这是我测试JDBC连接的代码
package com.sybase;
public class SybaseDBConnection {
public static Properties prop = null;
public static Connection getConnection(String databaseType) {
Connection conn = null;
// Properties prop = null;
String database = null;
String driver = null;
String url = null;
String user = null;
String password = null;
try {
// prop = new Properties();
// prop.load(SybaseDBConnection.class.getClassLoader()
// .getResourceAsStream("com/properties/sybase.properties"));
database = prop.getProperty("sybase." + databaseType
+ ".databaseName");
driver = prop.getProperty("sybase." + databaseType
+ ".driverClassName");
url = prop.getProperty("sybase." + databaseType + ".url");
user = prop.getProperty("sybase." + databaseType + ".username");
password = prop.getProperty("sybase." + databaseType + ".password");
// String dbConUrl =
// "jdbc:datadirect:sqlserver://nt64sl2003a.americas.progress.comsql2008;Port=1433;DatabaseName=test;User=test;Password=test;EnableBulkLoad=true;BulkLoadBatchSize="
// + JDBC_BATCH_SIZE;
String dbConUrl = url + SEMI_COLLAN + "DatabaseName=" + database
+ SEMI_COLLAN + "User=" + user + SEMI_COLLAN + "Password="
+ password + SEMI_COLLAN + "EnableBulkLoad=true"
+ SEMI_COLLAN + "BulkLoadBatchSize=" + JDBC_BATCH_SIZE;
System.out.println("The URL is : " + dbConUrl);
SybDriver sybDriver = (SybDriver) Class.forName(driver)
.newInstance();
sybDriver.setVersion(com.sybase.jdbcx.SybDriver.VERSION_6);
DriverManager.registerDriver(sybDriver);
conn = DriverManager.getConnection(dbConUrl);
} catch (SQLException e) {
System.err.println("Exception occured : SQLException : "
+ e.getMessage());
e.printStackTrace();
} catch (InstantiationException e) {
System.err.println("Exception occured : InstantiationException : "
+ e.getMessage());
e.printStackTrace();
} catch (IllegalAccessException e) {
System.err.println("Exception occured : IllegalAccessException : "
+ e.getMessage());
e.printStackTrace();
} catch (ClassNotFoundException e) {
System.err.println("Exception occured : ClassNotFoundException : "
+ e.getMessage());
e.printStackTrace();
}
return conn;
}
public static void closeConnection(Connection conn) {
try {
if (null != conn) {
conn.close();
conn = null;
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void closeResultset(ResultSet rs) {
try {
if (null != rs) {
rs.close();
rs = null;
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void closePreparedStatement(PreparedStatement pstmt) {
try {
if (null != pstmt) {
pstmt.close();
pstmt = null;
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public static void closeStatement(Statement stmt) {
try {
if (null != stmt) {
stmt.close();
stmt = null;
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public static String getProperty(String property) {
return prop.getProperty(property);
}
public static void main(String args[]) {
SybaseDBConnection.getConnection("ase");
}
}
我写了这个测试用例
public class SybaseStatementTest {
Connection conn;
Statement stmt;
// Setup methods
@BeforeClass
public void beforeClass() {
conn = null;
stmt = null;
}
// clean up method
@AfterClass
public void releaseResource() {
if (stmt != null) {
SybaseDBConnection.closeStatement(stmt);
}
if (conn != null) {
SybaseDBConnection.closeConnection(conn);
}
}
// Test case to check close statement using ASE database
@Before
public void openConnBeforerStmtTestASE() throws SQLException {
conn = SybaseDBConnection.getConnection("ase");
stmt = conn.createStatement();
}
@After
public void closeConnAfterStmtTestASE() {
if (conn != null) {
SybaseDBConnection.closeConnection(conn);
}
}
@Test
public void testCloseStatementASE() {
SybaseDBConnection.closeStatement(stmt);
Assert.assertNull("Error occured", stmt);
}
}
运行此Junit测试用例时,我收到初始化错误(@BeforeClass应该是静态的)。 请帮忙吗?
答案 0 :(得分:4)
@BeforeClass
和@AfterClass
在类级别而不是在实例上运行,因此方法必须是静态的。
您可以删除beforeClass
方法。它没有做任何有用的事情,因为实例变量无论如何都将默认为null。并将@AfterClass
更改为@After
。
测试本身不起作用,因为SybaseDBConnection.closeStatement
将stmt
设置为null,但这在方法之外是不可见的,因为它是一个局部变量。
您可以像以下一样编写测试:
public class SybaseStatementTest {
Connection connection;
@Before
public void before() {
connection = SybaseDBConnection.getConnection("ase");
}
@After
public void after() {
SybaseDBConnection.closeConnection(connection);
}
@Test
public void closeStatementShouldCloseStatement() {
Statement statement = connection.createStatement();
SybaseDBConnection.closeStatement(statement);
assertTrue(statement.isClosed());
}
@Test
public void closeStatementWithNullShouldNotThrow() {
SybaseDBConnection.closeStatement(null);
}
}