JSF 1.2-PostConstruct是否在吸气剂之前或之后执行 [英] JSF 1.2 - Does PostConstruct execute before or after getters

问题描述

我有一个支持bean的代码:

I have this code for a backing bean:

@PostConstruct
 public void refreshData()
 {
  rows  = (int) dd.getRows();
  pages = dd.getPages();
  getRender();
 }

// action
 public void getCount(String sql, Object... values)
  throws Exception
 {
  dd.getCount(sql, values);
  rows  = (int) dd.getRows();
  pages = dd.getPages();
 }

 // getter methods
    public boolean getRender() {
        System.out.println("pages: "+pages);
     boolean rendered = pages > 0? true: false;
     return rendered;
    } 

 public int getRows() {
  return rows;
 }
    public int getPages() {       
     return pages;
    }

带有 @PostConstruct 指令的 refreshData()方法是否在所有getter方法之后或之前执行?我之所以这样问，是因为我注意到 getRender()方法始终返回零，即使 getPages()返回例如10的数字.

Does the refreshData() method with the @PostConstruct directive get executed after or before all the getter methods? I ask this because I notice the getRender() method always return zero even though the getPages() returns a number like 10 for example.

推荐答案

我不知道您所说的在所有getter方法之前"是什么意思.至少在构造 Bean和设置所有托管属性(在faces-config.xml中定义的Bean属性)之后立即调用@PostConstruct.

I have no idea what you mean with "before all the getter methods". At least the @PostConstruct is called immediately after the construction of the bean and the setting of all managed properties (the bean properties which are definied in faces-config.xml).

因此大致来说:

1. Bean被构造.
2. 已设置托管属性.
3. @PostConstruct被调用.
4. Bean进入了JSF生命周期.

您的问题很可能是其他值覆盖了该值.只需运行调试器或让专家检查您的代码即可.

Your problem is likely that the value is been overriden by something else. Just run the debugger or have your code reviewed by an expert.

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