SqlBuilderSQL生成类库
SqlBuilder 是一个Java的类库,它试图帮你避免在Java程序内直接书写SQL查询的痛苦。你只需要使用 SqlBuilder 的方法,它就可以帮你生成对应的 SQL 数据库查询语句,例如下面一个SQL语句:
String selectQuery = "SELECT " + T1_COL1 + "," + T1_COL2 + "," +
T2_COL1 + " FROM " + TABLE1 + " " + T1 + " INNER JOIN " +
TABLE2 + " " + T2 + " ON (" + T1_IDCOL + " = " + T2_IDCOL +
") ORDER BY " + T1_COL1;
对应的 SqlBuilder 的代码是:
// assuming these objects have already been created
Table table1, table2;
Column t1Col1, t1Col2, t2Col1;
Join joinOfT1AndT2;
String selectQuery =
(new SelectQuery())
.addColumns(t1Col1, t1Col2, t2Col1)
.addJoin(SelectQuery.JoinType.INNER_JOIN, joinOfT1AndT2)
.addOrderings(t1Col1)
.validate().toString();
更多的示例代码请看这里。
编者:这样的做法使得程序难以阅读,不直观。
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