【正文】 to access the data, as well as with its associated operating system, DBMS and the DBMS used to access the work platform. Although the ODBC Driver Manager the main purpose of the database are 山西大學(xué)本科畢業(yè)論文（設(shè)計(jì)）外文翻譯資料 loaded drive in order to ODBC function call, but the database itself drive the implementation of ODBC Functions Call, and with the database each other. Thus, when the calling application systems and data sources to connect, the database driver can manage munications protocol. When set up with Data source connectivity, databasedriven application system is able to handle the request sent to the DBMS of analysis or data source from the bottom of the design of the necessary translation, and The results back to the applications. 2. JDBC birth Since the Java language in May 1995 has been officially announced, Java swept the world. Emergence of many languages with java program, including the database should be Procedure. Because of absence of a Java language API, the programmer has to program in Java language ODBC add C function call. This makes Java a lot of outstanding Unable to give full play to the characteristics, such as platform independence, objectoriented characteristics. As more and more programmers to the Java language increasingly popular, more and more public Secretary for Program Development in Java on the increasing energy input on the java language interface to access the database of the API requirements bee stronger and stronger. Also because of the ODBC has its shortings The Department, such as it is not easy to use, there is no and so on, SUN One pany decided to develop Java language database interface application development interface. At JDK1. x version, JDBC is an optional ponent to , SQLtype package (that is, JDBCAPI) has bee the standard Java language, the Department of Pieces. Second, JDBC Technical Overview JDBC is a SQL statement can be used for the implementation of the JavaAPI (ApplicationProgrammingInterface, Application Programming Interface). It consists of a number of Writing Java language class, interface ponents. JDBC for database application developers, database developers Front Desk Tools provides a standard Application Programming Access The mouth, so that developers can use pure Java language to prepare a plete database application. Through the use of JDBC, developers can easily send SQL statements to virtually any kind of database. In other words, developers do not have to write a Program Access Sybase, write another program to visit Oracle, write a program to visit Microsoft39。而且，在許多情況下，三層模型可以提供更好的性能。這個(gè)網(wǎng)絡(luò)可是 intra，比如連接全體雇員的企業(yè)內(nèi)部網(wǎng)，當(dāng)然也可以是inter。這就需要能直接被訪問的數(shù)據(jù)庫進(jìn)行連接的 JDBC 驅(qū)動(dòng)器。這些API 事實(shí)上在很多方面上同 JDBC 一樣朝著相同的方向努力，也就是努力成為一個(gè)面向?qū)ο蟮?，基?ODBC 的類接口。 JDBC 保持了 ODBC 的基本設(shè)計(jì)特征。當(dāng)使用 ODBC 時(shí)，人們必須在每一臺(tái)客戶機(jī)上安裝 ODBC 驅(qū)動(dòng)器和驅(qū)動(dòng)管理器。因此，對(duì) Java 程序員來說，把 JDBC 設(shè)想成將 ODBC 轉(zhuǎn)換成面向?qū)ο蟮?API 是很自然的。那么，為什么需要 JDBC 呢？要回答這個(gè)問題，有這么幾個(gè)方面： 1） ODBC 并不適合在 Java 中直接使用。同時(shí)，程序員也正在開發(fā)對(duì)最終用戶來說訪問數(shù)據(jù)庫更加容易的應(yīng)用程序。程序員可以直接操作 Java 的對(duì)象；而存取所需要的 SQL 調(diào)用將在內(nèi)部直接產(chǎn)山西大學(xué)本科畢業(yè)論文（設(shè)計(jì)）外文翻譯資料 生。然后 SQL 的預(yù)處理器將把這種Java／ SQL 混用的程序翻譯成帶有 JDBCAPI 的 Java 程序。目前兩種基于 JDBC 的高層 API正處在開發(fā)階段。 JDBC 完全勝任這個(gè)任務(wù)，而且比其他數(shù)據(jù)庫互聯(lián)更加容易實(shí)現(xiàn)。程序員可以編寫或改寫一個(gè)程序，然后將它放在服務(wù)器上，而每個(gè)用戶都可以訪問服務(wù)器得到最新的 版本?；蛘咂髽I(yè)可以通過 JDBC 讓全部的職工（他們可以使用不同的操作系統(tǒng)，如 Windwos， Machintosh 和 UNIX）在 Intra 上連接到幾個(gè)全球數(shù)據(jù)庫上，而這幾個(gè)全球數(shù)據(jù)庫可以是不相同的。不但如此，使用 Java 編寫的應(yīng)用程序可以在任何支持 Java 的平臺(tái)上運(yùn)行，不必在不同的平臺(tái)上編寫不同的應(yīng)用。 JDBC 給數(shù)據(jù)庫應(yīng)用開發(fā)人員、數(shù)據(jù)庫前臺(tái)工具開發(fā)人員提供了一種標(biāo)準(zhǔn)的應(yīng)用程序設(shè)計(jì)接口，使開發(fā) 人員可以用純 Java 語言編寫完整的數(shù)據(jù)庫應(yīng)用程序。也由于 ODBC 的有其不足之處，比如它并不容易使用，沒有面 向?qū)ο蟮奶匦缘鹊龋?SUN 公司決定開發(fā)一 Java 語言為接口的數(shù)據(jù)庫應(yīng)用程序開發(fā)接口。出現(xiàn)大量的用 java 語言編寫的程序，其中也包括數(shù)據(jù)庫應(yīng)用程序。 雖然 ODBC 驅(qū)動(dòng)器管理器的主要目的是加載數(shù)據(jù)庫驅(qū)動(dòng)器，以便 ODBC 函數(shù)調(diào)用，但是數(shù)據(jù)庫驅(qū)動(dòng)器本身也執(zhí)行 ODBC 函數(shù)調(diào)用，并與數(shù)據(jù)庫相互配合。 驅(qū)動(dòng)器管理器：為應(yīng)用程序裝載數(shù)據(jù)庫驅(qū)動(dòng)器。它是一種用來在相關(guān)或不相關(guān)的數(shù)據(jù)庫管理系統(tǒng)（ DBMS）中存取數(shù)據(jù)的，用 C 語言實(shí)現(xiàn)的，標(biāo)