使用idea的groovy脚本自动创建Jpa的实体
- 选中数据库的表；
- 右击选择Scripted Extension中的Go to scripts diretory；
- 新建一个文件，名称为：JpaGenerate POJOs.groovy；
- 复制粘贴如下内容；
- 选中数据库中需要新建entity的表；
- 右击选中Scripted Extension中的JpaGenerate POJOs.groovy执行；
- 在指定目录下生成驼峰命名的实体对象；
- 需要修改生成内容的，可以看看脚本内容，进行修改。
import com.intellij.database.model.DasTable
import com.intellij.database.model.ObjectKind
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil
import java.io.*
import java.text.SimpleDateFormat
import java.time.LocalDate
/*
* Available context bindings:
* SELECTION Iterable<DasObject>
* PROJECT project
* FILES files helper
*/
packageName = "com.cyneck.web.entity"
// 此处指定对应的类型映射，可按需修改，目前tinyint如果要映射到自定义枚举类型，只能手动修改
typeMapping = [
(~/(?i)bigint/) : "Long",
(~/(?i)smallint|mediumint|tinyint|int/) : "Integer",
(~/(?i)bool|bit/) : "Boolean",
(~/(?i)float|double|decimal|real/): "BigDecimal",
(~/(?i)time|datetime|timestamp/) : "LocalDateTime",
(~/(?i)date/) : "LocalDate",
(~/(?i)blob|mediumblob|binary|bfile|clob|raw|image/): "Byte[]",
(~/(?i)text|mediumtext/) : "String",
(~/(?i)/) : "String"
]
FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir ->
SELECTION.filter { it instanceof DasTable && it.getKind() == ObjectKind.TABLE }.each { generate(it, dir) }
}
def generate(table, dir) {
//def className = javaClassName(table.getName(), true)
def className = javaName(table.getName(), true)
def fields = calcFields(table)
packageName = getPackageName(dir)
PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(new File(dir, className + ".java")), "UTF-8"))
printWriter.withPrintWriter {out -> generate(out, className, fields,table)}
// new File(dir, className + ".java").withPrintWriter { out -> generate(out, className, fields,table) }
}
// 获取包所在文件夹路径
def getPackageName(dir) {
return dir.toString().replaceAll("\\", ".").replaceAll("/", ".").replaceAll("^.*src(\.main\.java\.)?", "") + ";"
}
def generate(out, className, fields,table) {
def tableName = table.getName()
out.println "package $packageName"
out.println ""
out.println "import javax.persistence.*;"
/*out.println "import javax.persistence.Entity;"
out.println "import javax.persistence.Table;"*/
out.println "import java.io.Serializable;"
out.println "import lombok.Data;"
out.println "import org.hibernate.annotations.GenericGenerator;"
/*out.println "import lombok.AllArgsConstructor;"
out.println "import lombok.Builder;"
out.println "import lombok.NoArgsConstructor;"*/
Set types = new HashSet()
fields.each() {
types.add(it.type)
}
if (types.contains("Date")) {
out.println "import java.util.Date;"
}
if (types.contains("InputStream")) {
out.println "import java.io.InputStream;"
}
out.println ""
// 添加类注释
out.println "/**"
// 如果添加了表注释，会加到类注释上
if (isNotEmpty(table.getComment())) {
out.println " * " + table.getComment()
}
out.println " *"
out.println " * @author Eric.Lee"
out.println " * @since " + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())
out.println " */"
out.println "@Data"
out.println "@Entity"
out.println "@Table(name = ""+table.getName() +"")"
out.println "public class $className implements Serializable {"
out.println genSerialID()
// 判断自增
/*if ((tableName + "_id").equalsIgnoreCase(fields[0].colName) || "id".equalsIgnoreCase(fields[0].colName)) {
out.println " @Id"
out.println " @GeneratedValue(generator = "idGenerator")"
out.println " @GenericGenerator(name = "idGenerator", strategy = ChiticCoreConstant.ID_GENERATOR_COMMON)"
}*/
fields.each() {
out.println ""
// 输出注释
if (isNotEmpty(it.commoent)) {
out.println " /**"
out.println " * ${it.commoent.toString()}"
out.println " */"
}
if (it.annos != ""){
if (it.annos.contains("[@Id]")){
out.println " @Id"
out.println " @GeneratedValue(generator = "idGenerator")"
out.println " @GenericGenerator(name = "idGenerator", strategy = "uuid")"
}
out.println " ${it.annos.replace("[@Id]", "")}"
}
// 输出成员变量
out.println " private ${it.type} ${it.name};"
}
// 输出get/set方法
// fields.each() {
// out.println ""
// out.println " public ${it.type} get${it.name.capitalize()}() {"
// out.println " return this.${it.name};"
// out.println " }"
// out.println ""
//
// out.println " public void set${it.name.capitalize()}(${it.type} ${it.name}) {"
// out.println " this.${it.name} = ${it.name};"
// out.println " }"
// }
out.println ""
out.println "}"
}
def calcFields(table) {
DasUtil.getColumns(table).reduce([]) { fields, col ->
def spec = Case.LOWER.apply(col.getDataType().getSpecification())
def typeStr = typeMapping.find { p, t -> p.matcher(spec).find() }.value
def comm =[
colName : col.getName(),
name : javaName(col.getName(), false),
type : typeStr,
commoent: col.getComment(),
annos: " @Column(name = ""+col.getName()+"")"]
if("id".equals(Case.LOWER.apply(col.getName())))
comm.annos +=["@Id"]
fields += [comm]
}
}
// 处理类名（这里是因为我的表都是以t_命名的，所以需要处理去掉生成类名时的开头的T，
// 如果你不需要那么请查找用到了 javaClassName这个方法的地方修改为 javaName 即可）
def javaClassName(str, capitalize) {
def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
.collect { Case.LOWER.apply(it).capitalize() }
.join("")
.replaceAll(/[^p{javaJavaIdentifierPart}[_]]/, "_")
// 去除开头的T http://developer.51cto.com/art/200906/129168.htm
s = s[1..s.size() - 1]
capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1]
}
def javaName(str, capitalize) {
// def s = str.split(/(?<=[^p{IsLetter}])/).collect { Case.LOWER.apply(it).capitalize() }
// .join("").replaceAll(/[^p{javaJavaIdentifierPart}]/, "_")
// capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1]
def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
.collect { Case.LOWER.apply(it).capitalize() }
.join("")
.replaceAll(/[^p{javaJavaIdentifierPart}[_]]/, "_")
capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1]
}
def isNotEmpty(content) {
return content != null && content.toString().trim().length() > 0
}
static String changeStyle(String str, boolean toCamel){
if(!str || str.size() <= 1)
return str
if(toCamel){
String r = str.toLowerCase().split('_').collect{cc -> Case.LOWER.apply(cc).capitalize()}.join('')
return r[0].toLowerCase() + r[1..-1]
}else{
str = str[0].toLowerCase() + str[1..-1]
return str.collect{cc -> ((char)cc).isUpperCase() ? '_' + cc.toLowerCase() : cc}.join('')
}
}
static String genSerialID()
{
return " private static final long serialVersionUID = "+Math.abs(new Random().nextLong())+"L;"
}