JFinal之控制器詳解getBean和getModel(7)

getBean和getModel的區別:
getBean只是一個javaBean,getModel是一個和數據庫映射的Java Model.
getBean依賴set和get方法,getModel基於put和get.

getBean()的使用
html代碼:

<form action="/">
    <input name="article.title" type="text">
    <input name="article.content" type="text">
    <input name="article.remark" type="text">
</form>

如果這邊不用article.xxxx,使用其他的一個別名,假如使用ar1.xxx,這邊getBean的時候可以使用:

Article article = getBean(Article.class,"ar1");

實體model:

public class Article {

    private String title;

    private String content;

    private String remark;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public String getRemark() {
        return remark;
    }

    public void setRemark(String remark) {
        this.remark = remark;
    }

    @Override
    public String toString() {
        return "Article{" +
                "title='" + title + '\'' +
                ", content='" + content + '\'' +
                ", remark='" + remark + '\'' +
                '}';
    }
}

action:

 Article article = getBean(Article.class);

getBean源碼解析:

public class Injector {
    public static final <T> T injectBean(Class<T> beanClass, String beanName, HttpServletRequest request, boolean skipConvertError) {
        Object bean = createInstance(beanClass);
        //看beanName是不是空的,不是空的就將beanName. 作爲前綴.
        String modelNameAndDot = StrKit.notBlank(beanName) ? beanName + "." : null;
        TypeConverter converter = TypeConverter.me();
        //獲取request提交的所有數據
        Map<String, String[]> parasMap = request.getParameterMap();
        Method[] methods = beanClass.getMethods();
        Method[] var9 = methods;
        int var10 = methods.length;

        for(int var11 = 0; var11 < var10; ++var11) {
            Method method = var9[var11];
            String methodName = method.getName();
            //看是否已set開頭,長度不能小於3
            if (methodName.startsWith("set") && methodName.length() > 3) {
                Class<?>[] types = method.getParameterTypes();
                if (types.length == 1) {
                	//去掉錢三個字母,並把首位變成小寫
                    String attrName = StrKit.firstCharToLowerCase(methodName.substring(3));
                    String paraName = modelNameAndDot != null ? modelNameAndDot + attrName : attrName;
                    if (parasMap.containsKey(paraName)) {
                        try {
                            String paraValue = request.getParameter(paraName);
                            Object value = paraValue != null ? converter.convert(types[0], paraValue) : null;
                            method.invoke(bean, value);
                        } catch (Exception var19) {
                            if (!skipConvertError) {
                                throw new RuntimeException(var19);
                            }
                        }
                    }
                }
            }
        }

        return bean;
    }
}