使用方法_注：1_2只適用於普通的web項目（綠色部分），_Maven只適用於maven項目（藍色部分），使用建實體類的方式（黑色部分），在util包下創建，創建類後直接運行此類，使用此類前，要先與數據庫進行連接
package club.lygangdai.a;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
/**
* @ClassName: GeneratingEntityClass
* @Description: TODO(根據數據庫表名生成對應實體類，注意：同一路徑下對已存在相同類名的類會被替換)
* @author Uncle liu
* @date 2018年6月11日 下午2:11:18
*
*/
public class GeneratingEntityClass_1_2 {
private String packageOutPath; //指定實體生成所在包的路徑
private String authorName; //作者名字
private String tablename; //表名
private String explain; //類說明
private String[] colnames; // 列名數組
private String[] colTypes; //列名類型數組
private int[] colSizes; //列名大小數組
private boolean f_util = false; // 是否需要導入包java.util.*
private boolean f_sql = false; // 是否需要導入包java.sql.*
private Connection con = null;
private String outputPath = null;//生成路徑
/**
*
* @Description: TODO(無參構造方法)
*/
public GeneratingEntityClass_1_2() {
}
/**
*
* @Description: TODO(有參構造函數/用於生成一個表實體類/生成一個多表聯查)
* @param packageOutPath 指定實體生成所在包的路徑 (如：com.ly.calculator.entity)
* @param tablename 表名
* @param authorName 作者名字
* @param explain 類說明
* @param Connection 傳入數據庫連接
* 根據數據庫表名生成對應實體類，注意：同一路徑下對已存在相同類名的類會被替換
*/
public GeneratingEntityClass_1_2(String packageOutPath,String tablename,String authorName,String explain,Connection con){
this.packageOutPath=packageOutPath;
this.tablename=tablename;
this.authorName=authorName;
this.explain=explain;
this.con=con;
}
/**
*
* @Title: ToPerformAll
* @Description: TODO(匹配無參構造方法一起使用，生成對應數據庫所有表實體類)
* @param packageOutPath 指定實體生成所在包的路徑 (如：com.ly.calculator.entity)
* @param authorName 作者名字
* @param Connection 傳入數據庫連接
*/
public void ToPerformAll(String packageOutPath,String authorName,Connection con) {
this.packageOutPath=packageOutPath;
this.authorName=authorName;
this.con=con;
Statement stmt = null;
try {
stmt = con.createStatement();
// 執行語句!
ResultSet rs = stmt.executeQuery("show tables; ");
// 使用ResultSet對象!
while (rs.next()) {
this.tablename=rs.getString(1);//表名
//生成實體類
generate();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
*
* @Title: generate
* @Description: TODO(生成實體類) void
*/
public void generate() {
try {
//查要生成實體類的表
String sql = "select * from " + tablename;
PreparedStatement pStemt = null;
pStemt = con.prepareStatement(sql);
ResultSetMetaData rsmd = pStemt.getMetaData();
int size = rsmd.getColumnCount(); //統計列
colnames = new String[size];
colTypes = new String[size];
colSizes = new int[size];
for (int i = 0; i < size; i++) {
colnames[i] = rsmd.getColumnName(i + 1);
colTypes[i] = rsmd.getColumnTypeName(i + 1);
if(colTypes[i].equalsIgnoreCase("datetime")){
f_util = true;
}
if(colTypes[i].equalsIgnoreCase("image") || colTypes[i].equalsIgnoreCase("text")){
f_sql = true;
}
colSizes[i] = rsmd.getColumnDisplaySize(i + 1);
}
String content = parse(colnames,colTypes,colSizes);
try {
File directory = new File("");
//String path=this.getClass().getResource("").getPath();
String outputPath = directory.getAbsolutePath()+ "\\src\\"+this.packageOutPath.replace(".", "\\")+"\\"+initcap(tablename) + ".java";
FileWriter fw = new FileWriter(outputPath);
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception e) {
// TODO: handle exception
}
}
/**
*
* @Title: generateSelect
* @Description: TODO(多表聯查生成實體類)
* @param sql 查詢sql
* @param alias 查詢表的別名
*/
public void generateSelect(String sql) {
try {
PreparedStatement pStemt = null;
pStemt = con.prepareStatement(sql);
ResultSetMetaData rsmd = pStemt.getMetaData();
int size = rsmd.getColumnCount(); //統計列
colnames = new String[size];
colTypes = new String[size];
colSizes = new int[size];
for (int i = 0; i < size; i++) {
colnames[i] = rsmd.getColumnName(i + 1);
colTypes[i] = rsmd.getColumnTypeName(i + 1);
if(colTypes[i].equalsIgnoreCase("datetime")){
f_util = true;
}
if(colTypes[i].equalsIgnoreCase("image") || colTypes[i].equalsIgnoreCase("text")){
f_sql = true;
}
colSizes[i] = rsmd.getColumnDisplaySize(i + 1);
}
String content = parse(colnames,colTypes,colSizes);
try {
File directory = new File("");
// String path=this.getClass().getResource("").getPath();
// System.out.println(path);
outputPath = directory.getAbsolutePath()+ "\\src\\main\\java\\"+this.packageOutPath.replace(".", "\\")+"\\"+initcap(tablename) + ".java";
// System.out.println(outputPath);
FileWriter fw = new FileWriter(outputPath);
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
System.out.println("找不到指定路徑："+outputPath);
throw new RuntimeException("找不到指定路徑");
}
} catch (Exception e) {
// TODO: handle exception
throw new RuntimeException("找不到指定路徑");
}
}
/**
* 功能：生成實體類主體代碼
* @param colnames
* @param colTypes
* @param colSizes
* @return
*/
private String parse(String[] colnames, String[] colTypes, int[] colSizes) {
StringBuffer sb = new StringBuffer();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//設置日期格式
sb.append("package " + this.packageOutPath + ";\r\n");
sb.append("\r\n");
//判斷是否導入工具包
if(f_util){
sb.append("import java.util.Date;\r\n");
}
if(f_sql){
sb.append("import java.sql.*;\r\n");
}
sb.append("import java.io.Serializable;\r\n");
sb.append("\r\n");
//註釋部分
sb.append("/**\r\n");
sb.append(" * @ClassName:"+tablename+" \r\n");
sb.append(" * @Description: TODO(類說明："+explain+" )\r\n");
sb.append(" * @author "+this.authorName+" \r\n");
sb.append(" * @date "+df.format(new Date())+"\r\n");
sb.append(" */ \r\n");
//實體部分
sb.append("public class " + initcap(tablename) + " implements Serializable{\r\n");
sb.append("\tprivate static final long serialVersionUID = 1L;\r\n");
processAllAttrs(sb);//屬性
processNoarguments(sb);//無參構造方法
processConstructor(sb);//有參構造方法
processAllMethod(sb);//get set方法
processToString(sb);//toString
sb.append("}\r\n");
return sb.toString();
}
/**
*
* @Title: processAllAttrs
* @Description: TODO(生成所有屬性 )
* @param sb void
*/
private void processAllAttrs(StringBuffer sb) {
for (int i = 0; i < colnames.length; i++) {
sb.append("\tprivate " + sqlType2JavaType(colTypes[i]) + " " + colnames[i].toString() + "; //"+colnames[i].toString()+"\r\n");
}
}
/**
*
* @Title: processToString
* @Description: TODO(生成toString)
* @param sb void
*/
private void processToString(StringBuffer sb) {
//註釋部分
sb.append("\t/**\r\n");
sb.append("\t * @Title:toString \r\n");
sb.append("\t * @Description: TODO(toString)\r\n");
sb.append("\t */ \r\n");
sb.append("\tpublic String toString() { \r\n");
for (int i = 0; i < colnames.length; i++) {
//如果只有一個屬性
if(colnames.length==1) {
sb.append("\t return \""+initcap(tablename)+"["+colnames[i].toString()+"=\" + "+colnames[i].toString()+" + \"]\";");
}else {
if(i%3==0 && i!=0) {
sb.append("\"+\r\n\t\t\"");
}
if(i==0) {
sb.append("\t return \""+initcap(tablename)+"["+colnames[i].toString()+"=\" + "+colnames[i].toString()+" + \",");
}else if(i==colnames.length-1) {
sb.append(colnames[i].toString()+"=\" + "+colnames[i].toString()+" + \"]\";");
}else {
sb.append(colnames[i].toString()+"=\" + "+colnames[i].toString()+" + \",");
}
}
}
sb.append("\r\n\t}\r\n");
}
/**
*
* @Title: processAllMethod
* @Description: TODO(生成所有set/get方法 )
* @param sb void
*/
private void processAllMethod(StringBuffer sb) {
for (int i = 0; i < colnames.length; i++) {
sb.append("\t/**\r\n");
sb.append("\t * @Title:set"+initcap(colnames[i].toString())+" \r\n");
sb.append("\t * @Description: TODO(設置"+initcap(colnames[i].toString())+")\r\n");
sb.append("\t * @param "+colnames[i].toString()+"\r\n");
sb.append("\t */ \r\n");
sb.append("\tpublic void set" + initcap(colnames[i].toString()) + "(" + sqlType2JavaType(colTypes[i]) + " " +
colnames[i].toString() + "){\r\n");
sb.append("\t\tthis." + colnames[i].toString() + "=" + colnames[i].toString() + ";\r\n");
sb.append("\t}\r\n");
sb.append("\t/**\r\n");
sb.append("\t * @Title:set"+initcap(colnames[i].toString())+" \r\n");
sb.append("\t * @Description: TODO(得到"+initcap(colnames[i].toString())+")\r\n");
sb.append("\t * @return "+sqlType2JavaType(colTypes[i])+"\r\n");
sb.append("\t */ ");
sb.append("\tpublic " + sqlType2JavaType(colTypes[i]) + " get" + initcap(colnames[i].toString()) + "(){\r\n");
sb.append("\t\treturn " + colnames[i].toString() + ";\r\n");
sb.append("\t}\r\n");
}
}
/**
*
* @Title: processNoarguments
* @Description: TODO(生成無參構造方法)
* @param sb void
*/
private void processNoarguments(StringBuffer sb) {
sb.append("\t/**\r\n");
sb.append("\t * @Description: TODO(無參構造方法) \r\n");
sb.append("\t */ \r\n");
sb.append("\tpublic " + initcap(tablename) + "(){\r\n");
sb.append("\t}\r\n");
}
/**
*
* @Title: processConstructor
* @Description: TODO(生成有參構造方法)
* @param sb void
*/
private void processConstructor(StringBuffer sb) {
sb.append("\t/**\r\n");
sb.append("\t * @Description: TODO(有參構造方法) \r\n");
for (int i = 0; i < colnames.length; i++) {
sb.append("\t * @param " + colnames[i].toString() +"\r\n");
}
sb.append("\t */ \r\n");
sb.append("\tpublic " + initcap(tablename) + "(");
for (int i = 0; i < colnames.length; i++) {
if(i==colnames.length-1) {
sb.append(sqlType2JavaType(colTypes[i])+" "+colnames[i].toString()+"){\r\n");
}else {
sb.append(sqlType2JavaType(colTypes[i])+" "+colnames[i].toString()+",");
}
}
for (int i = 0; i < colnames.length; i++) {
sb.append("\t\tthis." + colnames[i].toString() + "=" + colnames[i].toString() + ";\r\n");
}
sb.append("\t}\r\n");
}
/**
*
* @Title: initcap
* @Description: TODO(將輸入字符串的首字母改成大寫)
* @param str
* @return String
*/
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);
}
/**
*
* @Title: sqlType2JavaType
* @Description: TODO(獲得列的數據類型)
* @param sqlType
* @return String
*/
private String sqlType2JavaType(String sqlType) {
if(sqlType.equalsIgnoreCase("bit")){
return "boolean";
}else if(sqlType.equalsIgnoreCase("tinyint")){
return "byte";
}else if(sqlType.equalsIgnoreCase("smallint")){
return "short";
}else if(sqlType.equalsIgnoreCase("int") || sqlType.equalsIgnoreCase("Integer")){
return "Integer";
}else if(sqlType.equalsIgnoreCase("bigint")){
return "long";
}else if(sqlType.equalsIgnoreCase("float")){
return "float";
}else if(sqlType.equalsIgnoreCase("decimal") || sqlType.equalsIgnoreCase("numeric")
|| sqlType.equalsIgnoreCase("real") || sqlType.equalsIgnoreCase("money")
|| sqlType.equalsIgnoreCase("smallmoney")){
return "double";
}else{
return "String";
}
}
}
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package test;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.Serializable;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;
/**
* @ClassName: GeneratingEntityClass
* @Description: TODO(根據數據庫表名生成對應實體類，注意：同一路徑下對已存在相同類名的類會被替換)
* @author Uncle liu
* @date 2018年6月11日 下午2:11:18
*
*/
public class GeneratingEntityClass_Maven {
private String packageOutPath; //指定實體生成所在包的路徑
private String authorName; //作者名字
private String tablename; //表名
private String explain; //類說明
private String[] colnames; // 列名數組
private String[] colTypes; //列名類型數組
private int[] colSizes; //列名大小數組
private boolean f_util = false; // 是否需要導入包java.util.*
private boolean f_sql = false; // 是否需要導入包java.sql.*
private Connection con = null;
private String outputPath = null;//生成路徑
/**
*
* @Description: TODO(無參構造方法)
*/
public GeneratingEntityClass_Maven() {
}
/**
*
* @Description: TODO(有參構造函數/用於生成一個表實體類/生成一個多表聯查)
* @param packageOutPath 指定實體生成所在包的路徑 (如：com.ly.calculator.entity)
* @param tablename 表名
* @param authorName 作者名字
* @param explain 類說明
* @param Connection 傳入數據庫連接
* 根據數據庫表名生成對應實體類，注意：同一路徑下對已存在相同類名的類會被替換
*/
public GeneratingEntityClass_Maven(String packageOutPath,String tablename,String authorName,String explain,Connection con){
this.packageOutPath=packageOutPath;
this.tablename=tablename;
this.authorName=authorName;
this.explain=explain;
this.con=con;
}
/**
*
* @Title: ToPerformAll
* @Description: TODO(匹配無參構造方法一起使用，生成對應數據庫所有表實體類)
* @param packageOutPath 指定實體生成所在包的路徑 (如：com.ly.calculator.entity)
* @param authorName 作者名字
* @param Connection 傳入數據庫連接
*/
public void ToPerformAll(String packageOutPath,String authorName,Connection con) {
this.packageOutPath=packageOutPath;
this.authorName=authorName;
this.con=con;
Statement stmt = null;
try {
stmt = con.createStatement();
// 執行語句!
ResultSet rs = stmt.executeQuery("show tables; ");
// 使用ResultSet對象!
while (rs.next()) {
this.tablename=rs.getString(1);//表名
//生成實體類
generate();
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
*
* @Title: generate
* @Description: TODO(生成實體類) void
*/
public void generate() {
try {
//查要生成實體類的表
String sql = "select * from " + tablename;
PreparedStatement pStemt = null;
pStemt = con.prepareStatement(sql);
ResultSetMetaData rsmd = pStemt.getMetaData();
int size = rsmd.getColumnCount(); //統計列
colnames = new String[size];
colTypes = new String[size];
colSizes = new int[size];
for (int i = 0; i < size; i++) {
colnames[i] = rsmd.getColumnName(i + 1);
colTypes[i] = rsmd.getColumnTypeName(i + 1);
if(colTypes[i].equalsIgnoreCase("datetime")){
f_util = true;
}
if(colTypes[i].equalsIgnoreCase("image") || colTypes[i].equalsIgnoreCase("text")){
f_sql = true;
}
colSizes[i] = rsmd.getColumnDisplaySize(i + 1);
}
String content = parse(colnames,colTypes,colSizes);
try {
File directory = new File("");
// String path=this.getClass().getResource("").getPath();
// System.out.println(path);
outputPath = directory.getAbsolutePath()+ "\\src\\main\\java\\"+this.packageOutPath.replace(".", "\\")+"\\"+initcap(tablename) + ".java";
// System.out.println(outputPath);
FileWriter fw = new FileWriter(outputPath);
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
System.out.println("找不到指定路徑"+outputPath);
throw new RuntimeException("找不到指定路徑");
}
} catch (Exception e) {
// TODO: handle exception
throw new RuntimeException("找不到指定路徑");
}
}
/**
*
* @Title: generateSelect
* @Description: TODO(多表聯查生成實體類)
* @param sql 查詢sql
* @param alias 查詢表的別名
*/
public void generateSelect(String sql) {
try {
PreparedStatement pStemt = null;
pStemt = con.prepareStatement(sql);
ResultSetMetaData rsmd = pStemt.getMetaData();
int size = rsmd.getColumnCount(); //統計列
colnames = new String[size];
colTypes = new String[size];
colSizes = new int[size];
for (int i = 0; i < size; i++) {
colnames[i] = rsmd.getColumnName(i + 1);
colTypes[i] = rsmd.getColumnTypeName(i + 1);
if(colTypes[i].equalsIgnoreCase("datetime")){
f_util = true;
}
if(colTypes[i].equalsIgnoreCase("image") || colTypes[i].equalsIgnoreCase("text")){
f_sql = true;
}
colSizes[i] = rsmd.getColumnDisplaySize(i + 1);
}
String content = parse(colnames,colTypes,colSizes);
try {
File directory = new File("");
//String path=this.getClass().getResource("").getPath();
String outputPath = directory.getAbsolutePath()+ "\\src\\"+this.packageOutPath.replace(".", "\\")+"\\"+initcap(tablename) + ".java";
FileWriter fw = new FileWriter(outputPath);
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception e) {
// TODO: handle exception
}
}
/**
* 功能：生成實體類主體代碼
* @param colnames
* @param colTypes
* @param colSizes
* @return
*/
private String parse(String[] colnames, String[] colTypes, int[] colSizes) {
StringBuffer sb = new StringBuffer();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//設置日期格式
sb.append("package " + this.packageOutPath + ";\r\n");
sb.append("\r\n");
//判斷是否導入工具包
if(f_util){
sb.append("import java.util.Date;\r\n");
}
if(f_sql){
sb.append("import java.sql.*;\r\n");
}
sb.append("import java.io.Serializable;\r\n");
sb.append("\r\n");
//註釋部分
sb.append("/**\r\n");
sb.append(" * @ClassName:"+tablename+" \r\n");
sb.append(" * @Description: TODO(類說明："+explain+" )\r\n");
sb.append(" * @author "+this.authorName+" \r\n");
sb.append(" * @date "+df.format(new Date())+"\r\n");
sb.append(" */ \r\n");
//實體部分
sb.append("public class " + initcap(tablename) + " implements Serializable{\r\n");
sb.append("\tprivate static final long serialVersionUID = 1L;\r\n");
processAllAttrs(sb);//屬性
processNoarguments(sb);//無參構造方法
processConstructor(sb);//有參構造方法
processAllMethod(sb);//get set方法
processToString(sb);//toString
sb.append("}\r\n");
return sb.toString();
}
/**
*
* @Title: processAllAttrs
* @Description: TODO(生成所有屬性 )
* @param sb void
*/
private void processAllAttrs(StringBuffer sb) {
for (int i = 0; i < colnames.length; i++) {
sb.append("\tprivate " + sqlType2JavaType(colTypes[i]) + " " + colnames[i].toString() + "; //"+colnames[i].toString()+"\r\n");
}
}
/**
*
* @Title: processToString
* @Description: TODO(生成toString)
* @param sb void
*/
private void processToString(StringBuffer sb) {
//註釋部分
sb.append("\t/**\r\n");
sb.append("\t * @Title:toString \r\n");
sb.append("\t * @Description: TODO(toString)\r\n");
sb.append("\t */ \r\n");
sb.append("\tpublic String toString() { \r\n");
for (int i = 0; i < colnames.length; i++) {
//如果只有一個屬性
if(colnames.length==1) {
sb.append("\t return \""+initcap(tablename)+"["+colnames[i].toString()+"=\" + "+colnames[i].toString()+" + \"]\";");
}else {
if(i%3==0 && i!=0) {
sb.append("\"+\r\n\t\t\"");
}
if(i==0) {
sb.append("\t return \""+initcap(tablename)+"["+colnames[i].toString()+"=\" + "+colnames[i].toString()+" + \",");
}else if(i==colnames.length-1) {
sb.append(colnames[i].toString()+"=\" + "+colnames[i].toString()+" + \"]\";");
}else {
sb.append(colnames[i].toString()+"=\" + "+colnames[i].toString()+" + \",");
}
}
}
sb.append("\r\n\t}\r\n");
}
/**
*
* @Title: processAllMethod
* @Description: TODO(生成所有set/get方法 )
* @param sb void
*/
private void processAllMethod(StringBuffer sb) {
for (int i = 0; i < colnames.length; i++) {
sb.append("\t/**\r\n");
sb.append("\t * @Title:set"+initcap(colnames[i].toString())+" \r\n");
sb.append("\t * @Description: TODO(設置"+initcap(colnames[i].toString())+")\r\n");
sb.append("\t * @param "+colnames[i].toString()+"\r\n");
sb.append("\t */ \r\n");
sb.append("\tpublic void set" + initcap(colnames[i].toString()) + "(" + sqlType2JavaType(colTypes[i]) + " " +
colnames[i].toString() + "){\r\n");
sb.append("\t\tthis." + colnames[i].toString() + "=" + colnames[i].toString() + ";\r\n");
sb.append("\t}\r\n");
sb.append("\t/**\r\n");
sb.append("\t * @Title:set"+initcap(colnames[i].toString())+" \r\n");
sb.append("\t * @Description: TODO(得到"+initcap(colnames[i].toString())+")\r\n");
sb.append("\t * @return "+sqlType2JavaType(colTypes[i])+"\r\n");
sb.append("\t */ ");
sb.append("\tpublic " + sqlType2JavaType(colTypes[i]) + " get" + initcap(colnames[i].toString()) + "(){\r\n");
sb.append("\t\treturn " + colnames[i].toString() + ";\r\n");
sb.append("\t}\r\n");
}
}
/**
*
* @Title: processNoarguments
* @Description: TODO(生成無參構造方法)
* @param sb void
*/
private void processNoarguments(StringBuffer sb) {
sb.append("\t/**\r\n");
sb.append("\t * @Description: TODO(無參構造方法) \r\n");
sb.append("\t */ \r\n");
sb.append("\tpublic " + initcap(tablename) + "(){\r\n");
sb.append("\t}\r\n");
}
/**
*
* @Title: processConstructor
* @Description: TODO(生成有參構造方法)
* @param sb void
*/
private void processConstructor(StringBuffer sb) {
sb.append("\t/**\r\n");
sb.append("\t * @Description: TODO(有參構造方法) \r\n");
for (int i = 0; i < colnames.length; i++) {
sb.append("\t * @param " + colnames[i].toString() +"\r\n");
}
sb.append("\t */ \r\n");
sb.append("\tpublic " + initcap(tablename) + "(");
for (int i = 0; i < colnames.length; i++) {
if(i==colnames.length-1) {
sb.append(sqlType2JavaType(colTypes[i])+" "+colnames[i].toString()+"){\r\n");
}else {
sb.append(sqlType2JavaType(colTypes[i])+" "+colnames[i].toString()+",");
}
}
for (int i = 0; i < colnames.length; i++) {
sb.append("\t\tthis." + colnames[i].toString() + "=" + colnames[i].toString() + ";\r\n");
}
sb.append("\t}\r\n");
}
/**
*
* @Title: initcap
* @Description: TODO(將輸入字符串的首字母改成大寫)
* @param str
* @return String
*/
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);
}
/**
*
* @Title: sqlType2JavaType
* @Description: TODO(獲得列的數據類型)
* @param sqlType
* @return String
*/
private String sqlType2JavaType(String sqlType) {
if(sqlType.equalsIgnoreCase("bit")){
return "boolean";
}else if(sqlType.equalsIgnoreCase("tinyint")){
return "byte";
}else if(sqlType.equalsIgnoreCase("smallint")){
return "short";
}else if(sqlType.equalsIgnoreCase("int") || sqlType.equalsIgnoreCase("Integer")){
return "Integer";
}else if(sqlType.equalsIgnoreCase("bigint")){
return "long";
}else if(sqlType.equalsIgnoreCase("float")){
return "float";
}else if(sqlType.equalsIgnoreCase("decimal") || sqlType.equalsIgnoreCase("numeric")
|| sqlType.equalsIgnoreCase("real") || sqlType.equalsIgnoreCase("money")
|| sqlType.equalsIgnoreCase("smallmoney")){
return "double";
}else{
return "String";
}
}
}
---------------------------------------------------------------------------------------------------------------------------------分--------------------------------------------------------------------------------------------------------------------------
割-----------------------------------------------------------------------------------------------------------------------------線-------------------------------------------------------------------------------------------------------------------
注意：每次生成完成後刷新對應文件夾
//一次生成數據庫對應所有實體類，注意已存在的同名類會被替換
//生成的實體類的類說明要自己寫
/**
*
* @Title: main
* @Description: TODO(測試)
* @param args void
* @throws SQLException
*/
public static void main(String[] args) throws SQLException {
//"com.ly.calculator.entity" 生成在此文件夾下
//"Uncle liu" 類註釋上的作者名稱 隨意輸入
//DBHelper.getCon() 數據庫連接
new GeneratingEntityClass().ToPerformAll("com.ly.calculator.entity", "Uncle liu",DBHelper.getCon());
}
//一次生成一個表對應實體類，注意已存在的同名類會被替換
/**
*
* @Title: main
* @Description: TODO(測試)
* @param args void
*/
public static void main(String[] args) {
//"com.ly.calculator.entity" 生成在此文件夾下
//"CH_REGION" 要生成實體類的數據庫表名
//"Uncle liu" 類註釋上的作者名稱 隨意輸入
// DBHelper.getCon() 數據庫連接
//"書籍實體類" 類的註釋 作用
GeneratingEntityClass gen = new GeneratingEntityClass("com.ly.calculator.entity", "CH_REGION", "Uncle liu","地址實體類",DBHelper.getCon());
//生成實體類
gen.generate();
}
//生成一個多表聯查實體類，注意已存在的同名類會被替換
/**
*
* @Title: main
* @Description: TODO(測試)
* @param args void
* @throws SQLException
*/
public static void main(String[] args) throws SQLException {
//"com.ly.calculator.entity" 生成在此文件夾下
//"books1" 多表聯查要生成實體類的數據表別名
//"Uncle liu" 類註釋上的作者名稱 隨意輸入
// DBHelper.getCon() 數據庫連接
//"書籍實體類" 類的註釋 作用
GeneratingEntityClass gen = new GeneratingEntityClass("com.ly.calculator.entity", "books1", "Uncle liu","書籍實體類",DBHelper.getCon());
//生成實體類
gen.generateSelect("select a.*,b.file_name from t_book a,t_doc b where a.book_image=b.id ORDER BY sales_volume desc");
}