[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; U7/ =|Z
} 'S74Ys=-0
int i1=l; Nf* .r
int i2=mid+1; D|$0~1y
for(int cur=l;cur<=r;cur++){ F@ pf._c
if(i1==mid+1) K&{ _s
data[cur]=temp[i2++]; |;aZi?Ek[
else if(i2>r) "ivVIq2
data[cur]=temp[i1++]; jp}.W
else if(temp[i1] data[cur]=temp[i1++]; BINHCZ
else =^Ws/k
data[cur]=temp[i2++]; FmF[S&gFRs
} uF3{FYM{I
} Exv!!0Cd^
iu{;|E
} VR_/Vh]@
AK'3N1l`
改进后的归并排序: m=COF$<
I5[@C<b
package org.rut.util.algorithm.support; o*d(;
+7lr#AvU/
import org.rut.util.algorithm.SortUtil; c>c4IQ&d
wj'fdrY5h
/** )BaGY
* @author treeroot J^DyhCs
* @since 2006-2-2 A? jaS9 &)
* @version 1.0 pcOKC0b.
*/ pE+:tMH;
public class ImprovedMergeSort implements SortUtil.Sort { H,EZ% Gl
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private static final int THRESHOLD = 10; ??#EG{{
;*nzb!u\\
/* DH$Nz
* (non-Javadoc) K'Wv$[~Dc
* ;sUvY*Bcm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cw0@Z0
*/ #jxPh!%9
public void sort(int[] data) { p}I\H ^"8+
int[] temp=new int[data.length]; D'D IC
mergeSort(data,temp,0,data.length-1); 4u0?[v[Hu
} Ps0<CUyI
eLHhfu;k
private void mergeSort(int[] data, int[] temp, int l, int r) { e<A>??h^
int i, j, k; ox.kL
int mid = (l + r) / 2; MR@Qn[RdM
if (l == r) 0[uOKFgE
return; >x~Qa@s;
if ((mid - l) >= THRESHOLD) 0&kmP '
mergeSort(data, temp, l, mid); /{[tU-}qJ
else hCX/k<}I
insertSort(data, l, mid - l + 1); ?mVSc/
if ((r - mid) > THRESHOLD) u]9 #d^%V
mergeSort(data, temp, mid + 1, r); NYxL7:9
else 8U]mr+
insertSort(data, mid + 1, r - mid); 09Q5gal
nemC-4}
for (i = l; i <= mid; i++) { >wYmx4W>
temp = data; UT 7'-
} \|]+sQWQ
for (j = 1; j <= r - mid; j++) { #+h#b%8
temp[r - j + 1] = data[j + mid]; Mbly-l{|
} D#Mz#\4o
int a = temp[l]; <O-R
int b = temp[r]; Sy*p6DP
for (i = l, j = r, k = l; k <= r; k++) { j,i)ecZ>
if (a < b) { >G[:Q s
data[k] = temp[i++]; %\'G2
a = temp; l]
} else { L&|^y8
data[k] = temp[j--]; `6NcE-oJ
b = temp[j]; @L607[!?
} 8{&.[SC7
} %l%2 hvGZ
} ?d3<GhzlR3
CNWA!1n^Hy
/** "N,@J-]/k
* @param data Gt,VSpb~s
* @param l 2>CR]
* @param i HB<>x
*/ +n &8" )
private void insertSort(int[] data, int start, int len) { v`qXb$YW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5VVU%STP
} 5lwMc0{/3
} 7~N4~KAUS
} "r@G V5ED
} $RC)e7
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堆排序： Qo(<>d
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package org.rut.util.algorithm.support; 11A$#\,
5@W63!N
import org.rut.util.algorithm.SortUtil; @6;ZP1
egWfKL&iy
/** Kb/qM}jS
* @author treeroot &g8Xjx&zj
* @since 2006-2-2 02:`Joy2D
* @version 1.0 v(uNqX.BC
*/ @y eAM7
public class HeapSort implements SortUtil.Sort{ !,J]5$M
9m"EY@-
/* (non-Javadoc) urL@SeV+$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cf v1nUW
*/ EyV5FWb58
public void sort(int[] data) { &-vHb
MaxHeap h=new MaxHeap(); YQ1rS X3
h.init(data); %r(qQM.Pl
for(int i=0;i h.remove(); SapVS*yx@
System.arraycopy(h.queue,1,data,0,data.length); vZqW,GDfXo
} cwHbm%
au+:-Khm
private static class MaxHeap{ ]%G#x
Io/;+R.
void init(int[] data){ 5RF*c,cNq
this.queue=new int[data.length+1]; BISH34
for(int i=0;i queue[++size]=data; U4iVI#f
fixUp(size); je%y9*V
} ?|Wxqo
} 95/;II
A=D G+z''
private int size=0; 9'vf2) "
vNm4xa%
private int[] queue; +R8dy
m&MZn2u[4i
public int get() { xaq/L:I<
return queue[1]; Q:ql~qew
} TyR@3H
&TN.6Hm3
public void remove() { 4dI`
SortUtil.swap(queue,1,size--); b>} )G7b}
fixDown(1); iQiXwEAi[
} cA90FqUH
file://fixdown +.u HY`A
private void fixDown(int k) { \5HVX/
int j; 8SupoS
while ((j = k << 1) <= size) { T.WN9=N
if (j < size %26amp;%26amp; queue[j] j++; \MAv's4b@
if (queue[k]>queue[j]) file://不用交换 BY$L[U;@T
break; I5Rd~-="G
SortUtil.swap(queue,j,k); )~w bu2;
k = j; )L"J?wTe
} _~y-?(46K
} mF>{cVTF
private void fixUp(int k) { |uJjO>8]|
while (k > 1) { nbDjoZZ4
int j = k >> 1; !Okl3 !fC
if (queue[j]>queue[k]) ny<D1>{90
break; h;OHpvk
SortUtil.swap(queue,j,k); :vFYqoCn
k = j; {Bpu-R&T
} Ozsvsa
} AG Gxx?I
MJn=
} %^u e
^>y|{;`
} a,xy38T<
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SortUtil： :?)q"hE
H[?l)nZ}
package org.rut.util.algorithm; anH]]
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import org.rut.util.algorithm.support.BubbleSort; k+eeVy
import org.rut.util.algorithm.support.HeapSort; ]-OF3+l4
import org.rut.util.algorithm.support.ImprovedMergeSort; zpcO7AY~
import org.rut.util.algorithm.support.ImprovedQuickSort; @|d`n\%x
import org.rut.util.algorithm.support.InsertSort; j:2*hF!E
import org.rut.util.algorithm.support.MergeSort; 6""i<oR
import org.rut.util.algorithm.support.QuickSort; 1[e%E#h
import org.rut.util.algorithm.support.SelectionSort; }e>OmfxDBt
import org.rut.util.algorithm.support.ShellSort; ,Mn`kL<F
Ai`0Ud,M@
/** }%3i8e
* @author treeroot [q|8.>sB
* @since 2006-2-2 ?{OU%usQwE
* @version 1.0 lQ2vQz-J
*/ Et&PzDvU
public class SortUtil { Ol8Yf.e_
public final static int INSERT = 1; LiEDTXRz
public final static int BUBBLE = 2; W;F=7[h
public final static int SELECTION = 3; CI|#,^
public final static int SHELL = 4; @3?dI@i(
public final static int QUICK = 5; XU`vs`/
public final static int IMPROVED_QUICK = 6; "OrF81
public final static int MERGE = 7; ,,h>_IA
public final static int IMPROVED_MERGE = 8; h0-CTPQ7A
public final static int HEAP = 9; 'pT8S
?+byRoY>&g
public static void sort(int[] data) { -[z1r)RZ
sort(data, IMPROVED_QUICK); t2FA|UF
} R]d934s
private static String[] name={ jZ,=tF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <07~EP
}; fTi5Ej*/?)
$$T a
private static Sort[] impl=new Sort[]{ tG0 &0`
new InsertSort(), S6{y%K2y&
new BubbleSort(), LiJ./
new SelectionSort(), *nHkK!d<N
new ShellSort(), Gr~J-#a3~D
new QuickSort(), n?v$C:jLN
new ImprovedQuickSort(), zy8D&7Ytf
new MergeSort(), EV R>R
new ImprovedMergeSort(), zHXb[$Q
new HeapSort() A/~^4DR
}; oK2jPP
7fW$jiw
public static String toString(int algorithm){ 9lqD~H.
return name[algorithm-1]; Y>CZ
} /)V8X#,
w(q\75
public static void sort(int[] data, int algorithm) { 1HeE$
impl[algorithm-1].sort(data); JiX-t\V~
} zoau5t
!Ic~_7"
public static interface Sort { p$$0**p!`
public void sort(int[] data); t'HrI-x
} ,'@t.XP
PC& (1kJ
public static void swap(int[] data, int i, int j) { jB\Knxm v
int temp = data; :?\Je+iA
data = data[j]; a=*JyZ.2
data[j] = temp; KtaoU2s
} ['aiNhlbt
} @.h;k4TD