使用Go语言+IDEA+mysql 逆向生成dao 和 domain 的方法
# 参考地址：https://www.cnblogs.com/gaomanito/p/10682260.html
# 使用方式
## 第一步：安装idea:自行百度
## 第二步：Idea配置mysql 连接
+ View -> Tool Windows -> DataSource 出现数据连接页面
+ 点击 **+** 号，出现数据库连接设置，
+ name: 连接名称
+ comments: 备注
+ host:本地或者内网ip
+ user:用户名
+ password：密码
+ Database：连接数据库名称
+ url: jdbc连接
+ 注意此处如果是mysql 5.5 以上 的版本需要加入如下参数
+ **serverTimezone=UTC**
## 第三步：使用groovy逆向生成model, dao, daoxml 三种类型的文件
+ 右击连接：选中`Scripted Extendsions`
+ 选择`Go to Scripts Directory` 调转到go 语言的模板地址
+ 如果需要扩展则只需要在该文件夹内加入对应的模板即可
## 第四步：几个默认的模板
### Generate MyPOJOs.groovy文件（生成实体类）：
```go
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 = ""
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 = 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.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.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 ""
out.println "/**\n" +
" * @Description\n" +
" * @AuThorGX\n" +
" * @date "+ new SimpleDateFormat("yyyy-MM-dd").format(new Date()) + " \n" +
" */"
out.println ""
out.println "@Data"
out.println "@Entity"
out.println "@AllArgsConstructor"
out.println "@Builder"
out.println "@NoArgsConstructor"
out.println "@Table ( name =\""+table.getName() +"\" )"
out.println "public class $classNameimplements Serializable {"
out.println genSerialID()
// 判断自增
if ((tableName + "_id").equalsIgnoreCase(fields.colum) || "id".equalsIgnoreCase(fields.colum)) {
out.println "\t@Id"
out.println "\t@GeneratedValue(generator = \"idGenerator\")"
out.println "\t@GenericGenerator(name = \"idGenerator\", strategy = ChiticCoreConstant.ID_GENERATOR_COMMON)"
}
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 +=
}
}
// 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Thttp://developer.51cto.com/art/200906/129168.htm
s = s
capitalize || s.length() == 1? s : Case.LOWER.apply(s) + s
}
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) + s
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) + s
}
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.toLowerCase() + r
}else{
str = str.toLowerCase() + str
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;"
}
```
### Generate Dao.groovy文件（生成dao）：
```go
package src
import com.intellij.database.model.DasTable
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil
/*
* Available context bindings:
* SELECTION Iterable<DasObject>
* PROJECT project
* FILES files helper
*/
packageName = "**;" // 需手动配置 生成的 dao 所在包位置
FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir ->
SELECTION.filter { it instanceof DasTable }.each { generate(it, dir) }
}
def generate(table, dir) {
def baseName = javaName(table.getName(), true)
new File(dir, baseName + "Mapper.java").withPrintWriter { out -> generateInterface(out, baseName) }
}
def generateInterface(out, baseName) {
def date = new Date().format("yyyy/MM/dd")
out.println "package $packageName"
out.println "import cn.xx.entity.${baseName}Entity;" // 需手动配置
out.println "import org.springframework.stereotype.Repository;"
out.println ""
out.println "/**"
out.println " * Created on $date."
out.println " *"
out.println " * @author GX" // 可自定义
out.println " */"
out.println "@Repository"
out.println "public interface ${baseName}Dao extends BaseDao<${baseName}Entity> {" // 可自定义
out.println ""
out.println "}"
}
def javaName(str, capitalize) {
def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
.collect { Case.LOWER.apply(it).capitalize() }
.join("")
.replaceAll(/[^\p{javaJavaIdentifierPart}]/, "_")
name = capitalize || s.length() == 1 ? s : Case.LOWER.apply(s) + s
}
```
### Generate DaoXml.groovy文件（生成dao.xml）：
```go
package src
import com.intellij.database.model.DasTable
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil
/*
* Available context bindings:
* SELECTION Iterable<DasObject>
* PROJECT project
* FILES files helper
*/
// entity(dto)、mapper(dao) 与数据库表的对应关系在这里手动指明,idea Database 窗口里只能选下列配置了的 mapper
// tableName(key) :
typeMapping = [
(~/(?i)int/) : "INTEGER",
(~/(?i)float|double|decimal|real/): "DOUBLE",
(~/(?i)datetime|timestamp/) : "TIMESTAMP",
(~/(?i)date/) : "TIMESTAMP",
(~/(?i)time/) : "TIMESTAMP",
(~/(?i)/) : "VARCHAR"
]
basePackage = "com.chitic.bank.mapping" // 包名需手动填写
FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir ->
SELECTION.filter { it instanceof DasTable }.each { generate(it, dir) }
}
def generate(table, dir) {
def baseName = mapperName(table.getName(), true)
def fields = calcFields(table)
new File(dir, baseName + "Mapper.xml").withPrintWriter { out -> generate(table, out, baseName, fields) }
}
def generate(table, out, baseName, fields) {
def baseResultMap = 'BaseResultMap'
def base_Column_List = 'Base_Column_List'
def date = new Date().format("yyyy/MM/dd")
def tableName = table.getName()
def dao = basePackage + ".dao.${baseName}Mapper"
def to = basePackage + ".to.${baseName}TO"
out.println mappingsStart(dao)
out.println resultMap(baseResultMap, to, fields)
out.println sql(fields, base_Column_List)
out.println selectById(tableName, fields, baseResultMap, base_Column_List)
out.println deleteById(tableName, fields)
out.println delete(tableName, fields, to)
out.println insert(tableName, fields, to)
out.println update(tableName, fields, to)
out.println selectList(tableName, fields, to, base_Column_List, baseResultMap)
out.println mappingsEnd()
}
static def resultMap(baseResultMap, to, fields) {
def inner = ''
fields.each() {
inner += '\t\t<result column="' + it.sqlFieldName + '" jdbcType="' + it.type + '" property="' + it.name + '"/>\n'
}
return '''\t<resultMap id="''' + baseResultMap + '''" type="''' + to + '''">
<id column="id" jdbcType="INTEGER" property="id"/>
''' + inner + '''\t</resultMap>
'''
}
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
fields += [[
comment : col.getComment(),
name : mapperName(col.getName(), false),
sqlFieldName: col.getName(),
type : typeStr,
annos : ""]]
}
}
def mapperName(str, capitalize) {
def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
.collect { Case.LOWER.apply(it).capitalize() }
.join("")
.replaceAll(/[^\p{javaJavaIdentifierPart}]/, "_")
name = capitalize || s.length() == 1 ? s : Case.LOWER.apply(s) + s
}
// ------------------------------------------------------------------------ mappings
static def mappingsStart(mapper) {
return '''<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="''' + mapper + '''">
'''
}
// ------------------------------------------------------------------------ mappings
static def mappingsEnd() {
return '''</mapper>'''
}
// ------------------------------------------------------------------------ selectById
static def selectById(tableName, fields, baseResultMap, base_Column_List) {
return '''
<select id="selectById" parameterType="java.lang.Integer" resultMap="''' + baseResultMap + '''">
select
<include refid="''' + base_Column_List + '''"/>
from ''' + tableName + '''
where id = #{id}
</select>'''
}
// ------------------------------------------------------------------------ insert
static def insert(tableName, fields, parameterType) {
return '''
<insert id="insert" parameterType="''' + parameterType + '''">
insert into ''' + tableName + '''
<trim prefix="(" suffix=")" suffixOverrides=",">
''' + testNotNullStr(fields) + '''
</trim>
<trim prefix="values (" suffix=")" suffixOverrides=",">
''' + testNotNullStrSet(fields) + '''
</trim>
</insert>
'''
}
// ------------------------------------------------------------------------ update
static def update(tableName, fields, parameterType) {
return '''
<update id="update" parameterType="''' + parameterType + '''">
update ''' + tableName + '''
<set>
''' + testNotNullStrWhere(fields) + '''
</set>
where id = #{id}
</update>'''
}
// ------------------------------------------------------------------------ deleteById
static def deleteById(tableName, fields) {
return '''
<delete id="deleteById" parameterType="java.lang.Integer">
delete
from ''' + tableName + '''
where id = #{id}
</delete>'''
}
// ------------------------------------------------------------------------ delete
static def delete(tableName, fields, parameterType) {
return '''
<delete id="delete" parameterType="''' + parameterType + '''">
delete from ''' + tableName + '''
where 1 = 1
''' + testNotNullStrWhere(fields) + '''
</delete>'''
}
// ------------------------------------------------------------------------ selectList
static def selectList(tableName, fields, parameterType, base_Column_List, baseResultMap) {
return '''
<select id="selectList" parameterType="''' + parameterType + '''" resultMap="''' + baseResultMap + '''">
select
<include refid="''' + base_Column_List + '''"/>
from ''' + tableName + '''
where 1 = 1
''' + testNotNullStrWhere(fields) + '''
order by id desc
</select>'''
}
// ------------------------------------------------------------------------ sql
static def sql(fields, base_Column_List) {
def str = '''\t<sql id="''' + base_Column_List + '''">
@inner@
</sql> '''
def inner = ''
fields.each() {
inner += ('\t\t' + it.sqlFieldName + ',\n')
}
return str.replace("@inner@", inner.substring(0, inner.length() - 2))
}
static def testNotNullStrWhere(fields) {
def inner = ''
fields.each {
inner += '''
<if test="''' + it.name + ''' != null">
and ''' + it.sqlFieldName + ''' = #{''' + it.name + '''}
</if>\n'''
}
return inner
}
static def testNotNullStrSet(fields) {
def inner = ''
fields.each {
inner += '''
<if test="''' + it.name + ''' != null">
#{''' + it.name + '''},
</if>\n'''
}
return inner
}
static def testNotNullStr(fields) {
def inner1 = ''
fields.each {
inner1 += '''
<if test = "''' + it.name + ''' != null" >
\t''' + it.sqlFieldName + ''',
</if>\n'''
}
return inner1
}
``` 可以可以🉑 对小白的我来说，看不懂这是要做啥... 感觉很牛~
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