我是struts2的新手。我正在尝试从客户端获取数据并将其插入db。但是在执行此setImageFile（File fie）时不会被调用，因此imageFile对象为null。虽然其他set方法被调用，因此各个成员包含值。
action.class
import com.opensymphony.xwork2.ActionSupport;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.sql.*;
import java.util.Map;
import javax.servlet.http.Part;
import org.apache.struts2.interceptor.SessionAware;
import org.apache.struts2.dispatcher.SessionMap;
public class register extends ActionSupport implements SessionAware{
SessionMap<String, String> sessionMap;
private String name;
private String email;
private String dob;
private String address;
private File imageFile;
private String imageFileFileName;
private String imageFileContentType;
@Override
public void setSession(Map map)
{
sessionMap = (SessionMap)map;
sessionMap.put("", name);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getDob() {
return dob;
}
public void setDob(String dob) {
this.dob = dob;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public File getImageFile() {
return imageFile;
}
public void setFile(File imageFile) {
this.imageFile = imageFile;
}
public void setSessionMap(SessionMap<String, String> sessionMap) {
this.sessionMap = sessionMap;
}
public String execute()
{
try
{
Class.forName("org.postgresql.Driver");
Connection conn=DriverManager.getConnection("jdbc:postgresql://localhost:5432/DemoDB", "postgres", "postgres");
InputStream imageInputStream = new FileInputStream(imageFile);
String query = "insert into userProfile('Name','Address','email','dob','img') values(?,?,?,?,?)";
Date date = Date.valueOf(dob);
PreparedStatement preparedStatement = conn.prepareStatement(query);
preparedStatement.setString(0, name);
preparedStatement.setString(1, address);
preparedStatement.setString(2, email);
preparedStatement.setDate(3, date);
preparedStatement.setBinaryStream(4, imageInputStream, imageFile.length());
preparedStatement.execute();
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
return "success";
}
}
在上面的代码中imageFile为null。其他成员包含价值
struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts
Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="register" namespace="/" extends="tiles-default">
<action name="register" class="com.passportseva.register">
<result name="success" type="tiles">login</result>
<result name="input" type="tiles">register</result>
<result name="error">layoutmanager.jsp</result>
</action>
</package>
</struts>
这是在其中调用动作的jsp
registration.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<form action="register" method="POST">
<div>
<div><h1>Name</h1></div>
<input type="text" name="name" hint="name"/>
</div>
<div>
<div><h1>Email</h1>></div>
<input type="text" name="email" hint="email"/>
</div>
<div>
<div><h1>DOB</h1></div>
<input type="date" name="dob"/>
</div>
<div>
<div><h1>Address</h1></div>
<input type="area" name="address" hint="address"/>
</div>
<div>
<s:file name="imageFile" label="image"/>
</div>
<input type="submit" value="register"/>
</form>
</body>
</html>
我在这里用瓷砖Tiles.xml
<!DOCTYPE tiles-definitions PUBLIC
"-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN"
"http://tiles.apache.org/dtds/tiles-config_2_0.dtd">
<tiles-definitions>
<definition name="login" template="/layoutmanager.jsp">
<put-attribute name="title" value="Login Page"/>
<put-attribute name="body" value="/login.jsp"/>
</definition>
<definition name="register" template="/layoutmanager.jsp">
<put-attribute name="title" value="Passport seva registration"/>
<put-attribute name="body" value="/registration.jsp"/>
</definition>
</tiles-definitions>
输出显示imageFile的无效字段值。
将Struts Form标记与enctype属性一起使用。
<s:form action="register" method="POST" enctype="multipart/form-data">
</s:form>