解决使用Struts2的s:textfield标签出现Unable to find setter method for attribute: style的问题

来源：互联网发布：免费排课软件编辑：程序博客网时间：2024/06/05 21:05

把项目中的struts2从2.3.1.2升级到2.3.20，跑起来之后出现一个这样的问题：

org.apache.jasper.JasperException: /pages/login.jsp (line: 103, column: 7) Unable to find setter method for attribute: style

错误消息很明显：没有style的setter方法，但是很诡异，jsp中哪有什么setter方法，定位到代码一看，是s:textfield中的style属性：

<s:textfield label="用户ID" name="model.userid" id="userid" required="true" class="{character:true}" style="width:220px; height:30px; margin-left:10px;" />

谷歌下，发现是Struts2 2.3.20的一个bug，org.apache.struts2.views.jsp.ui.AbstractUITagBeanInfo中没有对style属性进行解析处理：

public class AbstractUITagBeanInfo extends SimpleBeanInfo {    private static final Logger LOG = LoggerFactory.getLogger(AbstractUITagBeanInfo.class);    @Override    public PropertyDescriptor[] getPropertyDescriptors() {        try {            List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>();            // Add the tricky one first            Method setter = AbstractUITag.class.getMethod("setCssClass", String.class);            descriptors.add(new PropertyDescriptor("class", null, setter));            descriptors.add(new PropertyDescriptor("cssClass", null, setter));            for (Field field : AbstractUITag.class.getDeclaredFields()) {                String fieldName = field.getName();                if (!"dynamicAttributes".equals(fieldName)) {                    String setterName = "set" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);                    setter = AbstractUITag.class.getMethod(setterName, String.class);                    descriptors.add(new PropertyDescriptor(fieldName, null, setter));                }            }            PropertyDescriptor[] array = new PropertyDescriptor[descriptors.size()];            return descriptors.toArray(array);        } catch (Exception e) {            // This is crazy talk, we're only doing things that should always succeed            LOG.fatal("Could not construct bean info for AbstractUITag. This is very bad.", e);            return null;        }    }}

目前已经在2.3.21中已经修复了：

public class AbstractUITagBeanInfo extends SimpleBeanInfo {     private static final Logger LOG = LoggerFactory.getLogger(AbstractUITagBeanInfo.class);     @Override    public PropertyDescriptor[] getPropertyDescriptors() {        try {            List<PropertyDescriptor> descriptors = new ArrayList<PropertyDescriptor>();             // Add the tricky one first            Method classSetter = AbstractUITag.class.getMethod("setCssClass", String.class);            Method styleSetter = AbstractUITag.class.getMethod("setCssStyle", String.class);             descriptors.add(new PropertyDescriptor("class", null, classSetter));            descriptors.add(new PropertyDescriptor("cssClass", null, classSetter));             descriptors.add(new PropertyDescriptor("style", null, styleSetter));            descriptors.add(new PropertyDescriptor("cssStyle", null, styleSetter));             for (Field field : AbstractUITag.class.getDeclaredFields()) {                String fieldName = field.getName();                if (!"dynamicAttributes".equals(fieldName)) {                    String setterName = "set" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);                    Method setter = AbstractUITag.class.getMethod(setterName, String.class);                    descriptors.add(new PropertyDescriptor(fieldName, null, setter));                }            }             PropertyDescriptor[] array = new PropertyDescriptor[descriptors.size()];            return descriptors.toArray(array);        } catch (Exception e) {            // This is crazy talk, we're only doing things that should always succeed            LOG.fatal("Could not construct bean info for AbstractUITag. This is very bad.", e);            return null;        }    } }

jira：https://fisheye6.atlassian.com/browse/struts/core/src/main/java/org/apache/struts2/views/jsp/ui/AbstractUITagBeanInfo.java?r1=587e3a41b1d306eb246aa39d71dce469f4e50e9d&r2=4964b74797971751bedad0ba0982f53ef0934a2c

0 0