[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; I}:/v$btM
} H\S,^)drJ?
int i1=l; S.I<Hs
int i2=mid+1; pxN'E;P-
for(int cur=l;cur<=r;cur++){ 4 qnQF]4
if(i1==mid+1) F,D&
data[cur]=temp[i2++]; 4ldN0_T5
else if(i2>r) 7+c@pEU]
data[cur]=temp[i1++]; r}991O<
else if(temp[i1] data[cur]=temp[i1++]; 41.+3VP
else @f$P*_G
data[cur]=temp[i2++]; :+6m<?R)T
} D,7! /u'
} (T^aZuuS
w8E,zH
} A=,m
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改进后的归并排序: D H/1 :H
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package org.rut.util.algorithm.support; C/E3NL8
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import org.rut.util.algorithm.SortUtil; ?]})Xf.A
Y8d%L;b[D
/** [;2v[&Po
* @author treeroot Y}Ov`ZM!r
* @since 2006-2-2 mMMu'N
* @version 1.0 * T-XslI
*/ rUyT5Vf
public class ImprovedMergeSort implements SortUtil.Sort { bNC1[GG[
l})uYae/
private static final int THRESHOLD = 10; HiWZ?G
+EFurdX\
/* []Z6<rC|
* (non-Javadoc) ]6nF>C-C
* =?}'\ >G "
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w#o<qrpHf
*/ H95VU"
public void sort(int[] data) { B1GSZUd^?0
int[] temp=new int[data.length]; {C3bCVQ]o
mergeSort(data,temp,0,data.length-1); eBP N[V
} L4dbrPE*0
J/mLB7^R
private void mergeSort(int[] data, int[] temp, int l, int r) { %~eZrG.
int i, j, k; xv)7-jlx
int mid = (l + r) / 2; 5Ph"*Rz%
if (l == r) ='mqfGRi>
return; 2^juLXc|R
if ((mid - l) >= THRESHOLD) -?GYW81Q
mergeSort(data, temp, l, mid); l[ L{m7
else 'r-a:8:t^
insertSort(data, l, mid - l + 1); UgUW4x'+
if ((r - mid) > THRESHOLD) yXkgGY5
mergeSort(data, temp, mid + 1, r); m7eO T
else yeW|Ux:
insertSort(data, mid + 1, r - mid); yyXJ_B
F:\y#U6"J
for (i = l; i <= mid; i++) { *d%m.:)N
temp = data; %Jw;c`JM
} 10a=[\ Q
for (j = 1; j <= r - mid; j++) { %7{6>6%
temp[r - j + 1] = data[j + mid]; $u`;{8
} kQj8;LU
int a = temp[l]; d+/d)cu
int b = temp[r]; *<9p88FpDU
for (i = l, j = r, k = l; k <= r; k++) { ;z&p(e
if (a < b) { =7$YBCuF
data[k] = temp[i++]; al^ yCoB
a = temp; SX;FBO(p
} else { &"d4J?io`
data[k] = temp[j--]; r<"1$K~Ka
b = temp[j]; y<5s)OehG
} 5:YtBdP
} 8I@_X~R
} ]qrO"X=
d`2VbZC`
/** V{(ve#y7`{
* @param data V+E2nJ
* @param l M T{^=F ]
* @param i @O4m-Oosi
*/ 4$.4,4+
private void insertSort(int[] data, int start, int len) { q~a6ES_lA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z<)?8tAgq
} =_TCtH
} qG~O]($
} cA_v*`YL
} FCOSgEU
sfx:j~bsL
堆排序： Ll&Y_Ry
&L+u]&!6C
package org.rut.util.algorithm.support; GT*\gZ
B<+}_3.
import org.rut.util.algorithm.SortUtil; IUI>/87u
3dC8MKPq0
/** 1!,lI?j,
* @author treeroot HSyohP87
* @since 2006-2-2 }>SHTHVye
* @version 1.0 WtdWD_\%Y\
*/ y%iN9 -t
public class HeapSort implements SortUtil.Sort{ fU$zG"a_
xpUaFb
/* (non-Javadoc) tZ4W]od
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )PR{ia64;<
*/ Z1*y$=D?3[
public void sort(int[] data) { o D^],
MaxHeap h=new MaxHeap(); ba|~B8rII[
h.init(data); _G[5S-0 [
for(int i=0;i h.remove(); 1P&c:n
System.arraycopy(h.queue,1,data,0,data.length); R$NH [Tz
} WCU[]A
Wrt3p-N"D
private static class MaxHeap{ HlLF<k~}
NNSn]LP
void init(int[] data){ o9>r -
this.queue=new int[data.length+1]; F@&q4whaVD
for(int i=0;i queue[++size]=data; OyFBM>6gh
fixUp(size); ^-mz!{
} T|r@:t[
} S+_}=25
vlx wt~
private int size=0; OY/QA
ss |<\DE+
private int[] queue; omY%sQ{)
<(;"L<?D<C
public int get() { s+^YGB
return queue[1]; mJ[LmQ<:
} 'V .4Nhd
Spt[b.4mF
public void remove() { 8qo{%
SortUtil.swap(queue,1,size--); OP%h`
fixDown(1); ;OE{&
} NC|&7qQ
file://fixdown |$^,e%bE
private void fixDown(int k) { 1u'x|Un
int j; d{I|4h
while ((j = k << 1) <= size) { ?}lgwKBHl;
if (j < size %26amp;%26amp; queue[j] j++; @4_W}1W
if (queue[k]>queue[j]) file://不用交换 @UE0.R<
break; nSmYa7
SortUtil.swap(queue,j,k); kR9G;IZ8s
k = j; 2r<UYB
} K4snpuhC
} hPP+lqY[
private void fixUp(int k) { AZxOq !B
while (k > 1) { ,r+=>vre
int j = k >> 1; kjJ\7x6M
if (queue[j]>queue[k]) rN8 ZQiJC
break; G{$9e}#
SortUtil.swap(queue,j,k); t&eY+3y,T
k = j; zH}u9IR3`
} D3vdO2H
} ,m9Nd "6\
A:0
} L*Xn!d%
e*:[#LJ]C
} e#)}.
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SortUtil： +);o{wfW
"-90:"W
package org.rut.util.algorithm; }ZlJ
YLJH?=2@
import org.rut.util.algorithm.support.BubbleSort; n +`(R]Q
import org.rut.util.algorithm.support.HeapSort; R1\cAP^0
import org.rut.util.algorithm.support.ImprovedMergeSort; Y:ZI9JK?
import org.rut.util.algorithm.support.ImprovedQuickSort; X_!Sm
import org.rut.util.algorithm.support.InsertSort; ;xXHSxa:=W
import org.rut.util.algorithm.support.MergeSort; b8feo'4Z
import org.rut.util.algorithm.support.QuickSort; #AFr@n
import org.rut.util.algorithm.support.SelectionSort; 0+m"eGwTm
import org.rut.util.algorithm.support.ShellSort; `LVXK|m+$
ZZ)bTLu
/** #$e~o}(r
* @author treeroot *Iyv${
* @since 2006-2-2 Oh5(8.<y
* @version 1.0 'h([Y8p{
*/ f@Hp,-
public class SortUtil { ?,;|*A
public final static int INSERT = 1; +g@@|&B
public final static int BUBBLE = 2; !D7[R'RgY
public final static int SELECTION = 3; e(6g|h
public final static int SHELL = 4; '[{M"S
public final static int QUICK = 5; 9L*gxI>
public final static int IMPROVED_QUICK = 6; ,iB)8Km@U
public final static int MERGE = 7; [="moh2*f
public final static int IMPROVED_MERGE = 8; GL.& g{$#+
public final static int HEAP = 9; ^Qs-@]E-
{uDL"~^\
public static void sort(int[] data) { ak;fCx&
sort(data, IMPROVED_QUICK); jgVra*
} XCDHd ?Ld
private static String[] name={ plv"/KJM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `[C8iF*Y"
}; AFc#2wn
s[SzE6eQ`l
private static Sort[] impl=new Sort[]{ U^snb6\5
new InsertSort(), (uD(,3/Cw
new BubbleSort(), ,.x5
new SelectionSort(), @$F(({?
new ShellSort(), acRPKTs H
new QuickSort(), jgs kK
new ImprovedQuickSort(), 6jO*rseC
new MergeSort(), d&n0:xOc
new ImprovedMergeSort(), +[zrU`!@
new HeapSort() #Z"N\49
}; @R9
0v,DQJ?w8
public static String toString(int algorithm){ 44 o5I:
return name[algorithm-1]; ;_F iiBk7(
} t'Nu^_#
|0b$60m$!t
public static void sort(int[] data, int algorithm) { GQ$0`?lp
impl[algorithm-1].sort(data); aGr(djD
} }^pnwo9vV
_(0!bUs>
public static interface Sort { |U8;25Y
public void sort(int[] data); w-HgC
} {MO`0n; rt
[f:>tRdH
public static void swap(int[] data, int i, int j) { qF%wl
int temp = data; &bRmr/D
data = data[j]; QtW5;A-h
data[j] = temp; /ZvNgaH5M
} hOO)0IrIM*
} Z5bmqhDo[