SpringMvc 之crud增删改查应用

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目录

1.创建项目

2.配置文件

2.1pom.xml文件

2.2 web.xml文件 

2.3 spring-context.xml

2.4 spring-mvc.xml

2.5 spring-MyBatis.xml 

2.6 jdbc.properties 数据库

2.7 generatorConfig.xml 

 2.8 日志文件log4j2

3.后台代码

 3.1 pageBean.java 

3.2切面类

3.3 biz层

3.4 web层

4.前台代码

4.1 index.jsp 

4.2 edit.jsp

5效果展示

---

1.创建项目

首先创建一个Maven项目，图书后台管理系统，如何创建，创建Maven项目https://blog.csdn.net/2301_76988707/article/details/132676056?spm=1001.2014.3001.5502

2.配置文件

接着配置文件

2.1pom.xml文件

        可以看到注释知道pom.xml文件中导入了哪些文件

  4.0.0

  org.example
  syzyssm
  1.0-SNAPSHOT
  war

  syzyssm Maven Webapp
  
  http://www.example.com

  
    UTF-8
    1.8
    1.8
    3.7.0

    
    
    5.0.2.RELEASE
    
    3.4.5
    
    5.1.44
    
    5.1.2
    
    1.3.1
    
    2.1.1
    2.4.3
    
    2.9.1
    3.2.0
    1.7.13
    
    4.12
    4.0.0
    1.18.2

    1.1.0
    2.10.0

    2.9.0
    1.7.1.RELEASE
    2.9.3
    1.2
    1.1.2
    8.0.47
    1.3.3
    5.0.2.Final

    1.3.2
  

  
    
    
      org.springframework
      spring-core
      ${spring.version}
    
    
      org.springframework
      spring-beans
      ${spring.version}
    
    
      org.springframework
      spring-context
      ${spring.version}
    
    
      org.springframework
      spring-orm
      ${spring.version}
    
    
      org.springframework
      spring-tx
      ${spring.version}
    
    
      org.springframework
      spring-aspects
      ${spring.version}
    
    
      org.springframework
      spring-web
      ${spring.version}
    

    
      org.springframework
      spring-test
      ${spring.version}
    


    
    
      org.mybatis
      mybatis
      ${mybatis.version}
    
    
    
      mysql
      mysql-connector-java
      ${mysql.version}
    
    
    
      com.github.pagehelper
      pagehelper
      ${pagehelper.version}
    
    
    
      org.mybatis
      mybatis-spring
      ${mybatis.spring.version}
    

    
      org.springframework
      spring-context-support
      ${spring.version}
    

    
    
      org.mybatis.caches
      mybatis-ehcache
      ${mybatis.ehcache.version}
    
    
    
      net.sf.ehcache
      ehcache
      ${ehcache.version}
    

    
      redis.clients
      jedis
      ${redis.version}
    
    
      org.springframework.data
      spring-data-redis
      ${redis.spring.version}
    
    
      com.fasterxml.jackson.core
      jackson-databind
      ${jackson.version}
    
    
      com.fasterxml.jackson.core
      jackson-core
      ${jackson.version}
    
    
      com.fasterxml.jackson.core
      jackson-annotations
      ${jackson.version}
    

    
    
      org.apache.commons
      commons-dbcp2
      ${commons.dbcp2.version}
      
        
          commons-pool2
          org.apache.commons
        
      
    
    
      org.apache.commons
      commons-pool2
      ${commons.pool2.version}
    

    
    
      org.springframework
      spring-webmvc
      ${spring.version}
    

    

    
    
    
    
      org.slf4j
      slf4j-api
      ${slf4j.version}
    
    
      org.slf4j
      jcl-over-slf4j
      ${slf4j.version}
      runtime
    

    
    
      org.apache.logging.log4j
      log4j-api
      ${log4j2.version}
    
    
      org.apache.logging.log4j
      log4j-core
      ${log4j2.version}
    
    
    
      org.apache.logging.log4j
      log4j-slf4j-impl
      ${log4j2.version}
    
    
    
      org.apache.logging.log4j
      log4j-web
      ${log4j2.version}
      runtime
    

    
    
      com.lmax
      disruptor
      ${log4j2.disruptor.version}
    

    
    
      junit
      junit
      ${junit.version}
      test
    
    
      javax.servlet
      javax.servlet-api
      ${servlet.version}
      provided
    
    
      org.projectlombok
      lombok
      ${lombok.version}
      provided
    
    
      jstl
      jstl
      ${jstl.version}
    
    
      taglibs
      standard
      ${standard.version}
    
    
      org.apache.tomcat
      tomcat-jsp-api
      ${tomcat-jsp-api.version}
    
    
      commons-fileupload
      commons-fileupload
      ${commons-fileupload.version}
    

    
      org.hibernate
      hibernate-validator
      ${hibernate-validator.version}
    

    
    
      org.apache.shiro
      shiro-core
      ${shiro.version}
    
    
      org.apache.shiro
      shiro-web
      ${shiro.version}
    
    
      org.apache.shiro
      shiro-spring
      ${shiro.version}
    
  

  
    syzyssm

    
      
      
        src/main/java
        
          **/*.xml
        
      
      
      
        src/main/resources
        
          *.properties
          *.xml
        
      
    

      

        
          org.apache.maven.plugins
          maven-compiler-plugin
          ${maven.compiler.plugin.version}
          
            ${maven.compiler.source}
            ${maven.compiler.target}
            ${project.build.sourceEncoding}
          
        
        
          org.mybatis.generator
          mybatis-generator-maven-plugin
          1.3.2
          
            
            
              mysql
              mysql-connector-java
              ${mysql.version}
            
          
          
            true
          
        


        
          maven-clean-plugin
          3.1.0
        
        
        
          maven-resources-plugin
          3.0.2
        
        
          maven-compiler-plugin
          3.8.0
        
        
          maven-surefire-plugin
          2.22.1
        
        
          maven-war-plugin
          3.2.2
        
        
          maven-install-plugin
          2.5.2
        
        
          maven-deploy-plugin
          2.8.2
        
      
  

2.2 web.xml文件 

        在这里需要建立两个资源包，一个是spring-context.xml，一个是spring-mvc.xml

  Archetype Created Web Application
  
  
  
    contextConfigLocation
    classpath:spring-context.xml
  
  
  
    org.springframework.web.context.ContextLoaderListener
  
  

  
  
    encodingFilter
    org.springframework.web.filter.CharacterEncodingFilter
    true
    
      encoding
      UTF-8
    
  
  
    encodingFilter
    /*
  

  
  
    SpringMVC
    org.springframework.web.servlet.DispatcherServlet
    
    
      contextConfigLocation
      classpath:spring-mvc.xml
    
    1
    
    true
  
  
    SpringMVC
    /
  

2.3 spring-context.xml

2.4 spring-mvc.xml

2.5 spring-MyBatis.xml   spring与MyBatis的整合

    
    
    
    
    

    

    
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
    

    
    
    
        
        
        
        
        
        
        
        
            
                
                    
                        
                            helperDialect=mysql
                        
                    
                
            
        
    

    
    
    
        
        
        
        
    

    
        
    
    
    

2.6 jdbc.properties 数据库 配置文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456

2.7 generatorConfig.xml   创建实体类和业务方法

 2.8 日志文件log4j2

    
        
        /root/workspace/lucenedemo/logs
        /root/workspace/lucenedemo/logs/error
        /root/workspace/lucenedemo/logs/warn
        %d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%n
    

    
        
        
            
            
            
            
            
        

        
        
        
            
        
        
        
            
            
            
            
                
                
                
                
                
                
            
        

        
            
            
            
                
                
            
            
            
        

        
            
            
            
                
                
                
            
        

    

    
    
        
        
        

        
        
        
        
        
        


        
        
            
            
            
            
        

    

3.后台代码

     首先写好工具类

         3.1 pageBean.java 

package com.sy.utis;

import javax.servlet.http.HttpServletRequest;
import java.io.Serializable;
import java.util.Map;

public class PageBean implements Serializable {

	private static final long serialVersionUID = 2422581023658455731L;

	//页码
	private int page=1;
	//每页显示记录数
	private int rows=10;
	//总记录数
	private int total=0;
	//是否分页
	private boolean isPagination=true;
	//上一次的请求路径
	private String url;
	//获取所有的请求参数
	private Map map;
	
	public PageBean() {
		super();
	}
	
	//设置请求参数
	public void setRequest(HttpServletRequest req) {
		String page=req.getParameter("page");
		String rows=req.getParameter("rows");
		String pagination=req.getParameter("pagination");
		this.setPage(page);
		this.setRows(rows);
		this.setPagination(pagination);
		this.url=req.getContextPath()+req.getServletPath();
		this.map=req.getParameterMap();
	}
	public String getUrl() {
		return url;
	}

	public void setUrl(String url) {
		this.url = url;
	}

	public Map getMap() {
		return map;
	}

	public void setMap(Map map) {
		this.map = map;
	}

	public int getPage() {
		return page;
	}

	public void setPage(int page) {
		this.page = page;
	}
	
	public void setPage(String page) {
		if(null!=page&&!"".equals(page.trim()))
			this.page = Integer.parseInt(page);
	}

	public int getRows() {
		return rows;
	}

	public void setRows(int rows) {
		this.rows = rows;
	}
	
	public void setRows(String rows) {
		if(null!=rows&&!"".equals(rows.trim()))
			this.rows = Integer.parseInt(rows);
	}

	public int getTotal() {
		return total;
	}

	public void setTotal(int total) {
		this.total = total;
	}
	
	public void setTotal(String total) {
		this.total = Integer.parseInt(total);
	}

	public boolean isPagination() {
		return isPagination;
	}
	
	public void setPagination(boolean isPagination) {
		this.isPagination = isPagination;
	}
	
	public void setPagination(String isPagination) {
		if(null!=isPagination&&!"".equals(isPagination.trim()))
			this.isPagination = Boolean.parseBoolean(isPagination);
	}
	
	/**
	 * 获取分页起始标记位置
	 * @return
	 */
	public int getStartIndex() {
		//(当前页码-1)*显示记录数
		return (this.getPage()-1)*this.rows;
	}
	
	/**
	 * 末页
	 * @return
	 */
	public int getMaxPage() {
		int totalpage=this.total/this.rows;
		if(this.total%this.rows!=0)
			totalpage++;
		return totalpage;
	}
	
	/**
	 * 下一页
	 * @return
	 */
	public int getNextPage() {
		int nextPage=this.page+1;
		if(this.page>=this.getMaxPage())
			nextPage=this.getMaxPage();
		return nextPage;
	}
	
	/**
	 * 上一页
	 * @return
	 */
	public int getPreivousPage() {
		int previousPage=this.page-1;
		if(previousPage<1)
			previousPage=1;
		return previousPage;
	}

	@Override
	public String toString() {
		return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", isPagination=" + isPagination
				+ "]";
	}
}

3.2切面类

这里运用了环绕通知，日志管理，进行筛选及判断分页是否为空

package com.sy.aspect;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.sy.utis.PageBean;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author 谌艳
 * @site www.shenyan.com
 * @create 2023-08-25 17:21
 * @Aspect//代表当前类为切面类
 * @Component//代表当前类交给spring进行管理
 *
 */
@Aspect//代表当前类为切面类
@Component//代表当前类交给spring进行管理
public class PagerAspect {

 @Around("execution(* *..*Biz.*Pager(..))")
    public Object invoke(ProceedingJoinPoint args) throws Throwable {
        Object[] params = args.getArgs();
        PageBean pageBean = null;
        for (Object param : params) {
            if(param instanceof PageBean){
                pageBean = (PageBean)param;
                break;
            }
        }

        if(pageBean != null && pageBean.isPagination())
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());

        Object list = args.proceed(params);

        if(null != pageBean && pageBean.isPagination()){
            PageInfo pageInfo = new PageInfo((List) list);
            pageBean.setTotal(pageInfo.getTotal()+"");
        }
        return list;
    }

}

3.3 biz层

增删改查，模糊查询

首先模糊查询

 
    select
    *
    from t_mvc_book
    
      
        and bname like concat('%',#{bname},'%')
      
    
  

再定义一个接口

package com.sy.biz;

import com.sy.model.Book;
import com.sy.utis.PageBean;

import java.util.List;

public interface BookBiz {

    int deleteByPrimaryKey(Integer bid);

    int insert(Book record);

    int insertSelective(Book record);

    Book selectByPrimaryKey(Integer bid);

    int updateByPrimaryKeySelective(Book record);

    int updateByPrimaryKey(Book record);

    List selectByBookPager(Book book, PageBean pageBean);

}

接着写这个类实现接口

package com.sy.biz.impl;

import com.sy.biz.BookBiz;
import com.sy.mapper.BookMapper;
import com.sy.model.Book;
import com.sy.utis.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @author 谌艳
 * @site www.shenyan.com
 * @create 2023-09-08 16:10
 */
@Service
public class BookBizImpl implements BookBiz {

    @Autowired
    private BookMapper bookMapper;


    @Override
    public int deleteByPrimaryKey(Integer bid) {
        return bookMapper.deleteByPrimaryKey(bid);
    }

    @Override
    public int insert(Book record) {
        return bookMapper.insert(record);
    }

    @Override
    public int insertSelective(Book record) {
        return bookMapper.insertSelective(record);
    }

    @Override
    public Book selectByPrimaryKey(Integer bid) {
        return bookMapper.selectByPrimaryKey(bid);
    }

    @Override
    public int updateByPrimaryKeySelective(Book record) {
        return bookMapper.updateByPrimaryKeySelective(record);
    }

    @Override
    public int updateByPrimaryKey(Book record) {
        return bookMapper.updateByPrimaryKey(record);
    }

    @Override
    public List selectByBookPager(Book book, PageBean pageBean) {
        return bookMapper.selectByBookPager(book);
    }
}

3.4 web层

调用增删改查的方法，跳转页面

package com.sy.web;

import com.sy.biz.BookBiz;
import com.sy.model.Book;
import com.sy.utis.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

/**
 * @author 谌艳
 * @site www.shenyan.com
 * @create 2023-09-08 16:19
 */
@Controller
@RequestMapping("/book")
public class BookController {

    @Autowired
    private BookBiz bookBiz;

//  模糊查询，查看所有
    @RequestMapping("/list")
    public String listPager(Book book, HttpServletRequest request){
        PageBean pageBean = new PageBean();
        pageBean.setRequest(request);
        List books = bookBiz.selectByBookPager(book, pageBean);
        request.setAttribute("list",books);
        request.setAttribute("pageBean",pageBean);
        return "book/index";
    }

    //    删
    @RequestMapping("/del")
    public String del(Book book, HttpServletRequest request){
        bookBiz.deleteByPrimaryKey(book.getBid());
        return "redirect:list";
    }

//改
    @RequestMapping("/edit")
    public String edit(Book book, HttpServletRequest request){
        bookBiz.updateByPrimaryKeySelective(book);
        return "redirect:list";
    }
加
    @RequestMapping("/add")
    public String add(Book book, HttpServletRequest request){
        bookBiz.insertSelective(book);
        return "redirect:list";
    }

    //    查询单个
    @RequestMapping("/preSave")
    public String preSave(Book book, HttpServletRequest request){
        if (book != null && book.getBid() != null && book.getBid() != 0){
            Book b = bookBiz.selectByPrimaryKey(book.getBid());
            request.setAttribute("b",b);
        }
        return "book/edit";
    }


}

4.前台代码

4.1 index.jsp 

主界面

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>



    
    
    
    
    



    

        
        
        
        
    
    查询
    新增



        

    

    

        
书籍编号
        
书籍名称
        
书籍价格
        
操作
    
    
    

    

            
${b.bid }
            
${b.bname }
            
${b.price }
            

                修改
                删除
            
        
    
    

4.2 edit.jsp

新增和修改都是用这个界面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


                                                   <%--/book/add--%><%--/book/edit--%>

    bid:

    bname:

    price:

    

5效果展示