spring-DataSource
spring支持的dataSource有好多，
如：自带的org.springframework.jdbc.datasource.DriverManagerDataSource
ibatis、c3p0、JDBC、hibernate等等；
首先看第一种，使用自带的datasource：
1、项目结构
提示：spring的jar需要放在WEB-INF的lib目录下，只是放在项目的liberaries中会报错！原因：不同的类加载器加载类的时候寻找的是不同路径下的类。
2、web.xml配置
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <!-- 编码过滤器 --> <filter> <filter-name>EncodeFilter</filter-name> <filter-class>com.pt.filter.EncodeFileter</filter-class> </filter> <filter-mapping> <filter-name>EncodeFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 用户管理servlet --> <servlet> <servlet-name>userManager</servlet-name> <servlet-class>com.pt.UserManager</servlet-class> </servlet> <servlet-mapping> <servlet-name>userManager</servlet-name> <url-pattern>/user</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- 自动加载spring配置文件 --> <context-param> <!-- 配置文件路径 --> <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> </web-app>
3、spring的配置文件
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <!-- 配置数据源 --> <bean name="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://192.168.61.28:3306/test" /> <property name="username" value="encysys48" /> <property name="password" value="encysys48" /> </bean> <bean id = "user" class = "com.pt.Users" scope="singleton"> </bean> </beans>
4、spring的datasource的使用
package com.pt; import java.io.IOException; import java.sql.Connection; import java.sql.Statement; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.sql.DataSource; import org.springframework.context.ApplicationContext; import org.springframework.web.context.ContextLoader; public class UserManager extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // TODO Auto-generated method stub doPost(req,resp); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // TODO Auto-generated method stub resp.setCharacterEncoding("GBK"); //获取spring上下文 ApplicationContext ctx = ContextLoader.getCurrentWebApplicationContext(); DataSource ds = (DataSource)ctx.getBean("dataSource"); Connection conn=null; Statement stmt = null; try{ conn=ds.getConnection(); stmt = conn.createStatement(); if(conn!=null){ resp.getWriter().write("获取connection成功"); resp.getWriter().write("\n"); }else{ resp.getWriter().write("获取connection失败"); resp.getWriter().write("\n"); } String sql = "insert into users(id,name) values('2012001','陶伟基')"; stmt.executeUpdate(sql); }catch(Exception ex){ }finally{ try{ conn.close(); stmt.close(); }catch(Exception ex){ } } resp.getWriter().write("测试成功"); } }
5、过滤器
package com.pt.filter; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; public class EncodeFileter implements Filter { public void destroy() { // TODO Auto-generated method stub } public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { // TODO Auto-generated method stub System.out.println("进入编码过滤器"); arg0.setCharacterEncoding("UTF-8"); arg2.doFilter(arg0, arg1); } public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } }
其他文件可以不用写！
二、ibatis数据源
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <!-- 配置数据源 --> <bean id = "dataSource" name="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://192.168.61.28:3306/test" /> <property name="username" value="encysys48" /> <property name="password" value="encysys48" /> </bean> <bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean"> <!-- 注入ibatis的配置文件 --> <property name="configLocations"> <!-- 不加classpath:会出现错误 --> <value>classpath:SqlMapConfig.xml</value> </property> <property name="dataSource"> <!-- 此处填写ID --> <ref local="dataSource"/> </property> </bean> <bean id = "user" class = "com.pt.Users" scope="singleton"> <property name="sqlMapClient" ref="sqlMapClient" /> </bean> </beans>
package com.pt; import org.springframework.orm.ibatis.support.SqlMapClientDaoSupport; public class Users extends SqlMapClientDaoSupport implements DataObjManager { private int id; private String name; private static Users users; public boolean add(Object obj) { // TODO Auto-generated method stub if(obj instanceof Users) getSqlMapClientTemplate().update("addUser", (Users)obj); else System.out.println("输入类型错误！！！"); return false; } public boolean deleteById(Object obj) { // TODO Auto-generated method stub return false; } public Object getById(Object obj) { // TODO Auto-generated method stub return null; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getId() { return id; } public void setId(int id) { this.id = id; } }
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN" "http://ibatis.apache.org/dtd/sql-map-2.dtd"> <sqlMap> <typeAlias alias = "user" type = "com.pt.Users" /> <insert id="addUser" parameterClass="user"> insert into users values(#id#,#name#) </insert> </sqlMap>
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE sqlMapConfig PUBLIC "-//iBATIS.com//DTD SQL Map Config 2.0//EN" "http://www.ibatis.com/dtd/sql-map-config-2.dtd"> <sqlMapConfig> <sqlMap resource="com/pt/xml/Users.xml" /> </sqlMapConfig>
package com.pt; import java.io.IOException; import java.sql.Connection; import java.sql.Statement; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.sql.DataSource; import org.springframework.context.ApplicationContext; import org.springframework.web.context.ContextLoader; public class UserManager extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // TODO Auto-generated method stub doPost(req,resp); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // TODO Auto-generated method stub resp.setCharacterEncoding("GBK"); //获取spring上下文 ApplicationContext ctx = ContextLoader.getCurrentWebApplicationContext(); //注意，在这儿不可以自己new对象，必须由spring创建，这样ibatis才生效 Users user = (Users)ctx.getBean("user"); user.setId(20111907); user.setName("panteng"); user.add(user); resp.getWriter().write("测试成功"); } }
package com.pt; public interface DataObjManager { public boolean add(Object obj); public boolean deleteById(Object obj); public Object getById(Object obj); }
