学习SpringMvc第三战-利用SpringMvc实现CRUD

目录

一.前期环境搭建

1.替换pom.xml的内容

2.导入配置文件(小编上传资源)

 3.修改xml文件

4.点击创建自动生成代码

5.写一个类用于处理页面跳转

二.正式启动SpringMVC的CRUD

1.建立接口，调用自动生成的接口

2.构建分页代码

2.1书写BookMapper.xml中分页的方法

2.2调用分页的方法

2.3导入一个工具类用于分页实现

2.4导入一个tid文件用于分页实现

3.实现后端功能

3.1构建功能实现代码

3.2在BookMapper.xml文件编写查询的方法(并且实现)

3.3构建list界面（展示数据）

3.4构建edit界面

3.5效果展示

1.增加

2.删除

3.修改

4.查询 

---

前言：

小编讲述了参数传递，返回值以及页面跳转！为我们的CRUD提供了理论基础，接下来小编会通过SpringMvc实现CRUD来讲述在企业开发中必须要学会的CRUD

一.前期环境搭建

1.替换pom.xml的内容

<properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <maven.compiler.source>1.8maven.compiler.source>
        <maven.compiler.target>1.8maven.compiler.target>
        <maven.compiler.plugin.version>3.7.0maven.compiler.plugin.version>
 
        
        
        <spring.version>5.0.2.RELEASEspring.version>
        
        <mybatis.version>3.4.5mybatis.version>
        
        <mysql.version>5.1.44mysql.version>
        
        <pagehelper.version>5.1.2pagehelper.version>
        
        <mybatis.spring.version>1.3.1mybatis.spring.version>
        
        <commons.dbcp2.version>2.1.1commons.dbcp2.version>
        <commons.pool2.version>2.4.3commons.pool2.version>
        
        <log4j2.version>2.9.1log4j2.version>
        <log4j2.disruptor.version>3.2.0log4j2.disruptor.version>
        <slf4j.version>1.7.13slf4j.version>
        
        <junit.version>4.12junit.version>
        <servlet.version>4.0.0servlet.version>
        <lombok.version>1.18.2lombok.version>
 
        <mybatis.ehcache.version>1.1.0mybatis.ehcache.version>
        <ehcache.version>2.10.0ehcache.version>
 
        <redis.version>2.9.0redis.version>
        <redis.spring.version>1.7.1.RELEASEredis.spring.version>
        <jackson.version>2.9.3jackson.version>
        <jstl.version>1.2jstl.version>
        <standard.version>1.1.2standard.version>
        <tomcat-jsp-api.version>8.0.47tomcat-jsp-api.version>
        <commons-fileupload.version>1.3.3commons-fileupload.version>
        <hibernate-validator.version>5.0.2.Finalhibernate-validator.version>
 
        <shiro.version>1.3.2shiro.version>
    properties>

 

   <dependencies>
        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-coreartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-beansartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-contextartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-ormartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-txartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-aspectsartifactId>
            <version>${spring.version}version>
        dependency>
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webartifactId>
            <version>${spring.version}version>
        dependency>
 
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-testartifactId>
            <version>${spring.version}version>
        dependency>
 
 
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>${mybatis.version}version>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>${mysql.version}version>
        dependency>
        
        <dependency>
            <groupId>com.github.pagehelpergroupId>
            <artifactId>pagehelperartifactId>
            <version>${pagehelper.version}version>
        dependency>
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatis-springartifactId>
            <version>${mybatis.spring.version}version>
        dependency>
 
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-context-supportartifactId>
            <version>${spring.version}version>
        dependency>
 
        
        <dependency>
            <groupId>org.mybatis.cachesgroupId>
            <artifactId>mybatis-ehcacheartifactId>
            <version>${mybatis.ehcache.version}version>
        dependency>
        
        <dependency>
            <groupId>net.sf.ehcachegroupId>
            <artifactId>ehcacheartifactId>
            <version>${ehcache.version}version>
        dependency>
 
        <dependency>
            <groupId>redis.clientsgroupId>
            <artifactId>jedisartifactId>
            <version>${redis.version}version>
        dependency>
        <dependency>
            <groupId>org.springframework.datagroupId>
            <artifactId>spring-data-redisartifactId>
            <version>${redis.spring.version}version>
        dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-databindartifactId>
            <version>${jackson.version}version>
        dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-coreartifactId>
            <version>${jackson.version}version>
        dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-annotationsartifactId>
            <version>${jackson.version}version>
        dependency>
 
        
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-dbcp2artifactId>
            <version>${commons.dbcp2.version}version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-pool2artifactId>
                    <groupId>org.apache.commonsgroupId>
                exclusion>
            exclusions>
        dependency>
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-pool2artifactId>
            <version>${commons.pool2.version}version>
        dependency>
 
        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>${spring.version}version>
        dependency>
 
        
 
        
        
        
        <dependency>
            <groupId>org.slf4jgroupId>
            <artifactId>slf4j-apiartifactId>
            <version>${slf4j.version}version>
        dependency>
        <dependency>
            <groupId>org.slf4jgroupId>
            <artifactId>jcl-over-slf4jartifactId>
            <version>${slf4j.version}version>
            <scope>runtimescope>
        dependency>
 
        
        <dependency>
            <groupId>org.apache.logging.log4jgroupId>
            <artifactId>log4j-apiartifactId>
            <version>${log4j2.version}version>
        dependency>
        <dependency>
            <groupId>org.apache.logging.log4jgroupId>
            <artifactId>log4j-coreartifactId>
            <version>${log4j2.version}version>
        dependency>
        
        <dependency>
            <groupId>org.apache.logging.log4jgroupId>
            <artifactId>log4j-slf4j-implartifactId>
            <version>${log4j2.version}version>
        dependency>
        
        <dependency>
            <groupId>org.apache.logging.log4jgroupId>
            <artifactId>log4j-webartifactId>
            <version>${log4j2.version}version>
            <scope>runtimescope>
        dependency>
 
        
        <dependency>
            <groupId>com.lmaxgroupId>
            <artifactId>disruptorartifactId>
            <version>${log4j2.disruptor.version}version>
        dependency>
 
        
        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>${junit.version}version>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>javax.servlet-apiartifactId>
            <version>${servlet.version}version>
            <scope>providedscope>
        dependency>
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <version>${lombok.version}version>
            <scope>providedscope>
        dependency>
        <dependency>
            <groupId>jstlgroupId>
            <artifactId>jstlartifactId>
            <version>${jstl.version}version>
        dependency>
        <dependency>
            <groupId>taglibsgroupId>
            <artifactId>standardartifactId>
            <version>${standard.version}version>
        dependency>
        <dependency>
            <groupId>org.apache.tomcatgroupId>
            <artifactId>tomcat-jsp-apiartifactId>
            <version>${tomcat-jsp-api.version}version>
        dependency>
        <dependency>
            <groupId>commons-fileuploadgroupId>
            <artifactId>commons-fileuploadartifactId>
            <version>${commons-fileupload.version}version>
        dependency>
 
        <dependency>
            <groupId>org.hibernategroupId>
            <artifactId>hibernate-validatorartifactId>
            <version>${hibernate-validator.version}version>
        dependency>
 
        
        <dependency>
            <groupId>org.apache.shirogroupId>
            <artifactId>shiro-coreartifactId>
            <version>${shiro.version}version>
        dependency>
        <dependency>
            <groupId>org.apache.shirogroupId>
            <artifactId>shiro-webartifactId>
            <version>${shiro.version}version>
        dependency>
        <dependency>
            <groupId>org.apache.shirogroupId>
            <artifactId>shiro-springartifactId>
            <version>${shiro.version}version>
        dependency>
    dependencies>

2.导入配置文件(小编上传资源)

 3.修改xml文件

"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_3_1.xsd"
         version="3.1">
  <display-name>Archetype Created Web Applicationdisplay-name>
  
  
  <context-param>
    <param-name>contextConfigLocationparam-name>
    <param-value>classpath:spring-context.xmlparam-value>
  context-param>
  
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
  listener>
  
 
  
  <filter>
    <filter-name>encodingFilterfilter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
    <async-supported>trueasync-supported>
    <init-param>
      <param-name>encodingparam-name>
      <param-value>UTF-8param-value>
    init-param>
  filter>
  <filter-mapping>
    <filter-name>encodingFilterfilter-name>
    <url-pattern>/*url-pattern>
  filter-mapping>
 
  
  <servlet>
    <servlet-name>SpringMVCservlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    
    <init-param>
      <param-name>contextConfigLocationparam-name>
      <param-value>classpath:spring-mvc.xmlparam-value>
    init-param>
    <load-on-startup>1load-on-startup>
    
    <async-supported>trueasync-supported>
  servlet>
  <servlet-mapping>
    <servlet-name>SpringMVCservlet-name>
    <url-pattern>/url-pattern>
  servlet-mapping>
web-app>

4.点击创建自动生成代码

在book的类里面重写tostring方法！

5.写一个类用于处理页面跳转

package com.lz.controller;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
 
/**
 * @author lz
 * @create 2023-09-07 16:21
 */
@Controller
public class PageController {
 
    @RequestMapping("/page/{page}")
    public   String  toPage(@PathVariable("page")String page){
 
        return  page;
    }
 
 
    @RequestMapping("/page/{dir}{page}")
    public   String  toDirPage(@PathVariable("dir")String dir,
                               @PathVariable("page")String page ){
 
        return  dir + "/" +  page;
    }
}

二.正式启动SpringMVC的CRUD

1.建立接口，调用自动生成的接口

package com.lz.Biz;
 
import com.lz.model.Book;
import com.lz.utlis.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);
 
    ListlistPager (Book  book, PageBean  pageBean);
}

实现接口的方法，并且用@serverce注解被spring管理，@Autowries调用Book.xml

文件

package com.lz.Biz;
 
import com.lz.mapper.BookMapper;
import com.lz.model.Book;
import com.lz.utlis.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
import java.util.List;
 
/**
 * @author lz
 * @create 2023-09-08 9:32
 *
 */
@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.updateByPrimaryKey(record);
    }
 
    @Override
    public int updateByPrimaryKey(Book record) {
        return bookMapper.updateByPrimaryKey(record);
    }
 
    @Override
    public List listPager(Book book, PageBean pageBean) {
         return bookMapper.listPager(book);
}

2.构建分页代码

2.1书写BookMapper.xml中分页的方法

 
  <select id="listPager" resultType="com.lz.model.Book" parameterType="com.lz.model.Book" >
    select
    <include refid="Base_Column_List" />
    from t_mvc_book
    <where>
      <if test="bname !=null">
        and  cname  like  concat ('%',#{bname},'%')
      if>
    where>
  select>

2.2调用分页的方法

List listPager(Book  book);

2.3导入一个工具类用于分页实现

package com.lz.tag;
 
import com.lz.utlis.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("	
);