SpringMVC实现增删改查(CRUD)--从头到尾全面详细讲解

一，实现CRUD前准备工作

1.1 pom.xml依赖的配置

创建Model项目并导入相关pom.xml依赖

        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}
        
    

    
        ssm
        
            
            
                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
                
            
        
    

1.2 generatorConfig.xml

此文件是实现模型代码层的配置，在下面table标签中定义数据库的表与生成的表名

1.3 jdbc.properties

建立数据库连接

1.4 log4j2.xml:

日志文件

	
		
		/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
	

	
		
		
			
			
			
			
			
		

		
		
		
			
		
		
		
			
			
			
			
				
				
				
				
				
				
			
		

		
			
			
			
				
				
			
			
			
		

		
			
			
			
				
				
				
			
		

	

	
	
		
		
		

		
		
		
		
		
		


		
		
			
			
			
			
		

	

1.5 spring-context.xml

1.6 spring-mvc.xml

1.7 spring-mybatis.xml

    
    
    
    
    

    

    
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
    

    
    
    
        
        
        
        
        
        
        
        
            
                
                    
                        
                            helperDialect=mysql
                        
                    
                
            
        
    

    
    
    
        
        
        
        
    

    
        
    
    
    

1.8 生成模型层代码

生成类样式：

1.9 导入相关的工具类

创建util包并添加Page Bean类

PageBean类：

专门处理分页

package com.Bingzy.util;

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
				+ "]";
	}
}

创建一个aspect包并添加pageAspect类：

该是切面类专门来做分页

package com.Bingzy.aspect;

import com.Bingzy.util.PageBean;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
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;

/**
 * @Name BingBing
 * @company zking cy
 * @create 2023-08-25-18:37
 */
@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 PageAspect {
    @Around("execution(* *..*Biz.*Page(..))")
    public Object invoke(ProceedingJoinPoint args) throws Throwable {
        PageBean pageBean =null;
           //获取目标方法中的所有参数
        Object[] arg = args.getArgs();
        for (Object param : arg){
          if(param instanceof  PageBean){
          pageBean= (PageBean) param;
          break;
      }
        }
        if (pageBean != null && pageBean.isPagination())
            PageHelper.startPage(pageBean.getPage(), pageBean.getRows());
        //执行目标方法
         Object lst=  args.proceed();
            if (pageBean != null && pageBean.isPagination()) {
                PageInfo  info = new PageInfo ((List) lst);
                pageBean.setTotal((int) info.getTotal());

        }
            return lst;
    }
}

二、controller层代码编写

创建一个web包并定义controller类

package com.Bingzy.web;

import com.Bingzy.Biz.TbookBiz;
import com.Bingzy.model.Tbook;
import com.Bingzy.util.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;

/**
 * @Name BingBing
 * @company zking cy
 * @create 2023-09-08-19:51
 */
@Controller
@RequestMapping("/book")
public class TbookController {
    @Autowired
    private TbookBiz tbookBiz;

    @RequestMapping("/list")
    //查询
    public String list(Tbook tbook, HttpServletRequest request){
        PageBean pageBean =new PageBean();
        pageBean.setRequest(request);
        List tbookList = tbookBiz.listPager(tbook, pageBean);
        request.setAttribute("lst",tbookList);
        request.setAttribute("pageBean",pageBean);
        return  "book/list";
    }

    //增加
    //    增
    @RequestMapping("/add")
    public String add(Tbook tbook){
        tbookBiz.insertSelective(tbook);
        return "redirect:list";
    }

    //    删
    @RequestMapping("/del")
    public String del(Tbook tbook){
        tbookBiz.deleteByPrimaryKey(tbook.getBid());
        return "redirect:list";
    }

    //    改
    @RequestMapping("/edit")
    public String edit(Tbook tbook){
        tbookBiz.updateByPrimaryKeySelective(tbook);
        return "redirect:list";
    }
    //    模糊分页查询
    @RequestMapping("/PreSave")
    public String PreSave(Tbook tbook, HttpServletRequest request){
        if(tbook!=null && tbook.getBid()!=null){
            Tbook s = tbookBiz.selectByPrimaryKey(tbook.getBid());
            request.setAttribute("b",s);
        }
        return "book/edit";
    }


}

三，分页代码与前端代码

3.1 分页代码

3.1.1 PageTag

package com.Bingzy.tag;

import com.Bingzy.util.PageBean;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;



public class PageTag extends BodyTagSupport{
	private PageBean pageBean;// 包含了所有分页相关的元素
	
	public PageBean getPageBean() {
		return pageBean;
	}

	public void setPageBean(PageBean pageBean) {
		this.pageBean = pageBean;
	}

	@Override
	public int doStartTag() throws JspException {
//		没有标签体，要输出内容
		JspWriter out = pageContext.getOut();
		try {
			out.print(toHTML());
		} catch (IOException e) {
			e.printStackTrace();
		}
		return super.doStartTag();
	}

	private String toHTML() {
		StringBuffer sb = new StringBuffer();
//		隐藏的form表单---这个就是上一次请求下次重新发的奥义所在
//		上一次请求的URL
		sb.append("
");
		sb.append("	");
//		上一次请求的参数
		Map paramMap = pageBean.getMap();
		if(paramMap != null && paramMap.size() > 0) {
			Set> entrySet = paramMap.entrySet();
			for (Entry entry : entrySet) {
//				参数名
				String key = entry.getKey();
//				参数值
				for (String value : entry.getValue()) {
//					上一次请求的参数，再一次组装成了新的Form表单
//					注意：page参数每次都会提交，我们需要避免
					if(!"page".equals(key)) {
						sb.append("	");
					}
				}
			}
		}
		sb.append("");
		
//		分页条
		sb.append("
");
		sb.append("	
首页
");
		sb.append("	
<
");// less than 小于号
//		sb.append("	
1
");
//		sb.append("	
2
");
		sb.append("	
"+pageBean.getPage()+"
");
		sb.append("	
>
");
		sb.append("	
尾页
");
		sb.append("	
到第页
");
		sb.append("	
确定
");
		sb.append("	
共"+pageBean.getTotal()+"条
");
		sb.append("
");
		
//		分页执行的JS代码
		sb.append("");
		
		return sb.toString();
	}
}

3.1.2 zking.tld

    
  zking 1.1 core library
  zking core
  1.1
  zking
  http://jsp.veryedu.cn
  
  
  
    page
    com.Bingzy.tag.PageTag
    JSP
    
        pageBean
        true
        true
    
  
  

3.2 前端代码

list.jsp

<%@ 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ID
		
书籍名称
		
操作
	
	
	

	

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

				修改
				删除
			
		
	
	



${pageBean }
${slist}

edit.jsp

增加与修改都是同一个界面

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








    编辑界面
    

        书籍id:

        书籍名称:

        
    

四，案例测试（CRUD）