我的页面有一个username控件.我想在validate验证失败后把错误打在username控件的右面.现在能打印出来.但是我资原文件中写的是{0} can not be empty. 我想要的结果是username can not be empty 可是显示的是{0} can not be empty 请问如何把{0}用username替换啊.昨天还会的.过一天就忘了.高手帮个忙.
ActionForm:
package c1;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;public class LoginActionForm extends ActionForm { private String username;
public String getUsername() {
return username;
} public void setUsername(String username) {
this.username = username;
}
@Override
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
if ("".equals(this.getUsername()) || this.username == null) {
ActionErrors ae = new ActionErrors();
ActionMessage am = new ActionMessage("error.eng");
ae.add("username", am);
return ae;
} else {
return super.validate(mapping, request);
}
}
}
Structs_config.xml :
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config SYSTEM "struts-config_1_1.dtd">
<struts-config>
<form-beans>
<form-bean name="login" type="c1.LoginActionForm"></form-bean>
</form-beans>
<action-mappings>
<action path="/c1/main" name="login" type="c1.LoginAction" input="/c1/test1.jsp" validate="true">
</action>
</action-mappings>
<message-resources parameter="resource"></message-resources>
</struts-config>
resource.properties:
error.eng = {0} can not empty
ActionForm:
package c1;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;public class LoginActionForm extends ActionForm { private String username;
public String getUsername() {
return username;
} public void setUsername(String username) {
this.username = username;
}
@Override
public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {
if ("".equals(this.getUsername()) || this.username == null) {
ActionErrors ae = new ActionErrors();
ActionMessage am = new ActionMessage("error.eng");
ae.add("username", am);
return ae;
} else {
return super.validate(mapping, request);
}
}
}
Structs_config.xml :
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config SYSTEM "struts-config_1_1.dtd">
<struts-config>
<form-beans>
<form-bean name="login" type="c1.LoginActionForm"></form-bean>
</form-beans>
<action-mappings>
<action path="/c1/main" name="login" type="c1.LoginAction" input="/c1/test1.jsp" validate="true">
</action>
</action-mappings>
<message-resources parameter="resource"></message-resources>
</struts-config>
resource.properties:
error.eng = {0} can not empty
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<%@ taglib prefix="structs-html" uri="/WEB-INF/struts-html.tld"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="main.do">
username<input type="text"><structs-html:errors property="username"/><br>
<input type="submit" value="提交">
</form>
</body>
</html>
应该写为:
ActionMessage am = new ActionMessage("error.eng", username); 要把占位符对应的username变量加进去才行。