freeMarkerjia静态工具类

step 1 定义静态工具体类

package com.tianxia.sms.helper;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;


import javax.annotation.PostConstruct;


import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component

public class DictHelper {

private static final Logger logger = LoggerFactory.getLogger(DictHelper.class);

@Autowired
private SysDictService sysDictService;


private static final ConcurrentMap<String, List<SysDict>> dictMap = new ConcurrentHashMap<String, List<SysDict>>();

private static final ReadWriteLock lock = new ReentrantReadWriteLock();

public staticList<SysDict> getDictList(String dictType){
lock.readLock().lock(); 
try {
return dictMap.get(dictType);
}finally{
lock.readLock().unlock();
}
}

public static List<SysDict> getDictListExcludeKeys(String dictType, String... excludes){
lock.readLock().lock(); 
try {
List<SysDict> allDicts = dictMap.get(dictType);
List<SysDict> dicts = new ArrayList<SysDict>();
for(SysDict d : allDicts) {
boolean addFlag = true;
for(String ex : excludes) {
if(d.getDictKey().equals(ex)) {
addFlag = false;
break ;
}
}
if(addFlag) {
dicts.add(d);
}
}
return dicts;
}finally{
lock.readLock().unlock();
}
}

public static String getDictValue(String dictType, String dictKey){


if(StringUtils.isBlank(dictKey)) {
return null;
}


String dictValue = null;
List<SysDict> dictlist = getDictList(dictType);
for(SysDict dict:dictlist){
if(dictKey.equals(dict.getDictKey())){
dictValue = dict.getDictValue();
break;
}
}
return dictValue;
}

public static String getDictKey(String dictType, String dictValue){


if(StringUtils.isBlank(dictValue)) {
return null;
}


String dictKey = null;
List<SysDict> dictlist = getDictList(dictType);
for(SysDict dict:dictlist){
if(dictValue.equalsIgnoreCase(dict.getDictValue())){
dictKey = dict.getDictKey();
break;
}
}
return dictKey;
}

@PostConstruct
public void init(){
List<SysDict> list = sysDictService.getAllDict();
lock.writeLock().lock();
try {
dictMap.clear();
for(SysDict dict:list){
if(dictMap.containsKey(dict.getDictType())){
dictMap.get(dict.getDictType()).add(dict);
}else{
List<SysDict> dicts = new ArrayList<SysDict>();
dicts.add(dict);
dictMap.put(dict.getDictType(), dicts);
}
}
}finally{
lock.writeLock().unlock();
}
}

/**
* 
* 每隔30分钟，重新加载一次数据
*
* @author yangyulei
* @version
*/
@Scheduled(cron="0 0/30 * * * ?")
public void reload(){
logger.info("======================================reload dict data start================================");
this.init();
logger.info("======================================reload dict data end================================");
}

}

step 2 freeMarker util工具类

import org.springframework.ui.Model;


import freemarker.ext.beans.BeansWrapperBuilder;
import freemarker.template.Configuration;
import freemarker.template.TemplateHashModel;


/**
 * 
 * Title: Class BeansWrapperUtil.java
 * Description: 用于在 freemarker 模板中使用静态方法、常量、或枚举
 *
 * @author GuoYF
 * @version 0.0.1
 */
public class BeansWrapperUtil {


public static TemplateHashModel statics = new BeansWrapperBuilder(Configuration.VERSION_2_3_22).build().getStaticModels();


public static TemplateHashModel enums = new BeansWrapperBuilder(Configuration.VERSION_2_3_22).build().getEnumModels();


public static void enabledStatics(Model model) {
model.addAttribute("statics", statics);
}


public static void enabledEnums(Model model) {
model.addAttribute("enums", enums);
}

}

step 3 Action设置静态方法 freeMarker页面调用

@Controller
@RequestMapping("/admin")
public class ProductionOrderPlanController {

@RequestMapping("/toAdd")
public String toAdd(Model model){
BeansWrapperUtil.enabledStatics(model);//关键点
return "production/add";
}

｝

step 4 html freeMarker页面调用

add.html

<label class="control-label x105">优先级别：</label>
<select name="priorityLevel" class="required" data-toggle="selectpicker" data-rule="优先级别:required">
<#list statics["com.zhushang.cims.helper.DictHelper"].getDictList("ProductPlanLevel")as dict>
<option value ="${dict.dictKey}">${dict.dictValue}</option>
</#list>
     </select>