老铁们要引以为戒啊
package com.itranswarp.learnjava; import java.util.StringJoiner; public class Main { public static void main(String[] args) { String[] fields = { "name", "position", "salary" }; String table = "employee"; String select = buildSelectSql(table, fields); System.out.println(select); System.out.println("SELECT name, position, salary FROM employee".equals(select) ? "测试成功" : "测试失败"); } static String buildSelectSql(String table, String[] fields) { var c = new StringJoiner(", ", "SELECT ", " FROM "); for (String field:fields) { c.add(field); } return (c+table).toString(); } }
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_我是来微博看美女的
老铁们要引以为戒啊