1，idea连接mysql数据库
2，右键数据库表格，打开代码生成器规则文件地址
3，在文件夹下新建新建MyGenerate POJOs.groovy
4，自定义MyGenerate POJOs.groovy
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
/*
* Available context bindings:
* SELECTION Iterable<DasObject>
* PROJECT project
* FILES files helper
*/
packageName = "com.n22.cs.drp.model"
typeMapping = [
(~/(?i)tinyint|smallint|mediumint/) : "Integer",
(~/(?i)int/) : "Long",
(~/(?i)bool|bit/) : "Boolean",
(~/(?i)float|double|decimal|real/) : "Double",
(~/(?i)datetime|timestamp|date|time/) : "Date",
(~/(?i)blob|binary|bfile|clob|raw|image/): "InputStream",
(~/(?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 = 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) {
out.println "package $packageName"
out.println ""
out.println "import javax.persistence.Column;"
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 lombok.AllArgsConstructor;"
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 ""
out.println "/**\n" +
" * @Description \n" +
" * @Author zhulei\n" +
" * @Date "+ new SimpleDateFormat("yyyy-MM-dd").format(new Date()) + " \n" +
" */"
out.println ""
out.println "@Data"
out.println "@AllArgsConstructor"
out.println "@NoArgsConstructor"
out.println "@Entity"
out.println "@Table ( name =\""+table.getName() +"\" )"
out.println "public class $className implements Serializable {"
out.println ""
out.println genSerialID()
fields.each() {
out.println ""
// 输出注释
if (isNotEmpty(it.commoent)) {
out.println "\t/**"
out.println "\t * ${it.commoent.toString()}"
out.println "\t */"
}
if (it.annos != "") out.println " ${it.annos.replace("[@Id]", "")}"
// 输出成员变量
out.println "\tprivate ${it.type} ${it.name};"
}
// 输出get/set方法
// fields.each() {
// out.println ""
// out.println "\tpublic ${it.type} get${it.name.capitalize()}() {"
// out.println "\t\treturn this.${it.name};"
// out.println "\t}"
// out.println ""
//
// out.println "\tpublic void set${it.name.capitalize()}(${it.type} ${it.name}) {"
// out.println "\t\tthis.${it.name} = ${it.name};"
// out.println "\t}"
// }
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: "\t@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 "\tprivate static final long serialVersionUID = "+Math.abs(new Random().nextLong())+"L;"
}
5，通过自定义规则生成代码
6，想要有@Data，@Entity和@ Column注释，请加入lombok和persistence-api依赖
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
</dependency>
7，生成POJO效果如下
package com.n22.cs.drp.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Table;
import java.io.Serializable;
import lombok.Data;
/**
* @Description
* @Author zhulei
* @Date 2020-07-08
*/
@Data
@Entity
@Table ( name ="tr_dept_eleme_mapping" )
public class TrDeptElemeMappingEntity implements Serializable {
private static final long serialVersionUID = 6224989432472255038L;
/**
* 部门内部代码
*/
@Column(name = "inner_code" )
private String innerCode;
/**
* 饿了么对应的商铺Id
*/
@Column(name = "shop_id" )
private String shopId;
/**
* 达达商铺号
*/
@Column(name = "dada_shop_id" )
private String dadaShopId;
/**
* 权重-占的百分比
*/
@Column(name = "proportion" )
private Long proportion;
/**
* 关联的内代码
*/
@Column(name = "rela_inner_code" )
private String relaInnerCode;
/**
* 蜂鸟对应的门店Id
*/
@Column(name = "fengniao_shop_id" )
private String fengniaoShopId;
/**
* 美团对应的门店Id
*/
@Column(name = "meituan_shop_id" )
private String meituanShopId;
/**
* 配送时间(针对预订单)
*/
@Column(name = "delivery_time" )
private String deliveryTime;
/**
* 1-饿了么 2-美团
*/
@Column(name = "source_type" )
private String sourceType;
}