvc:resources>
</beans>

1.8、web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <welcome-file-list>
        <welcome-file>login.jsp</welcome-file>
    </welcome-file-list>
    <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>
    <!--配置监听器 加载application-*.xml-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext-*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    
    <!--配置dispatcherServlet-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

1.9、pojo

创建实体类

package com.by.pojo;
import java.util.Date;

public class Account {
    private Integer id;
    private String name;
    private Double money;
    private String head;
    private Date date;
    
    public Account() {
    }
    public Account(String name, Double money) {
        this.name = name;
        this.money = money;
    }
    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    public String getHead() {
        return head;
    }

    public void setHead(String head) {
        this.head = head;
    }

    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;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                ", head='" + head + '\'' +
                '}';
    }
}

1.10、mapper

package com.by.mapper;

import com.by.pojo.Account;
import com.by.pojo.AccountParam;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;

import java.util.List;
@Repository
public interface AccountMapper {
    List<Account> selectAccount();
    void saveAccount(Account account);

    Account getAccountById(Integer id);

    void updateAccount(Account account);

    void deleteAccount(Integer id);
    
    List<Account> selectParam(AccountParam accountParam);

}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.by.mapper.AccountMapper">
    <select id="selectAccount" resultType="com.by.pojo.Account">
        select * from account
    </select>

    <insert id="saveAccount" >
     insert into account(name,money,head,date) values (#{name},#{money},#{head},#{date})
    </insert>

<select id="getAccountById" resultType="com.by.pojo.Account">
    select * from account where id=#{id}
</select>

    <update id="updateAccount">
        update account
        <set>
            <if test="name!=null and name!=''">
                name=#{name},
            </if>
            <if test="money!=null and money!=''">
                money=#{money},
            </if>
            <if test="head!=null and head!=''">
                head=#{head},
            </if>
        <if test="date!=null ">
            date=#{date}
        </if>
        </set>
        where id=#{id}
    </update>

    <delete id="deleteAccount">
        delete from account where id=#{id}
    </delete>
    
</mapper>

1.11、service

package com.by.service;

import com.alibaba.druid.util.StringUtils;
import com.by.mapper.AccountMapper;
import com.by.pojo.Account;
import com.by.pojo.AccountParam;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
@Service
@Transactional
public class AccountServiceImpl implements AccountService{

    @Autowired
    private AccountMapper accountMapper;
    @Override
    public List<Account> selectAccount() {
        return accountMapper.selectAccount();
    }

    @Override
    public void saveAccount(Account account) {
        accountMapper.saveAccount(account);
    }

    @Override
    public Account getAccountById(Integer id) {
        return accountMapper.getAccountById(id);
    }

    @Override
    public void updateAccount(Account account) {
        accountMapper.updateAccount(account);
    }

    @Override
    public void deleteAccount(Integer id) {
        accountMapper.deleteAccount(id);
    }

    @Override
    public List<Account> selectParam(AccountParam accountParam) {
        return accountMapper.selectParam(accountParam);
    }
}

1.12、controller

package com.by.controller;


import com.by.mapper.AccountMapper;
import com.by.pojo.Account;
import com.by.pojo.AccountParam;
import com.by.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.net.BindException;
import java.util.List;

@Controller
@RequestMapping("/account")
public class AccountController {
@Autowired
private AccountService accountService;
    @RequestMapping("/selectAccount")
    public String selectAccount(Model model){
        List<Account> accountList = accountService.selectAccount();
        model.addAttribute("accountList",accountList);
        return "account_select";
    }

1.13、jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
    <title>Title</title>
  <h1>查询账户</h1>
</head>
<body>
<a href="/account/toSaveAccount">新增账户</a>

<form action="/account/selectParam" method="post">
  用户名：<input type="text" name="name1">
  资金：<input type="text" name="min">-<input type="text" name="max">
  日期：<input type="text" name="beginDate">-<input type="text" name="endDate">
  <input type="submit" value="   查   询   ">
</form>

<table width="31%" border="1" cellspacing="0" cellpadding="0">
  <tr>
    <th>id</th>
    <th>name</th>
    <th>money</th>
    <th>头像</th>
     <th>日期</th>
    <th>操作</th>
  </tr>
  <c:forEach var="account" items="${accountList}">
    <tr>
      <td>${account.id}</td>
      <td>${account.name}</td>
      <td>${account.money}</td>
      <td><img src="/head/${account.head}" width="120px" height="90px" ></td>
      <td ><fmt:formatDate value="${account.date}" pattern="yyyy-MM-dd"></fmt:formatDate></td>
      <td style="width: 110px; height: 90px"><a href="/account/getAccount/${account.id}" >修改</a>
     <a href="/account/deleteAccount/${account.id}">删除</a> </td>
    </tr>
  </c:forEach>
</table><br>
欢迎用户<span style="color: hotpink">${sessionScope.user.username}</span>登录，点击<a href="/user/logOut">退出</a>

</body>
</html>

二、拦截器

2.1、什么是拦截器

Spring MVC中的拦截器（Interceptor）类似于Servlet中的过滤器（Filter），它主要用于拦截用户请求并作相应的处理。例如通过拦截器可以进行权限验证、判断用户是否登录等。

拦截器依赖于web框架，在实现上基于Java的反射机制，属于面向切面编程（AOP）的一种运用。

2.2、自定义拦截器

创建拦截器

创建登录拦截器

package com.by.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // * 在控制器方法调用前执行
        // * 返回值为是否中断
        //* true：表示继续执行（下一个拦截器或处理器）
     *  // false：则会中断后续的所有操作，所以我们需要使用response来继续响应后续请求
        //从session获取对象
        Object user = request.getSession().getAttribute("user");
         if (user != null){
           //不为空放行
             return true;
         }
         //为空重定向到login.jsp
         response.sendRedirect("/login.jsp");
         //不放行
           return false;
    }
}

2.3、配置拦截器

  <!--配置interceptor-->
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <!--不拦截的路径-->
            <mvc:exclude-mapping path="/user/**"/>
            <bean class="com.by.interceptor.LoginInterceptor"></bean>
        </mvc:interceptor>
    </mvc:interceptors>

<!--配置静态资源访问路径和位置-->
    <mvc:resources mapping="/head/**" location="/head/"></mvc:resources>

三、文件上传

3.1、添加依赖

<!--文件上传-->
<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.3.1</version>
</dependency>

3.2、配置文件上传解析器

    <!--配置上传解析器-->
    <bean id="multipartResolver"  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!--配置最大byte-->
        <property name="maxUploadSize" value="5242880"></property>
        <!--编码格式-->
        <property name="defaultEncoding" value="UTF-8"></property>
    </bean>

3.3、测试

@Controller
@RequestMapping("/account")
public class AccountController {

    @RequestMapping(path="/upload")
    public String upload(HttpServletRequest request, 
                             MultipartFile upload,Model model) throws IOException {
        System.out.println("springmvc方式的文件上传");
        //获取要上传的文件目录
        String path = 
            request.getSession().getServletContext().getRealPath("/uploads");
        System.out.println("path:"+path);
        //根据文件上传的目录创建File对象，如果不存在则创建1个File对象
        File file = new File(path);
        if(!file.exists()){
            //创建一个file对象
            file.mkdirs();
        }
        //获取文件上传名称
        String filename = upload.getOriginalFilename();
        //完成文件上传
        upload.transferTo(new File(path,filename));

        model.addAttribute("msg", "欢迎你 springmvc");
        return "success";
    }
}

四、全局异常处理器

如果不加以异常处理，错误信息肯定会抛在浏览器页面上，这样很不友好，所以必须进行异常处理。

4.1、异常处理思路

系统的dao、service、controller出现都通过throws Exception向上抛出，最后由springmvc前端控制器交由异常处理器进行异常处理，如下图：

4.2、创建异常处理器

package com.by.exception;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
//实现HandlerExceptionResolver接口
public class GlobalExceptionResolver implements HandlerExceptionResolver {

    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception e) {
       //记录日志
        e.printStackTrace();
        //展示错误页面
        ModelAndView mv = new ModelAndView();
        mv.setViewName("exception");
        mv.addObject("msg", e.getMessage());
        return mv;
    }
}

4.3、测试

@Controller
@RequestMapping("/account")
public class AccountController {

   @RequestMapping("/findAccount14")
    public String findAccount14(Model model) {
        model.addAttribute("msg", "欢迎你 springmvc");
        //模拟异常信息
        int i = 10/0;
        return "success";
    }
}