SSM項目搭建實現增刪改查

CREATE TABLE category_ (
id int(11) NOT NULL AUTO_INCREMENT,
name varchar(30) ,
PRIMARY KEY (id)
) DEFAULT CHARSET=UTF8;
insert into category_ values(null,“category1”);
insert into category_ values(null,“category2”);
insert into category_ values(null,“category3”);
insert into category_ values(null,“category4”);
insert into category_ values(null,“category5”);
步驟 1 :創建一個maven項目


包名com.category

下一步

下一步

步驟 2 : Maven import
每次新建Maven項目，或者pom.xml有改動，都會有這個提示，這次點擊Enable Auto-Import，自動導入，省掉麻煩。

步驟 3 : 新建java源代碼目錄頂折
maven web項目默認是沒有java源代碼目錄的，所以需要手動創建，並設置其爲源代碼目錄
右鍵main目錄-> New->Directory->輸入java->右鍵java->Mark Directory as-> Sources Root
這樣就創建了存放java源文件的目錄了

resources文件就選擇Resource Root
步驟 4 : 修改pom.xml

<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>
  <groupId>com.how2java</groupId>
  <artifactId>ssm</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

  <properties>
    <spring.version>4.1.3.RELEASE</spring.version>
    <pagehelper.version>5.1.2-beta</pagehelper.version>
    <mysql.version>5.1.6</mysql.version>
    <mybatis.spring.version>1.2.3</mybatis.spring.version>
    <mybatis.version>3.1.1</mybatis.version>
    <junit.version>4.12</junit.version>
    <jstl.version>1.2</jstl.version>
    <jsqlparser.version>1.0</jsqlparser.version>
    <jackson.version>1.2.7</jackson.version>
    <servlet-api.version>3.1.0</servlet-api.version>
    <druid.version>1.0.18</druid.version>
    <log4j.version>1.2.16</log4j.version>
    <commons-logging.version>1.2</commons-logging.version>
    <commons-fileupload.version>1.2.1</commons-fileupload.version>
    <commons-io.version>1.3.2</commons-io.version>
    <commons-lang.version>2.6</commons-lang.version>
    <aopalliance.version>1.0</aopalliance.version>
    <mybatis-generator.version>1.3.5</mybatis-generator.version>
  </properties>

  <dependencies>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>${junit.version}</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>${mybatis.spring.version}</version>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>${druid.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</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-aspects</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- JSP相關 -->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>${jstl.version}</version>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>${servlet-api.version}</version>
      <scope>provided</scope>
    </dependency>

    <!-- pageHelper -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>${pagehelper.version}</version>
    </dependency>

    <!--jsqlparser-->
    <dependency>
      <groupId>com.github.jsqlparser</groupId>
      <artifactId>jsqlparser</artifactId>
      <version>${jsqlparser.version}</version>
    </dependency>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>

    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>${commons-logging.version}</version>
    </dependency>

    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>${commons-fileupload.version}</version>
    </dependency>

    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>${commons-io.version}</version>
    </dependency>

    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>${commons-lang.version}</version>
    </dependency>

    <dependency>
      <groupId>aopalliance</groupId>
      <artifactId>aopalliance</artifactId>
      <version>${aopalliance.version}</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>${mybatis-generator.version}</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>${project.artifactId}</finalName>
    <plugins>
      <!-- 資源文件拷貝插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-resources-plugin</artifactId>
        <version>2.7</version>
        <configuration>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
      <!-- java編譯插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.2</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
    </plugins>
    <pluginManagement>
      <plugins>
        <!-- 配置Tomcat插件 -->
        <plugin>
          <groupId>org.apache.tomcat.maven</groupId>
          <artifactId>tomcat7-maven-plugin</artifactId>
          <version>2.2</version>
        </plugin>
      </plugins>
    </pluginManagement>

    <resources>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
          <include>**/*.tld</include>
        </includes>
        <filtering>false</filtering>
      </resource>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>

  </build>

</project>

步驟 5 : 修改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.category.service" />
	<context:property-placeholder location="classpath:database.properties"/>

	<!-- 新增Druid連接池-->
	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
	  <property name="driverClassName" value="${driver}"/>
	  <property name="url" value="${url}"/>
	  <property name="username" value="${user}"/>
	  <property name="password" value="${password}"/>
	  
		<!-- 配置初始化大小、最小、最大 -->
		<property name="initialSize" value="3" />
		<property name="minIdle" value="3" />
		<property name="maxActive" value="20" />

		<!-- 配置獲取連接等待超時的時間 -->
		<property name="maxWait" value="60000" />

		<!-- 配置間隔多久才進行一次檢測，檢測需要關閉的空閒連接，單位是毫秒 -->
		<property name="timeBetweenEvictionRunsMillis" value="60000" />

		<!-- 配置一個連接在池中最小生存的時間，單位是毫秒 -->
		<property name="minEvictableIdleTimeMillis" value="300000" />

		<property name="validationQuery" value="SELECT 1" />
		<property name="testWhileIdle" value="true" />
		<property name="testOnBorrow" value="false" />
		<property name="testOnReturn" value="false" />

		<!-- 打開PSCache，並且指定每個連接上PSCache的大小 -->
		<property name="poolPreparedStatements" value="true" />
		<property name="maxPoolPreparedStatementPerConnectionSize" value="20" />
	</bean>

	<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="typeAliasesPackage" value="com.category.pojo" />
		<property name="dataSource" ref="dataSource"/>
		<property name="mapperLocations" value="classpath:mapper/*.xml"/>
		<!--PageHelper插件配置 -->
		<property name="plugins">
		    <array>
		      <bean class="com.github.pagehelper.PageInterceptor">
		        <property name="properties">
		          <!--使用下面的方式配置參數，一行配置一個 -->
		          <value>
		          </value>
		        </property>
		      </bean>
		    </array>
		  </property>		
	</bean>

	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.category.mapper"/>
	</bean>
	


</beans>

步驟 6 : 修改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.category.controller">
          <context:include-filter type="annotation" 
          expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <mvc:annotation-driven />
    
    <mvc:default-servlet-handler />

    <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>

步驟 7 : 修改database.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/how2java?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
user=root
password=1234

步驟 8 : 添加Category.java

package com.category.pojo;

public class Category {
	private int id;
	private String name;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	@Override
	public String toString() {
		return "Category [id=" + id + ", name=" + name + "]";
	}
	
	
	
}

步驟 9 : 添加CategoryMapper.java

package com.category.mapper;

import java.util.List;

import com.category.pojo.Category;
import com.category.util.Page;

public interface CategoryMapper {


 public int add(Category category);


 public void delete(int id);


 public Category get(int id);


 public int update(Category category);


 public List<Category> list();

 public List<Category> list(Page page);


 public int total();



}

步驟 10 : 添加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.category.mapper.CategoryMapper">
	<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_ order by id ASC
		<if test="start!=null and count!=null">
			limit #{start},#{count}
		</if>

	</select>
	<select id="total" resultType="int">
		select count(*) from   category_
	</select>
</mapper>

步驟 11 : 添加CategoryService.java

package com.category.service;

import java.util.List;

import com.category.pojo.Category;
import com.category.util.Page;

public interface CategoryService {

	List<Category> list();
	int total();
	List<Category> list(Page page);
	void add(Category c);
	void update(Category c);
	void delete(Category c);
	Category get(int id);

}

步驟 12 : 添加CategoryServiceImpl.java

package com.category.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.category.mapper.CategoryMapper;
import com.category.pojo.Category;
import com.category.service.CategoryService;
import com.category.util.Page;

@Service
public class CategoryServiceImpl  implements CategoryService{
	@Autowired
	CategoryMapper categoryMapper;


	public List<Category> list(){
		return categoryMapper.list();
	}


	@Override
	public List<Category> list(Page page) {
		// TODO Auto-generated method stub
		return categoryMapper.list(page);
	}


	@Override
	public int total() {
		return categoryMapper.total();
	}


	@Override
	public void add(Category c) {
		categoryMapper.add(c);

	}


	@Override
	public void update(Category c) {
		categoryMapper.update(c);
	}


	@Override
	public void delete(Category c) {
		categoryMapper.delete(c.getId());
	}


	@Override
	public Category get(int id) {
		// TODO Auto-generated method stub
		return categoryMapper.get(id);
	}

}

步驟 13 : 添加Page.java

package com.category.util;

public class Page {

	int start=0;
	int count = 5;
	int last = 0;
	public int getStart() {
		return start;
	}
	public void setStart(int start) {
		this.start = start;
	}
	public int getCount() {
		return count;
	}
	public void setCount(int count) {
		this.count = count;
	}
	public int getLast() {
		return last;
	}
	public void setLast(int last) {
		this.last = last;
	}
	
	public void caculateLast(int total) {
	    // 假設總數是50，是能夠被5整除的，那麼最後一頁的開始就是45
	    if (0 == total % count)
	        last = total - count;
	    // 假設總數是51，不能夠被5整除的，那麼最後一頁的開始就是50
	    else
	        last = total - total % count;		
	}

	
	
	
}

步驟 13 : 添加CategoryController.java

package com.category.controller;


import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.category.pojo.Category;
import com.category.service.CategoryService;
import com.category.util.Page;

// 告訴spring mvc這是一個控制器類
@Controller
@RequestMapping("")
public class CategoryController {
	@Autowired
	CategoryService categoryService;

	@RequestMapping("listCategory")
	public ModelAndView listCategory(Page page){
		ModelAndView mav = new ModelAndView();
		PageHelper.offsetPage(page.getStart(),page.getCount());//第二個參數根據page的count值設置頁面大小
		//	PageHelper.offsetPage(page.getStart(),5);
		List<Category> cs= categoryService.list();
		int total = (int) new PageInfo<>(cs).getTotal();

		page.caculateLast(total);

		// 放入轉發參數
		mav.addObject("cs", cs);
		// 放入jsp路徑
		mav.setViewName("listCategory");
		return mav;
	}

	@RequestMapping("addCategory")
	public ModelAndView addCategory(Category category){
		categoryService.add(category);
		ModelAndView mav = new ModelAndView("redirect:/listCategory");
		return mav;
	}
	@RequestMapping("deleteCategory")
	public ModelAndView deleteCategory(Category category){
		categoryService.delete(category);
		ModelAndView mav = new ModelAndView("redirect:/listCategory");
		return mav;
	}
	@RequestMapping("editCategory")
	public ModelAndView editCategory(Category category){
		Category c= categoryService.get(category.getId());
		ModelAndView mav = new ModelAndView("editCategory");
		mav.addObject("c", c);
		return mav;
	}
	@RequestMapping("updateCategory")
	public ModelAndView updateCategory(Category category){
		categoryService.update(category);
		ModelAndView mav = new ModelAndView("redirect:/listCategory");
		return mav;
	}

}

步驟 14 : 添加editCategory.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" import="java.util.*"%>
 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 
 <div style="width:500px;margin:0px auto;text-align:center">
	
	
	<div style="text-align:center;margin-top:40px">
		
		<form method="post" action="updateCategory">
			分類名稱： <input name="name" value="${c.name}" type="text"> <br><br>
			<input type="hidden" value="${c.id}" name="id">
			<input type="submit" value="增加分類">
		</form>

	</div>	
 </div>

步驟 15 : 添加listCategory.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" import="java.util.*"%>
 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 
 <div style="width:500px;margin:0px auto;text-align:center">
	<table align='center' border='1' cellspacing='0'>
	    <tr>
	        <td>id</td>
	        <td>name</td>
	        <td>編輯</td>
	        <td>刪除</td>
	    </tr>
	    <c:forEach items="${cs}" var="c" varStatus="st">
	        <tr>
	            <td>${c.id}</td>
	            <td>${c.name}</td>
	            <td><a href="editCategory?id=${c.id}">編輯</a></td>
	            <td><a href="deleteCategory?id=${c.id}">刪除</a></td>
	        </tr>
	    </c:forEach>
	</table>
	<div style="text-align:center">
	<a href="?start=0">首 頁</a>
		<c:choose>
			<c:when test="${(page.start-page.count) >= 0}">
				<a href="?start=${page.start - page.count}">上一頁</a>
			</c:when>
			<c:otherwise>
				<a href="?start=0">上一頁</a>
			</c:otherwise>
		</c:choose>

		<c:choose>
			<c:when test="${(page.start + page.count) > page.last}">
				<a href="?start=${page.last}">下一頁</a>
			</c:when>
			<c:otherwise>
				<a href="?start=${page.start + page.count}">下一頁</a>
			</c:otherwise>
		</c:choose>
		<a href="?start=${page.last}">末 頁</a>
	</div>
	
	
	<div style="text-align:center;margin-top:40px">
		
		<form method="post" action="addCategory">
			分類名稱： <input name="name" value="" type="text"> <br><br>
			<input type="submit" value="增加分類">
		</form>

	</div>	
 </div>

步驟 16 : 啓動tomcat






啓動tomcat
最後瀏覽器上
http://localhost:8080/listCategory