Mybatis中Generator代码生成工具 实例解析
1.当前项目使用的Mybatis框架,如果新建表则 需要使用到Mybatis的 Generator工具 生成相关代码(dao接口 xml配置文件 entity实体类),之前只知道怎么用,借着现在这个机会 研究下Generator这个工具怎么用的.Mybatis中的Generator官网地址如
http://www.mybatis.org/generator/index.html.
3.Mybatis中存在多种运行Generator的方式,这里采用最通用的java方式.具体示例代码如下 这里扩展了Generator的生成器,添加了ProgressCallback长时间进程回调,需要在扩展生成器MyGenerator中的generate方法 调用该ProgressCallback接口实例,具体在官网中也有讲到.
GenMybatis 生成器
package com.bxd.core.util;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.ProgressCallback;
import org.mybatis.generator.api.VerboseProgressCallback;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
import com.bxd.core.support.MyGenerator;
public class GenMybatis {
public static void main(String[] args) {
List warnings = new ArrayList();
boolean overwrite = true;
String filePath = ClassLoader.getSystemResource("config/generatorConfig.xml").getPath();
System.out.println(filePath);
File configFile = new File(filePath);
Configuration config;
try {
ConfigurationParser cp = new ConfigurationParser(warnings);
config = cp.parseConfiguration(configFile);
DefaultShellCallback shellCallback = new DefaultShellCallback(overwrite);
MyGenerator myBatisGenerator = new MyGenerator(config, shellCallback, warnings);
ProgressCallback progressCallback = new VerboseProgressCallback();//扩展mybatis生成器,实现长时间线程回调通知,重写generate方法
myBatisGenerator.generate(progressCallback);
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
}
MyGenerator 扩展生成器类
package com.bxd.core.support;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.mybatis.generator.api.GeneratedJavaFile;
import org.mybatis.generator.api.GeneratedXmlFile;
import org.mybatis.generator.api.ProgressCallback;
import org.mybatis.generator.api.ShellCallback;
import org.mybatis.generator.codegen.RootClassInfo;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.Context;
import org.mybatis.generator.config.MergeConstants;
import org.mybatis.generator.exception.InvalidConfigurationException;
import org.mybatis.generator.exception.ShellException;
import org.mybatis.generator.internal.DefaultShellCallback;
import org.mybatis.generator.internal.NullProgressCallback;
import org.mybatis.generator.internal.ObjectFactory;
import org.mybatis.generator.internal.XmlFileMergerJaxp;
import org.mybatis.generator.internal.util.ClassloaderUtility;
import org.mybatis.generator.internal.util.messages.Messages;
public class MyGenerator {
/** The configuration. */
private Configuration configuration;
/** The shell callback. */
private ShellCallback shellCallback;
/** The generated java files. */
private List generatedJavaFiles;
/** The generated xml files. */
private List generatedXmlFiles;
/** The warnings. */
private List warnings;
/** The projects. */
private Set projects;
/**
* Constructs a MyBatisGenerator object.
*
* @param configuration
* The configuration for this invocation
* @param shellCallback
* an instance of a ShellCallback interface. You may specify
* null in which case the DefaultShellCallback will
* be used.
* @param warnings
* Any warnings generated during execution will be added to this
* list. Warnings do not affect the running of the tool, but they
* may affect the results. A typical warning is an unsupported
* data type. In that case, the column will be ignored and
* generation will continue. You may specify null if
* you do not want warnings returned.
* @throws InvalidConfigurationException
* if the specified configuration is invalid
*/
public MyGenerator(Configuration configuration, ShellCallback shellCallback,
List warnings) throws InvalidConfigurationException {
super();
if (configuration == null) {
throw new IllegalArgumentException(Messages.getString("RuntimeError.2")); //$NON-NLS-1$
} else {
this.configuration = configuration;
}
if (shellCallback == null) {
this.shellCallback = new DefaultShellCallback(false);
} else {
this.shellCallback = shellCallback;
}
if (warnings == null) {
this.warnings = new ArrayList();
} else {
this.warnings = warnings;
}
generatedJavaFiles = new ArrayList();
generatedXmlFiles = new ArrayList();
projects = new HashSet();
this.configuration.validate();
}
/**
* This is the main method for generating code. This method is long running, but progress can be provided and the
* method can be canceled through the ProgressCallback interface. This version of the method runs all configured
* contexts.
*
* @param callback
* an instance of the ProgressCallback interface, or null if you do not require progress
* information
* @throws SQLException
* the SQL exception
* @throws IOException
* Signals that an I/O exception has occurred.
* @throws InterruptedException
* if the method is canceled through the ProgressCallback
*/
public void generate(ProgressCallback callback) throws SQLException,
IOException, InterruptedException {
generate(callback, null, null, true);
}
/**
* This is the main method for generating code. This method is long running, but progress can be provided and the
* method can be canceled through the ProgressCallback interface.
*
* @param callback
* an instance of the ProgressCallback interface, or null if you do not require progress
* information
* @param contextIds
* a set of Strings containing context ids to run. Only the contexts with an id specified in this list
* will be run. If the list is null or empty, than all contexts are run.
* @throws SQLException
* the SQL exception
* @throws IOException
* Signals that an I/O exception has occurred.
* @throws InterruptedException
* if the method is canceled through the ProgressCallback
*/
public void generate(ProgressCallback callback, Set contextIds)
throws SQLException, IOException, InterruptedException {
generate(callback, contextIds, null, true);
}
/**
* This is the main method for generating code. This method is long running, but progress can be provided and the
* method can be cancelled through the ProgressCallback interface.
*
* @param callback
* an instance of the ProgressCallback interface, or null if you do not require progress
* information
* @param contextIds
* a set of Strings containing context ids to run. Only the contexts with an id specified in this list
* will be run. If the list is null or empty, than all contexts are run.
* @param fullyQualifiedTableNames
* a set of table names to generate. The elements of the set must be Strings that exactly match what's
* specified in the configuration. For example, if table name = "foo" and schema = "bar", then the fully
* qualified table name is "foo.bar". If the Set is null or empty, then all tables in the configuration
* will be used for code generation.
* @throws SQLException
* the SQL exception
* @throws IOException
* Signals that an I/O exception has occurred.
* @throws InterruptedException
* if the method is canceled through the ProgressCallback
*/
public void generate(ProgressCallback callback, Set contextIds,
Set fullyQualifiedTableNames) throws SQLException,
IOException, InterruptedException {
generate(callback, contextIds, fullyQualifiedTableNames, true);
}
/**
* This is the main method for generating code. This method is long running, but progress can be provided and the
* method can be cancelled through the ProgressCallback interface.
*
* @param callback
* an instance of the ProgressCallback interface, or null if you do not require progress
* information
* @param contextIds
* a set of Strings containing context ids to run. Only the contexts with an id specified in this list
* will be run. If the list is null or empty, than all contexts are run.
* @param fullyQualifiedTableNames
* a set of table names to generate. The elements of the set must be Strings that exactly match what's
* specified in the configuration. For example, if table name = "foo" and schema = "bar", then the fully
* qualified table name is "foo.bar". If the Set is null or empty, then all tables in the configuration
* will be used for code generation.
* @param writeFiles
* if true, then the generated files will be written to disk. If false,
* then the generator runs but nothing is written
* @throws SQLException
* the SQL exception
* @throws IOException
* Signals that an I/O exception has occurred.
* @throws InterruptedException
* if the method is canceled through the ProgressCallback
*/
public void generate(ProgressCallback callback, Set contextIds,
Set fullyQualifiedTableNames, boolean writeFiles) throws SQLException,
IOException, InterruptedException {
if (callback == null) {
callback = new NullProgressCallback();
}
generatedJavaFiles.clear();
generatedXmlFiles.clear();
ObjectFactory.reset();
RootClassInfo.reset();
// calculate the contexts to run
List contextsToRun;
if (contextIds == null || contextIds.size() == 0) {
contextsToRun = configuration.getContexts();
} else {
contextsToRun = new ArrayList();
for (Context context : configuration.getContexts()) {
if (contextIds.contains(context.getId())) {
contextsToRun.add(context);
}
}
}
// setup custom classloader if required
if (configuration.getClassPathEntries().size() > 0) {
ClassLoader classLoader = ClassloaderUtility.getCustomClassloader(configuration.getClassPathEntries());
ObjectFactory.addExternalClassLoader(classLoader);
}
// now run the introspections...
int totalSteps = 0;
for (Context context : contextsToRun) {
totalSteps += context.getIntrospectionSteps();
}
callback.introspectionStarted(totalSteps);
for (Context context : contextsToRun) {
context.introspectTables(callback, warnings,
fullyQualifiedTableNames);
}
// now run the generates
totalSteps = 0;
for (Context context : contextsToRun) {
totalSteps += context.getGenerationSteps();
}
callback.generationStarted(totalSteps);
for (Context context : contextsToRun) {
context.generateFiles(callback, generatedJavaFiles,
generatedXmlFiles, warnings);
}
// now save the files
if (writeFiles) {
callback.saveStarted(generatedXmlFiles.size()
+ generatedJavaFiles.size());
for (GeneratedXmlFile gxf : generatedXmlFiles) {
projects.add(gxf.getTargetProject());
writeGeneratedXmlFile(gxf, callback);
}
for (GeneratedJavaFile gjf : generatedJavaFiles) {
projects.add(gjf.getTargetProject());
writeGeneratedJavaFile(gjf, callback);
}
for (String project : projects) {
shellCallback.refreshProject(project);
}
}
callback.done();
}
private void writeGeneratedJavaFile(GeneratedJavaFile gjf, ProgressCallback callback)
throws InterruptedException, IOException {
File targetFile;
String source;
try {
File directory = shellCallback.getDirectory(gjf
.getTargetProject(), gjf.getTargetPackage());
targetFile = new File(directory, gjf.getFileName());
if (targetFile.exists()) {
if (shellCallback.isMergeSupported()) {
source = this.shellCallback.mergeJavaFile(gjf.getFormattedContent(), targetFile.getAbsolutePath(),
MergeConstants.OLD_ELEMENT_TAGS, gjf.getFileEncoding());
} else if (shellCallback.isOverwriteEnabled()) {
source = gjf.getFormattedContent();
warnings.add(Messages.getString("Warning.11", //$NON-NLS-1$
targetFile.getAbsolutePath()));
} else {
source = gjf.getFormattedContent();
targetFile = getUniqueFileName(directory, gjf
.getFileName());
warnings.add(Messages.getString(
"Warning.2", targetFile.getAbsolutePath())); //$NON-NLS-1$
}
} else {
source = gjf.getFormattedContent();
}
callback.checkCancel();
callback.startTask(Messages.getString(
"Progress.15", targetFile.getName())); //$NON-NLS-1$
writeFile(targetFile, source, gjf.getFileEncoding());
} catch (ShellException e) {
warnings.add(e.getMessage());
}
}
private void writeGeneratedXmlFile(GeneratedXmlFile gxf, ProgressCallback callback)
throws InterruptedException, IOException {
File targetFile;
String source;
try {
File directory = shellCallback.getDirectory(gxf
.getTargetProject(), gxf.getTargetPackage());
targetFile = new File(directory, gxf.getFileName());
if (targetFile.exists()) {
boolean merge = false;
if (merge) {
source = XmlFileMergerJaxp.getMergedSource(gxf,
targetFile);
} else if (shellCallback.isOverwriteEnabled()) {
source = gxf.getFormattedContent();
warnings.add(Messages.getString("Warning.11", //$NON-NLS-1$
targetFile.getAbsolutePath()));
} else {
source = gxf.getFormattedContent();
targetFile = getUniqueFileName(directory, gxf
.getFileName());
warnings.add(Messages.getString(
"Warning.2", targetFile.getAbsolutePath())); //$NON-NLS-1$
}
} else {
source = gxf.getFormattedContent();
}
callback.checkCancel();
callback.startTask(Messages.getString(
"Progress.15", targetFile.getName())); //$NON-NLS-1$
writeFile(targetFile, source, "UTF-8"); //$NON-NLS-1$
} catch (ShellException e) {
warnings.add(e.getMessage());
}
}
/**
* Writes, or overwrites, the contents of the specified file.
*
* @param file
* the file
* @param content
* the content
* @param fileEncoding
* the file encoding
* @throws IOException
* Signals that an I/O exception has occurred.
*/
private void writeFile(File file, String content, String fileEncoding) throws IOException {
FileOutputStream fos = new FileOutputStream(file, false);
OutputStreamWriter osw;
if (fileEncoding == null) {
osw = new OutputStreamWriter(fos);
} else {
osw = new OutputStreamWriter(fos, fileEncoding);
}
BufferedWriter bw = new BufferedWriter(osw);
bw.write(content);
bw.close();
}
/**
* Gets the unique file name.
*
* @param directory
* the directory
* @param fileName
* the file name
* @return the unique file name
*/
private File getUniqueFileName(File directory, String fileName) {
File answer = null;
// try up to 1000 times to generate a unique file name
StringBuilder sb = new StringBuilder();
for (int i = 1; i < 1000; i++) {
sb.setLength(0);
sb.append(fileName);
sb.append('.');
sb.append(i);
File testFile = new File(directory, sb.toString());
if (!testFile.exists()) {
answer = testFile;
break;
}
}
if (answer == null) {
throw new RuntimeException(Messages.getString(
"RuntimeError.3", directory.getAbsolutePath())); //$NON-NLS-1$
}
return answer;
}
/**
* Returns the list of generated Java files after a call to one of the generate methods.
* This is useful if you prefer to process the generated files yourself and do not want
* the generator to write them to disk.
*
* @return the list of generated Java files
*/
public List getGeneratedJavaFiles() {
return generatedJavaFiles;
}
/**
* Returns the list of generated XML files after a call to one of the generate methods.
* This is useful if you prefer to process the generated files yourself and do not want
* the generator to write them to disk.
*
* @return the list of generated XML files
*/
public List getGeneratedXmlFiles() {
return generatedXmlFiles;
}
}
3.运行Generator类 需要相关的generatorConfig.xml配置文件,主要是javaModelGenerator实体类生成位置,sqlMapGenerator实体类映射配置文件位置,javaClientGenerator 映射接口文件位置,jdbc加载相关驱动,自定义插件(如批量更新,批量删除功能等).生成哪张表的代码
4.上面配置文件中提到的 BatchInsertPlugin批量插入,BatchUpdatePlugin批量更新插件属于自定义的,而SerializablePlugin是属于Mybatis提供的拆件(作用是实现序列化接口).其中自定义插件需要继承PluginAdapter插件扩展适配器类.主要是重写生成model实体类,xml配置文件,映射接口的方法.具体代码如下
BatchInsertPlugin
package com.bxd.core.plugin;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.api.dom.OutputUtilities;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.Interface;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.Document;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
public class BatchInsertPlugin extends PluginAdapter {
public BatchInsertPlugin() {
super();
}
public boolean validate(List paramList) {
return true;
}
public boolean clientGenerated(Interface interfaze, TopLevelClass topLevelClass,
IntrospectedTable introspectedTable) {
generateBatchInsert(interfaze, introspectedTable);
return super.clientGenerated(interfaze, topLevelClass, introspectedTable);
}
public boolean sqlMapDocumentGenerated(Document document, IntrospectedTable introspectedTable) {
String tableName = introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime();//数据库表名
List columns = new ArrayList();
XmlElement parentElement = document.getRootElement();
XmlElement batchInsertElement = new XmlElement("insert");
batchInsertElement.addAttribute(new Attribute("id", "batchInsert"));
batchInsertElement.addAttribute(new Attribute("parameterType", "list"));
StringBuilder sql = new StringBuilder("insert into "+ tableName +"\n");
OutputUtilities.xmlIndent(sql, 3);
sql.append("(");
StringBuilder cols = new StringBuilder("");
StringBuilder vals = new StringBuilder("");
columns = introspectedTable.getAllColumns();
Iterator iterator = columns.iterator();
int i = 0;
//OutputUtilities.xmlIndent(cols,3);
//OutputUtilities.xmlIndent(vals, 3);
while(iterator.hasNext()){
IntrospectedColumn column = iterator.next();
cols.append(column.getActualColumnName()).append(",");
vals.append("#{ item."+column.getJavaProperty()+", jdbcType="+column.getJdbcTypeName()+"}");
vals.append(",");
i++;
if(i==3){
cols.append("\n");
vals.append("\n");
OutputUtilities.xmlIndent(cols,3);
OutputUtilities.xmlIndent(vals, 3);
i=0;
}
}
cols = cols.deleteCharAt(cols.lastIndexOf(","));
vals = vals.deleteCharAt(vals.lastIndexOf(","));
sql.append(cols.toString()).append(")\n");
OutputUtilities.xmlIndent(sql,2);
sql.append("values \n");
OutputUtilities.xmlIndent(sql,2);
sql.append(" \n");
OutputUtilities.xmlIndent(sql,3);
sql.append("( "+vals.toString()+") \n");
OutputUtilities.xmlIndent(sql,2);
sql.append(" ");
batchInsertElement.addElement(
new TextElement(
sql.toString()
));
parentElement.addElement(batchInsertElement);
return super.sqlMapDocumentGenerated(document, introspectedTable);
}
/**
* 自定义批量插入方法
* @param interfaze
* @param introspectedTable
*/
private void generateBatchInsert(Interface interfaze,IntrospectedTable introspectedTable) {
Method m = new Method("batchInsert");
m.setVisibility(JavaVisibility.PUBLIC);
m.setReturnType(FullyQualifiedJavaType.getIntInstance());
String type = "";
if(!introspectedTable.getRules().generatePrimaryKeyClass()){
type = introspectedTable.getBaseRecordType();
}
else{
type = introspectedTable.getPrimaryKeyType();
}
m.addParameter(new Parameter(new FullyQualifiedJavaType("List<"+type+">"), "list"));
context.getCommentGenerator().addGeneralMethodComment(m,
introspectedTable);
interfaze.addImportedType(FullyQualifiedJavaType.getNewListInstance());
interfaze.addImportedType(new FullyQualifiedJavaType(type));
interfaze.addMethod(m);
}
}
BatchUpdatePlugin
package com.bxd.core.plugin;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.api.dom.OutputUtilities;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.Interface;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.Document;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
/**
*
* 功能描述:自定义批量更新插件
* 模块:
* 项目:
* 版本号:V1.0
* 部门:技术研发部
* 公司:杭州白小丁科技有限公司
* 作者:丁卫江
* 邮箱:[email protected]
* 创建时间:2017年7月7日 下午3:15:49
*************************************
*************************************
* 修改人:
* 修改时间:
* 修改内容:
* 1.
* 2.
*/
public class BatchUpdatePlugin extends PluginAdapter {
public BatchUpdatePlugin(){
super();
}
public boolean validate(List paramList) {
return true;
}
public boolean clientGenerated(Interface interfaze, TopLevelClass topLevelClass,
IntrospectedTable introspectedTable) {
if(!introspectedTable.getNonPrimaryKeyColumns().isEmpty()){
generateBatchUpdate(interfaze, introspectedTable);
}
return super.clientGenerated(interfaze, topLevelClass, introspectedTable);
}
public boolean sqlMapDocumentGenerated(Document document, IntrospectedTable introspectedTable) {
String tableName = introspectedTable.getAliasedFullyQualifiedTableNameAtRuntime();//数据库表名
List columns = new ArrayList();
List primeKeys = new ArrayList();
XmlElement parentElement = document.getRootElement();
columns = introspectedTable.getNonPrimaryKeyColumns();
primeKeys = introspectedTable.getPrimaryKeyColumns();
if(!columns.isEmpty()){
XmlElement batchUpdateElement = new XmlElement("update");
batchUpdateElement.addAttribute(new Attribute("id", "batchUpdate"));
batchUpdateElement.addAttribute(new Attribute("parameterType", "list"));
StringBuilder sql = new StringBuilder("");
sql.append(" \n");
OutputUtilities.xmlIndent(sql, 3);
sql.append("update " + tableName+" \n");
OutputUtilities.xmlIndent(sql, 3);
sql.append("\n");
StringBuilder sets = new StringBuilder("");
StringBuilder keys = new StringBuilder("");
Iterator iterator = columns.iterator();
while(iterator.hasNext()){
IntrospectedColumn column = iterator.next();
OutputUtilities.xmlIndent(sets, 4);
sets.append(" \n");
OutputUtilities.xmlIndent(sets, 5);
sets.append(column.getActualColumnName() + " = #{item."+column.getJavaProperty()+", "
+ "jdbcType = "+column.getJdbcTypeName()+"},\n");
OutputUtilities.xmlIndent(sets, 4);
sets.append(" \n");
}
OutputUtilities.xmlIndent(sets, 3);
sets.append(" "+"\n");
Iterator key = primeKeys.iterator();
OutputUtilities.xmlIndent(keys, 3);
keys.append(""+"\n");
while(key.hasNext()){
IntrospectedColumn keycol = key.next();
OutputUtilities.xmlIndent(keys, 4);
keys.append("\n");
OutputUtilities.xmlIndent(keys, 5);
keys.append(" and " +keycol.getActualColumnName() + " = #{item."+keycol.getJavaProperty()+","
+ "jdbcType = "+keycol.getJdbcTypeName()+"}\n");
OutputUtilities.xmlIndent(keys, 4);
keys.append(" \n");
}
OutputUtilities.xmlIndent(keys, 3);
keys.append(" "+"\n");
sql.append(sets.toString());
sql.append(keys.toString());
OutputUtilities.xmlIndent(sql, 2);
sql.append(" ");
batchUpdateElement.addElement(
new TextElement(
sql.toString()
));
parentElement.addElement(batchUpdateElement);
}
return super.sqlMapDocumentGenerated(document, introspectedTable);
}
/**
* 自定义批量插入方法
* @param interfaze
* @param introspectedTable
*/
private void generateBatchUpdate(Interface interfaze,IntrospectedTable introspectedTable) {
Method m = new Method("batchUpdate");
m.setVisibility(JavaVisibility.PUBLIC);
m.setReturnType(FullyQualifiedJavaType.getIntInstance());
String type = "";
if(!introspectedTable.getRules().generatePrimaryKeyClass()){
type = introspectedTable.getBaseRecordType();
}
else{
type = introspectedTable.getPrimaryKeyType();
}
m.addParameter(new Parameter(new FullyQualifiedJavaType("List<"+type+">"), "list"));
context.getCommentGenerator().addGeneralMethodComment(m,
introspectedTable);
interfaze.addImportedType(FullyQualifiedJavaType.getNewListInstance());
interfaze.addImportedType(new FullyQualifiedJavaType(type));
interfaze.addMethod(m);
}
}
最后总结起来:Mybatis中的generator主要是在新增或者修改表结构的时候,初始化相关的简单CURD所需要的实体类,映射接口,映射接口配置文件.同时根据实际项目需求 添加自定义批量修改,插入组件或Mybatis提供的序列化插件,完成一些机械性代码的自动初始化.配合上重写的generator生成器 添加上需要的ProgressCallback进程进度回调类,扩展generator生成器.最后加上开源的PageHelper分页查询帮助类(需要添加到mybatis.xml配置文件中),帮助提高开发效率.
所以mybatis的generator=generator.xml+Generator运行文件+MyGenerator(扩展生成器 添加ProcessCallBack进度回调)+自定义插件(BatchInsert批量插入+BatchUpdate批量更新)+Mybatis提供的序列化拆件=完成的初始化表相关curd的功能