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>

web.xml

3、spring的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beansxmlns="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>

applicationContext.xml

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 {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {// TODO Auto-generated method stub
        doPost(req,resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {// TODO Auto-generated method stubresp.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");}}

UserManager.java

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 stubSystem.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
        }}

EncoderFilter.java

其他文件可以不用写！

二、ibatis数据源

<?xml version="1.0" encoding="UTF-8"?>
<beansxmlns="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>

applicationCnotext.xml

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 stubif(obj instanceof Users)getSqlMapClientTemplate().update("addUser", (Users)obj);elseSystem.out.println("输入类型错误！！！");return false;}public boolean deleteById(Object obj) {// TODO Auto-generated method stubreturn false;}public Object getById(Object obj) {// TODO Auto-generated method stubreturn 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;}}

Users,java

<?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>

Users.xml

<?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>

SqlMapConfig.xml

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 {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {// TODO Auto-generated method stub
        doPost(req,resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {// TODO Auto-generated method stubresp.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");}}

UserManager.java

package com.pt;public interface DataObjManager {public boolean add(Object obj);public boolean deleteById(Object obj);public Object getById(Object obj);
}

DataObjManager.java

转载于:https://www.cnblogs.com/tengpan-cn/p/5527195.html

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