[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; k2EHco0BG
} $Y8>_6%+T
int i1=l; ^cYStMjpy
int i2=mid+1; <Z{vC
for(int cur=l;cur<=r;cur++){ }1QI"M*
if(i1==mid+1) 3p:=xL
data[cur]=temp[i2++]; X AQGG>
else if(i2>r) d{er|$E?
data[cur]=temp[i1++]; WMW1B}Z3
else if(temp[i1] data[cur]=temp[i1++]; &MCy.(jN
else fv|]= e
data[cur]=temp[i2++]; :]vA2
} "yg.hK`
} 5\okU"{d7
<f%ujrX
} ?n)Xw)]
3\;v5D:
改进后的归并排序: >BBl7
Fj S%n$
package org.rut.util.algorithm.support; ^;.T}c%N
DhZ:#mM{
import org.rut.util.algorithm.SortUtil; }K2 /&kZ
ODm&&W#*
/** d:A}CBTSY
* @author treeroot Z+ixRch@-s
* @since 2006-2-2 UcgG
* @version 1.0 BWWq4mdb{
*/ )IQ*
public class ImprovedMergeSort implements SortUtil.Sort { KE<kj$
^7.XGWQ)-
private static final int THRESHOLD = 10; n|WfaJQZ
tE@FvZC'=
/* T=WNBqKo]
* (non-Javadoc) ',GV6kt_k
* :Zza)>l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {V}qwm?
*/ o+NMA (
public void sort(int[] data) { -;$nb~y
int[] temp=new int[data.length]; -OrR $w|e
mergeSort(data,temp,0,data.length-1); TXjloGv^
} n0Go p^3
pV7N byb4
private void mergeSort(int[] data, int[] temp, int l, int r) { B@ {&<
int i, j, k; []zua14F6
int mid = (l + r) / 2; w]nX?S8
if (l == r) <?YA,"~
return; .oEbEs
if ((mid - l) >= THRESHOLD) u^=`%)
mergeSort(data, temp, l, mid); ;FU|7L$H
else LEZ&W;bCo
insertSort(data, l, mid - l + 1); zzJja/mp
if ((r - mid) > THRESHOLD) 'f+NW&
mergeSort(data, temp, mid + 1, r); 4J5pXlzV
else Q8q@Y R#
insertSort(data, mid + 1, r - mid); 4/'N|c.
:lgi>^
for (i = l; i <= mid; i++) { &+01+-1hW
temp = data; L2fZ{bgy
} %D`o
for (j = 1; j <= r - mid; j++) { m2xBS!fm
temp[r - j + 1] = data[j + mid]; oZN'HT
} K*Ks"Vx
int a = temp[l]; s9O2k}]
int b = temp[r]; e"k/d<
for (i = l, j = r, k = l; k <= r; k++) { \K7t'20
if (a < b) { RNWX.g)b
data[k] = temp[i++]; AOb]qc
a = temp; -:<lkq&/
} else { t>xd]ti
data[k] = temp[j--]; E7nFb:zlV
b = temp[j]; #H~_K}Ks
} 20tO#{Li
} 6o=G8y
} 19t{|w<
S_b/DO
/** @0NJ{
* @param data 0 )}$^TV
* @param l )h_8vO2
* @param i 8Lz]Z h=ZU
*/ MsOs{2 )2
private void insertSort(int[] data, int start, int len) { p?# pT}1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^U@~+dw
} Udgqkl
} lG:kAtx4
} Da.G4,vLh
} )C~9E 5E
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堆排序： O )d[8jw"
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package org.rut.util.algorithm.support; wTc)S6%7
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import org.rut.util.algorithm.SortUtil; N|usFqCNk^
f&KdlpxKv
/** G~,:2 o3
* @author treeroot vB0RKk}d5
* @since 2006-2-2 KP]"P*? ?
* @version 1.0 646JDX[o
*/ ravyiOL
public class HeapSort implements SortUtil.Sort{ eWs&J24
8LzBh_J?
/* (non-Javadoc) kz}R[7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (s<s@`
*/ g}LAks
public void sort(int[] data) { ac{?+]8}
MaxHeap h=new MaxHeap(); r6Aneg7
h.init(data); EgjR^A1W2
for(int i=0;i h.remove(); w_tJ7pz8T
System.arraycopy(h.queue,1,data,0,data.length); 4?\:{1X=
} tq1CwzRX
zi@]83SS#
private static class MaxHeap{ $g0+,ll[6
^D%Za'
void init(int[] data){ +0Q,vK#j^
this.queue=new int[data.length+1]; GLMm(
for(int i=0;i queue[++size]=data; ]`g@UtD9`
fixUp(size); Pe73g%
} dt@P>rel
} "qz3u`[o
:rMM4
private int size=0; K<`osdp=&
tJViA`@x
private int[] queue; s$ENFp7P
F,BOgWwP
public int get() { l e4?jQQ@L
return queue[1]; w'MGA
} RGKYW>$0RR
a8k;(/
public void remove() { d\{>TdyF
SortUtil.swap(queue,1,size--); {%lXYMyu
fixDown(1); K.<.cJE
} ?'86d_8
file://fixdown _|[UI.a
private void fixDown(int k) { ]V l]XT$Um
int j; t7n(Qkrv
while ((j = k << 1) <= size) { nRL. ppUI
if (j < size %26amp;%26amp; queue[j] j++; !U9|x\BqJ2
if (queue[k]>queue[j]) file://不用交换 ^z1&8k"[^
break; LEMfG~Czq
SortUtil.swap(queue,j,k); 9EDfd NN
k = j; voP7"Dl[
} &,A64y
} [[PEa-992
private void fixUp(int k) { An;MVA
while (k > 1) { ;c~cet4
int j = k >> 1; @SZM82qU2z
if (queue[j]>queue[k]) ];'v8)Y
break; Q_* "SRz
SortUtil.swap(queue,j,k); ku$$ 1xq
k = j; Bjk]ZU0T
} pyLRgD0 g
} 4wC+S9I#E^
3_~cMlr3T.
} zi`b2h
7VcmVq}X
} -~?J+o+Pr"
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SortUtil： (Yp+bS(PU*
*K> l*l(f]
package org.rut.util.algorithm; @u==x*{|
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import org.rut.util.algorithm.support.BubbleSort; ml\4xp,
import org.rut.util.algorithm.support.HeapSort; _g1b{$
import org.rut.util.algorithm.support.ImprovedMergeSort; O@p]KSfk
import org.rut.util.algorithm.support.ImprovedQuickSort; -S3MH1TZ
import org.rut.util.algorithm.support.InsertSort; \ [a%('}
import org.rut.util.algorithm.support.MergeSort; 9U$EJN_G
import org.rut.util.algorithm.support.QuickSort; W6On93sa
import org.rut.util.algorithm.support.SelectionSort; Yjx|9_|Xn
import org.rut.util.algorithm.support.ShellSort; jqPkc28
_.L4e^N&UO
/** gy&[?m6M=
* @author treeroot Q}-~O1
* @since 2006-2-2 035rPT7-2-
* @version 1.0 @|Rrf*J?%
*/ Me 5_4H&Sg
public class SortUtil { ,o)d3g-&g
public final static int INSERT = 1; }Ho Qwy|&
public final static int BUBBLE = 2; `uC@nJ
public final static int SELECTION = 3; DGzw8|/(
public final static int SHELL = 4; <=f}8a.R3
public final static int QUICK = 5; mEG#>Gg$
public final static int IMPROVED_QUICK = 6; -jMJAYjV
public final static int MERGE = 7; K)J(./
public final static int IMPROVED_MERGE = 8; "~D]E7Q3y
public final static int HEAP = 9; I1PuHf Qs
_q~=~nub
public static void sort(int[] data) { m=YU2!Mb
sort(data, IMPROVED_QUICK); ki85!k=Q2
} -wjN"g<
private static String[] name={ {GC?SaK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L'u\w
}; qAw x2fPu
mauI42
private static Sort[] impl=new Sort[]{ St e=&^
new InsertSort(), ih7/}
new BubbleSort(), V{JAB]?^
new SelectionSort(), z<yU-m2h
new ShellSort(), ^Vpq$'!
new QuickSort(), ^k]XEW{PG
new ImprovedQuickSort(), 1Z9qjV%^
new MergeSort(), b j'Xg
new ImprovedMergeSort(), Y'ow
new HeapSort() %mZ{4<7
}; zzxGAVu
t25,0<iW
public static String toString(int algorithm){ E2m8UBS
return name[algorithm-1]; qzTuxo0B
} XHK70: i
ho$+L
public static void sort(int[] data, int algorithm) { zzyHoZJP
impl[algorithm-1].sort(data); dxmE3*b`
} ll C#1
Vv ?-"\Z>
public static interface Sort { (vTtDKp@
public void sort(int[] data); ~m$Y$,uH
} sD=n95`v
ypy68_xyW
public static void swap(int[] data, int i, int j) { Nd;Ku6
int temp = data; :3I@(k\PY
data = data[j]; $fzaPD4.
data[j] = temp; ~/P&Tub^
} Iu <?&9t
} (Tbw3ENz