首页BaseDirective自定义指令基类,编写自定义指令时需要集成此类
package com.sanluan.common.base;
import java.io.IOException;
import java.util.Map;
import com.sanluan.common.handler.DirectiveHandler;
import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;
public abstract class BaseDirective implements TemplateDirectiveModel {
@SuppressWarnings("unchecked")
@Override
public void execute(Environment environment, @SuppressWarnings("rawtypes") Map parameters, TemplateModel[] loopVars,
TemplateDirectiveBody templateDirectiveBody) throws TemplateException, IOException {
execute(new DirectiveHandler(environment, parameters,loopVars, templateDirectiveBody));
}
public abstract void execute(DirectiveHandler handler) throws TemplateException, IOException;
}DirectiveHandler操作封装类,这个类主要封装了指令参数的获取，数据模型的填充与回收，简化指令逻辑操作
package com.sanluan.common.handler;
import java.io.IOException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.lang3.StringUtils;
import freemarker.core.Environment;
import freemarker.template.TemplateBooleanModel;
import freemarker.template.TemplateDateModel;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateException;
import freemarker.template.TemplateHashModel;
import freemarker.template.TemplateHashModelEx;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
import freemarker.template.TemplateNumberModel;
import freemarker.template.TemplateScalarModel;
public class DirectiveHandler {
public static final DateFormat FULL_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static final int FULL_DATE_LENGTH = 19;
public static final DateFormat SHORT_DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd");
public static final int SHORT_DATE_LENGTH = 10;
private Environment environment;
private Map<String, TemplateModel> parameters;
private TemplateModel[] loopVars;
private TemplateDirectiveBody templateDirectiveBody;
private Map<String, Object> map = new HashMap<String, Object>();
/**
* @param environment
* @param parameters
* @param templateDirectiveBody
*/
public DirectiveHandler(Environment environment, Map<String, TemplateModel> parameters, TemplateModel[] loopVars,
TemplateDirectiveBody templateDirectiveBody) {
this.environment = environment;
this.loopVars = loopVars;
this.parameters = parameters;
this.templateDirectiveBody = templateDirectiveBody;
}
/**
* 渲染
*
* @param templateDirectiveBody
* @throws IOException
* @throws TemplateException
*/
public void render() throws IOException, TemplateException {
Map<String, TemplateModel> reduceMap = reduce();
if (null != templateDirectiveBody)
templateDirectiveBody.render(environment.getOut());
reduce(reduceMap);
}
/**
* 控制变量不为空时，导出所有变量
*
* @param map
* @param notEmptyObject
* @throws IOException
* @throws TemplateException
*/
public void renderIfNotNull(Object notEmptyObject) throws IOException, TemplateException {
if (null != notEmptyObject) {
render();
}
}
/**
* 打印变量
*
* @param str
* @throws IOException
* @throws TemplateException
*/
public void print(String str) throws IOException, TemplateException {
environment.getOut().append(str);
}
/**
* @param key
* @param value
* @return
*/
public DirectiveHandler put(String key, Object value) {
map.put(key, value);
return this;
}
/**
* @return
* @throws TemplateModelException
*/
private Map<String, TemplateModel> reduce() throws TemplateModelException {
Map<String, TemplateModel> reduceMap = new HashMap<String, TemplateModel>();
for (String key : map.keySet()) {
TemplateModel value = environment.getVariable(key);
if (null != value)
reduceMap.put(key, environment.getVariable(key));
environment.setVariable(key, environment.getObjectWrapper().wrap(map.get(key)));
}
return reduceMap;
}
/**
* @param map
* @throws TemplateModelException
*/
private void reduce(Map<String, TemplateModel> map) throws TemplateModelException {
for (String key : map.keySet()) {
environment.setVariable(key, map.get(key));
}
}
/**
* @param name
* @return
* @throws TemplateModelException
*/
public TemplateHashModel getMap(String name) throws TemplateModelException {
TemplateModel model = parameters.get(name);
if (null == model) {
return null;
}
if (model instanceof TemplateHashModelEx) {
return (TemplateHashModelEx) model;
} else if (model instanceof TemplateHashModel) {
return (TemplateHashModel) model;
} else {
return null;
}
}
/**
* @param name
* @param defaultValue
* @return
* @throws TemplateException
*/
public String getString(String name, String defaultValue) throws TemplateException {
String result = getString(name);
if (null == result)
return defaultValue;
else
return result;
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public String getString(String name) throws TemplateException {
TemplateModel model = parameters.get(name);
if (null == model) {
return null;
}
if (model instanceof TemplateScalarModel) {
return ((TemplateScalarModel) model).getAsString();
} else if ((model instanceof TemplateNumberModel)) {
return ((TemplateNumberModel) model).getAsNumber().toString();
} else {
return null;
}
}
/**
* @param name
* @param defaultValue
* @return
* @throws TemplateException
*/
public Integer getInteger(String name, int defaultValue) throws TemplateException {
Integer result = getInteger(name);
if (null == result)
return defaultValue;
else
return result;
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public Integer getInteger(String name) throws TemplateException {
TemplateModel model = parameters.get(name);
if (null == model) {
return null;
}
if (model instanceof TemplateNumberModel) {
return ((TemplateNumberModel) model).getAsNumber().intValue();
} else if (model instanceof TemplateScalarModel) {
String s = ((TemplateScalarModel) model).getAsString();
if (StringUtils.isBlank(s)) {
return null;
}
try {
return Integer.parseInt(s);
} catch (NumberFormatException e) {
return null;
}
} else {
return null;
}
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public Short getShort(String name) throws TemplateException {
TemplateModel model = parameters.get(name);
if (null == model) {
return null;
}
if (model instanceof TemplateNumberModel) {
return ((TemplateNumberModel) model).getAsNumber().shortValue();
} else if (model instanceof TemplateScalarModel) {
String s = ((TemplateScalarModel) model).getAsString();
if (StringUtils.isBlank(s)) {
return null;
}
try {
return Short.parseShort(s);
} catch (NumberFormatException e) {
return null;
}
} else {
return null;
}
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public Long getLong(String name) throws TemplateException {
TemplateModel model = parameters.get(name);
if (null == model) {
return null;
}
if (model instanceof TemplateNumberModel) {
return ((TemplateNumberModel) model).getAsNumber().longValue();
} else if (model instanceof TemplateScalarModel) {
String s = ((TemplateScalarModel) model).getAsString();
if (StringUtils.isBlank(s)) {
return null;
}
try {
return Long.parseLong(s);
} catch (NumberFormatException e) {
return null;
}
} else {
return null;
}
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public Double getDouble(String name) throws TemplateException {
TemplateModel model = parameters.get(name);
if (null == model) {
return null;
}
if (model instanceof TemplateNumberModel) {
return ((TemplateNumberModel) model).getAsNumber().doubleValue();
} else if (model instanceof TemplateScalarModel) {
String s = ((TemplateScalarModel) model).getAsString();
if (StringUtils.isBlank(s)) {
return null;
}
try {
return Double.parseDouble(s);
} catch (NumberFormatException e) {
return null;
}
} else {
return null;
}
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public Integer[] getIntegerArray(String name) throws TemplateException {
String[] arr = getStringArray(name);
if (null != arr) {
Integer[] ids = new Integer[arr.length];
int i = 0;
try {
for (String s : arr) {
ids[i++] = Integer.valueOf(s);
}
return ids;
} catch (NumberFormatException e) {
return null;
}
} else
return null;
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public Long[] getLongArray(String name) throws TemplateException {
String[] arr = getStringArray(name);
if (null != arr) {
Long[] ids = new Long[arr.length];
int i = 0;
try {
for (String s : arr) {
ids[i++] = Long.valueOf(s);
}
return ids;
} catch (NumberFormatException e) {
return null;
}
} else
return null;
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public String[] getStringArray(String name) throws TemplateException {
String str = getString(name);
if (StringUtils.isBlank(str)) {
return null;
}
return StringUtils.split(str, ',');
}
/**
* @param name
* @param defaultValue
* @return
* @throws TemplateException
*/
public Boolean getBoolean(String name, Boolean defaultValue) throws TemplateException {
Boolean result = getBoolean(name);
if (null == result)
return defaultValue;
else
return result;
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public Boolean getBoolean(String name) throws TemplateException {
TemplateModel model = parameters.get(name);
if (null == model) {
return null;
}
if (model instanceof TemplateBooleanModel) {
return ((TemplateBooleanModel) model).getAsBoolean();
} else if (model instanceof TemplateNumberModel) {
return !(0 == ((TemplateNumberModel) model).getAsNumber().intValue());
} else if (model instanceof TemplateScalarModel) {
String s = ((TemplateScalarModel) model).getAsString();
if (StringUtils.isNotBlank(s)) {
return !("0".equals(s) || "false".equalsIgnoreCase(s));
} else {
return null;
}
} else {
return null;
}
}
/**
* @param name
*
* @return
* @throws TemplateException
*/
public Date getDate(String name) throws TemplateException {
TemplateModel model = parameters.get(name);
if (null == model) {
return null;
}
if (model instanceof TemplateDateModel) {
return ((TemplateDateModel) model).getAsDate();
} else if (model instanceof TemplateScalarModel) {
String temp = StringUtils.trimToEmpty(((TemplateScalarModel) model).getAsString());
try {
if (FULL_DATE_LENGTH == temp.length()) {
return FULL_DATE_FORMAT.parse(temp);
} else if (SHORT_DATE_LENGTH == temp.length()) {
return SHORT_DATE_FORMAT.parse(temp);
} else {
return null;
}
} catch (ParseException e) {
return null;
}
} else {
return null;
}
}
/**
* @return the parameters
*/
public Map<String, TemplateModel> getParameters() {
return parameters;
}
/**
* @return the environment
*/
public Environment getEnvironment() {
return environment;
}
/**
* @return the templateDirectiveBody
*/
public TemplateDirectiveBody getTemplateDirectiveBody() {
return templateDirectiveBody;
}
public TemplateModel[] getLoopVars() {
return loopVars;
}
public void setLoopVars(TemplateModel[] loopVars) {
this.loopVars = loopVars;
}
}CmsCategoryListDirective示例
package com.publiccms.views.directive.cms; // Generated 2015-5-10 17:54:56 by SourceMaker import java.io.IOException; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import com.publiccms.logic.service.cms.CmsCategoryService; import com.sanluan.common.base.BaseDirective; import com.sanluan.common.handler.PageHandler; import com.sanluan.common.handler.DirectiveHandler; import freemarker.template.TemplateException; @Component public class CmsCategoryListDirective extends BaseDirective { @Override public void execute(DirectiveHandler handler) throws TemplateException, IOException { PageHandler page = service.getPage(handler.getInteger("parentId"), handler.getString("extend1"), handler.getString("name"), handler.getBoolean("disabled", false), handler.getInteger("pageIndex", 1), handler.getInteger("count", 30)); handler.put("page", page).render(); } @Autowired private CmsCategoryService service; }
标签:PublicCMS
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