Spring\u7684\u914d\u7f6e\u6587\u4ef6\u4e3aapplicationContext.xml\uff0c\u4f46\u662f\u6709\u4e9b\u5e38\u91cf\u53c2\u6570\u4e00\u822c\u4e0d\u914d\u7f6e\u5728applicationContext.xml\u4e2d\uff0c\u800c\u662f\u653e\u5728\u5355\u72ec\u7684properties\u6587\u4ef6\u4e2d\uff0c\u5982\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\u3002
applicationContext.xml\u914d\u7f6e\u5916\u90e8\u7684properties\u6587\u4ef6\u65f6\uff0c\u9700\u8981PropertyOverrideConfigurer\u5bf9\u8c61\uff0c\u6307\u5b9aproperties\u6587\u4ef6\u7684\u4f4d\u7f6e\uff0c\u7136\u540e\u6307\u5b9a\u5c5e\u6027\u3002<\/p>\n
<\/p>\n
\u4e0b\u9762\u662fmysql\u7684\u914d\u7f6e\u6587\u4ef6\uff0cjdbc.properties:<\/p>\n
\n#\u914d\u7f6e\u6570\u636e\u9a71\u52a8 \n jdbc.driverClassName=com.mysql.jdbc.Driver\n jdbc.url=jdbc:mysql:\/\/127.0.0.1:3306\/test?characterEncoding=UTF-8\n jdbc.username=root\n jdbc.password=toor \n<\/pre>\n\u4e0b\u9762\u662f\u5728applicationContext.xml\u4e2d\u914d\u7f6e\u8be5properties\u6587\u4ef6\uff1a<\/p>\n
\n <?xml version="1.0" encoding="UTF-8"?>\n <beans xmlns="http:\/\/www.springframework.org\/schema\/beans"\n xmlns:xsi="http:\/\/www.w3.org\/2001\/XMLSchema-instance" xmlns:p="http:\/\/www.springframework.org\/schema\/p"\n xmlns:context="http:\/\/www.springframework.org\/schema\/context"\n xmlns:aop="http:\/\/www.springframework.org\/schema\/aop"\n xsi:schemaLocation=" \n http:\/\/www.springframework.org\/schema\/beans \n http:\/\/www.springframework.org\/schema\/beans\/spring-beans-3.0.xsd \n http:\/\/www.springframework.org\/schema\/context \n http:\/\/www.springframework.org\/schema\/context\/spring-context-3.0.xsd \n http:\/\/www.springframework.org\/schema\/aop \n http:\/\/www.springframework.org\/schema\/aop\/spring-aop-3.0.xsd"\n default-autowire="byName">\n\n <!-- \u914d\u7f6e\u6570\u636e\u5e93\u4fe1\u606f\u6e90 -->\n <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">\n <property name="driverClassName" value="${jdbc.driverClassName}"><\/property>\n <property name="url" value="${jdbc.url}"><\/property>\n <property name="username" value="${jdbc.username}"><\/property>\n <property name="password" value="${jdbc.password}"><\/property>\n <\/bean>\n <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">\n <property name="location" value="classpath:jdbc.properties"><\/property>\n <\/bean>\n <\/beans> \n<\/pre>\n\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\uff0cPropertyConfigurer\u5bf9\u8c61\u4f1a\u5bfb\u627ejdbc.properties\u6587\u4ef6\u4e2d\uff0c\u5bfb\u627e\u76f8\u5e94\u7684\u53d8\u91cf\u3002
\u4e0b\u9762\u662f\u6d4b\u8bd5\u4ee3\u7801\uff0cSpringTest.java<\/p>\n\npackage com.yeetrack.mavenSpring;\n\n import java.sql.Connection;\n import java.sql.ResultSet;\n import java.sql.SQLException;\n import java.sql.Statement;\n\n import javax.sql.DataSource;\n\n import org.springframework.context.ApplicationContext;\n import org.springframework.context.support.ClassPathXmlApplicationContext;\n\n public class SpringTest\n {\n\n public static void main(String[] args)\n {\n \/\/\u83b7\u53d6ApplicationContext\u5bb9\u5668\n ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");\n \/\/\u901a\u8fc7Spring\u4ee3\u7406\u7c7bProxyFactoryBean\u83b7\u53d6ServiceImpl\u5b9e\u4f8b\n IService hello = (IService) context.getBean("service");\n hello.sayHello("Good Day!");\n DataSource data = (DataSource) context.getBean("dataSource");\n Connection conn = null;\n ResultSet result = null;\n try\n {\n conn = data.getConnection();\n Statement stat = conn.createStatement();\n String sql = "select * from user";\n result = stat.executeQuery(sql);\n while(result.next())\n {\n System.out.print(result.getString(1)+" ");\n System.out.print(result.getString(2)+" ");\n System.out.println(result.getString(3));\n\n }\n result.close();\n conn.close();\n } catch (SQLException e)\n {\n \/\/ TODO Auto-generated catch block\n e.printStackTrace();\n }\n }\n\n }\n<\/pre>\n","protected":false},"excerpt":{"rendered":"Spring\u7684\u914d\u7f6e\u6587\u4ef6\u4e3aapplicationContext.xml\uff0c\u4f46\u662f\u6709\u4e9b\u5e38\u91cf\u53c2\u6570\u4e00\u822c\u4e0d\u914d\u7f6e\u5728applicationContext.xml\u4e2d\uff0c\u800c\u662f\u653e\u5728\u5355\u72ec\u7684properties\u6587\u4ef6\u4e2d\uff0c\u5982\u6570\u636e\u5e93\u8fde\u63a5...<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[33],"tags":[8,7,5],"class_list":["post-11","post","type-post","status-publish","format-standard","hentry","category-coding","tag-java","tag-7","tag-5"],"views":3325,"_links":{"self":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/11","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11"}],"version-history":[{"count":1,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/11\/revisions"}],"predecessor-version":[{"id":187,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=\/wp\/v2\/posts\/11\/revisions\/187"}],"wp:attachment":[{"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yeetrack.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}