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在java中下載的代碼 網(wǎng)上下載的java代碼怎么運行

求一個Java實現(xiàn)自動下載的源代碼

您好,這樣的:

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/**

*

*/

package com.b510.base.bean.install;

import java.io.File;

import java.io.FileWriter;

import java.text.SimpleDateFormat;

import java.util.Date;

/**

* @author hongten(hongtenzone@foxmail.com)

* @date 2013-2-24

*/

@SuppressWarnings("unchecked")

public class BeanUtils {

//公共部分

private static final String RT_1 = "\r\n";

private static final String RT_2 = RT_1+RT_1;

private static final String BLANK_1 =" ";

private static final String BLANK_4 =" ";

private static final String BLANK_8 =BLANK_4 + BLANK_4;

//注釋部分

private static final String ANNOTATION_AUTHOR_PARAMTER = "@author ";

private static final String ANNOTATION_AUTHOR_NAME = "hongten(hongtenzone@foxmail.com)";

private static final String ANNOTATION_AUTHOR = ANNOTATION_AUTHOR_PARAMTER + ANNOTATION_AUTHOR_NAME;

private static final String ANNOTATION_DATE = "@date ";

private static final String ANNOTATION = "/**"+RT_1+BLANK_1+"*"+BLANK_1+ANNOTATION_AUTHOR +RT_1+BLANK_1+"*"+BLANK_1+ANNOTATION_DATE +getDate()+RT_1+BLANK_1+"*/"+RT_1;

//文件 地址

//private static final String BEAN_PATH = "com/b510/base/bean";

private static final String DAO_PATH = "com/b510/base/dao";

private static final String DAO_IMPL_PATH = "com/b510/base/dao/impl";

private static final String SERVICE_PATH = "com/b510/base/service";

private static final String SERVICE_IMPL_PATH = "com/b510/base/service/impl";

//包名

private static final String BEAN_URL = "com.b510.base.bean";

private static final String DAO_URL = "com.b510.base.dao";

private static final String DAO_IMPL_URL = "com.b510.base.dao.impl";

private static final String SERVICE_URL = "com.b510.base.service";

private static final String SERVICE_IMPL_URL = "com.b510.base.service.impl";

//基本類名稱

private static final String BASE_DAO_NAME = DAO_URL + ".BaseDao";

private static final String ABSTRACT_BASE_DAO_IMPL_NAME = DAO_IMPL_URL + ".AbstractBaseDaoImpl";

private static final String BASE_SERVICE_NAME = SERVICE_URL + ".BaseService";

private static final String ABSTRACT_BASE_SERVICE_IMPL_NAME = SERVICE_IMPL_URL + ".AbstractBaseServiceImpl";

/**

* 創(chuàng)建bean的Daobr

*

* @param c

* @throws Exception

*/

public void createBeanDao(Class c) throws Exception {

String cName = c.getName();

String fileName = System.getProperty("user.dir") + "/src/" + DAO_PATH

+ "/" + getLastChar(cName) + "Dao.java";

File f = new File(fileName);

FileWriter fw = new FileWriter(f);

fw.write("package "+DAO_URL+";"+RT_2+ANNOTATION+"public interface " +

getLastChar(cName) + "Dao extends "+BASE_DAO_NAME+" " + cName + " {"+RT_2+"}");

fw.flush();

fw.close();

showInfo(fileName);

}

/**

* 創(chuàng)建bean的Dao的實現(xiàn)類

* @param c

* @throws Exception

*/

public void createBeanDaoImpl(Class c) throws Exception{

String cName = c.getName();

String fileName = System.getProperty("user.dir") + "/src/" + DAO_IMPL_PATH

+ "/" + getLastChar(cName) + "DaoImpl.java";

File f = new File(fileName);

FileWriter fw = new FileWriter(f);

fw.write("package "+DAO_IMPL_URL+";"+RT_2+ANNOTATION+"public class " +

getLastChar(cName) + "DaoImpl extends "+ABSTRACT_BASE_DAO_IMPL_NAME+"" +

cName + " implements "+DAO_URL+"."+getLastChar(cName)+"Dao{"+RT_2+"}");

fw.flush();

fw.close();

showInfo(fileName);

}

/**

* 創(chuàng)建bean的service

* @param c

* @throws Exception

*/

public void createBeanService(Class c) throws Exception{

String cName = c.getName();

String fileName = System.getProperty("user.dir") + "/src/" + SERVICE_PATH

+ "/" + getLastChar(cName) + "Service.java";

File f = new File(fileName);

FileWriter fw = new FileWriter(f);

fw.write("package "+SERVICE_URL+";"+RT_2+ANNOTATION+"public interface " +

getLastChar(cName) + "Service extends "+BASE_SERVICE_NAME+""+ cName +"{"+RT_2+"}");

fw.flush();

fw.close();

showInfo(fileName);

}

/**

* 創(chuàng)建bean的service的實現(xiàn)類

* @param c

* @throws Exception

*/

public void createBeanServiceImpl(Class c) throws Exception{

String cName = c.getName();

String fileName = System.getProperty("user.dir") + "/src/" + SERVICE_IMPL_PATH

+ "/" +getLastChar(cName)+"ServiceImpl.java";

File f = new File(fileName);

FileWriter fw = new FileWriter(f);

fw.write("package "+SERVICE_IMPL_URL+";"+RT_2+ANNOTATION+"public class "

+ getLastChar(cName) + "ServiceImpl extends "+ABSTRACT_BASE_SERVICE_IMPL_NAME+""+ cName

+ " implements "+SERVICE_URL+"."+getLastChar(cName)+"Service{"+RT_2+BLANK_4

+"private "+DAO_URL+"."+getLastChar(cName)+"Dao "+getLowercaseChar(getLastChar(cName))

+"Dao;"+RT_2+BLANK_4+"public void set"+getLastChar(cName)+"Dao("+DAO_URL+"."+getLastChar(cName)+"Dao "

+getLowercaseChar(getLastChar(cName))+"Dao){"+RT_1+BLANK_8+"this."+getLowercaseChar(getLastChar(cName))+"Dao = "

+getLowercaseChar(getLastChar(cName))+"Dao;"+RT_1+BLANK_4+"}"+RT_2+BLANK_4+"@Override"+RT_1+BLANK_4

+"public "+DAO_URL+"."+"BaseDao"+BEAN_URL+"."+getLastChar(cName)+" getBaseDao(){"+RT_1+BLANK_8

+"return "+getLowercaseChar(getLastChar(cName))+"Dao;"+RT_1+BLANK_4+"}"+RT_2+"}");

fw.flush();

fw.close();

showInfo(fileName);

}

/**

* 獲取路徑的最后面字符串br

* 如:br

* codestr = "com.b510.base.bean.User"/codebr

* code return "User";code

* @param str

* @return

*/

public String getLastChar(String str) {

if ((str != null) (str.length() 0)) {

int dot = str.lastIndexOf('.');

if ((dot -1) (dot (str.length() - 1))) {

return str.substring(dot + 1);

}

}

return str;

}

/**

* 把第一個字母變?yōu)樾慴r

* 如:br

* codestr = "UserDao";/codebr

* codereturn "userDao";/code

* @param str

* @return

*/

public String getLowercaseChar(String str){

return str.substring(0,1).toLowerCase()+str.substring(1);

}

/**

* 顯示信息

* @param info

*/

public void showInfo(String info){

System.out.println("創(chuàng)建文件:"+ info+ "成功!");

}

/**

* 獲取系統(tǒng)時間

* @return

*/

public static String getDate(){

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

return simpleDateFormat.format(new Date());

}

}

如何將下載的java源代碼導(dǎo)入到eclipse中運行

eclipse打開并運行一個已經(jīng)寫好的java文件步驟如下:

1、新建一個java工程項目:右鍵Eclipse的PackageExplorer空白部分,點擊New,再點擊JavaProject,輸入工程名,點擊finish;

2、在新建的工程里新建一個類:右鍵工程,點擊New,再點擊Class,輸入類名,點擊finish;

3、把寫好的java文件的代碼復(fù)制到新建的類中;

4、右鍵新建的類文件,點擊RunAs,再點擊JavaApplication即可運行Java文件。

需要注意的是:java文件要成功運行,前提是要有主方法(main)的存在,沒有主方法沒辦法運行java程序。

網(wǎng)上下載的java代碼怎么在eclipse里運行阿?

網(wǎng)上下載的java代碼在eclipse里運行方法:

1.打開eclipse,點擊項目的空白處,選擇import;

2.選擇Existing Project into Workspace,點擊next,找到下載的java代碼,導(dǎo)入到eclipse中;

3.導(dǎo)入成功之后,選擇項目,鼠標(biāo)右鍵,選擇run as,選擇一個運行方式,然后運行即可。

Java中文件下載該怎么寫代碼求高手指導(dǎo)

if (upfile.exists()) {

bytes = FileUtils.readFileToByteArray(upfile);

response.setContentType("application/x-download");

String agent = request.getHeader("USER-AGENT");//用戶代理

// 防止中文文件名亂碼

if (null != agent -1 != agent.indexOf("MSIE")) {

String codedfilename = StringUtils.replace(URLEncoder.encode(fileName, "UTF-8"), "+", "%20");

response.setHeader("Content-Disposition", "attachment;filename=" + codedfilename);

} else if (null != agent -1 != agent.indexOf("Mozilla")) {

String codedfilename = MimeUtility.encodeText(fileName, "UTF-8", "B");

response.setHeader("Content-Disposition", "attachment;filename=" + codedfilename);

} else {

response.setHeader("Content-Disposition", "attachment;filename=" + fileName);

}

response.setContentLength(bytes.length);

response.getOutputStream().write(bytes);

}

java下載方面的代碼

你的這段代碼有兩處讓人疑惑。其一、File()這個構(gòu)造函數(shù),自已查下API

其二、FileOutputStream,F(xiàn)ileOutputStream(String name)創(chuàng)建一個向具有指定名稱的文件中寫入數(shù)據(jù)的輸出文件流。它只是創(chuàng)建了一個輸出流,其中沒有具體的值,那么這個值來自哪呢,其就來自于你的輸入流。其中FileOutputStream()中只是創(chuàng)建了一個字節(jié)輸出流,其只能接受字節(jié)流的輸出,所以它還需要與DataOutputStream()的配合才能完成輸出,具體用法你可以查API

我在網(wǎng)上下載了一些java游戲程序代碼,請問如何在電腦上運行

把所有的文件編譯成類文件.class

(用javac

文件名.java

編譯)

,

然后找到游戲代碼的入口文件,java

文件名

運行,就完事了當(dāng)然你得確保這是一個能在命令行下運行的代碼


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