java学习笔记 (8) —— Struts2 实现上传

2021-08-14 01:00:55

1、新建upload.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

  </head>

  <body>

  <s:form action="upload" theme="simple" method="post" namespace="" enctype="multipart/form-data">

      <table align="center" width="40%" border="1">

          <tr>

              <td>

                  username

              </td>

              <td>

                  <s:textfield name="username" ></s:textfield>

              </td>

          </tr>

           <tr>

              <td>

                  password

              </td>

              <td>

                  <s:textfield name="password" ></s:textfield>

              </td>

          </tr>

        <tr>

              <td>

                  file

              </td>

              <td>

                <s:file name="file"></s:file>

              </td>

          </tr>

        <tr>

              <td>

                <s:submit value=" submit "></s:submit>

              </td>

              <td>

                  <s:reset value=" reset "></s:reset>

              </td>

          </tr>

      </table>

  </s:form>

  </body>

</html>

2、新建uploadResult.jsp

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>

<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <title>My JSP 'uploadResult.jsp' starting page</title>

  </head>

  <body>

    username:<s:property value="username"></s:property>

      password:<s:property value="password"></s:property>

      file:<s:property value="fileFileName"></s:property>

  </body>

</html>

3、新建UploadAction.java

package com.test.action;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {

    private static final long serialVersionUID = 1L;

    private String username;

    private String password;

    //必须添加的三个属性
　　//file

    private File file;

    //fileFileName

    private String fileFileName;

    //fileContentType

    private String fileContentType;

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

    public File getFile() {

        return file;

    }

    public void setFile(File file) {

        this.file = file;

    }

    public String getFileFileName() {

        return fileFileName;

    }

    public void setFileFileName(String fileFileName) {

        this.fileFileName = fileFileName;

    }

    public String getFileContentType() {

        return fileContentType;

    }

    public void setFileContentType(String fileContentType) {

        this.fileContentType = fileContentType;

    }

    public String execute() throws Exception

    {

        InputStream is = new FileInputStream(file);

        String root = ServletActionContext.getServletContext().getRealPath("/upload");

        File destFile = new File(root,this.getFileFileName());

        OutputStream os = new FileOutputStream(destFile);

        //字节数组

        byte[] buffer = new byte[400];

        int length = 0;

        while ((length = is.read(buffer))>0) {

            os.write(buffer);

        }

        is.close();

        os.close();

        return SUCCESS;

    }

}

4、struts.xml

            <action name="upload" class="com.test.action.UploadAction">

                <result name="success">/uploadResult.jsp</result>

            </action>

多文件上传：

1、upload.jsp

  <body>

  <s:form action="upload" theme="simple" method="post" namespace="" enctype="multipart/form-data">

      <table align="center" width="40%" border="1">

          <tr>

              <td>

                  username

              </td>

              <td>

                  <s:textfield name="username" ></s:textfield>

              </td>

          </tr>

           <tr>

              <td>

                  password

              </td>

              <td>

                  <s:textfield name="password" ></s:textfield>

              </td>

          </tr>

        <tr>

              <td>

                  file1

              </td>

              <td>

                <s:file name="file"></s:file>

              </td>

          </tr>

          <tr>

              <td>

                  file2

              </td>

              <td>

                <s:file name="file"></s:file>

              </td>

          </tr>

                  <tr>

              <td>

                  file3

              </td>

              <td>

                <s:file name="file"></s:file>

              </td>

          </tr>

        <tr>

              <td>

                <s:submit value=" submit "></s:submit>

              </td>

              <td>

                  <s:reset value=" reset "></s:reset>

              </td>

          </tr>

      </table>

  </s:form>

  </body>

2、uploadResult.jsp

  <body>

    username:<s:property value="username"></s:property>

      password:<s:property value="password"></s:property>

      file:<s:property value="fileFileName"></s:property>

  </body>

3、uploadAction.jsp

package com.test.action;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.List;

import javax.swing.ListModel;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {

    private static final long serialVersionUID = 1L;

    private String username;

    private String password;

    private List<File> file;

    private List<String> fileFileName;

    private List<String> fileContentType;

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

    public List<File> getFile() {

        return file;

    }

    public void setFile(List<File> file) {

        this.file = file;

    }

    public List<String> getFileFileName() {

        return fileFileName;

    }

    public void setFileFileName(List<String> fileFileName) {

        this.fileFileName = fileFileName;

    }

    public List<String> getFileContentType() {

        return fileContentType;

    }

    public void setFileContentType(List<String> fileContentType) {

        this.fileContentType = fileContentType;

    }

    public String execute() throws Exception

    {

        for (int i = 0; i < file.size(); i++) {

            InputStream is = new FileInputStream(file.get(i));

            String root = ServletActionContext.getServletContext().getRealPath("/upload");

            File destFile = new File(root,this.getFileFileName().get(i));

            OutputStream os = new FileOutputStream(destFile);

            //字节数组

            byte[] buffer = new byte[400];

            int length = 0;

            while ((length = is.read(buffer))>0) {

                os.write(buffer);

            }

            is.close();

            os.close();

        }

        return SUCCESS;

    }

}

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