Support batch insert(支持批量插入)

[maxiaoguang64]

fixed290

[codecov-io]

Codecov Report

Merging #776 into dev will increase coverage by 0.04%.
The diff coverage is 68.21%.

@@            Coverage Diff             @@
##              dev     #776      +/-   ##
==========================================
+ Coverage   63.89%   63.94%   +0.04%     
==========================================
  Files         486      490       +4     
  Lines        9498     9540      +42     
  Branches     1557     1567      +10     
==========================================
+ Hits         6069     6100      +31     
- Misses       3093     3099       +6     
- Partials      336      341       +5

Impacted Files	Coverage Δ
...dbc/core/routing/router/sharding/GeneratedKey.java	100% <ø> (+71.42%)	⬆️
...e/rewrite/placeholder/InsertValuesPlaceholder.java	0% <0%> (ø)
...arsing/parser/context/insertvalue/InsertValue.java	0% <0%> (ø)
...dingjdbc/core/optimizer/OptimizeEngineFactory.java	20% <0%> (ø)	⬆️
...e/routing/type/standard/StandardRoutingEngine.java	0% <0%> (ø)	⬆️
...pter/AbstractShardingPreparedStatementAdapter.java	93.33% <100%> (+0.06%)	⬆️
...ng/parser/sql/dml/insert/AbstractInsertParser.java	90.47% <100%> (-0.44%)	⬇️
...io/shardingjdbc/core/rewrite/SQLRewriteEngine.java	96.72% <100%> (-0.08%)	⬇️
...parsing/parser/sql/dml/insert/InsertStatement.java	64.7% <100%> (+2.2%)	⬆️
...arsing/parser/clause/InsertValuesClauseParser.java	96.72% <100%> (+2.78%)	⬆️
... and 17 more

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