[一百分求解答]实际的情况下java如何操作数据库？

楼主在自学JAVA ing?
1.传统的原始开发模式
2.MVC开发模式：
SSH(Spring+stauts+hibernate)/SSI(Spring+stauts+ibatis)二种主流集成框架方式: 楼主所说的通过工具生成实体bean，就是hibernate框架做的事，每张表映射生成一个实体bean，项目层次：
分action层->service层->dao层 action是: 响应前台事件，取得前台封装过来的数据; service层：业务逻辑层; dao层：写SQL或HQL，调用数据连接类的CRUD方法和数据库交互;PS：我写了个大概，发现要写的东西实在太多了····楼主可以通过我写的关键字去找资料了解下，比我说来的好

可以使用BeanUtils将取出的数据封装到对应的javabean

我们用的JDNI啊，直接改下配置文件就行了

我们现在做的项目中，已经很少使用hibernate,就连strust都没用。
直接用springMVC+springJDBC，
用spring的jdbc就可以实现实体类的绑定，
至于实体类，楼主已经有工具生成，那就省事了，
直接用spring的JDBC即可，举一个crud的例子：
就比如实体类 Bean,,
查询(根据Id查询)：public Bean getBean(Integer id) {
StringBuilder selectBuilder = new StringBuilder();
selectBuilder.append(" SELECT * from xxx where id=?");
return new SimpleJdbcTemplate().getSimpleJdbcTemplate().queryForObject(selectBuilder.toString(), new ParameterizedRowMapper<Bean>() { public Bean mapRow(ResultSet rs, int rowNum)
throws SQLException {
Bean bean = new Bean ();
bean.setId(rs.getInt("id"));
bean.xxx(rs.getString("xxx"));
//...设置各个需要存入实体的值
return bean;
}
}, id);
}

顶楼上的beanUtils apache commons jar包内非常实用的工具蹭个分

一般用ORM框架可以减少你写sql的麻烦。比如morphia，直接写pojo对象，对象属性设置上，调用对象的save方法即可保存到数据库。还有你这零件的字段这么长？？是否可以优化成多个表关联呢？

多谢。1条数据，或是几条数据，可以生成一个bean。那如果一下找出来几十万条数据，也是要挨个生成bean么？

多谢。1条数据，或是几条数据，可以生成一个bean。那如果一下找出来几十万条数据，也是要挨个生成bean么？

楼主，查几十万条数据那也只是交给了数据库去做，我们可以考虑加上分页，每次只找出10条，20条，或者50条等等，但是，如果是涉及到导出，可以另做一个直接用jdbc的方式进行查询，跳过bean绑定。

多谢。1条数据，或是几条数据，可以生成一个bean。那如果一下找出来几十万条数据，也是要挨个生成bean么？

楼主，查几十万条数据那也只是交给了数据库去做，我们可以考虑加上分页，每次只找出10条，20条，或者50条等等，但是，如果是涉及到导出，可以另做一个直接用jdbc的方式进行查询，跳过bean绑定。
明白了，多谢了

给LZ提供一些连接吧，这些都是挺不错的！
http://blog.csdn.net/xiehuan_uestc/article/details/7969321
http://www.cnblogs.com/Caceolod/articles/1280258.html
http://blog.csdn.net/csh624366188/article/details/7305672
http://www.cnblogs.com/baiweiguo/archive/2013/02/21/2920638.html其实这样的连接还有很多，而且总结的都挺全面的，我只是来蹭分的

给楼主我的生成bean代码:
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;import javax.sql.DataSource;import org.springframework.jdbc.datasource.DataSourceUtils;import com.wasion.framework.service.ServiceLocator;/**
* 数据库表转换成javaBean对象小工具,
* bean属性按原始数据库字段经过去掉下划线,并大写处理首字母等等.
*
*/
public class MyEntityUtils {
private String tablename = "";
private String[] colnames;
private String[] colTypes;
private int[] colSizes; // 列名大小
private int[] colScale; // 列名小数精度
private boolean importUtil = false; // 导入包java.util.*
private boolean importSql = false; // 包java.sql.*
private boolean importMath = false; // 包java.sql.*
private boolean useObjectType = false; // bean类中使用基本类型还是对象类型 /**
* @param args
*/
public void tableToEntity(String tName) {
tablename = tName;
//数据连Connection获取,自己想办法就行.
DataSource ds = (DataSource) ServiceLocator.getService("dataSource");
Connection conn = DataSourceUtils.getConnection(ds); // 得到数据库连接
String strsql = "SELECT * FROM " + tablename;//+" WHERE ROWNUM=1";
try {
System.out.println(strsql);
PreparedStatement pstmt = conn.prepareStatement(strsql);
pstmt.executeQuery();
ResultSetMetaData rsmd = pstmt.getMetaData();
int size = rsmd.getColumnCount(); // 共有多少列
colnames = new String[size];
colTypes = new String[size];
colSizes = new int[size];
colScale = new int[size];
for (int i = 0; i < rsmd.getColumnCount(); i++) {
rsmd.getCatalogName(i + 1);
colnames[i] = rsmd.getColumnName(i + 1).toLowerCase();
colTypes[i] = rsmd.getColumnTypeName(i + 1).toLowerCase();
colScale[i] = rsmd.getScale(i + 1);
System.out.println(rsmd.getCatalogName(i+1));
if ("datetime".equals(colTypes[i])) {
importUtil = true;
}
if ("image".equals(colTypes[i]) || "text".equals(colTypes[i])) {
importSql = true;
}
if(colScale[i]>0){
importMath = true;
}
colSizes[i] = rsmd.getPrecision(i + 1);
}
String content = parse(colnames, colTypes, colSizes);
try {
FileWriter fw = new FileWriter(initcap(tablename) + ".java");
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DataSourceUtils.releaseConnection(conn, ds);
}
}

/**
* 解析处理(生成实体类主体代码)
*/
private String parse(String[] colNames, String[] colTypes, int[] colSizes) {
StringBuffer sb = new StringBuffer();
sb.append("\r\nimport java.io.Serializable;\r\n");
if (importUtil) {
sb.append("import java.util.Date;\r\n");
}
if (importSql) {
sb.append("import java.sql.*;\r\n\r\n");
}
if(importMath){
sb.append("import java.math.*;\r\n\r\n");
}
//表注释
processColnames(sb);
sb.append("public class " + initcap(tablename) + " implements Serializable {\r\n");
processAllAttrs(sb);
processAllMethod(sb);
sb.append("}\r\n");
System.out.println(sb.toString());
return sb.toString(); }
/**
* 处理列名,把空格下划线'_'去掉,同时把下划线后的首字母大写
* 要是整个列在3个字符及以内,则去掉'_'后,不把"_"后首字母大写.
* 同时把数据库列名,列类型写到注释中以便查看,
* @param sb
*/
private void processColnames(StringBuffer sb) {
sb.append("\r\n/** " + tablename + "\r\n");
String colsiz="";
String colsca="";
for (int i = 0; i < colnames.length; i++) {
colsiz = colSizes[i]<=0? "" : (colScale[i]<=0? "("+colSizes[i]+")" : "("+colSizes[i]+","+colScale[i]+")");
sb.append("\t" + colnames[i].toUpperCase() +" "+colTypes[i].toUpperCase()+ colsiz+"\r\n");
char[] ch = colnames[i].toCharArray();
char c ='a';
if(ch.length>3){
for(int j=0;j <ch.length; j++){
c = ch[j];
if(c == '_'){
if (ch[j+1]>= 'a' && ch[j+1] <= 'z') {
ch[j+1]=(char) (ch[j+1]-32);
}
}
}
}
String str = new String(ch);
colnames[i] = str.replaceAll("_", "");
}
sb.append("*/\r\n");
}
/**
* 生成所有的方法
*
* @param sb
*/
private void processAllMethod(StringBuffer sb) {
for (int i = 0; i < colnames.length; i++) {
sb.append("\tpublic void set" + initcap(colnames[i]) + "("
+ oracleSqlType2JavaType(colTypes[i],colScale[i],colSizes[i]) + " " + colnames[i]
+ "){\r\n");
sb.append("\t\tthis." + colnames[i] + "=" + colnames[i] + ";\r\n");
sb.append("\t}\r\n"); sb.append("\tpublic " + oracleSqlType2JavaType(colTypes[i],colScale[i],colSizes[i]) + " get"
+ initcap(colnames[i]) + "(){\r\n");
sb.append("\t\treturn " + colnames[i] + ";\r\n");
sb.append("\t}\r\n");
}
} /**
* 解析输出属性
*
* @return
*/
private void processAllAttrs(StringBuffer sb) {
sb.append("\tprivate static final long serialVersionUID = 1L;\r\n");
for (int i = 0; i < colnames.length; i++) {
sb.append("\tprivate " + oracleSqlType2JavaType(colTypes[i],colScale[i],colSizes[i]) + " "
+ colnames[i] + ";\r\n");
}
sb.append("\r\n");
} /**
* 把输入字符串的首字母改成大写
* @param str
* @return
*/
private String initcap(String str) {
char[] ch = str.toCharArray();
if (ch[0] >= 'a' && ch[0] <= 'z') {
ch[0] = (char) (ch[0] - 32);
}
return new String(ch);
} /**
* Oracle
* @param sqlType
* @param scale
* @return
*/
private String oracleSqlType2JavaType(String sqlType, int scale,int size) {
if (sqlType.equals("integer")) {
return "Integer";
} else if (sqlType.equals("long")) {
return "Long";
} else if (sqlType.equals("float")) {
return "BigDecimal";
} else if (sqlType.equals("double precision")) {
return "BigDecimal";
} else if (sqlType.equals("number")
||sqlType.equals("decimal")
|| sqlType.equals("numeric")
|| sqlType.equals("real")) {
return scale==0? (size<10? "Integer" : "Long") : "BigDecimal";
}else if (sqlType.equals("varchar")
|| sqlType.equals("varchar2")
|| sqlType.equals("char")
|| sqlType.equals("nvarchar")
|| sqlType.equals("nchar")) {
return "String";
} else if (sqlType.equals("datetime")
|| sqlType.equals("date")
|| sqlType.equals("timestamp")) {
return "Date";
}
return null;
} /**
* @param args
*/
public static void main(String[] args) {
MyEntityUtils t = new MyEntityUtils();
t.tableToEntity("TABLE_NAME");
}}

我还有一次生成所有代码的程序,
生成 bean
生成 service接口,service实现
生成 dao接口,dao实现自动实现 1增加,2删除,3修改,4按主键查询,5按给定的where条件查询,
6批理增加,7批删除,8批修改, 9批修改或批增加.
9大方法,
不过我只能提示楼主,多写代码,程序员就是写代码的,这些要自己去做.

想问一下大家,难道大家在 jdbc查数据时填充bean时都是手工写的代码?
天拉, insert, select, update 那个眼都看花!! 这个做个工具就行了代码全部自动生成,
这都是做一次永远使用的代码, 程序员重要是写业务逻辑代码,数据库的代码都应当不要写,或者尽量少写.

哦，这样啊，请问有什么现成的工具么？我学习学习。我以前是用PB的，从来没有写过sql语句，用了java，还以为全要自己写

我创建一个表,生成样本代码给你看, 上面生成bean自己扩展就能做到,呵呵.

----===============================
----建一个表
----===============================
CREATE TABLE MY_TABLE (
MYID                    NUMBER(10)                        NOT NULL,
MYTYPE                  NUMBER(6)                         NOT NULL,
  MYNAME                  VARCHAR2(32),
  MYDATE                  DATE,
REMARK                  VARCHAR2(64) ,
CONSTRAINT MY_TABLE PRIMARY KEY (MYID)
);

多谢。bean我已经能够生成，请问能不能给个例子，我学学doa如何生成？谢谢。

dao生成的代码好长,我也是在bean工具上做的, 我把生成的代码给你看,以便你开始可以用java开发数据库,
并且这是成熟的代码, 对了生成的模板都是 spring (集成spring很简单,网上很多),连接池用 apache的 dbcp包, 不要用什么 hibernate等其它 orm工具这种东西我在多年的工作中显示他们不适合大型项目,
我的项目中表都是上 10亿-100亿行数据, 我想你的项目也可以.生成样本第1段
import java.io.Serializable;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.*;
import java.math.*;import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.jdbc.datasource.DataSourceUtils;
import org.springframework.jdbc.support.JdbcUtils;//此工具自己做,或者自己手工改jdbc原始方法
import com.my.util.JdbcMyUtils;
/**
* MY_TABLE
* @author table tool 2013-12-30
*/
public class MyTableDaoJdbcImpl extends JdbcDaoSupport implements IMyTableDao {
private Log logger = LogFactory.getLog(this.getClass());
private JdbcMyUtils jtool = new JdbcMyUtils();
private String table = "MY_TABLE";
private String name = "MY_TABLE";
private final int BATCH_SIZE=500; /** findAll row */
public List<MyTable> findAll(String sqlExpression) {
if(sqlExpression==null) return null;
String tablename = null;
String strSql = null;
List<MyTable> list = new ArrayList<MyTable>();
tablename = table;
strSql =" SELECT "+this.getColumnString()+" FROM "+ tablename+" "+sqlExpression;
//call Template
this.findEntityTemplate(list, strSql);
return list;
} /** findAll row */
public List<MyTable> findAll() {
String tablename = null;
String strSql = null;
List<MyTable> list = new ArrayList<MyTable>();
tablename = table;
strSql =" SELECT "+this.getColumnString()+" FROM "+ tablename;
//call Template
this.findEntityTemplate(list, strSql);
return list;
} /** isExist row */
public boolean isExist(Long arg0){
if(arg0==null) return false;
String tablename = null;
String strSql = null;
boolean boolReturn = false;
tablename = table;// + MonTableUtils.monthTable(dataMonth, table);
strSql =" SELECT COUNT(0) FROM "+ tablename+" WHERE ID="+arg0;
//TODO ADD WHERE CODE......
//call Template
int rows = this.updateSqlTemplate(strSql);
if(rows>0) boolReturn = true;
return boolReturn;
} /** read row */
public MyTable read(Long arg0) {
if(arg0==null) return null;
String tablename = null;
String strSql = null;
MyTable e = null;
tablename = table;
strSql = "SELECT "+this.getColumnString()+" FROM "+tablename+" WHERE ID="+arg0;
//TODO ADD WHERE CODE......
//call Template
e = findEntityTemplate(strSql);
return e;
} /** create row */
public Long create(MyTable entity) {
if(entity==null) return null;
String tablename = null;
String strSql = null;
boolean boolReturn = false;
Long id=0L; //entity id;
tablename = table;
strSql =" INSERT INTO "+ tablename +" ("+this.getColumnString()+") "+
" VALUES(?,?,?,?,?)";
//call Template
boolReturn = insertEntityTemplate(entity, strSql);
return boolReturn ? id : null;
} /** delete row */
public boolean delete(MyTable entity) {
if(entity==null) return false;
String tablename = null;
String strSql = null;
boolean boolReturn = false;
tablename = table;
strSql =" DELETE "+ tablename +
" WHERE ID=1..... ";
//TODO ADD WHERE CODE......
//call Template
boolReturn = deleteEntityTemplate(entity, strSql);
return boolReturn;
} /** delete row */
public boolean delete(Long arg0) {
if(arg0==null) return false;
String tablename = null;
String strSql = null;
boolean boolReturn = false;
tablename = table;
strSql =" DELETE "+ tablename +
" WHERE ID=1..... ";
//TODO ADD WHERE CODE......
//call Template
int rows = this.updateSqlTemplate(strSql);
if(rows>=0) boolReturn = true;
return boolReturn;
} /** update row */
public boolean update(MyTable entity) {
if(entity==null) return false;
String tablename = null;
String strSql = null;
boolean boolReturn = false;
tablename = table;
strSql =" UPDATE "+ tablename +" SET"+
" MYID=?,MYTYPE=?,MYNAME=?,MYDATE=?,REMARK=?"+
" WHERE ID=1..... ";
//TODO ADD WHERE CODE......
//call Template
boolReturn = updateEntityTemplate(entity, strSql);
return boolReturn;
}

生成样本第2段
//-------------------------Template CODE-------------------------
/** insert,delete,update Sql Template
* UPDATE,DELETE RETURN >=0 SUCCEED, INSERT >0 SUCCEED;
* JDBC:0-NO DATA, 1-SUCCEED, -1-FAIL.
*/
private int updateSqlTemplate(String strSql){
if(strSql==null) return 0;
int rows=0;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
rows = this.getJdbcTemplate().update(strSql);
} catch (Exception ex) {
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
}
return rows;
} /** insert,delete,update Sql Template
* UPDATE,DELETE RETURN >=0 SUCCEED, INSERT >0 SUCCEED;
* JDBC:0-NO DATA, 1-SUCCEED, -1-FAIL.
*/
private int updateSqlTemplate(String strSql, Object[] args){
if(strSql==null) return 0;
int rows=0;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
rows = this.getJdbcTemplate().update(strSql, args);
} catch (Exception ex) {
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
}
return rows;
} /** insertTemplate */
private boolean insertEntityTemplate(MyTable entity, String strSql){
if(entity==null) return false;
boolean boolReturn = false;
Connection con = null;
PreparedStatement pst = null;
int rows=0;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
con = this.getConnection();
pst = con.prepareStatement(strSql);
this.processInsertRow(pst, entity);
rows = pst.executeUpdate();
// INSERT SQL RETURN >0 SUCCEED
if(rows>0) boolReturn = true;
} catch (Exception ex) {
boolReturn = false;
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
JdbcUtils.closeStatement(pst);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
return boolReturn;
} /** deleteTemplate */
private boolean deleteEntityTemplate(MyTable entity, String strSql){
if(entity==null) return false;
boolean boolReturn = false;
Connection con = null;
PreparedStatement pst = null;
int rows=0;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
con = this.getConnection();
pst = con.prepareStatement(strSql);
this.processDeleteRow(pst, entity);
rows = pst.executeUpdate();
// DELETE SQL RETURN >=0 SUCCEED (=0 NO DATA)
if(rows>=0) boolReturn = true;
} catch (Exception ex) {
boolReturn = false;
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
JdbcUtils.closeStatement(pst);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
return boolReturn;
} /** updataTemplate */
private boolean updateEntityTemplate(MyTable entity, String strSql){
if(entity==null) return false;
boolean boolReturn = false;
Connection con = null;
PreparedStatement pst = null;
int rows=0;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
con = this.getConnection();
pst = con.prepareStatement(strSql);
this.processUpdateRow(pst, entity);
rows = pst.executeUpdate();
// UPDATE SQL RETURN >=0 SUCCEED (=0 NO DATA)
if(rows>=0) boolReturn = true;
} catch (Exception ex) {
boolReturn = false;
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
JdbcUtils.closeStatement(pst);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
return boolReturn;
} /** findEntityTemplate one entity */
private MyTable findEntityTemplate(String strSql){
Connection con = null;
PreparedStatement pst = null;
ResultSet rs = null;
MyTable e=null;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
con = this.getConnection();
pst = con.prepareStatement(strSql);
rs = pst.executeQuery();
e =this.processRow(rs);
} catch (Exception ex) {
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
JdbcUtils.closeStatement(pst);
JdbcUtils.closeResultSet(rs);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
return e;
} /** findEntityTemplate list entity */
private void findEntityTemplate(List<MyTable> listout, String strSql){
Connection con = null;
PreparedStatement pst = null;
ResultSet rs = null;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
con = this.getConnection();
pst = con.prepareStatement(strSql);
rs = pst.executeQuery();
this.processRow(listout, rs);
} catch (Exception ex) {
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
JdbcUtils.closeStatement(pst);
JdbcUtils.closeResultSet(rs);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
} /** insertBatchTemplate */
private boolean insertBatchTemplate(List<MyTable> entities, String strSql){
if(entities==null || entities.size()==0) return true;
boolean boolReturn = false;
Connection con = null;
PreparedStatement pst = null;
MyTable entity =null;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
con = this.getConnection();
con.setAutoCommit(false);
pst = con.prepareStatement(strSql);
int i=0;
for(int j=0; j<entities.size(); j++){
entity = entities.get(j);
this.processInsertRow(pst, entity);
pst.addBatch();
i++;
if(i >= BATCH_SIZE){
if(logger.isDebugEnabled()){
logger.debug("[正在批量发送数据]: "+i+" 行,BY "+name);
}
i=0;
pst.executeBatch();
pst.clearBatch();
con.commit();
}
}
//最后把不足行的数据提交
pst.executeBatch();
pst.clearBatch();
boolReturn = true;
if(logger.isDebugEnabled()){
logger.debug("[完成批量发送数据]: "+i+" 行,BY "+name);
}
} catch (Exception ex) {
boolReturn = false;
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
entity = null;
JdbcUtils.closeStatement(pst);
jtool.commit(con, boolReturn);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
return boolReturn;
} /** deleteBatchTemplate */
private boolean deleteBatchTemplate(List<MyTable> entities, String strSql){
if(entities==null || entities.size()==0) return true;
boolean boolReturn = false;
Connection con = null;
PreparedStatement pst = null;
MyTable entity =null;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
con = this.getConnection();
con.setAutoCommit(false);
pst = con.prepareStatement(strSql);
int i=0;
for(int j=0; j<entities.size(); j++){
entity = entities.get(j);
this.processDeleteRow(pst, entity);
pst.addBatch();
i++;
if(i >= BATCH_SIZE){
if(logger.isDebugEnabled()){
logger.debug("[正在批量发送数据]: "+i+" 行,BY "+name);
}
i=0;
pst.executeBatch();
pst.clearBatch();
con.commit();
}
}
//最后把不足行的数据提交
pst.executeBatch();
pst.clearBatch();
boolReturn = true;
if(logger.isDebugEnabled()){
logger.debug("[完成批量发送数据]: "+i+" 行,BY "+name);
}
} catch (Exception ex) {
boolReturn = false;
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
entity = null;
JdbcUtils.closeStatement(pst);
jtool.commit(con, boolReturn);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
return boolReturn;
}

生成样本第3段
/** updateBatchTemplate */
private boolean updateBatchTemplate(List<MyTable> entities, String strSql){
if(entities==null || entities.size()==0) return true;
boolean boolReturn = false;
Connection con = null;
PreparedStatement pst = null;
MyTable entity =null;
try {
if(logger.isDebugEnabled())
logger.debug(name+": "+strSql);
con = this.getConnection();
con.setAutoCommit(false);
pst = con.prepareStatement(strSql);
int i=0;
for(int j=0; j<entities.size(); j++){
entity = entities.get(j);
this.processUpdateRow(pst, entity);
pst.addBatch();
i++;
if(i >= BATCH_SIZE){
if(logger.isDebugEnabled()){
logger.debug("[正在批量发送数据]: "+i+" 行,BY "+name);
}
i=0;
pst.executeBatch();
pst.clearBatch();
con.commit();
}
}
//最后把不足行的数据提交
pst.executeBatch();
pst.clearBatch();
boolReturn = true;
if(logger.isDebugEnabled()){
logger.debug("[完成批量发送数据]: "+i+" 行,BY "+name);
}
} catch (Exception ex) {
boolReturn = false;
logger.error("[execute sql error]: "+strSql, ex);
} finally {
strSql = null;
entity = null;
JdbcUtils.closeStatement(pst);
jtool.commit(con, boolReturn);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
return boolReturn;
} /** updateOrInsertBatchTemplate */
private boolean updateOrInsertBatchTemplate(List<MyTable> entities, String strUpSql, String strInSql){
if(entities==null || entities.size()==0) return true;
boolean boolReturn = false;
Connection con = null;
PreparedStatement pstup = null;
PreparedStatement pstin = null;
MyTable entity =null;
List<MyTable> failedData =new ArrayList<MyTable>();
int isuporin =0;
int failedRow =0;
int insertRow =0;
int updateRow =0;
int forRow =0;
try {
//update
if(logger.isDebugEnabled())
logger.debug(name+": "+strUpSql);
con = this.getConnection();
con.setAutoCommit(false);
pstup = con.prepareStatement(strUpSql);
int i=0;
forRow = entities.size();
for(int j=0; j<forRow; j++){
entity = entities.get(j);
this.processUpdateRow(pstup, entity);
pstup.addBatch();
i++;
if(i >= BATCH_SIZE || (j+1)==forRow){
if(logger.isDebugEnabled()){
logger.debug("[正在批量发送数据]: "+i+" 行,BY "+name);
}
i=0;
int[] ri =pstup.executeBatch();
pstup.clearBatch();
con.commit();
//记录失败的数据.
for(int x=0;x<ri.length; x++){
if(ri[x]==Statement.EXECUTE_FAILED || ri[x]<-3){
failedData.add(entities.get(x));
}
}
}
}
//insert
if(failedData.size()>0){
isuporin =1;
if(logger.isDebugEnabled())
logger.debug(name+": "+strInSql);
pstin = con.prepareStatement(strInSql);
i=0;
forRow = failedData.size();
for(int j=0; j<forRow; j++){
entity = failedData.get(j);
this.processInsertRow(pstin, entity);
pstin.addBatch();
i++;
if(i >= BATCH_SIZE || (j+1)==forRow){
if(logger.isDebugEnabled()){
logger.debug("[正在批量发送数据]: "+i+" 行,BY "+name);
}
i=0;
int[] ri =pstin.executeBatch();
pstin.clearBatch();
con.commit();
//记录失败的数据.
for(int x=0;x<ri.length; x++){
if(ri[x]==Statement.EXECUTE_FAILED || ri[x]<-3){
failedRow = failedRow + 1;
}
}
}
insertRow = failedData.size() - failedRow;
}
}
updateRow = entities.size() -failedData.size();
boolReturn = true;
} catch (Exception ex) {
boolReturn = false;
logger.error("[execute sql error]: "+(isuporin==0? strUpSql : strInSql), ex);
} finally {
if(logger.isDebugEnabled())
logger.info("[完成批量发送数据]: 总行"+entities.size()+", 更新"+updateRow+", 插入"+insertRow+", 失败"+failedRow+", BY "+name);
entity = null;
failedData.clear();
failedData =null;
JdbcUtils.closeStatement(pstup);
JdbcUtils.closeStatement(pstin);
jtool.commit(con, boolReturn);
DataSourceUtils.releaseConnection(con, this.getDataSource());
}
return boolReturn;
} /** Insert row */
private void processInsertRow(PreparedStatement pst, MyTable e) throws SQLException {
int r = 1;
jtool.setLong(pst, r++, e.getMyid());
jtool.setInt(pst, r++, e.getMytype());
jtool.setString(pst, r++, e.getMyname());
jtool.setTimestamp(pst, r++, new Timestamp(e.getMydate().getTime()));
jtool.setString(pst, r++, e.getRe());
} /** Delete row */
private void processDeleteRow(PreparedStatement pst, MyTable e) throws SQLException {
int r = 1;
//DEMO CODE: jtool.setLong(pst, r++, e.getId());
//TODO ADD DELETE SQL WHERE CODE...
} /** Update row */
private void processUpdateRow(PreparedStatement pst, MyTable e) throws SQLException {
int r = 1;
jtool.setLong(pst, r++, e.getMyid());
jtool.setInt(pst, r++, e.getMytype());
jtool.setString(pst, r++, e.getMyname());
jtool.setTimestamp(pst, r++, new Timestamp(e.getMydate().getTime()));
jtool.setString(pst, r++, e.getRe());
//WHERE
//TODO ADD UPDATE SQL WHERE CODE...
} /** process 1 row */
private MyTable processRow(ResultSet rs) throws SQLException {
int r = 1;
MyTable e = null;
while (rs.next()) {
r = 1;
e = new MyTable();
e.setMyid(jtool.getLong(rs, r++));
e.setMytype(jtool.getInt(rs, r++));
e.setMyname(jtool.getStrTrim(rs, r++));
e.setMydate(jtool.getTimestamp(rs, r++));
e.setRe(jtool.getStrTrim(rs, r++));
break;
}
return e;
} /** process n row */
private void processRow(List<MyTable> list, ResultSet rs) throws SQLException {
int r = 1;
MyTable e = null;
while (rs.next()) {
r = 1;
e = new MyTable();
e.setMyid(jtool.getLong(rs, r++));
e.setMytype(jtool.getInt(rs, r++));
e.setMyname(jtool.getStrTrim(rs, r++));
e.setMydate(jtool.getTimestamp(rs, r++));
e.setRe(jtool.getStrTrim(rs, r++));
list.add(e);
}
} /** 5 Column */
private String getColumnString() {
String sqlSql =" MYID,"+
"MYTYPE,"+
"MYNAME,"+
"MYDATE,"+
"REMARK ";
return sqlSql;
}}
MyTableDaoJdbcImpl 实现代码结束, 注释中有部分条件要修改一下,因为每个表的主键不同,删除条件也不一样.

调试易

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