springmvc + jdbcTemplate + mysql

         使用springmv 和 springjdbc  加上mysql数据库做了个练习，具体的代码如下:

         1.web.xml

         <?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- 注册springmvc核心控制器 -->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

<!-- 注册争对POST请求的编码器 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

</web-app>          spring-emp.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: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-3.0.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-3.0.xsd

">

<!-- 1. 数据源对象: C3P0连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>
<property name="initialPoolSize" value="3"></property>
<property name="maxPoolSize" value="10"></property>
<property name="maxStatements" value="100"></property>
<property name="acquireIncrement" value="2"></property>
</bean>

<!-- 2. 创建JdbcTemplate对象 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>

<!-- dao 实例 -->
<bean id="empDaoID" class="com.example.emp.dao.UserDao">
<property name="jdbcTemplate" ref="jdbcTemplate"></property>
</bean>

<!-- 注册EmpService类 -->
<bean id="empServiceID" class="com.example.emp.service.EmpService">
<property name="empDao" ref="empDaoID"/>
</bean>

<!-- 注册Action -->
<bean name="/add.do" class="com.example.emp.action.EmpAction">
<property name="empService" ref="empServiceID"/>
</bean>

<!-- 映射器 -->
<!-- 适配器 -->

<!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>

</beans>

3.EmpAction
package com.example.emp.action;

import java.text.SimpleDateFormat;
import java.util.Date;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.validation.BindException;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractCommandController;

import com.example.emp.entity.Emp;
import com.example.emp.service.EmpService;

/**
* 员工管理模块
* 控制器
* @author AdminTC
*/
@SuppressWarnings("deprecation")
public class EmpAction extends AbstractCommandController{
//业务层
private EmpService empService;
public void setEmpService(EmpService empService) {
this.empService = empService;
}
//将表单参数封装到Emp实体中
public EmpAction(){
this.setCommandClass(Emp.class);
}
//自定义String->Date的转换器
@Override
protected void initBinder(HttpServletRequest request,ServletRequestDataBinder binder) throws Exception {
binder.registerCustomEditor(
Date.class,
new CustomDateEditor(new SimpleDateFormat("dd-MM-yy"),true));
}
@Override
protected ModelAndView handle(
HttpServletRequest request,
HttpServletResponse response,
Object obj,
BindException error)
throws Exception {
ModelAndView modelAndView = new ModelAndView();
Emp emp = (Emp) obj;
System.out.println(emp.getHiredate());
empService.register(emp);

modelAndView.addObject("message","操作成功");
modelAndView.setViewName("success");
return modelAndView;
}
}



2.dao
package com.example.emp.dao;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;

import javax.sql.DataSource;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.jdbc.core.RowMapper;

import com.example.emp.Dept;
import com.example.emp.entity.Emp;

public class UserDao {

// IOC容器注入
// private DataSource dataSource;
// public void setDataSource(DataSource dataSource) {
// this.dataSource = dataSource;
// }

private JdbcTemplate jdbcTemplate;
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}

public void save(Emp emp) {
String id = "8";
String sql = "insert into emps values( " + id + "," + "'" + emp.getUsername() + "'" + "," + "'" + emp.getSalary() + "'" + "," + "'" + emp.getHiredate() + "'" + " );";
jdbcTemplate.update(sql);
}

public Dept findById(int id) {
String sql = "select * from Dept where deptId=?";
List<Dept> list = jdbcTemplate.query(sql,new MyResult(), id);
return (list!=null && list.size()>0) ? list.get(0) : null;
}

public List<Dept> getAll() {
String sql = "select * from t_dept";
List<Dept> list = jdbcTemplate.query(sql, new MyResult());
return list;
}

class MyResult implements RowMapper<Dept>{
// 如何封装一行记录
public Dept mapRow(ResultSet rs, int arg1) throws SQLException {
Dept dept = new Dept();
dept.setDeptId(rs.getInt("deptId"));
dept.setDeptName(rs.getString("deptName"));
return dept;
}

}
}



3.service
package com.example.emp.service;

import com.example.emp.dao.UserDao;
import com.example.emp.entity.Emp;

/**
* 员工管理模块
* 业务层实现类
* @author AdminTC
*/
public class EmpService {
private UserDao empDao;
public void setEmpDao(UserDao empDao) {
this.empDao = empDao;
}
/**
* 增加员工
*/
public void register(Emp emp) throws Exception{
empDao.save(emp);
}
}



4.entity
package com.example.emp.entity;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

/**
* 员工
* @author AdminTC
*/
public class Emp {
private String id;//编号
private String username;//姓名
private String salary;//薪水
private String hiredate;//入职时间
public Emp(){}
public String getId() {
return UUID.randomUUID().toString();
}
public void setId(String id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getSalary() {
return salary;
}
public void setSalary(String salary) {
this.salary = salary;
}
public String getHiredate() {
return hiredate;
}
public void setHiredate(String hiredate) {
this.hiredate = hiredate;
}
}