本文目录一览:
- 1、sap java 可以开发什么
- 2、JAVA调用SAP报错信息,各位帮忙看看什么原因
- 3、JAVA怎么才能调用SAP的函数?谢谢
- 4、sap和java哪个前景待遇好?
- 5、做SAP开发怎么样?前途好么?我现在做java开发,目前想跳槽,现在有家公司让我去做SAP开发,要不要去呢
- 6、java和sap 如何抉择
sap java 可以开发什么
1.既然想不误开发这条路,又想往SAP方向发展.那你还是先熟练掌握JAVA这样的OO语言,然后学会ABAP吧.虽然SAP业内非常非常的不看重编程能力...
2.IT技术的书籍是无穷尽的...你既然现在接触不到SAP,看了真白看.还不如稳扎稳打把现在的技术练扎实.就算以后没机会转SAP,JAVA也一点都不赖.(如果什么重构预够敏捷设计模式算法你都懂,再加上点工作经验...真不必羡慕SAP)
3.当然有帮助,且不说SAP现在就有些前端是用JAVA开发的,ABAP本身也是从JAVA演化而来的.要熟悉JAVA,转为ABAPER轻而易举.
4.SAP培训费坑爹.课程好像也有点坑爹...似乎可以自学考证,但是你考哪个证呢...SAP是一个模块一个证...
5.投简历咯~如果你JAVA真的还可以,好的公司进去不容易,进个一般的公司写写ABAP还是轻而易举的.或者你还没毕业就去校园招聘拼人品去.
JAVA调用SAP报错信息,各位帮忙看看什么原因
JAVA调用SAP报错叫做JCo二次部署异常。 JCo的原理是通过加载本地驱动实现的,因此在web项目里面在不重启server的情况下是无法重复加载sapjco3.dll驱动的,由于JCo是通过JNI实现的,即加载sapjco3.dll实现Java与SAP的通信,而JNI加载的class没办法被classloader卸载导致不能重复
将sapjco3.dll加到web容器(resin)的lib中,而将项目的WEB-INF\lib去掉,
JAVA怎么才能调用SAP的函数?谢谢
给你举个例子吧,如下:
1:Sap 域模型
package abc;
public class SapSystem implements java.lang.Cloneable {
private final String name;
private final String host;
private final String client;
private final String systemNumber;
private final String user;
private final String password;
private final String language ="en"; // English will be used as login language
/**
* Constructor, Login language is assumed to be English
* @param name
* @param client
* @param user
* @param password
* @param host
* @param systemNumber
*/
public SapSystem(String name, String host, String client
, String systemNumber, String user, String password) {
this.name = name;
this.client = client;
this.user = user;
this.password = password;
this.host = host;
this.systemNumber = systemNumber;
}
public String getName() {
return name;
}
public String getClient() {
return client;
}
public String getUser() {
return user;
}
public String getPassword() {
return password;
}
public String getLanguage() {
return language;
}
public String getHost() {
return host;
}
public String getSystemNumber() {
return systemNumber;
}
@Override
public String toString() {
return "Client " + client + " User " + user + " PW " + password
+ " Language " + language + " Host " + host + " SysID "
+ systemNumber;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((client == null) ? 0 : client.hashCode());
result = prime * result + ((host == null) ? 0 : host.hashCode());
result = prime * result
+ ((language == null) ? 0 : language.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result
+ ((password == null) ? 0 : password.hashCode());
result = prime * result
+ ((systemNumber == null) ? 0 : systemNumber.hashCode());
result = prime * result + ((user == null) ? 0 : user.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
SapSystem other = (SapSystem) obj;
if (client == null) {
if (other.client != null)
return false;
} else if (!client.equals(other.client))
return false;
if (host == null) {
if (other.host != null)
return false;
} else if (!host.equals(other.host))
return false;
if (language == null) {
if (other.language != null)
return false;
} else if (!language.equals(other.language))
return false;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
if (password == null) {
if (other.password != null)
return false;
} else if (!password.equals(other.password))
return false;
if (systemNumber == null) {
if (other.systemNumber != null)
return false;
} else if (!systemNumber.equals(other.systemNumber))
return false;
if (user == null) {
if (other.user != null)
return false;
} else if (!user.equals(other.user))
return false;
return true;
}
@Override
public Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
return null;
}
}
=====================================
2:建立连接
import java.util.Properties;
import com.sap.conn.jco.ext.DestinationDataEventListener;
import com.sap.conn.jco.ext.DestinationDataProvider;
import de.vogella.sap.system.model.SapSystem;
/**
* Represents the destination to a specific SAP system.
* The destination is maintained via a property file
*
*/
public class MyDestinationDataProvider implements DestinationDataProvider {
static String SAP_SERVER = "SAP_SERVER";
private final Properties ABAP_AS_properties;
public MyDestinationDataProvider(SapSystem system) {
Properties properties = new Properties();
properties.setProperty(DestinationDataProvider.JCO_ASHOST, system
.getHost());
properties.setProperty(DestinationDataProvider.JCO_SYSNR, system
.getSystemNumber());
properties.setProperty(DestinationDataProvider.JCO_CLIENT, system
.getClient());
properties.setProperty(DestinationDataProvider.JCO_USER, system
.getUser());
properties.setProperty(DestinationDataProvider.JCO_PASSWD, system
.getPassword());
ABAP_AS_properties = properties;
}
@Override
public Properties getDestinationProperties(String system) {
return ABAP_AS_properties;
}
@Override
public void setDestinationDataEventListener(
DestinationDataEventListener eventListener) {
}
@Override
public boolean supportsEvents() {
return false;
}
}
==================
import com.sap.conn.jco.JCoContext;
import com.sap.conn.jco.JCoDestination;
import com.sap.conn.jco.JCoDestinationManager;
import com.sap.conn.jco.JCoException;
import com.sap.conn.jco.JCoFunction;
import com.sap.conn.jco.JCoRepository;
import de.vogella.sap.system.model.SapSystem;
/**
* Connection allows to get and execute SAP functions. The constructor expect a
* SapSystem and will save the connection data to a file. The connection will
* also be automatically be established.
*/
public class Connection {
static String SAP_SERVER = "SAP_SERVER";
private JCoRepository repos;
private JCoDestination dest;
public Connection(SapSystem system) {
MyDestinationDataProvider myProvider = new MyDestinationDataProvider(system);
com.sap.conn.jco.ext.Environment
.registerDestinationDataProvider(myProvider);
try {
dest = JCoDestinationManager.getDestination(SAP_SERVER);
System.out.println("Attributes:");
System.out.println(dest.getAttributes());
repos = dest.getRepository();
} catch (JCoException e) {
throw new RuntimeException(e);
}
}
/**
* Method getFunction read a SAP Function and return it to the caller. The
* caller can then set parameters (import, export, tables) on this function
* and call later the method execute.
*
* getFunction translates the JCo checked exceptions into a non-checked
* exceptions
*/
public JCoFunction getFunction(String functionStr) {
JCoFunction function = null;
try {
function = repos.getFunction(functionStr);
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(
"Problem retrieving JCO.Function object.");
}
if (function == null) {
throw new RuntimeException("Not possible to receive function. ");
}
return function;
}
/**
* Method execute will call a function. The Caller of this function has
* already set all required parameters of the function
*
*/
public void execute(JCoFunction function) {
try {
JCoContext.begin(dest);
function.execute(dest);
} catch (JCoException e) {
e.printStackTrace();
} finally {
try {
JCoContext.end(dest);
} catch (JCoException e) {
e.printStackTrace();
}
}
}
}
======================
3:测试连接
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import com.sap.conn.jco.JCoFunction;
import com.sap.conn.jco.JCoTable;
import de.vogella.sap.rfc.core.connection.Connection;
import de.vogella.sap.system.model.SapSystem;
public class ConnectionTester {
static String SAP = "SAP_SERVER";
@Test
public void checkConnection() {
// SAP System
SapSystem system = new SapSystem("PFT", "pwdf6394.wdf.sap.corp", "600", "76", "mytester", "welcome");
Connection connect = new Connection(system);
JCoFunction function = connect.getFunction("BAPI_USER_GETLIST");
function.getImportParameterList().setValue("MAX_ROWS", 10);
connect.execute(function);
JCoTable table = function.getTableParameterList().getTable("USERLIST");
assertTrue("User Tabelle should not be empty", !table.isEmpty());
}
}
======================
4:简化JCo存取
import com.sap.conn.jco.JCoTable;
/**
* TableAdapter is used to simplify the reading of the values of the Jco tables
*/
public class TableAdapterReader {
protected JCoTable table;
public TableAdapterReader(JCoTable table) {
this.table = table;
}
public String get(String s) {
return table.getValue(s).toString();
}
public Boolean getBoolean(String s) {
String value = table.getValue(s).toString();
return value.equals("X");
}
public String getMessage() {
return table.getString("MESSAGE");
}
public int size() {
return table.getNumRows();
}
public void next() {
table.nextRow();
}
}
5:最后测试
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import com.sap.conn.jco.JCoFunction;
import com.sap.conn.jco.JCoTable;
import de.vogella.sap.rfc.core.connection.Connection;
import de.vogella.sap.rfc.helper.TableAdapterReader;
import de.vogella.sap.system.model.SapSystem;
public class TableAdapterTester {
@Test
public void checkConnection() {
// SAP System
SapSystem system = new SapSystem("PFT", "pwdf6394.wdf.sap.corp", "600",
"76", "mytester", "welcome");
Connection connect = new Connection(system);
JCoFunction function = connect.getFunction("BAPI_USER_GETLIST");
function.getImportParameterList().setValue("MAX_ROWS", 10);
connect.execute(function);
JCoTable table = function.getTableParameterList().getTable("USERLIST");
TableAdapterReader adapter = new TableAdapterReader(table);
System.out.println("Number of Users: " + adapter.size());
for (int i = 0; i adapter.size(); i++) {
// USERNAME is a column in the table "USERLIST"
String s = adapter.get("USERNAME");
assertNotNull(s);
assertTrue(s.length() 0);
System.out.println(s);
adapter.next();
}
assertTrue("User Tabelle should not be empty", !table.isEmpty());
}
}
sap和java哪个前景待遇好?
光从前景和待遇上来说,肯定是sap比java好的,毕竟java这种编程还是靠吃青春饭的,sap倒是越有经验越吃香。但是前提是你愿意且有能力做好,真的是看你个人的意愿和本事了。如果你选择sap的话,一个是从ABAP开发入手,这就需要一定的开发经验了,但是我不确定半年的java经验是否足够;另外一个就是做sap的其他业务模块,但是这个又需要业务方面的经验,你可以自己衡量一下,考虑一下从哪方面进入sap。如果你们公司正好有sap项目要上的话,那就是很好的学习机会,你可以跟着项目一起边做边学;如果你们公司已经上好sap的话,那你就要考虑去外面的培训机构学习了,关于培训机构现在外面很多了,你可以自己去比较,推荐一篇如何选择培训机构的博文给你吧~
做SAP开发怎么样?前途好么?我现在做java开发,目前想跳槽,现在有家公司让我去做SAP开发,要不要去呢
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java和sap 如何抉择
任何技术都有其应用领域,java和sap你只要能够踏踏实实走下去,每一条路都是光明的。评论xxx技术好不好 那是没有任何意义。就跟我当年学了3年的C++,后来由于工作需要转到java开发,从接触java到写项目代码也就三天不到的时间。虽然开始困难,但现在回过头想想,也没有什么。技术是死的,人是活的。不要让技术把你套的死死的。你现在有这种抉择问题,无非是感觉以前学的东西白费了,划不来,呵呵,其实你关注这个是不明智的,你的精力更多应该放在ERP的了解上,看看ERP是否能够让你感到值得去做。权衡下自己能不能在这个行业中有所作为。用什么技术从来都不是考虑的重点。