fix: 修复若干问题，添加java lsp

backend/jdt-language-server-1.57.0-202602111032/jdtls.bat

@@ -0,0 +1,51 @@
+@echo off
+setlocal
+
+REM ============================================================
+REM  JDTLS wrapper for LSP Gateway (stdio mode)
+REM  Put this script somewhere in PATH, or use full path in config
+REM ============================================================
+
+REM --- JDTLS install location (auto-detect from this script's directory) ---
+set "JDTLS_HOME=%~dp0"
+if "%JDTLS_HOME:~-1%"=="\" set "JDTLS_HOME=%JDTLS_HOME:~0,-1%"
+
+REM --- Java (change this if needed) ---
+if defined JAVA_HOME (
+    set "JAVA=%JAVA_HOME%\bin\java.exe"
+) else (
+    set "JAVA=java"
+)
+
+REM --- Find launcher JAR ---
+for %%f in ("%JDTLS_HOME%\plugins\org.eclipse.equinox.launcher_*.jar") do (
+    set "LAUNCHER=%%f"
+)
+
+REM --- Config directory ---
+set "CONFIG_DIR=%JDTLS_HOME%\config_win"
+
+REM --- Workspace: use per-instance workspace to avoid lock conflicts ---
+REM    Supports JDTLS_WORKSPACE env var for explicit override.
+if defined JDTLS_WORKSPACE (
+    set "WORKSPACE_DIR=%JDTLS_WORKSPACE%"
+) else (
+    set "WORKSPACE_DIR=%TEMP%\jdtls-ws-%RANDOM%%RANDOM%"
+)
+if not exist "%WORKSPACE_DIR%" mkdir "%WORKSPACE_DIR%"
+
+REM --- Launch JDTLS in stdio mode ---
+"%JAVA%" ^
+    -Declipse.application=org.eclipse.jdt.ls.core.id1 ^
+    -Dosgi.bundles.defaultStartLevel=4 ^
+    -Declipse.product=org.eclipse.jdt.ls.core.product ^
+    -Dlog.level=ALL ^
+    -Xmx1G ^
+    --add-modules=ALL-SYSTEM ^
+    --add-opens java.base/java.util=ALL-UNNAMED ^
+    --add-opens java.base/java.lang=ALL-UNNAMED ^
+    -jar "%LAUNCHER%" ^
+    -configuration "%CONFIG_DIR%" ^
+    -data "%WORKSPACE_DIR%"
+
+endlocal