关于SpringMVC与JDBC结合实现对数据库增删改查（适合初学者理解JDBC使用，但是对于SpringMVC框架使用了扫描，不太适合初学者）

第一步，创建数据库，根据库创建表，并插入数据；

CREATE DATABASE user;

USE user;

CREATE TABLE dept(

 did INT(4) NOT NULL PRIMARY KEY AUTO_INCREMENT,

dname VARCHAR(50),

dhobby VARCHAR(255)

)CHARSET UTF8;

INSERT INTO dept VALUES(NULL,"sdafs","sadfe")............

第二步，创建项目,项目如下

1.导包，搭建Spring环境，需要的包如下

aopalliance-1.0.jar
aspectjweaver-1.6.9.jar
commons-logging-1.1.1.jar
jstl.jar
log4j-1.2.17.jar
mysql-connector-java-5.1.0-bin.jar
spring-aop-3.2.13.RELEASE.jar
spring-beans-3.2.13.RELEASE.jar
spring-context-3.2.13.RELEASE.jar
spring-core-3.2.13.RELEASE.jar
spring-expression-3.2.13.RELEASE.jar
spring-web-3.2.13.RELEASE.jar
spring-webmvc-3.2.13.RELEASE.jar
standard.jar

2，创建实体类

package com.bdqn.entity;

import java.io.Serializable;

public class Dept implements Serializable{
   /**
    * 
    */
   private static final long serialVersionUID = 1L;
   
   private Integer did;
   private String dname;
   private String dhobby;
   public Integer getDid() {
      return did;
   }
   public void setDid(Integer did) {
      this.did = did;
   }
   public String getDname() {
      return dname;
   }
   public void setDname(String dname) {
      this.dname = dname;
   }
   public String getDhobby() {
      return dhobby;
   }
   public void setDhobby(String dhobby) {
      this.dhobby = dhobby;
   }
   @Override
   public String toString() {
      return "Dept [did=" + did + ", dname=" + dname + ", dhobby=" + dhobby
            + "]";
   }
   
   
}

3.创建utils工具类，加载数据库

package com.bdqn.utils;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class ConfigManager {
   private static ConfigManager configManager;
   private static Properties properties;
   
   private ConfigManager(){
      try {
         properties = new Properties();
         InputStream is = ConfigManager.class.getClassLoader().getResourceAsStream("database.properties");
         properties.load(is);
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
   
   public static synchronized ConfigManager getConfigManager(){
      if (configManager == null) {
         synchronized (ConfigManager.class) {
            configManager = new ConfigManager();
         }
      }
      return configManager;
   }
   
   public String getValues(String key){
      return properties.getProperty(key);
   }
}

4.创建dao层下的基础类和接口

package com.bdqn.utils;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class ConfigManager {
   private static ConfigManager configManager;
   private static Properties properties;
   
   private ConfigManager(){
      try {
         properties = new Properties();
         InputStream is = ConfigManager.class.getClassLoader().getResourceAsStream("database.properties");
         properties.load(is);
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
   
   public static synchronized ConfigManager getConfigManager(){
      if (configManager == null) {
         synchronized (ConfigManager.class) {
            configManager = new ConfigManager();
         }
      }
      return configManager;
   }
   
   public String getValues(String key){
      return properties.getProperty(key);
   }
}

package com.bdqn.utils;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class ConfigManager {
   private static ConfigManager configManager;
   private static Properties properties;
   
   private ConfigManager(){
      try {
         properties = new Properties();
         InputStream is = ConfigManager.class.getClassLoader().getResourceAsStream("database.properties");
         properties.load(is);
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
   
   public static synchronized ConfigManager getConfigManager(){
      if (configManager == null) {
         synchronized (ConfigManager.class) {
            configManager = new ConfigManager();
         }
      }
      return configManager;
   }
   
   public String getValues(String key){
      return properties.getProperty(key);
   }
}

5.实现接口

package com.bdqn.dao.impl;

import com.bdqn.dao.BaseDao;
import com.bdqn.dao.DeptDao;
import com.bdqn.entity.Dept;
import org.springframework.stereotype.Repository;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
@Repository("DeptDao")
public class DeptDaoImpl extends BaseDao implements DeptDao{

   @Override
   public List selectDept() {
      String sql ="select * from dept";
      ResultSet rs = this.getResultSet(sql, null);
      List list = new ArrayList();
      try {
         while(rs.next()){
            Dept dept = new Dept();
            dept.setDid(rs.getInt("did"));
            dept.setDname(rs.getString("dname"));
            dept.setDhobby(rs.getString("dhobby"));
            list.add(dept);
         }
      } catch (SQLException e) {
         e.printStackTrace();
      }
      
      return list;
   }

   @Override
   public int addDept(Dept dept) {
      String sql = "insert into dept values(?,?,?)";
      Object[] objs={null,dept.getDname(),dept.getDhobby()};
      int num = this.insert(sql, objs);
      return num;
   }

   @Override
   public int deleteDept(String dname) {
      String sql = "delete from dept where dname=?";
      Object[] objs = {dname};
      int num = this.insert(sql, objs);
      return num;
   }

   @Override
   public int updateDept(Dept dept) {
      String sql ="update dept set dname=?,dhobby=? where did=?";
      Object[] objs = {dept.getDname(),dept.getDhobby(),dept.getDid()};
      int num = this.insert(sql, objs);
      return num;
   }

}

6.实现service层

package com.bdqn.dao.impl;

import com.bdqn.dao.BaseDao;
import com.bdqn.dao.DeptDao;
import com.bdqn.entity.Dept;
import org.springframework.stereotype.Repository;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
@Repository("DeptDao")
public class DeptDaoImpl extends BaseDao implements DeptDao{

   @Override
   public List selectDept() {
      String sql ="select * from dept";
      ResultSet rs = this.getResultSet(sql, null);
      List list = new ArrayList();
      try {
         while(rs.next()){
            Dept dept = new Dept();
            dept.setDid(rs.getInt("did"));
            dept.setDname(rs.getString("dname"));
            dept.setDhobby(rs.getString("dhobby"));
            list.add(dept);
         }
      } catch (SQLException e) {
         e.printStackTrace();
      }
      
      return list;
   }

   @Override
   public int addDept(Dept dept) {
      String sql = "insert into dept values(?,?,?)";
      Object[] objs={null,dept.getDname(),dept.getDhobby()};
      int num = this.insert(sql, objs);
      return num;
   }

   @Override
   public int deleteDept(String dname) {
      String sql = "delete from dept where dname=?";
      Object[] objs = {dname};
      int num = this.insert(sql, objs);
      return num;
   }

   @Override
   public int updateDept(Dept dept) {
      String sql ="update dept set dname=?,dhobby=? where did=?";
      Object[] objs = {dept.getDname(),dept.getDhobby(),dept.getDid()};
      int num = this.insert(sql, objs);
      return num;
   }

}

package com.bdqn.service.impl;

import com.bdqn.dao.DeptDao;
import com.bdqn.entity.Dept;
import com.bdqn.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Service("deptService")
public class DeptServiceImpl implements DeptService{
   @Autowired
   private DeptDao deptDao;
   
   @Override
   public List selectDept() {
      // TODO Auto-generated method stub
      return deptDao.selectDept();
   }

   @Override
   public int addDept(Dept dept) {
      return deptDao.addDept(dept);
   }

   @Override
   public int deleteDept(String dname) {
      return deptDao.deleteDept(dname);
   }

   @Override
   public int updateDept(Dept dept) {
      return deptDao.updateDept(dept);
   }

}

7.内部测试下，看数据库是否连接上了，以及功能是否都能实现。

package com.bdqn.service.impl;

import com.bdqn.dao.DeptDao;
import com.bdqn.entity.Dept;
import com.bdqn.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Service("deptService")
public class DeptServiceImpl implements DeptService{
   @Autowired
   private DeptDao deptDao;
   
   @Override
   public List selectDept() {
      // TODO Auto-generated method stub
      return deptDao.selectDept();
   }

   @Override
   public int addDept(Dept dept) {
      return deptDao.addDept(dept);
   }

   @Override
   public int deleteDept(String dname) {
      return deptDao.deleteDept(dname);
   }

   @Override
   public int updateDept(Dept dept) {
      return deptDao.updateDept(dept);
   }

}

8.配置web.xml,Spring.xml,applicationContext.xml（此3个文件重要，不能出错）

package com.bdqn.service.impl;

import com.bdqn.dao.DeptDao;
import com.bdqn.entity.Dept;
import com.bdqn.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
@Service("deptService")
public class DeptServiceImpl implements DeptService{
   @Autowired
   private DeptDao deptDao;
   
   @Override
   public List selectDept() {
      // TODO Auto-generated method stub
      return deptDao.selectDept();
   }

   @Override
   public int addDept(Dept dept) {
      return deptDao.addDept(dept);
   }

   @Override
   public int deleteDept(String dname) {
      return deptDao.deleteDept(dname);
   }

   @Override
   public int updateDept(Dept dept) {
      return deptDao.updateDept(dept);
   }

}

xml version="1.0" encoding="UTF-8"?>
xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
   xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
   xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

   <context:component-scan base-package="com.bdqn.controllers" />
   <mvc:annotation-driven />


   
   
         class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      name="prefix" value="/WEB-INF/jsp/" />
      name="suffix" value=".jsp" />