SqlBuilder - SQL生成类库


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跨平台
Java

软件简介

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。