"SELECT FROM * TABLE;INSERT INTO TABLE;"

String url = "jdbc:mysql://localhost:3306/";
    String dbName = "databaseinjection";
    String driver = "com.mysql.jdbc.Driver";
    String sqlUsername = "root";
    String sqlPassword = "abc";

    Class.forName(driver).newInstance();

    connection = DriverManager.getConnection(url+dbName, sqlUsername, sqlPassword);

"SELECT FROM * TABLE;INSERT INTO TABLE;"

String dbUrl = "jdbc:mysql:///test?allowMultiQueries=true";

boolean hasMoreResultSets = stmt.execute( multiQuerySqlString );

READING_QUERY_RESULTS: // label
    while ( hasMoreResultSets || stmt.getUpdateCount() != -1 ) {
        if ( hasMoreResultSets ) {
            Resultset rs = stmt.getResultSet();
            // handle your rs here
        } // if has rs
        else { // if ddl/dml/...
            int queryResult = stmt.getUpdateCount();
            if ( queryResult == -1 ) { // no more queries processed
                break READING_QUERY_RESULTS;
            } // no more queries processed
            // handle success, failure, generated keys, etc here
        } // if ddl/dml/...

        // check to continue in the loop
        hasMoreResultSets = stmt.getMoreResults();
    } // while results

CallableStatement cstmt = con.prepareCall( "call multi_query()" );
boolean hasMoreResultSets = cstmt.execute();
READING_QUERY_RESULTS:
    while ( hasMoreResultSets ) {
        Resultset rs = stmt.getResultSet();
        // handle your rs here
    } // while has more rs

Statement s = c.createStatement();
String s1 = "update emp set name='abc' where salary=984";
String s2 = "insert into emp values ('Osama',1420)";
s.addBatch(s1);
s.addBatch(s2);
s.executeBatch();

&

url="jdbc:mysql://localhost/glyndwr?autoReconnect=true&allowMultiQueries=true"