Spring使用XML解析引入外部的属性配置文件-----Spring框架

「爱情、让人受尽委屈。」 2024-03-23 18:43 14阅读 0赞

>     <?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: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">
>         <context:property-placeholder location="jdbc.properties"/>
>         <bean id="myDataSource" class="com.powernode.spring6.jdbc.MyDataSource">
>     
>     
>             <property name="driver" value="${jdbc.Driver}"></property>
>             <property name="url" value="${jdbc.url}"></property>
>     
>             <property name="username" value="${jdbc.username}"></property>
>             <property name="password" value="${jdbc.password}"></property>
>         </bean>
>     </beans>
> 
> <?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: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">  
> <context:property-placeholder location="jdbc.properties"/>  
> <bean id="myDataSource" class="com.powernode.spring6.jdbc.MyDataSource">  
>   
>   
> <property name="driver" value="$\{jdbc.Driver\}"></property>  
> <property name="url" value="$\{jdbc.url\}"></property>  
>   
> <property name="username" value="$\{jdbc.username\}"></property>  
> <property name="password" value="$\{jdbc.password\}"></property>  
> </bean>  
> </beans>

>     jdbc.Driver=com.mysql.cj.jdbc.Driver
>     jdbc.url=jdbc:mysql://localhost:13306/spring6
>     jdbc.username=root
>     jdbc.password=abc123
> 
> jdbc.Driver=com.mysql.cj.jdbc.Driver  
> jdbc.url=jdbc:mysql://localhost:13306/spring6  
> jdbc.username=root  
> jdbc.password=abc123

>     package com.powernode.spring6.jdbc;
>     
>     import javax.sql.DataSource;
>     import java.io.PrintWriter;
>     import java.sql.Connection;
>     import java.sql.SQLException;
>     import java.sql.SQLFeatureNotSupportedException;
>     import java.util.logging.Logger;
>     
>     public class MyDataSource implements DataSource
>     {
>         private String Driver;
>         private String url;
>         private String username;
>         private String password;
>     
>         @Override
>         public String toString() {
>             return "MyDataSource{" +
>                     "Driver='" + Driver + '\'' +
>                     ", url='" + url + '\'' +
>                     ", username='" + username + '\'' +
>                     ", password='" + password + '\'' +
>                     '}';
>         }
>     
>         public void setDriver(String driver) {
>             Driver = driver;
>         }
>     
>         public void setUrl(String url) {
>             this.url = url;
>         }
>     
>         public void setUsername(String username) {
>             this.username = username;
>         }
>     
>         public void setPassword(String password) {
>             this.password = password;
>         }
>     
>         @Override
>         public Connection getConnection() throws SQLException {
>             return null;
>         }
>     
>         @Override
>         public Connection getConnection(String username, String password) throws SQLException {
>             return null;
>         }
>     
>         @Override
>         public PrintWriter getLogWriter() throws SQLException {
>             return null;
>         }
>     
>         @Override
>         public void setLogWriter(PrintWriter out) throws SQLException {
>     
>         }
>     
>         @Override
>         public void setLoginTimeout(int seconds) throws SQLException {
>     
>         }
>     
>         @Override
>         public int getLoginTimeout() throws SQLException {
>             return 0;
>         }
>     
>         @Override
>         public Logger getParentLogger() throws SQLFeatureNotSupportedException {
>             return null;
>         }
>     
>         @Override
>         public <T> T unwrap(Class<T> iface) throws SQLException {
>             return null;
>         }
>     
>         @Override
>         public boolean isWrapperFor(Class<?> iface) throws SQLException {
>             return false;
>         }
>     }
> 
> package com.powernode.spring6.jdbc;  
>   
> import javax.sql.DataSource;  
> import java.io.PrintWriter;  
> import java.sql.Connection;  
> import java.sql.SQLException;  
> import java.sql.SQLFeatureNotSupportedException;  
> import java.util.logging.Logger;  
>   
> public class MyDataSource implements DataSource  
> \{  
> private String Driver;  
> private String url;  
> private String username;  
> private String password;  
>   
> @Override  
> public String toString() \{  
> return "MyDataSource\{" +  
> "Driver='" + Driver + '\\'' +  
> ", url='" + url + '\\'' +  
> ", username='" + username + '\\'' +  
> ", password='" + password + '\\'' +  
> '\}';  
> \}  
>   
> public void setDriver(String driver) \{  
> Driver = driver;  
> \}  
>   
> public void setUrl(String url) \{  
> this.url = url;  
> \}  
>   
> public void setUsername(String username) \{  
> this.username = username;  
> \}  
>   
> public void setPassword(String password) \{  
> this.password = password;  
> \}  
>   
> @Override  
> public Connection getConnection() throws SQLException \{  
> return null;  
> \}  
>   
> @Override  
> public Connection getConnection(String username, String password) throws SQLException \{  
> return null;  
> \}  
>   
> @Override  
> public PrintWriter getLogWriter() throws SQLException \{  
> return null;  
> \}  
>   
> @Override  
> public void setLogWriter(PrintWriter out) throws SQLException \{  
>   
> \}  
>   
> @Override  
> public void setLoginTimeout(int seconds) throws SQLException \{  
>   
> \}  
>   
> @Override  
> public int getLoginTimeout() throws SQLException \{  
> return 0;  
> \}  
>   
> @Override  
> public Logger getParentLogger() throws SQLFeatureNotSupportedException \{  
> return null;  
> \}  
>   
> @Override  
> public <T> T unwrap(Class<T> iface) throws SQLException \{  
> return null;  
> \}  
>   
> @Override  
> public boolean isWrapperFor(Class<?> iface) throws SQLException \{  
> return false;  
> \}  
> \}

>     @Test
>         public void TestProperties()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("Spring-properties.xml");
>             MyDataSource MyDataSource = applicationContext.getBean("myDataSource", MyDataSource.class);
>             System.out.println(MyDataSource);
>         }
> 
> @Test  
> public void TestProperties()  
> \{  
> ApplicationContext applicationContext = new ClassPathXmlApplicationContext("Spring-properties.xml");  
> MyDataSource MyDataSource = applicationContext.getBean("myDataSource", MyDataSource.class);  
> System.out.println(MyDataSource);  
> \}