尝试将新对象插入Oracle表时获取ArrayList<ModelPrice> modelPriceArrayList = new ArrayList<ModelPrice>();
RecyclerView rv;
AdapterPrice adapterClass;
LinearLayoutManager llm;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_static_data);
rv = (RecyclerView) findViewById(R.id.rv);
fill_data();
rv.setHasFixedSize(true);
llm = new LinearLayoutManager(static_data.this);
rv.setLayoutManager(llm);
adapterClass = new AdapterPrice(static_data.this, modelPriceArrayList);
rv.setAdapter(adapterClass);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.setting_data, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.a:
Collections.sort(modelPriceArrayList, new Comparator<ModelPrice>() {
public int compare(ModelPrice p1, ModelPrice p2) {
return (p1.getName()).compareTo(p2.getName());
}
});
rv.setHasFixedSize(true);
llm = new LinearLayoutManager(static_data.this);
rv.setLayoutManager(llm);
adapterClass = new AdapterPrice(static_data.this, modelPriceArrayList);
rv.setAdapter(adapterClass);
return true;
case R.id.z:
Collections.sort(modelPriceArrayList, new Comparator<ModelPrice>() {
public int compare(ModelPrice p1, ModelPrice p2) {
return p2.getName().compareTo(p1.getName());
}
});
rv.setHasFixedSize(true);
llm = new LinearLayoutManager(static_data.this);
rv.setLayoutManager(llm);
adapterClass = new AdapterPrice(static_data.this, modelPriceArrayList);
rv.setAdapter(adapterClass);
return true;
case R.id.l:
Collections.sort(modelPriceArrayList, new Comparator<ModelPrice>() {
@Override
public int compare(ModelPrice p1, ModelPrice p2) {
return (int) p1.getPrice() - p2.getPrice();
}
});
rv.setHasFixedSize(true);
llm = new LinearLayoutManager(static_data.this);
rv.setLayoutManager(llm);
adapterClass = new AdapterPrice(static_data.this, modelPriceArrayList);
rv.setAdapter(adapterClass);
return true;
case R.id.h:
Collections.sort(modelPriceArrayList, new Comparator<ModelPrice>() {
@Override
public int compare(ModelPrice p1, ModelPrice p2) {
return (int) p2.getPrice() - p1.getPrice();
}
});
rv.setHasFixedSize(true);
llm = new LinearLayoutManager(static_data.this);
rv.setLayoutManager(llm);
adapterClass = new AdapterPrice(static_data.this, modelPriceArrayList);
rv.setAdapter(adapterClass);
return true;
case R.id.New:
final Dialog dialog = new Dialog(static_data.this);
dialog.setContentView(R.layout.custom_dialog);
dialog.setTitle("Blah Blah...");
final EditText textViewcolor = (EditText) dialog.findViewById(R.id.color_name1);
final EditText textViewprice = (EditText) dialog.findViewById(R.id.color_price1);
Button btnok = (Button) dialog.findViewById(R.id.btnOk);
Button btncancle = (Button) dialog.findViewById(R.id.btncancle);
btnok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String name = String.valueOf(textViewcolor.getText());
String price = String.valueOf(textViewprice.getText());
modelPriceArrayList.add(new ModelPrice(name, Integer.parseInt(price)));
adapterClass.notifyItemChanged(0);
dialog.dismiss();
}
});
btncancle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
dialog.dismiss();
}
});
dialog.show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
void fill_data() {
modelPriceArrayList.add(new ModelPrice("Red", 25));
modelPriceArrayList.add(new ModelPrice("white", 215));
modelPriceArrayList.add(new ModelPrice("Yello", 245));
modelPriceArrayList.add(new ModelPrice("Balck", 245));
modelPriceArrayList.add(new ModelPrice("DarkViolet", 275));
modelPriceArrayList.add(new ModelPrice("DeepPink", 225));
modelPriceArrayList.add(new ModelPrice("Fuchsia", 235));
modelPriceArrayList.add(new ModelPrice("Gold", 425));
modelPriceArrayList.add(new ModelPrice("Gray", 25));
modelPriceArrayList.add(new ModelPrice("HotPink", 725));
modelPriceArrayList.add(new ModelPrice("IndianRed", 525));
modelPriceArrayList.add(new ModelPrice("Indigo", 225));
modelPriceArrayList.add(new ModelPrice("Gainsboro", 3325));
modelPriceArrayList.add(new ModelPrice("Brown", 425));
modelPriceArrayList.add(new ModelPrice("Chartreuse", 725));
modelPriceArrayList.add(new ModelPrice("DarkCyan", 5));
modelPriceArrayList.add(new ModelPrice("DarkGrey", 225));
modelPriceArrayList.add(new ModelPrice("DarkSlateBlue", 285));
modelPriceArrayList.add(new ModelPrice("MintCream", 275));
modelPriceArrayList.add(new ModelPrice("PaleVioletRed", 825));
modelPriceArrayList.add(new ModelPrice("PaleVioletRed", 625));
}
。该表确实有一个序列，每个条目都会自动递增。
我已经坚持了几个小时，在对这个问题和其他文章做出类似的回答后，我仍然坚持。
我的课程：
WHERE route_ou = 2
AND ( (@l_s_query IS NOT NULL AND route_query = @l_s_query ) OR
@l_s_query IS NULL )
AND lang_id = 1
班上的DAO：
java.sql.SQLSyntaxErrorException: ORA-02289: sequence does not exist序列的DDL片段：
import java.sql.Timestamp;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import org.springframework.stereotype.Component;
@Entity
@Table(name = "MY_SCHEMA.MY_TABLE")
@Component
public class SomeClass {
@Id
@SequenceGenerator(name = "MY_SEQ", sequenceName = "MY_SEQ", allocationSize = 1)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "MY_SEQ")
@Column(name = "MY_ID")
private Integer myId;
@Column(name = "MY_TS")
private Timestamp ts;
@Column(name = "MY_PARAM")
private String myParameters;
@Column(name = "ANOTHER_TS")
private Timestamp anotherTimestamp;
// empty constructor and getters/setters
}
hibernate.cfg.xml中：
import java.io.Serializable;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.Properties;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.springframework.stereotype.Component;
import mypackage.mysubpackage.SomeClass;
@Component
public class SomeClassDAO {
private Session currentSession;
private Transaction currentTransaction;
private static SessionFactory getSessionFactory() {
Configuration configuration = new Configuration().configure();
configuration.addAnnotatedClass(SomeClass.class);
StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties());
SessionFactory factory = configuration.buildSessionFactory(builder.build());
return factory;
}
public Session openCurrentSession() {
currentSession = getSessionFactory().openSession();
return currentSession;
}
public Session openCurrentSessionWithTransaction() {
currentSession = getSessionFactory().openSession();
currentTransaction = currentSession.beginTransaction();
return currentSession;
}
public void closeCurrentSession() {
currentSession.close();
}
public void closeCurrentSessionWithTransaction() {
currentTransaction.commit();
currentSession.close();
}
public Session getCurrentSession() {
return currentSession;
}
public void setCurrentSession(Session currentSession) {
this.currentSession = currentSession;
}
// post
public void insertNew() {
SomeClass obj = new SomeClass();
obj.setParameters("abc");
getCurrentSession().save(obj);
}
}
mvc-dispatchet-servlet.xml片段：
begin
if inserting then
if :NEW."MY_ID" is null then
select MY_SEQ.nextval into :NEW."MY_ID" from dual;
end if;
end if;
end;
答案 0 :(得分：2)