public class ExecJs {
/** * 记录日志类 */ private Logger log = Logger.getLogger(ExecJs.class); /** * 后置处理，执行js脚本 * @param js * @throws Exception */ public void execJs(String js, Map<String,Object> map) throws Exception { if (log.isDebugEnabled()) { log.debug("execJs js : " + js); Iterator<Entry<String, Object>> it = map.entrySet().iterator(); while (it.hasNext()) { Entry<String, Object> entry = (Entry<String, Object>) it.next(); log.info("EXECJS MAP : " + entry.getKey() + "---" + entry.getValue()); }// end while }// end if if ("".equals(js) || js == null) { log.info("EXECJS ERROR : JAVASCRIPT CONTENT IS NULL"); } else if(map == null || map.size()<=0){ log.info("EXECJS ERROR : MAP CONTENT IS NULL"); } else { // 获取脚本引擎 ScriptEngineManager mgr = new ScriptEngineManager(); ScriptEngine engine = mgr.getEngineByName("javascript"); // 绑定数据 ScriptContext newContext = new SimpleScriptContext(); Bindings bind = newContext.getBindings(ScriptContext.ENGINE_SCOPE); bind.putAll(map); try { engine.setBindings(bind, ScriptContext.ENGINE_SCOPE); engine.eval(js); } catch (Exception e) { log.info("EXECJS EXCEPTION : EXECUTE JAVASCRIPT EXCEPTION", e); throw (e); }// end try }// end if }}调用例子
boolean flag = false;
String js = “var a = 1; var b = a + aKey;println(b);”;
Map<String,Object> map = new HashMap<String,Object>();
map.put(“aKey”, “aValue”);
try {
flag = execJs.execJs(js, map);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String js = “var a = 1; var b = a + aKey;println(b);”;
Map<String,Object> map = new HashMap<String,Object>();
map.put(“aKey”, “aValue”);
try {
flag = execJs.execJs(js, map);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}