Oracle表生成JavaBean
package com.batch.tabletojava
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.util.ArrayList;
import java.util.List;
public class Table2JavaBean {
private static final String TAB = "\t";
private static final String LINE = "\r\n";
public static void main(String[] args) {
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = null;
String jdbcString = "jdbc:oracle:thin:@localhost:1521:xe";
conn = DriverManager.getConnection(jdbcString, "oracle", "oracle");
List<String> tableList = new ArrayList<String>();
tableList = getTableList(conn);
for(String s: tableList){
makeJavaBean(conn, s);
System.out.println(s);
}
}catch(Exception e){
e.printStackTrace();
}
}
private static void makeJavaBean( Connection conn ,String tableID) {
FileOutputStream fo = null;
DataOutputStream ds = null;
File file = new File("c:\\tableBean\\" + tableID + ".java");
String sql = "select * from " + tableID + " where 1<>1";
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
ResultSetMetaData md = rs.getMetaData();
String tableName = getTableName(conn, tableID);
int columnCount = md.getColumnCount();
tableID = tableID.substring(0, 1).toUpperCase()
+ tableID.substring(1);
StringBuffer buff = new StringBuffer();
buff.append("/*----------------------------------------------------------------------------------------");
buff.append(LINE);
buff.append("Program Name | " + tableID + ".java");
buff.append(LINE);
buff.append("Language | Java");
buff.append(LINE);
buff.append("Name | " + tableName + "类");
buff.append(LINE);
buff.append("Preparation person | XX.XXX (XXXXX) 2013/12/20");
buff.append(LINE);
buff.append("Note |");
buff.append(LINE);
buff.append("------------------------------------------------------------------------------------------");
buff.append(LINE);
buff.append("2013-12-20 | Original Source Release by XX.XXX (XXXX)");
buff.append(LINE);
buff.append("------------------------------------------------------------------------------------------*/");
buff.append(LINE);
buff.append("package com.batch.common;");
buff.append(LINE);
buff.append(" ");
buff.append(LINE);
buff.append("/**");
buff.append(LINE);
buff.append(" * " + tableName + "类.");
buff.append(LINE);
buff.append(" * ");
buff.append(LINE);
buff.append(" * @author XX.XXX");
buff.append(LINE);
buff.append(" */");
buff.append(LINE);
buff.append("public class " + tableID + " extends WWUMTCOMMON {");
buff.append(LINE);
for (int i = 1; i <= columnCount; i++) {
if("ZZ".equals(md.getColumnName(i).substring(0,2))){
continue;
}
// 取得字段注释
String columnComment = getColumnComment(conn, tableID, md.getColumnName(i));
String columnID = makeColumnID(md.getColumnName(i));
buff.append(TAB).append("/** "+columnComment+". */");
buff.append(LINE);
buff.append(TAB);
buff.append("private "
+ Table2JavaBean.toType(md.getColumnTypeName(i)) + " "
+ columnID.substring(0,1).toLowerCase()
+ columnID.substring(1)+ ";");
buff.append(LINE);
}
for (int i = 1; i <= columnCount; i++) {
if("ZZ".equals(md.getColumnName(i).substring(0,2))){
continue;
}
// 取得字段注释
String columnComment = getColumnComment(conn, tableID, md.getColumnName(i));
buff.append(TAB);
String pojiType = Table2JavaBean
.toType(md.getColumnTypeName(i));
String columnName = makeColumnID(md.getColumnName(i));
columnName = columnName.substring(0, 1).toLowerCase()
+ columnName.substring(1);
String getName = null;
String setName = null;
if (columnName.length() > 1) {
// get
buff.append(LINE).append(TAB).append("/** ");
buff.append(LINE).append(TAB).append(" * 获取" +columnComment+"。");
buff.append(LINE).append(TAB).append(" * @return "+columnName +" " + columnComment);
buff.append(LINE).append(TAB).append(" */");
getName = "public " + pojiType + " get"
+ columnName.substring(0, 1).toUpperCase()
+ columnName.substring(1) + "() {";
buff.append(LINE).append(TAB).append(getName);
buff.append(LINE).append(TAB).append(TAB);
buff.append("return " + columnName + ";");
buff.append(LINE).append(TAB).append("}");
buff.append(LINE);
// set
setName = "public void set"
+ columnName.substring(0, 1).toUpperCase()
+ columnName.substring(1) + "("
+ pojiType + " " + columnName + ") {";
buff.append(LINE).append(TAB).append("/** ");
buff.append(LINE).append(TAB).append(" * 设定"+ columnComment+"。 ");
buff.append(LINE).append(TAB).append(" * @param "+columnName +" " + columnComment);
buff.append(LINE).append(TAB).append(" */");
buff.append(LINE).append(TAB).append(setName);
buff.append(LINE).append(TAB).append(TAB);
buff.append("this." + columnName + " = " + columnName + ";");
buff.append(LINE).append(TAB).append("}");
buff.append(LINE);
}
}
buff.append("}").append(LINE);
fo = new FileOutputStream(file);
ds = new DataOutputStream(fo);
ds.write(buff.toString().getBytes());
}catch(Exception e){
e.printStackTrace();
} finally{
try{
if(ds != null){
ds.flush();
ds.close();
}
if(fo != null){
fo.close();
}
if(rs != null){
rs.close();
}
if(ps != null){
ps.close();
}
}catch (Exception e){
e.printStackTrace();
}
}
}
private static String makeColumnID(String columnID) {
String[] strs = columnID.toLowerCase().split("_");
StringBuffer sb = new StringBuffer();
for(int i = 0; i<strs.length; i++){
try{
sb.append(strs[i].substring(0, 1).toUpperCase() + strs[i].substring(1).toLowerCase());
}catch(Exception e){
e.printStackTrace();
System.out.println(columnID);
}
}
return sb.toString();
}
private static String getColumnComment(Connection conn, String tableID, String columnID){
String columnName = "";
// USER_TAB_COLUMNS
String sql = "select COMMENTS from USER_COL_COMMENTS where TABLE_NAME = ? and COLUMN_NAME = ?";
PreparedStatement ps = null;
ResultSet rs = null;
try{
ps = conn.prepareStatement(sql);
ps.setString(1, tableID);
ps.setString(2, columnID);
rs = ps.executeQuery();
while (rs.next()) {
columnName = rs.getString("COMMENTS");
}
}catch(Exception e){
e.printStackTrace();
}finally{
try{
if(rs != null){
rs.close();
}
if(ps != null){
ps.close();
}
}catch(Exception e){
e.printStackTrace();
}
}
return columnName;
}
private static List<String> getTableList(Connection conn ){
try{}catch(Exception e){}
List<String> tableList = new ArrayList<String>();
// USER_TAB_COLUMNS
String sql = "select distinct TABLE_NAME from USER_TAB_COLUMNS";
// System.out.println(sql);
PreparedStatement ps = null;
ResultSet rs = null;
try{
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
String tableID = "";
while (rs.next()) {
tableID = rs.getString("TABLE_NAME");
// System.out.println(tableID);
tableList.add(tableID);
}
}catch(Exception e){
e.printStackTrace();
}finally{
try{
if(rs != null){
rs.close();
}
if(ps != null){
ps.close();
}
}catch(Exception e){
e.printStackTrace();
}
}
return tableList;
}
private static String getTableName(Connection conn ,String tableID) throws Exception{
String tableName = "";
// USER_TAB_COLUMNS
String sql = "select COMMENTS from USER_TAB_COMMENTS where TABLE_NAME = ?";
PreparedStatement ps = null;
ResultSet rs = null;
ps = conn.prepareStatement(sql);
ps.setString(1, tableID);
rs = ps.executeQuery();
while (rs.next()) {
tableName = rs.getString("COMMENTS");
rs.close();
return tableName;
}
return tableName;
}
public static String toType(String str){
String result = null;
if(str.startsWith("VARCHAR2") || str.startsWith("CHAR")){
result = "String";
}else if(str.startsWith("NUMBER")){
result = "int";
}else if(str.startsWith("DATE")){
result = "Date";
}
return result;
}
}
网上查到很多关于java做成数据库表javabean的例子，但是都没有自动生成注释。
在网上查到的例子的基础上，改写了一下。发帖备份。
