struts2 Validator 整合freemarker 取得FieldError的方法
对源代码进行跟踪：
protected void addActionError(Object object) { validatorContext.addActionError(getMessage(object)); } protected void addFieldError(String propertyName, Object object) { validatorContext.addFieldError(propertyName, getMessage(object)); } public interface ValidatorContext extends ValidationAware, TextProvider, LocaleProvider { public abstract String getFullFieldName(String s); }
public interface ValidationAware { public abstract void setActionErrors(Collection collection); public abstract Collection getActionErrors(); public abstract void setActionMessages(Collection collection); public abstract Collection getActionMessages(); public abstract void setFieldErrors(Map map); public abstract Map getFieldErrors(); public abstract void addActionError(String s); public abstract void addActionMessage(String s); public abstract void addFieldError(String s, String s1); public abstract boolean hasActionErrors(); public abstract boolean hasActionMessages(); public abstract boolean hasErrors(); public abstract boolean hasFieldErrors(); }
发现public abstract Map getFieldErrors();是个Map，要把Map转换成list在Map后面加个?keys就可以了，对应页面获取方法：
<#if actionMessages?size gt 0 || fieldErrors?size gt 0> <center> <div id="actionMessages" class="hightLightDiv"> <ul> <#list actionMessages as message> <li>${message?default("你请求的页面出错了！")?html?replace("\r\n","<br>")}</li> </#list> <#list fieldErrors?keys as field> <li>${field}:${fieldErrors[field]?default("你请求的页面出错了！")?html?replace("\r\n","<br>")}</li> </#list> </ul> </div> </center> </#if>相关资源：Java 面经手册·小傅哥(公众号：bugstack虫洞栈).pdf
