{"id":1747,"date":"2010-07-05T22:37:05","date_gmt":"2010-07-05T14:37:05","guid":{"rendered":"\/?p=1747"},"modified":"2010-07-05T22:37:05","modified_gmt":"2010-07-05T14:37:05","slug":"1747","status":"publish","type":"post","link":"https:\/\/www.justzz.com\/spec\/1747.html","title":{"rendered":"c3p0\u8fde\u63a5\u6c60\u7528\u6cd5(\u65e0J2EE\u73af\u5883)"},"content":{"rendered":"<p><span style=\"font-family: \u5b8b\u4f53\"><strong>Jar\u5305\uff1a<\/strong><\/span><\/p>\n<p><span style=\"font-family: \u5b8b\u4f53\">\u4e0b\u8f7d\u5730\u5740\uff1ahttp:\/\/sourceforge.net\/projects\/c3p0\/files\/<br \/>\n\u6216\u5728Hibernate\u53d1\u5e03\u5305\u4e2d\uff0c\u6700\u65b0\u4e3ac3p0-0.9.2.jar<\/span><\/p>\n<p><span style=\"font-family: \u5b8b\u4f53\"><strong>\u793a\u4f8b\uff1a<\/strong><\/span><\/p>\n<pre><span style=\"color: #990033;font-family: \u5b8b\u4f53\">package c3p0;<\/span>\n\n<span style=\"color: #990033;font-family: \u5b8b\u4f53\">import java.sql.Connection;\nimport java.sql.SQLException;<\/span>\n\n<span style=\"color: #990033;font-family: \u5b8b\u4f53\">import com.mchange.v2.c3p0.ComboPooledDataSource;<\/span>\n\n<span style=\"color: #990033\">public class C3p0ConnPool {<\/span>\n\n<span style=\"color: #990033\">\u00a0\u00a0 private static ComboPooledDataSource cpDs;<\/span>\n\n<span style=\"color: #990033\">\u00a0\u00a0 static {\ncpDs = new ComboPooledDataSource();<\/span>\n\n<span style=\"color: #990033\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0try {\ncpDs.setDriverClass(\"com.microsoft.jdbc.sqlserver.SQLServerDriver\");<\/span>\n\n<span style=\"color: #990033\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0cpDs.setJdbcUrl(\"jdbc:microsoft:sqlserver:\/\/localhost:1433; DatabaseName=sample\");\ncpDs.setUser(\"sa\");\ncpDs.setPassword(\"123\");<\/span>\n\ncpDs.setMinPoolSize(10);\ncpDs.setMaxPoolSize(30);\n\n<span style=\"color: #990033\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0} catch (Exception e) {\ne.printStackTrace();\n}\n}<\/span>\n\n\u00a0\n\n<span style=\"color: #990033\">\u00a0\u00a0 public static Connection getConnection() {\nConnection conn = null;\ntry{\nconn = cpDs.getConnection();\n}catch(Exception e){\n}\nreturn conn;\n}<\/span>\n\n\u00a0\n\n<span style=\"color: #990033\">\u00a0\u00a0 public static void main(String[] args) {\nConnection conn = null;\ntry\n{\nconn = C3p0ConnPool.getConnection();<\/span>\n<span style=\"color: #0099cc\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ...\n\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 use the connection\n\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ...<\/span>\n\n<span style=\"font-family: \u5b8b\u4f53\">\u00a0 \u00a0} catch (Exception e) {<\/span>\n} finally {\nif (conn != null)\ntry {\nconn.close();\n} catch (SQLException e) {\ne.printStackTrace();\n}\n}\n\n<span style=\"color: #990033\">\u00a0 }<\/span>\n\n<span style=\"color: #990033\">}<\/span>\n<\/pre>\n<p><span style=\"font-family: \u5b8b\u4f53\"><strong>\u9644\uff1a[\u8f6c\u8f7d]c3p0\u8fde\u63a5\u6c60\u914d\u7f6e<\/strong><\/span><\/p>\n<p><span style=\"font-family: \u5b8b\u4f53\">\u6700\u8fd1\u8bd5\u7528\u4e86c3p0\u6570\u636e\u5e93\u8fde\u63a5\u6c60\uff0c\u914d\u7f6e\u65b9\u5f0f\u4f7f\u7528\u7684\u662fpropery\u6587\u4ef6\uff0c\u5c06c3p0.properties\u653e\u5728classpath\u76ee\u5f55\u4e0b\uff0c\u5982\u679c\u4e3aWEB\u5e94\u7528\uff0c\u653e\u5728WEB-INF\\classes\u4e0b<\/span><\/p>\n<pre><span style=\"color: #494949;font-family: \u5b8b\u4f53\">#\n# This file is detritus from various testing attempts\n# the values below may change, and often do not represent\n# reasonable values for the parameters.\n#<\/span>\n\n<span style=\"color: #494949;font-family: \u5b8b\u4f53\">c3p0.jdbcUrl=jdbc:oracle:thin:@127.0.0.1:1521:chenchi\nc3p0.driverClass=oracle.jdbc.driver.OracleDriver\nc3p0.user=hbota2\nc3p0.password=ty1234<\/span>\n\n<span style=\"color: #494949;font-family: \u5b8b\u4f53\">c3p0.minPoolSize=3\nc3p0.maxPoolSize=20<\/span>\n\n<span style=\"color: #494949;font-family: \u5b8b\u4f53\">#c3p0.testConnectionOnCheckout=true\n#c3p0.testConnectionOnCheckin=true<\/span>\n\n<span style=\"color: #494949;font-family: \u5b8b\u4f53\">#c3p0.checkoutTimeout=2000\n#c3p0.idleConnectionTestPeriod=5\n#c3p0.maxConnectionAge=10\n#c3p0.maxIdleTime=2\n#c3p0.maxIdleTimeExcessConnections=1\n#c3p0.propertyCycle=1\n#c3p0.numHelperThreads=10\n#c3p0.unreturnedConnectionTimeout=15\n#c3p0.debugUnreturnedConnectionStackTraces=true\n#c3p0.maxStatements=30\n#c3p0.maxStatementsPerConnection=5\n#c3p0.maxAdministrativeTaskTime=3\n#c3p0.preferredTestQuery=SELECT 1\n#c3p0.preferredTestQuery=SELECT a FROM emptyyukyuk WHERE a = 5\n#c3p0.preferredTestQuery=SELECT a FROM testpbds WHERE a = 5\n#c3p0.usesTraditionalReflectiveProxies=true\n#c3p0.automaticTestTable=PoopyTestTable\n#c3p0.acquireIncrement=4\n#c3p0.acquireRetryDelay=1000\n#c3p0.acquireRetryAttempts=60\n#c3p0.connectionTesterClassName=com.mchange.v2.c3p0.test.AlwaysFailConnectionTester\n#c3p0.initialPoolSize=10\ncom.mchange.v2.log.MLog=com.mchange.v2.log.log4j.Log4jMLog\n#com.mchange.v2.log.MLog=com.mchange.v2.log.jdk14logging.Jdk14MLog\n#com.mchange.v2.log.MLog=com.mchange.v2.log.FallbackMLog\ncom.mchange.v2.log.NameTransformer=com.mchange.v2.log.PackageNames\ncom.mchange.v2.log.FallbackMLog.DEFAULT_CUTOFF_LEVEL=ALL<\/span>\n\n<span style=\"color: #494949;font-family: \u5b8b\u4f53\">#com.mchange.v2.c3p0.VMID=poop<\/span>\n<\/pre>\n<p><span style=\"font-family: \u5b8b\u4f53\">\u5728java\u4ee3\u7801\u4e2d\u76f4\u63a5\u4f7f\u7528\u5373\u53ef<\/span><\/p>\n<pre><span style=\"color: #660099\">ComboPooledDataSource cpds = new ComboPooledDataSource();\nConnection conn = cpds.getConnection();<\/span>\n\/\/\u4e1a\u52a1\u4ee3\u7801\n<span style=\"color: #660099\">conn.close();<\/span>\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Jar\u5305\uff1a \u4e0b\u8f7d\u5730\u5740\uff1ahttp:\/\/sourceforge.net\/projects\/c3p0\/files\/ \u6216\u5728Hibernate\u53d1\u5e03\u5305\u4e2d\uff0c\u6700\u65b0\u4e3ac3p0-0.9.2.jar \u793a\u4f8b\uff1a package c3p0; import java.sql.Co&hellip;<\/p>\n","protected":false},"author":13,"featured_media":7704,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-1747","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-t"],"_links":{"self":[{"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/posts\/1747","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/comments?post=1747"}],"version-history":[{"count":0,"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/posts\/1747\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/media\/7704"}],"wp:attachment":[{"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/media?parent=1747"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/categories?post=1747"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.justzz.com\/spec\/wp-json\/wp\/v2\/tags?post=1747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}