在開發(fā)中，經(jīng)常會用到很多的公用常量悦穿，頁面展示的是漢字攻礼，數(shù)據(jù)庫中存儲的是狀態(tài)碼，可以在查詢后用decode轉(zhuǎn)換栗柒，也可以頁面進行轉(zhuǎn)換礁扮，這里寫一個常量初始化后直接展示的思路方法

package com.lovo.beans;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 鍵值對方式處理公用常量對象
 * @author WZH
 *
 */
public class ContantsBean {
    
    /**
     * 常量名
     */
    private String key;
    
    /**
     * 常量值
     */
    private String value;
    
    /**
     * 常量類型
     */
    private String model;
    
    private List<ContantsBean> contants;
    
    
    //實際開發(fā)中在此不就加載在項目啟動中已經(jīng)加載到內(nèi)存或緩存中的值,此段后面的靜態(tài)塊和靜態(tài)常量不要
    //public  List<Map<String, List<ContantsBean>>> contantsList = ContantsInit(model);
    
    /**
     * 常量集合
     */
    public static List<Map<String, List<ContantsBean>>> contantsList;

    /**
     * 這里直接初始化一下，實際情況中為常量表中或配置中查詢出的值
     */
    static
    {
        contantsList = new ArrayList<>();
        ContantsBean c1 = new ContantsBean("01", "中文");
        ContantsBean c2 = new ContantsBean("02", "英文");
        ContantsBean c3 = new ContantsBean("03", "日文");
        List<ContantsBean> ListTemp1 = new ArrayList<>();
        ListTemp1.add(c1);
        ListTemp1.add(c2);
        ListTemp1.add(c3);
        Map<String, List<ContantsBean>> MapTemp1 = new HashMap<String, List<ContantsBean>>();
        MapTemp1.put("language", ListTemp1);
        
        ContantsBean c4 = new ContantsBean("01", "中國");
        ContantsBean c5 = new ContantsBean("02", "英國");
        ContantsBean c6 = new ContantsBean("03", "日本");
        List<ContantsBean> ListTemp2 = new ArrayList<>();
        ListTemp2.add(c4);
        ListTemp2.add(c5);
        ListTemp2.add(c6);
        
        Map<String, List<ContantsBean>> MapTemp2 = new HashMap<String, List<ContantsBean>>();
        MapTemp2.put("contry", ListTemp2);
        contantsList.add(MapTemp1);
        contantsList.add(MapTemp2);
    }
    
    public ContantsBean() {
        super();
    }

    
    
    public ContantsBean(String key, String value) {
        super();
        this.key = key;
        this.value = value;
    }


    /**
     * 通過常量類型 初始化對應常量集合
     * @param model
     */
    public ContantsBean(String model) {
        super();
        this.model = model;
        for (Map<String, List<ContantsBean>> temp : contantsList) 
        {
            if(null != temp.get(model))
            {
                this.contants = temp.get(model);
                break;
            }
            
        }
        
    }

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    /**
     * 通過鍵取值
     * @return
     */
    public String getValue() {
        for (ContantsBean bean : contants) 
        {
            if(this.key.equals(bean.getKey()))
            {
                return bean.getThisValue();
            }
        }
        
        return "";
    }

    /**
     * get方法已經(jīng)更改瞬沦，重新定義一個私有的獲取本類值的方法
     * @return
     */
    private String getThisValue() 
    {
        return value;
    }   
    public void setValue(String value) {
        this.value = value;
    }
    
/*  public static void main(String[] args) {
        ContantsBean test = new ContantsBean("language");
        test.setKey("01");
        System.out.println(test.getValue());
    }
    */
}

@RequestMapping("/contantsTest.do")
    public String ContantsTest(Model mode)
    {
        //這里模擬數(shù)據(jù)庫查詢出的數(shù)據(jù),語言字段存的為1
        ContantsBean test = new ContantsBean("language");
        test.setKey("01");
        mode.addAttribute("test", test);
        return "contantsTest";
        
    }

<div class="container" style="width: 100%" >
    ${test.value}
  </div>

image.png