strut2
三.在struts2中实现(以图片上传为例)
1.FileUpload.jsp代码清单如下:
Java代码
1. <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2. <%@ taglib prefix="s" uri="/struts-tags" %>
3. <html>
4. <head>
5. <title>The FileUplaodDemo In Struts2</title>
6. </head>
7.
8. <body>
9. <s:form action="fileUpload.action" method="POST" enctype="multipart/form-data">
10. <s:file name="myFile" label="MyFile" ></s:file>
11. <s:textfield name="caption" label="Caption"></s:textfield>
12. <s:submit label="提交"></s:submit>
13. </s:form>
14. </body>
15. </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>The FileUplaodDemo In Struts2</title>
</head>
<body>
<s:form action="fileUpload.action" method="POST" enctype="multipart/form-data">
<s:file name="myFile" label="MyFile" ></s:file>
<s:textfield name="caption" label="Caption"></s:textfield>
<s:submit label="提交"></s:submit>
</s:form>
</body>
</html>
2.ShowUpload.jsp的功能清单如下:
Java代码
1. <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2. <%@ taglib prefix="s" uri="/struts-tags" %>
3. <html>
4. <head>
5. <title>ShowUpload</title>
6. </head>
7.
8. <body>
9. <div style ="padding: 3px; border: solid 1px #cccccc; text-align: center" >
10. <img src ='UploadImages/<s:property value ="imageFileName"/> '/>
11. <br />
12. <s:property value ="caption"/>
13. </div >
14. </body>
15. </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>ShowUpload</title>
</head>
<body>
<div style ="padding: 3px; border: solid 1px #cccccc; text-align: center" >
<img src ='UploadImages/<s:property value ="imageFileName"/> '/>
<br />
<s:property value ="caption"/>
</div >
</body>
</html>
3.FileUploadAction.java的代码清单如下 :
Java代码
1. package com.chris;
2.
3. import java.io.*;
4. import java.util.Date;
5.
6. import org.apache.struts2.ServletActionContext;
7.
8.
9. import com.opensymphony.xwork2.ActionSupport;
10.
11. public class FileUploadAction extends ActionSupport{
12.
13. private static final long serialVersionUID = 572146812454l ;
14. private static final int BUFFER_SIZE = 16 * 1024 ;
15.
16. //注意，文件上传时<s:file/>同时与myFile，myFileContentType,myFileFileName绑定
17. //所以同时要提供myFileContentType,myFileFileName的set方法
18.
19. private File myFile; //上传文件
20. private String contentType;//上传文件类型
21. private String fileName; //上传文件名
22. private String imageFileName;
23. private String caption;//文件说明，与页面属性绑定
24.
25. public void setMyFileContentType(String contentType) {
26. System.out.println("contentType : " + contentType);
27. this .contentType = contentType;
28. }
29.
30. public void setMyFileFileName(String fileName) {
31. System.out.println("FileName : " + fileName);
32. this .fileName = fileName;
33. }
34.
35. public void setMyFile(File myFile) {
36. this .myFile = myFile;
37. }
38.
39. public String getImageFileName() {
40. return imageFileName;
41. }
42.
43. public String getCaption() {
44. return caption;
45. }
46.
47. public void setCaption(String caption) {
48. this .caption = caption;
49. }
50.
51. private static void copy(File src, File dst) {
52. try {
53. InputStream in = null ;
54. OutputStream out = null ;
55. try {
56. in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE);
57. out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE);
58. byte [] buffer = new byte [BUFFER_SIZE];
59. while (in.read(buffer) > 0 ) {
60. out.write(buffer);
61. }
62. } finally {
63. if ( null != in) {
64. in.close();
65. }
66. if ( null != out) {
67. out.close();
68. }
69. }
70. } catch (Exception e) {
71. e.printStackTrace();
72. }
73. }
74.
75. private static String getExtention(String fileName) {
76. int pos = fileName.lastIndexOf(".");
77. return fileName.substring(pos);
78. }
79.
80. @Override
81. public String execute() {
82. imageFileName = new Date().getTime() + getExtention(fileName);
83. File imageFile = new File(ServletActionContext.getServletContext().getRealPath("/UploadImages" ) + "/" + imageFileName);
84. copy(myFile, imageFile);
85. return SUCCESS;
86. }
87. }
package com.chris;
import java.io.*;
import java.util.Date;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class FileUploadAction extends ActionSupport{
private static final long serialVersionUID = 572146812454l ;
private static final int BUFFER_SIZE = 16 * 1024 ;
//注意，文件上传时<s:file/>同时与myFile，myFileContentType,myFileFileName绑定
//所以同时要提供myFileContentType,myFileFileName的set方法
private File myFile; //上传文件
private String contentType;//上传文件类型
private String fileName; //上传文件名
private String imageFileName;
private String caption;//文件说明，与页面属性绑定
public void setMyFileContentType(String contentType) {
System.out.println("contentType : " + contentType);
this .contentType = contentType;
}
public void setMyFileFileName(String fileName) {
System.out.println("FileName : " + fileName);
this .fileName = fileName;
}
public void setMyFile(File myFile) {
this .myFile = myFile;
}
public String getImageFileName() {
return imageFileName;
}
public String getCaption() {
return caption;
}
public void setCaption(String caption) {
this .caption = caption;
}
private static void copy(File src, File dst) {
try {
InputStream in = null ;
OutputStream out = null ;
try {
in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE);
out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE);
byte [] buffer = new byte [BUFFER_SIZE];
while (in.read(buffer) > 0 ) {
out.write(buffer);
}
} finally {
if ( null != in) {
in.close();
}
if ( null != out) {
out.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
private static String getExtention(String fileName) {
int pos = fileName.lastIndexOf(".");
return fileName.substring(pos);
}
@Override
public String execute() {
imageFileName = new Date().getTime() + getExtention(fileName);
File imageFile = new File(ServletActionContext.getServletContext().getRealPath("/UploadImages" ) + "/" + imageFileName);
copy(myFile, imageFile);
return SUCCESS;
}
}
注:此时仅为方便实现Action所以继承ActionSupport,并Overrider execute()方法
在struts2中任何一个POJO都可以作为Action
4.struts.xml清单如下:
Java代码
1. <?xml version="1.0" encoding="UTF-8" ?>
2. <!DOCTYPE struts PUBLIC
3. "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
4. "http://struts.apache.org/dtds/struts-2.0.dtd">
5. <struts>
6. <package name="example" namespace="/" extends="struts-default">
7. <action name="fileUpload" class="com.chris.FileUploadAction">
8. <interceptor-ref name="fileUploadStack"/>
9. <result>/ShowUpload.jsp</result>
10. </action>
11. </package>
12. </struts>
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="example" namespace="/" extends="struts-default">
<action name="fileUpload" class="com.chris.FileUploadAction">
<interceptor-ref name="fileUploadStack"/>
<result>/ShowUpload.jsp</result>
</action>
</package>
</struts>
5.web.xml清单如下:
Java代码
1. <?xml version="1.0" encoding="UTF-8"?>
2. <web-app version="2.4"
3. xmlns="http://java.sun.com/xml/ns/j2ee"
4. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5. xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
6. http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
7. <filter >
8. <filter-name > struts-cleanup </filter-name >
9. <filter-class >
10. org.apache.struts2.dispatcher.ActionContextCleanUp
11. </filter-class >
12. </filter >
13. <filter-mapping >
14. <filter-name > struts-cleanup </filter-name >
15. <url-pattern > /* </url-pattern >
16. </filter-mapping >
17.
18. <filter>
19. <filter-name>struts2</filter-name>
20. <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
21. </filter>
22. <filter-mapping>
23. <filter-name>struts2</filter-name>
24. <url-pattern>/*</url-pattern>
25. </filter-mapping>
26. <welcome-file-list>
27. <welcome-file>Index.jsp</welcome-file>
28. </welcome-file-list>
29.
30. </web-app>
1.FileUpload.jsp代码清单如下:
Java代码
1. <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2. <%@ taglib prefix="s" uri="/struts-tags" %>
3. <html>
4. <head>
5. <title>The FileUplaodDemo In Struts2</title>
6. </head>
7.
8. <body>
9. <s:form action="fileUpload.action" method="POST" enctype="multipart/form-data">
10. <s:file name="myFile" label="MyFile" ></s:file>
11. <s:textfield name="caption" label="Caption"></s:textfield>
12. <s:submit label="提交"></s:submit>
13. </s:form>
14. </body>
15. </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>The FileUplaodDemo In Struts2</title>
</head>
<body>
<s:form action="fileUpload.action" method="POST" enctype="multipart/form-data">
<s:file name="myFile" label="MyFile" ></s:file>
<s:textfield name="caption" label="Caption"></s:textfield>
<s:submit label="提交"></s:submit>
</s:form>
</body>
</html>
2.ShowUpload.jsp的功能清单如下:
Java代码
1. <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
2. <%@ taglib prefix="s" uri="/struts-tags" %>
3. <html>
4. <head>
5. <title>ShowUpload</title>
6. </head>
7.
8. <body>
9. <div style ="padding: 3px; border: solid 1px #cccccc; text-align: center" >
10. <img src ='UploadImages/<s:property value ="imageFileName"/> '/>
11. <br />
12. <s:property value ="caption"/>
13. </div >
14. </body>
15. </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>ShowUpload</title>
</head>
<body>
<div style ="padding: 3px; border: solid 1px #cccccc; text-align: center" >
<img src ='UploadImages/<s:property value ="imageFileName"/> '/>
<br />
<s:property value ="caption"/>
</div >
</body>
</html>
3.FileUploadAction.java的代码清单如下 :
Java代码
1. package com.chris;
2.
3. import java.io.*;
4. import java.util.Date;
5.
6. import org.apache.struts2.ServletActionContext;
7.
8.
9. import com.opensymphony.xwork2.ActionSupport;
10.
11. public class FileUploadAction extends ActionSupport{
12.
13. private static final long serialVersionUID = 572146812454l ;
14. private static final int BUFFER_SIZE = 16 * 1024 ;
15.
16. //注意，文件上传时<s:file/>同时与myFile，myFileContentType,myFileFileName绑定
17. //所以同时要提供myFileContentType,myFileFileName的set方法
18.
19. private File myFile; //上传文件
20. private String contentType;//上传文件类型
21. private String fileName; //上传文件名
22. private String imageFileName;
23. private String caption;//文件说明，与页面属性绑定
24.
25. public void setMyFileContentType(String contentType) {
26. System.out.println("contentType : " + contentType);
27. this .contentType = contentType;
28. }
29.
30. public void setMyFileFileName(String fileName) {
31. System.out.println("FileName : " + fileName);
32. this .fileName = fileName;
33. }
34.
35. public void setMyFile(File myFile) {
36. this .myFile = myFile;
37. }
38.
39. public String getImageFileName() {
40. return imageFileName;
41. }
42.
43. public String getCaption() {
44. return caption;
45. }
46.
47. public void setCaption(String caption) {
48. this .caption = caption;
49. }
50.
51. private static void copy(File src, File dst) {
52. try {
53. InputStream in = null ;
54. OutputStream out = null ;
55. try {
56. in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE);
57. out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE);
58. byte [] buffer = new byte [BUFFER_SIZE];
59. while (in.read(buffer) > 0 ) {
60. out.write(buffer);
61. }
62. } finally {
63. if ( null != in) {
64. in.close();
65. }
66. if ( null != out) {
67. out.close();
68. }
69. }
70. } catch (Exception e) {
71. e.printStackTrace();
72. }
73. }
74.
75. private static String getExtention(String fileName) {
76. int pos = fileName.lastIndexOf(".");
77. return fileName.substring(pos);
78. }
79.
80. @Override
81. public String execute() {
82. imageFileName = new Date().getTime() + getExtention(fileName);
83. File imageFile = new File(ServletActionContext.getServletContext().getRealPath("/UploadImages" ) + "/" + imageFileName);
84. copy(myFile, imageFile);
85. return SUCCESS;
86. }
87. }
package com.chris;
import java.io.*;
import java.util.Date;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class FileUploadAction extends ActionSupport{
private static final long serialVersionUID = 572146812454l ;
private static final int BUFFER_SIZE = 16 * 1024 ;
//注意，文件上传时<s:file/>同时与myFile，myFileContentType,myFileFileName绑定
//所以同时要提供myFileContentType,myFileFileName的set方法
private File myFile; //上传文件
private String contentType;//上传文件类型
private String fileName; //上传文件名
private String imageFileName;
private String caption;//文件说明，与页面属性绑定
public void setMyFileContentType(String contentType) {
System.out.println("contentType : " + contentType);
this .contentType = contentType;
}
public void setMyFileFileName(String fileName) {
System.out.println("FileName : " + fileName);
this .fileName = fileName;
}
public void setMyFile(File myFile) {
this .myFile = myFile;
}
public String getImageFileName() {
return imageFileName;
}
public String getCaption() {
return caption;
}
public void setCaption(String caption) {
this .caption = caption;
}
private static void copy(File src, File dst) {
try {
InputStream in = null ;
OutputStream out = null ;
try {
in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE);
out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE);
byte [] buffer = new byte [BUFFER_SIZE];
while (in.read(buffer) > 0 ) {
out.write(buffer);
}
} finally {
if ( null != in) {
in.close();
}
if ( null != out) {
out.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
private static String getExtention(String fileName) {
int pos = fileName.lastIndexOf(".");
return fileName.substring(pos);
}
@Override
public String execute() {
imageFileName = new Date().getTime() + getExtention(fileName);
File imageFile = new File(ServletActionContext.getServletContext().getRealPath("/UploadImages" ) + "/" + imageFileName);
copy(myFile, imageFile);
return SUCCESS;
}
}
注:此时仅为方便实现Action所以继承ActionSupport,并Overrider execute()方法
在struts2中任何一个POJO都可以作为Action
4.struts.xml清单如下:
Java代码
1. <?xml version="1.0" encoding="UTF-8" ?>
2. <!DOCTYPE struts PUBLIC
3. "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
4. "http://struts.apache.org/dtds/struts-2.0.dtd">
5. <struts>
6. <package name="example" namespace="/" extends="struts-default">
7. <action name="fileUpload" class="com.chris.FileUploadAction">
8. <interceptor-ref name="fileUploadStack"/>
9. <result>/ShowUpload.jsp</result>
10. </action>
11. </package>
12. </struts>
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="example" namespace="/" extends="struts-default">
<action name="fileUpload" class="com.chris.FileUploadAction">
<interceptor-ref name="fileUploadStack"/>
<result>/ShowUpload.jsp</result>
</action>
</package>
</struts>
5.web.xml清单如下:
Java代码
1. <?xml version="1.0" encoding="UTF-8"?>
2. <web-app version="2.4"
3. xmlns="http://java.sun.com/xml/ns/j2ee"
4. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5. xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
6. http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
7. <filter >
8. <filter-name > struts-cleanup </filter-name >
9. <filter-class >
10. org.apache.struts2.dispatcher.ActionContextCleanUp
11. </filter-class >
12. </filter >
13. <filter-mapping >
14. <filter-name > struts-cleanup </filter-name >
15. <url-pattern > /* </url-pattern >
16. </filter-mapping >
17.
18. <filter>
19. <filter-name>struts2</filter-name>
20. <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
21. </filter>
22. <filter-mapping>
23. <filter-name>struts2</filter-name>
24. <url-pattern>/*</url-pattern>
25. </filter-mapping>
26. <welcome-file-list>
27. <welcome-file>Index.jsp</welcome-file>
28. </welcome-file-list>
29.
30. </web-app>