基于ssh之优化具体参数值

方法一: 通过spring注入

xml: 中可以有多个key1,key2,key3...,根据需要

<bean id="app1Action" class="org.ssh_manage.action.App1Action"
        scope="prototype" p:service-ref="service" p:key1="teacherDao" p:key2="studentDao">
    </bean>

action父类:

  private String key1;
    private String key2;
  get/set(...)

action类:

List<Teacher> teachers = getService().getAll(getKey1);

以上相当于写了:

List<Teacher> teachers = getService().getAll("teacherDao");

方法二: 通过静态final定义常量

action父类:

public static final String TEACHER = "teacherDao";
public static final String STUDENT = "studentDao";

action子类:

List<Teacher> teachers = getService().getAll(STUDENT);