Java 中的 Switch Case 语句是否有任何替代方案?任何好的设计模式?我的 Switch case 语句增加如何避免

问题描述：

在代码下面，我写了为每个条件执行 switch-case 语句.现在我正在考虑删除 switch-case 语句并应用一些设计模式来解决这个问题.//主要迭代 - 对于每张纸for (Entry>> entry : testCaseSheetsDataMap.entrySet()) {

Below Code, I wrote to execute the switch-case statement, for each condition. Now I am thinking to remove the switch-case statement and apply some design pattern to overcome this issue. // main iteration - for every sheet for (Entry>> entry : testCaseSheetsDataMap.entrySet()) {

            String sheetNameKey = entry.getKey().trim();
            String testCaseName = testCaseSheetMasterMap.get(sheetNameKey).trim();
            List<Map<String, Object>> executableRowsList = new ArrayList<Map<String, Object>>();
            executableRowsList = entry.getValue();

            CitiMainAuxiliary auxiliary = new CitiMainAuxiliary();

            switch (testCaseName) {

            case "Anonymous Mode Log In":
                auxiliary.runAllLogin(executableRowsList, testCaseName, Constants.ANONYMOUS);
                break;
            case "Login Mode":
                auxiliary.runAllLogin(executableRowsList, testCaseName, Constants.LOGIN);
                break;
            case "Cookied Mode Login":
                auxiliary.runAllLogin(executableRowsList, testCaseName, Constants.COOKIED);
                break;
            case "OBO Mode Login":
                auxiliary.runAllLogin(executableRowsList, testCaseName, Constants.OBO);
                break;

            case "Anonymous Mode Megamenu":
                auxiliary.runMegaMenu(executableRowsList, testCaseName, Constants.ANONYMOUS);
                break;
            case "Login Mode Megamenu":
                auxiliary.runMegaMenu(executableRowsList, testCaseName, Constants.LOGIN);
                break;
            case "Cookied Mode Logon - Megamenu Check":
                auxiliary.runMegaMenu(executableRowsList, testCaseName, Constants.COOKIED);
                break;
            case "OBO Logon - Megamenu Check":
                auxiliary.runMegaMenu(executableRowsList, testCaseName, Constants.OBO);
                break;

            }

        } // end-for testCaseSheetsDataMap

答

如前所述，您可以使用 polymorphism 和 Strategy 模式.

As was mention you can use polymorphism and Strategy pattern.

例如，您可以创建 Map>>策略并填充它

For example you can create Map<String, BiConsumer<CitiMainAuxiliary, List<Map<String, Object>>> strategies and populate it

strategies.put("Anonymous Mode Log In", (aux, list)-> aux.runAllLogin(list,...))

之后，您可以使用代替 switch 语句strategy = strategy.get(testCaseName);strategy.accept(...)

After that instead of switch statement you can use strategy = strategies.get(testCaseName); strategy.accept(...)

如果您不能使用 Java 8，您可以创建一个接口并使用 Map 而不是 BiConsumer 的映射.也许接口的实现更好，因为在每个特定的类中你都可以初始化你的常量，比如 COOKIED 或 OBO

If you can't use Java 8 you can create an Interface and use Map<String, YourInterface> instead of map of BiConsumer. Maybe the implementation with interfaces is better, because in every particular class you can initialize your Constants, like COOKIED or OBO

Java 中的 Switch Case 语句是否有任何替代方案?任何好的设计模式?我的 Switch case 语句增加如何避免

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