import org.apache.ibatis.type.SimpleTypeRegistry; //导入依赖的package包/类
@Override
public String handleToken(String content) {
  Object parameter = context.getBindings().get("_parameter");
  if (parameter == null) {
    context.getBindings().put("value", null);
  } else if (SimpleTypeRegistry.isSimpleType(parameter.getClass())) {
    context.getBindings().put("value", parameter);
  }
  Object value = OgnlCache.getValue(content, context.getBindings());
  String srtValue = (value == null ? "" : String.valueOf(value)); // issue #274 return "" instead of "null"
  checkInjection(srtValue);
  return srtValue;
}
 

import org.apache.ibatis.type.SimpleTypeRegistry; //导入依赖的package包/类
@Override
public String handleToken(String content) {
  Object parameter = context.getBindings().get("_parameter");
  if (parameter == null) {
    context.getBindings().put("value", null);
  } else if (SimpleTypeRegistry.isSimpleType(parameter.getClass())) {
    context.getBindings().put("value", parameter);
  }
  //从缓存里取得值
  Object value = OgnlCache.getValue(content, context.getBindings());
  String srtValue = (value == null ? "" : String.valueOf(value)); // issue #274 return "" instead of "null"
  checkInjection(srtValue);
  return srtValue;
}