IDEA整合SSM框架实现网页上显示数据
我们来整合SSM框架
第一步、
创建一个maven工程。配置Tomcat,并测试是否正常访问HelloWorld.
这一步就省略了。
不懂得看这个博客:
idea创建maven项目
创建出来是这样的:
我们从这里开始整合ssm。
第二步、
在pom.xml导入依赖,以下依赖是ssm常用的一些依赖,都导进去,没有坏处。
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<jackson.version>2.9.0</jackson.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<!-- aop联盟,提供了aop规范,Spring AOP就是实现了这个规范 -->
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency>
<!-- aspectj,实现了aop规范,比spring AOP实现的使用起来简单,所以引入它 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.2</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>2.8.0</version>
</dependency>
<!-- 集成aspectjweaver -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<!--spring集成测试 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<!-- mybatis -->
<!-- mysql数据库驱动,以及使用的数据源 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.46</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<!-- mybatis依赖,spring对jdbc的支持,spring集成mybatis以及对事务的支持 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
</dependency>
<!-- JSONObject的依赖 -->
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.7.0</version>
</dependency>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>net.sf.ezmorph</groupId>
<artifactId>ezmorph</artifactId>
<version>1.0.3</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.6</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2-rev-1</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-spec</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>org.apache.taglibs</groupId>
<artifactId>taglibs-standard-impl</artifactId>
<version>1.2.5</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>easyexcel</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>class="lazy" data-src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
</resources>
</build>
第三步、
创建数据表。
创建一个名称为category_的数据表,只有两个字段,一个id, 一个name,id自增。随便插入点数据。
DROP TABLE IF EXISTS `category_`;
CREATE TABLE `category_` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records
-- ----------------------------
INSERT INTO `category_` VALUES ('1', 'sadf');
INSERT INTO `category_` VALUES ('2', 'safa');
INSERT INTO `category_` VALUES ('3', 'adfasdfas');
INSERT INTO `category_` VALUES ('4', '张阿道夫');
INSERT INTO `category_` VALUES ('5', '违法收费');
INSERT INTO `category_` VALUES ('6', '发生的v');
INSERT INTO `category_` VALUES ('7', 'sdfsd');
INSERT INTO `category_` VALUES ('8', '34535');
第四步、
编写实体类;DAO层;Service层;Controller层。
像我这样,在java文件夹目录下,创建这几个包。
然后在包下创建对应的java文件或配置文件,最终的项目结构是这样的:
(那些打马赛克的东西你们用不到,小孩子别看那些。)
接下来开始写实体类:
实体类名称最好见名知意,跟数据表名称要对上。因为使用了lombok插件,所以使用@Data注解,减少代码量。
Category.java
package com.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Category {
private int id;
private String name;
}
然后是DAO层,这里写的多是接口,只写方法,不实现。
CategoryDao.java
package com.dao;
import com.entity.Category;
import java.util.List;
public interface CategoryDao {
public int add(Category category);
public void delete(int id);
public Category get(int id);
public int update(Category category);
public List<Category> list();
}
然后在DAO层下创建对应的Mapper.xml文件。
注意namespace要对上,还有id对应上方法名。
CategoryMapper.xml
<?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.dao.CategoryDao">
<insert id="add" parameterType="Category" >
insert into category_ ( name ) values (#{name})
</insert>
<delete id="delete" parameterType="Category" >
delete from category_ where id= #{id}
</delete>
<select id="get" parameterType="_int" resultType="Category">
select * from category_ where id= #{id}
</select>
<update id="update" parameterType="Category" >
update category_ set name=#{name} where id=#{id}
</update>
<select id="list" resultType="Category">
select * from category_
</select>
</mapper>
然后是Service层,这里才是你要实现业务的地方。这里也是接口,在impl实现类里才是写真正实现的。
这里只实现一个:查询所有数据。
CategoryService.java
package com.service;
import com.entity.Category;
import java.util.List;
public interface CategoryService {
List<Category> list();
}
然后写实现类。
CategoryServiceImpl.java
package com.service.impl;
import com.dao.CategoryDao;
import com.entity.Category;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.service.CategoryService;
import java.util.List;
@Service
public class CategoryServiceImpl implements CategoryService {
@Autowired
CategoryDao categoryDao;
@Override
public List<Category> list() {
return categoryDao.list();
}
}
然后写Controller层。
IndexController.java
package com.controller;
import com.entity.Category;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.ModelAndView;
import com.service.CategoryService;
import java.util.ArrayList;
import java.util.List;
@Controller
@RequestMapping("/")
public class IndexController {
@Autowired
CategoryService categoryService;
@RequestMapping("listCategory")
public ModelAndView listCategory(){
ModelAndView mav = new ModelAndView();
List<Category> cs= categoryService.list();
// 放入转发参数
mav.addObject("cs", cs);
// 放入jsp路径
mav.setViewName("listCategory");
return mav;
}
}
OK,写到这里,你已经成功一半啦!给自己鼓鼓掌!
接下来,我们一鼓作气,写好配置文件并访问数据吧!
第五步、
编写配置文件。
在resources目录下,创建两个配置文件。
注意把数据库,密码,改成自己的,
applicationContext.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:annotation-config />
<context:component-scan base-package="com.service" />
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost:3306/ssm?characterEncoding=UTF-8</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>root</value>
</property>
</bean>
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="typeAliasesPackage" value="com.entity" />
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:com/dao/*.xml"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.dao"/>
</bean>
</beans>
springMVC.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<context:annotation-config/>
<context:component-scan base-package="com.controller">
<context:include-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
</mvc:message-converters>
</mvc:annotation-driven>
<mvc:default-servlet-handler />
<!-- 视图定位 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
最后就是web.xml了。
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<!-- spring的配置文件-->
<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>
<!-- spring mvc核心:分发servlet -->
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- spring mvc的配置文件 -->
<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>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
第六步、
创建listCategory.jsp文件。
在WEB-INF目录下创建jsp文件夹,将jsp文件都放在这里,因为我们在springMVC.xml中配置过的,就不过多解释了。
不知道在哪创建的可以回头看一下我的那个项目路径,根据那个来即可
listCategory.jsp
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2021/5/12
Time: 12:46
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java"
pageEncoding="UTF-8" import="java.util.*"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
<title>Title</title>
</head>
<body>
<table align='center' border='1' cellspacing='0'>
<tr>
<td>id</td>
<td>name</td>
</tr>
<c:forEach items="${cs}" var="c" varStatus="st">
<tr>
<td>${c.id}</td>
<td>${c.name}</td>
</tr>
</c:forEach>
</table>
</body>
</html>
这里得到数据的思路我就不多说了吧,懂得都懂。就是jsp页面中通过jstl标签来获取到Controller中返回的数据。
OK,到这里,大功告成!启动Tomcat,测试一下。
没问题吧,注意这里的访问路径,http://localhost:8885/listCategory ,不是直接访问jsp页面,是访问controller中的请求路径。
ok,就到这吧,
这里有一个小小的改进,就是controller的改变,使用@ResponseBody注解来返回数据,然后前端通过ajax来异步请求数据。
ListController.java
package com.controller;
import com.entity.Category;
import com.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@Controller
@RequestMapping("/")
public class ListController {
@Autowired
CategoryService categoryService;
@RequestMapping("list/allCategory")
@ResponseBody
public List<Category> findAll(){
List<Category> list = categoryService.list();
System.out.println(list.size());
return list;
}
@RequestMapping("/listall")
public String listAll(){
return "listall";
}
}
在jsp文件夹下创建listall.jsp页面。
listall.jsp
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2021/5/14
Time: 10:05
To change this template use File | Settings | File Templates.
--%>
<%@ page isELIgnored="false"%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="f" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
<title>首页</title>
</head>
<body>
<input type="button" id="btn" value="获取数据"/>
<table width="80%" align="center">
<tr>
<td>id</td>
<td>姓名</td>
</tr>
<tbody id="content">
</tbody>
</table>
<script class="lazy" data-src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js">
</script>
<script type="text/javascript">
$(function () {
$('#btn').click(function () {
$.post("list/allCategory",function (data) {
console.log(data);
var html = "";
for(var i = 0; i <data.length;i++){
html += "<tr>" +
"<td>"+ data[i].id+"</td>"+
"<td>"+ data[i].name+"</td>"+
+"</tr>";
}
$('#content').html(html);
})
})
})
</script>
</body>
</html>
然后访问测试listall页面:
先访问list/allCategory请求路径,看看数据是否正常回显。
然后访问listall, 点击一下获取数据,OK,没问题吧,老铁们。
到此这篇关于IDEA整合SSM框架实现网页上显示数据的文章就介绍到这了,更多相关IDEA整合SSM内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!
免责声明:
① 本站未注明“稿件来源”的信息均来自网络整理。其文字、图片和音视频稿件的所属权归原作者所有。本站收集整理出于非商业性的教育和科研之目的,并不意味着本站赞同其观点或证实其内容的真实性。仅作为临时的测试数据,供内部测试之用。本站并未授权任何人以任何方式主动获取本站任何信息。
② 本站未注明“稿件来源”的临时测试数据将在测试完成后最终做删除处理。有问题或投稿请发送至: 邮箱/279061341@qq.com QQ/279061341