(1. For the reading operation of data table, he can convert the results into Java collections such as ListArraySet, which is convenient for programmers to operate; 2. It is also easy to write data tables (just write SQL statements) 3. You can use data sources to optimize functions by using JNDI database connection pool and other technologies. Reuse the built database connection objects instead of the time-consuming and laborious repeated construction and deconstruction of such objects as phpasp. DBUtils include three packages: orgapache commonsdbutilsorgapache commonsdbutilshandlersororgapache commonsdbutilswrappersDBUtils encapsulates JDBC operations, simplifies JDBC operations, and can write fewer codes. orgapache commonsdbutil SDbUtils Operations such as closing the connection)
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