IDEA连接数据库
IDEA右边侧栏有个DataSource，可以通过这个来连接数据库，我们先成功连接数据库
点击进入后填写数据库进行连接，注意记得一定要去Test Connection 确保正常连接
注意，这里可能遇到没有mysql连接的jar包
解决方案：1找一个jar包放进来
2从maven仓库引进来
2的截图
选择表生成实体
选择一个表右键，选择如下选项进行生成，会弹出一个选择存放实体类路径的窗口，选择放在合适的目录下就好
自定义配置
如果发现数据库的某些字段没有转换成你需要的字段，如varbinary会自动转换成String，但你想让其转换为byte或其他类型，可以更改groovy脚本，在project中的如下位置找到groovy脚本
可以在文件的这一部分更改映射关系
如果想在生成的字段上加一些注释，可以在groovy脚本中找到generate函数，然后在其输出这里进行更改，如我在这里增加了
@TableField注解
比较完善的一个groovy脚本，可以直接粘贴内容替换原来的groovy脚本
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
//自定义包名
packageName = ""
typeMapping = [
//类型映射
(~/(?i)tinyint|smallint|mediumint/) : "Integer",
(~/(?i)int/) : "Long",
(~/(?i)bool|bit/) : "Boolean",
(~/(?i)float|double|decimal|real/) : "BigDecimal",
(~/(?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)}
}
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 javax.persistence.Id;")
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" +
" * @Title "+ table.getName()+" \n" +
" * @Description \n" +
" * @author liyuan \n" +
" * @Date "+ new SimpleDateFormat("yyyy-MM-dd").format(new Date()) + " \n" +
" */"
out.println ""
out.println "@Entity"
out.println "@Table ( name =\""+table.getName() +"\" )"
out.println "@Data"
out.println "public class $className implements Serializable {"
out.println ""
out.println genSerialID()
fields.each() {
out.println ""
//添加字段注释
if (isNotEmpty(it.commoent)) {
out.println "\t/**"
out.println "\t * ${it.commoent.toString()}"
out.println "\t */"
}
//为字段添加注解
if (it.annos != "") out.println " ${it.annos.replace("[@Id]", "")}"
//显示变量
out.println "\tprivate ${it.type} ${it.name};"
}
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 +="\n\t@Id"
fields += [comm]
}
}
def javaClassName(str, capitalize) {
def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
.collect { Case.LOWER.apply(it).capitalize() }
.join("")
.replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_")
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 = 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;"
}
