package cn.net.yto.aaa.dao.generator;
/**
* 由数据库表生成jpa实体工具
*
* @author huike
* Created by gf.liu on 2017/5/25.
*/
public class GenEntityMysql {
private static final String URL = "jdbc:mysql://127.0.0.1:3306/yto_test?useUnicode=true&characterEncoding=utf8";
private static final String NAME = "root";
private static final String PASS = "root";
/**
* //指定实体生成所在包的路径
*/
private String entityPackage = "cn.net.yto.aaa.dao.entities";
/**
* 指定实体仓库接口生成所在包的路径
*/
private String repositoryPackage = "cn.net.yto.aaa.dao.repositories";
/**
* 作者名字
*/
private String authorName = "huike";
/**
* 根据表明创建entity实例类,每次一个
*/
private String tableName = "tb_stu_cou_stu";
/**
* 列名数组
*/
private List<String> colNames = new ArrayList<>();
/**
* 列名类型数组
*/
private List<String> colTypes = new ArrayList<>();
/**
* 列名大小数组
*/
private List<Integer> colSizes = new ArrayList<>();
/**
* //列补充说明
*/
private List<String> colExtras = new ArrayList<>();
/**
* 列注释
*/
private List<String> colComment = new ArrayList<>();
private List<String> colNulls = new ArrayList<>();
/**
* 是否需要导入包java.util.*
*/
private boolean f_util = false;
/**
* 是否需要导入包java.sql.*
*/
private boolean f_sql = false;
/**
* 是否需要导入包java.math.BigDecimal
*/
private boolean f_bigDecimal = false;
private static final String DRIVER = "com.mysql.jdbc.Driver";
private static final String AUTO = "auto_increment";
private static final String NO = "NO";
/*
* 构造函数
*/
public GenEntityMysql() {
}
/**
*
*/
public static void main(String[] args) {
// GenEntityMysql genEntityMysql = new GenEntityMysql();
// genEntityMysql.generateEntry();
}
/**
* 功能：生成实体类主体代码
*
* @return
*/
private String parseEntity() {
StringBuffer sb = new StringBuffer();
sb.append("package " + this.entityPackage + ";
");
sb.append("import javax.persistence.Entity;" + "
");
sb.append("import javax.persistence.Table;" + "
");
sb.append("import javax.persistence.Column;" + "
");
sb.append("import javax.persistence.Id;" + "
");
sb.append("import javax.persistence.GeneratedValue;" + "
");
sb.append("import javax.persistence.GenerationType;" + "
");
sb.append("import java.io.Serializable;" + "
");
//判断是否导入工具包
if (f_util) {
sb.append("import java.util.Date;
");
}
if (f_sql) {
sb.append("import java.sql.*;
");
}
if (f_bigDecimal) {
sb.append("import java.math.BigDecimal;
");
}
sb.append("
");
//注释部分
sb.append(" /**
");
sb.append(" * " + tableName + " 实体类
");
sb.append(" * Created by " + this.authorName + "
");
sb.append(" * " + new Date() + "
");
sb.append(" */
");
//实体部分
sb.append("@Entity " + "
");
sb.append("@Table(name = "" + tableName + "")" + "
");
sb.append("public class " + this.allInitialCapital(tableName) + " implements Serializable{
");
processAllAttrs(sb);//属性
processAllMethod(sb);//get set方法
sb.append("}
");
return sb.toString();
}
/**
* 功能：生成repository代码
*
* @return
*/
private String parseRepository() {
StringBuffer sb = new StringBuffer();
sb.append("package " + this.repositoryPackage + ";
");
sb.append("import cn.net.yto.base.dao.BaseRepository;" + "
");
sb.append("import org.springframework.stereotype.Repository;" + "
");
sb.append("import " + this.entityPackage + "." + this.allInitialCapital(tableName) + ";" + "
");
sb.append("
");
//注释部分
sb.append(" /**
");
sb.append(" * " + tableName + " Repository
");
sb.append(" * Created by " + this.authorName + "
");
sb.append(" * " + new Date() + "
");
sb.append(" */
");
//实体部分
sb.append("@Repository " + "
");
sb.append("public interface " + this.allInitialCapital(tableName) + "Repository extends BaseRepository<" + this.allInitialCapital(tableName) + ", Integer> {
");
sb.append("}
");
return sb.toString();
}
/**
* 功能：生成所有属性
*
* @param sb
*/
private void processAllAttrs(StringBuffer sb) {
for (int i = 0; i < colNames.size(); i++) {
//注释部分
sb.append(" /**
");
sb.append(" * " + colComment.get(i) + "
");
sb.append(" */
");
if (AUTO.equalsIgnoreCase(colExtras.get(i))) {
sb.append(" @Id" + "
");
sb.append(" @GeneratedValue(strategy = GenerationType.IDENTITY)" + "
");
}
sb.append(" @Column(name = "" + colNames.get(i) + """);
if (NO.equalsIgnoreCase(colNulls.get(i))) {
sb.append(", nullable = false");
}
if (colSizes.get(i) > 0) {
sb.append(", length = " + colSizes.get(i));
}
sb.append(")" + "
");
sb.append(" private " + sqlType2JavaType(colTypes.get(i)) + " " + this.secInitialCapital(colNames.get(i)) + ";
");
}
}
/**
* 功能：生成所有方法
*
* @param sb
*/
private void processAllMethod(StringBuffer sb) {
for (int i = 0; i < colNames.size(); i++) {
sb.append(" public " + sqlType2JavaType(colTypes.get(i)) + " get" + this.allInitialCapital(colNames.get(i)) + "(){
");
sb.append(" return " + this.secInitialCapital(colNames.get(i)) + ";
");
sb.append(" }
");
sb.append(" public void set" + this.allInitialCapital(colNames.get(i)) + "(" + sqlType2JavaType(colTypes.get(i)) + " " +
this.secInitialCapital(colNames.get(i)) + "){
");
sb.append(" this." + this.secInitialCapital(colNames.get(i)) + "=" + this.secInitialCapital(colNames.get(i)) + ";
");
sb.append(" }
");
}
}
/**
* 功能：将输入字符串的首字母改成大写
*
* @param str
* @return
*/
private String initialCapital(String str) {
char[] ch = str.toCharArray();
if (ch[0] >= 'a' && ch[0] <= 'z') {
ch[0] = (char) (ch[0] - 32);
}
return new String(ch);
}
/**
* 所有字母转成小写
*
* @return
*/
private String allLowerCase(String str) {
if (StringUtils.isEmpty(str)) {
return str;
}
return str.toLowerCase();
}
/**
* 分解名称
*
* @param str
* @return
*/
private String[] splitName(String str) {
if (StringUtils.isEmpty(str)) {
return null;
}
return str.split("_");
}
/**
* 由数据库表名生成实体类名
*
* @param tableName
* @return
*/
private String allInitialCapital(String tableName) {
if (StringUtils.isEmpty(tableName)) {
return null;
}
tableName = this.allLowerCase(tableName);
String[] tableNameArray = this.splitName(tableName);
StringBuffer entryName = new StringBuffer();
for (String part : tableNameArray) {
entryName.append(this.initialCapital(part));
}
return entryName.toString();
}
/**
* 由数据库列名生成实体类属性名
*
* @param columnName
* @return
*/
private String secInitialCapital(String columnName) {
if (StringUtils.isEmpty(columnName)) {
return null;
}
columnName = this.allLowerCase(columnName);
String[] columnNameArray = this.splitName(columnName);
StringBuffer fieldName = new StringBuffer();
for (int i = 0; i < columnNameArray.length; i++) {
String part = columnNameArray[i];
if (0 == i) {
fieldName.append(part);
} else {
fieldName.append(this.initialCapital(part));
}
}
return fieldName.toString();
}
/**
* 功能：获得列的数据类型
*
* @param sqlType
* @return
*/
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")) {
return "Integer";
} else if (sqlType.equalsIgnoreCase("bigint")) {
return "Long";
} else if (sqlType.equalsIgnoreCase("float")) {
return "Float";
} else if (sqlType.equalsIgnoreCase("decimal")) {
return "BigDecimal";
} else if (sqlType.equalsIgnoreCase("numeric")
|| sqlType.equalsIgnoreCase("real") || sqlType.equalsIgnoreCase("money")
|| sqlType.equalsIgnoreCase("smallmoney")) {
return "Double";
} else if (sqlType.equalsIgnoreCase("varchar") || sqlType.equalsIgnoreCase("char")
|| sqlType.equalsIgnoreCase("nvarchar") || sqlType.equalsIgnoreCase("nchar")
|| sqlType.equalsIgnoreCase("text")) {
return "String";
} else if (sqlType.equalsIgnoreCase("datetime")) {
return "Date";
} else if (sqlType.equalsIgnoreCase("image")) {
return "Blod";
}
return null;
}
/**
* 生成实体
*/
public void generateEntry() {
//
this.getTableAttribute();
String entityContent = this.parseEntity();
this.writerEntityToFile(entityContent);
String repositoryContent = this.parseRepository();
this.writerRepositoryToFile(repositoryContent);
}
/**
* 写入文件
*
* @param content
*/
private void writerRepositoryToFile(String content) {
try {
String absolutePath = this.getClass().getResource("").getPath();
absolutePath = absolutePath.substring(0, absolutePath.indexOf("target"));
String outputPath = absolutePath + "src/main/java/" + this.repositoryPackage.replace(".", "/") + "/"
+ this.allInitialCapital(tableName) + "Repository" + ".java";
System.out.println("Repository路径：" + outputPath);
FileWriter fw = new FileWriter(outputPath);
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 写入文件
*
* @param content
*/
private void writerEntityToFile(String content) {
try {
String absolutePath = this.getClass().getResource("").getPath();
absolutePath = absolutePath.substring(0, absolutePath.indexOf("target"));
String outputPath = absolutePath + "src/main/java/" + this.entityPackage.replace(".", "/") + "/"
+ allInitialCapital(tableName) + ".java";
System.out.println("Entity路径：" + outputPath);
FileWriter fw = new FileWriter(outputPath);
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 获取数据库信息
*/
private void getTableAttribute() {
//创建连接
Connection con = null;
//查要生成实体类的表
String sql = "show full columns from " + tableName;
Statement state = null;
try {
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
}
con = DriverManager.getConnection(URL, NAME, PASS);
state = con.createStatement();
ResultSet rs = state.executeQuery(sql);
// ResultSetMetaData metaData = rs.getMetaData();
while (rs.next()) {
colNames.add(rs.getString("Field"));
String type = rs.getString("Type");
String comment = rs.getString("Comment");
String extra = rs.getString("Extra");
String colNull = rs.getString("Null");
int colSize = 0;
if (type.contains("(")) {
String colSizeStr = type.substring(type.indexOf("(") + 1, type.indexOf(")"));
type = type.substring(0, type.indexOf("("));
try {
colSize = Integer.valueOf(colSizeStr);
} catch (NumberFormatException e) {
}
}
colTypes.add(type);
colSizes.add(colSize);
colComment.add(comment);
colExtras.add(extra);
colNulls.add(colNull);
if (type.equalsIgnoreCase("datetime")) {
f_util = true;
}
if (type.equalsIgnoreCase("image") || type.equalsIgnoreCase("text")) {
f_sql = true;
}
if (type.equalsIgnoreCase("decimal")) {
f_bigDecimal = true;
}
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (null != con) {
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}
package cn.net.yto.aaa.dao.generator;
import org.apache.commons.lang.StringUtils;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
/**
* 由数据库表生成jpa实体工具
*
* @author huike
* Created by gf.liu on 2017/5/25.
*/
public class GenEntityMysql {
private static final String URL = "jdbc:mysql://127.0.0.1:3306/yto_test?useUnicode=true&characterEncoding=utf8";
private static final String NAME = "root";
private static final String PASS = "root";
/**
* //指定实体生成所在包的路径
*/
private String entityPackage = "cn.net.yto.aaa.dao.entities";
/**
* 指定实体仓库接口生成所在包的路径
*/
private String repositoryPackage = "cn.net.yto.aaa.dao.repositories";
/**
* 作者名字
*/
private String authorName = "huike";
/**
* 根据表明创建entity实例类,每次一个
*/
private String tableName = "tb_stu_cou_stu";
/**
* 列名数组
*/
private List<String> colNames = new ArrayList<>();
/**
* 列名类型数组
*/
private List<String> colTypes = new ArrayList<>();
/**
* 列名大小数组
*/
private List<Integer> colSizes = new ArrayList<>();
/**
* //列补充说明
*/
private List<String> colExtras = new ArrayList<>();
/**
* 列注释
*/
private List<String> colComment = new ArrayList<>();
private List<String> colNulls = new ArrayList<>();
/**
* 是否需要导入包java.util.*
*/
private boolean f_util = false;
/**
* 是否需要导入包java.sql.*
*/
private boolean f_sql = false;
/**
* 是否需要导入包java.math.BigDecimal
*/
private boolean f_bigDecimal = false;
private static final String DRIVER = "com.mysql.jdbc.Driver";
private static final String AUTO = "auto_increment";
private static final String NO = "NO";
/*
* 构造函数
*/
public GenEntityMysql() {
}
/**
*
*/
public static void main(String[] args) {
// GenEntityMysql genEntityMysql = new GenEntityMysql();
// genEntityMysql.generateEntry();
}
/**
* 功能：生成实体类主体代码
*
* @return
*/
private String parseEntity() {
StringBuffer sb = new StringBuffer();
sb.append("package " + this.entityPackage + ";
");
sb.append("import javax.persistence.Entity;" + "
");
sb.append("import javax.persistence.Table;" + "
");
sb.append("import javax.persistence.Column;" + "
");
sb.append("import javax.persistence.Id;" + "
");
sb.append("import javax.persistence.GeneratedValue;" + "
");
sb.append("import javax.persistence.GenerationType;" + "
");
sb.append("import java.io.Serializable;" + "
");
//判断是否导入工具包
if (f_util) {
sb.append("import java.util.Date;
");
}
if (f_sql) {
sb.append("import java.sql.*;
");
}
if (f_bigDecimal) {
sb.append("import java.math.BigDecimal;
");
}
sb.append("
");
//注释部分
sb.append(" /**
");
sb.append(" * " + tableName + " 实体类
");
sb.append(" * Created by " + this.authorName + "
");
sb.append(" * " + new Date() + "
");
sb.append(" */
");
//实体部分
sb.append("@Entity " + "
");
sb.append("@Table(name = "" + tableName + "")" + "
");
sb.append("public class " + this.allInitialCapital(tableName) + " implements Serializable{
");
processAllAttrs(sb);//属性
processAllMethod(sb);//get set方法
sb.append("}
");
return sb.toString();
}
/**
* 功能：生成repository代码
*
* @return
*/
private String parseRepository() {
StringBuffer sb = new StringBuffer();
sb.append("package " + this.repositoryPackage + ";
");
sb.append("import cn.net.yto.base.dao.BaseRepository;" + "
");
sb.append("import org.springframework.stereotype.Repository;" + "
");
sb.append("import " + this.entityPackage + "." + this.allInitialCapital(tableName) + ";" + "
");
sb.append("
");
//注释部分
sb.append(" /**
");
sb.append(" * " + tableName + " Repository
");
sb.append(" * Created by " + this.authorName + "
");
sb.append(" * " + new Date() + "
");
sb.append(" */
");
//实体部分
sb.append("@Repository " + "
");
sb.append("public interface " + this.allInitialCapital(tableName) + "Repository extends BaseRepository<" + this.allInitialCapital(tableName) + ", Integer> {
");
sb.append("}
");
return sb.toString();
}
/**
* 功能：生成所有属性
*
* @param sb
*/
private void processAllAttrs(StringBuffer sb) {
for (int i = 0; i < colNames.size(); i++) {
//注释部分
sb.append(" /**
");
sb.append(" * " + colComment.get(i) + "
");
sb.append(" */
");
if (AUTO.equalsIgnoreCase(colExtras.get(i))) {
sb.append(" @Id" + "
");
sb.append(" @GeneratedValue(strategy = GenerationType.IDENTITY)" + "
");
}
sb.append(" @Column(name = "" + colNames.get(i) + """);
if (NO.equalsIgnoreCase(colNulls.get(i))) {
sb.append(", nullable = false");
}
if (colSizes.get(i) > 0) {
sb.append(", length = " + colSizes.get(i));
}
sb.append(")" + "
");
sb.append(" private " + sqlType2JavaType(colTypes.get(i)) + " " + this.secInitialCapital(colNames.get(i)) + ";
");
}
}
/**
* 功能：生成所有方法
*
* @param sb
*/
private void processAllMethod(StringBuffer sb) {
for (int i = 0; i < colNames.size(); i++) {
sb.append(" public " + sqlType2JavaType(colTypes.get(i)) + " get" + this.allInitialCapital(colNames.get(i)) + "(){
");
sb.append(" return " + this.secInitialCapital(colNames.get(i)) + ";
");
sb.append(" }
");
sb.append(" public void set" + this.allInitialCapital(colNames.get(i)) + "(" + sqlType2JavaType(colTypes.get(i)) + " " +
this.secInitialCapital(colNames.get(i)) + "){
");
sb.append(" this." + this.secInitialCapital(colNames.get(i)) + "=" + this.secInitialCapital(colNames.get(i)) + ";
");
sb.append(" }
");
}
}
/**
* 功能：将输入字符串的首字母改成大写
*
* @param str
* @return
*/
private String initialCapital(String str) {
char[] ch = str.toCharArray();
if (ch[0] >= 'a' && ch[0] <= 'z') {
ch[0] = (char) (ch[0] - 32);
}
return new String(ch);
}
/**
* 所有字母转成小写
*
* @return
*/
private String allLowerCase(String str) {
if (StringUtils.isEmpty(str)) {
return str;
}
return str.toLowerCase();
}
/**
* 分解名称
*
* @param str
* @return
*/
private String[] splitName(String str) {
if (StringUtils.isEmpty(str)) {
return null;
}
return str.split("_");
}
/**
* 由数据库表名生成实体类名
*
* @param tableName
* @return
*/
private String allInitialCapital(String tableName) {
if (StringUtils.isEmpty(tableName)) {
return null;
}
tableName = this.allLowerCase(tableName);
String[] tableNameArray = this.splitName(tableName);
StringBuffer entryName = new StringBuffer();
for (String part : tableNameArray) {
entryName.append(this.initialCapital(part));
}
return entryName.toString();
}
/**
* 由数据库列名生成实体类属性名
*
* @param columnName
* @return
*/
private String secInitialCapital(String columnName) {
if (StringUtils.isEmpty(columnName)) {
return null;
}
columnName = this.allLowerCase(columnName);
String[] columnNameArray = this.splitName(columnName);
StringBuffer fieldName = new StringBuffer();
for (int i = 0; i < columnNameArray.length; i++) {
String part = columnNameArray[i];
if (0 == i) {
fieldName.append(part);
} else {
fieldName.append(this.initialCapital(part));
}
}
return fieldName.toString();
}
/**
* 功能：获得列的数据类型
*
* @param sqlType
* @return
*/
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")) {
return "Integer";
} else if (sqlType.equalsIgnoreCase("bigint")) {
return "Long";
} else if (sqlType.equalsIgnoreCase("float")) {
return "Float";
} else if (sqlType.equalsIgnoreCase("decimal")) {
return "BigDecimal";
} else if (sqlType.equalsIgnoreCase("numeric")
|| sqlType.equalsIgnoreCase("real") || sqlType.equalsIgnoreCase("money")
|| sqlType.equalsIgnoreCase("smallmoney")) {
return "Double";
} else if (sqlType.equalsIgnoreCase("varchar") || sqlType.equalsIgnoreCase("char")
|| sqlType.equalsIgnoreCase("nvarchar") || sqlType.equalsIgnoreCase("nchar")
|| sqlType.equalsIgnoreCase("text")) {
return "String";
} else if (sqlType.equalsIgnoreCase("datetime")) {
return "Date";
} else if (sqlType.equalsIgnoreCase("image")) {
return "Blod";
}
return null;
}
/**
* 生成实体
*/
public void generateEntry() {
//
this.getTableAttribute();
String entityContent = this.parseEntity();
this.writerEntityToFile(entityContent);
String repositoryContent = this.parseRepository();
this.writerRepositoryToFile(repositoryContent);
}
/**
* 写入文件
*
* @param content
*/
private void writerRepositoryToFile(String content) {
try {
String absolutePath = this.getClass().getResource("").getPath();
absolutePath = absolutePath.substring(0, absolutePath.indexOf("target"));
String outputPath = absolutePath + "src/main/java/" + this.repositoryPackage.replace(".", "/") + "/"
+ this.allInitialCapital(tableName) + "Repository" + ".java";
System.out.println("Repository路径：" + outputPath);
FileWriter fw = new FileWriter(outputPath);
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 写入文件
*
* @param content
*/
private void writerEntityToFile(String content) {
try {
String absolutePath = this.getClass().getResource("").getPath();
absolutePath = absolutePath.substring(0, absolutePath.indexOf("target"));
String outputPath = absolutePath + "src/main/java/" + this.entityPackage.replace(".", "/") + "/"
+ allInitialCapital(tableName) + ".java";
System.out.println("Entity路径：" + outputPath);
FileWriter fw = new FileWriter(outputPath);
PrintWriter pw = new PrintWriter(fw);
pw.println(content);
pw.flush();
pw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 获取数据库信息
*/
private void getTableAttribute() {
//创建连接
Connection con = null;
//查要生成实体类的表
String sql = "show full columns from " + tableName;
Statement state = null;
try {
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
}
con = DriverManager.getConnection(URL, NAME, PASS);
state = con.createStatement();
ResultSet rs = state.executeQuery(sql);
// ResultSetMetaData metaData = rs.getMetaData();
while (rs.next()) {
colNames.add(rs.getString("Field"));
String type = rs.getString("Type");
String comment = rs.getString("Comment");
String extra = rs.getString("Extra");
String colNull = rs.getString("Null");
int colSize = 0;
if (type.contains("(")) {
String colSizeStr = type.substring(type.indexOf("(") + 1, type.indexOf(")"));
type = type.substring(0, type.indexOf("("));
try {
colSize = Integer.valueOf(colSizeStr);
} catch (NumberFormatException e) {
}
}
colTypes.add(type);
colSizes.add(colSize);
colComment.add(comment);
colExtras.add(extra);
colNulls.add(colNull);
if (type.equalsIgnoreCase("datetime")) {
f_util = true;
}
if (type.equalsIgnoreCase("image") || type.equalsIgnoreCase("text")) {
f_sql = true;
}
if (type.equalsIgnoreCase("decimal")) {
f_bigDecimal = true;
}
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (null != con) {
try {
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}