import java.sql.Connection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;public class DbConn { private static final String JNDI_NAME = "weblogic连接池的JNDI";
private static Map dataSourceMap;
static {
dataSourceMap = Collections.synchronizedMap(new HashMap());
}
public static Connection getConnection() {
try {
DataSource dataSource = (DataSource) dataSourceMap.get(JNDI_NAME);
if (null != dataSource) {
return dataSource.getConnection();
}
Context context = new InitialContext();
if (context == null) {
System.out.println("Context is null");
}
dataSource = (DataSource) context.lookup(JNDI_NAME);
dataSourceMap.put(JNDI_NAME, dataSource);
return dataSource.getConnection();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;public class DbConn { private static final String JNDI_NAME = "weblogic连接池的JNDI";
private static Map dataSourceMap;
static {
dataSourceMap = Collections.synchronizedMap(new HashMap());
}
public static Connection getConnection() {
try {
DataSource dataSource = (DataSource) dataSourceMap.get(JNDI_NAME);
if (null != dataSource) {
return dataSource.getConnection();
}
Context context = new InitialContext();
if (context == null) {
System.out.println("Context is null");
}
dataSource = (DataSource) context.lookup(JNDI_NAME);
dataSourceMap.put(JNDI_NAME, dataSource);
return dataSource.getConnection();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;public class DbConn { private static final String JNDI_NAME = "weblogic连接池的JNDI";
private static Map dataSourceMap;
static {
dataSourceMap = new java.util.concurrent.ConcurrentHashMap();
}
public static Connection getConnection() {
try {
DataSource dataSource = (DataSource) dataSourceMap.get(JNDI_NAME);
if(dataSource == null) {
synchronized(dataSourceMap) {
dataSource = (DataSource) dataSourceMap.get(JNDI_NAME);
if(dataSource == null) {
Context context = new InitialContext();
if (context == null) {
System.out.println("Context is null");
}
dataSource = (DataSource) context.lookup(JNDI_NAME);
dataSourceMap.put(JNDI_NAME, dataSource);
}
}
}
return dataSource.getConnection();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}