[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; 7_3 PM 3C
} M^\`~{*T
int i1=l; !L;_f'\)6
int i2=mid+1; vG6*[c8
for(int cur=l;cur<=r;cur++){ i{N?Y0YQs0
if(i1==mid+1) A-B>VX
data[cur]=temp[i2++]; mI<sf?.
else if(i2>r) n}Eu^^d
data[cur]=temp[i1++]; 2?LPr
else if(temp[i1] data[cur]=temp[i1++]; TT9 \m=7
else k;<@2C
data[cur]=temp[i2++]; g:~q&b[q6
} bHm/ZZx
} kK4+K74B
%n6<6t`$
} @VHstjos^V
VWt=9D;
改进后的归并排序: |g \_xl
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package org.rut.util.algorithm.support; IHCxM|/k(M
19[oXyFI
import org.rut.util.algorithm.SortUtil; _l] 0V g`
D]fgBW-
/** a{e 2*V
* @author treeroot fzVN;h
* @since 2006-2-2 o3Yb2Nw
* @version 1.0 )%p46(]
*/ H(Wiy@cJn
public class ImprovedMergeSort implements SortUtil.Sort { \s)$[pAF
X!6dg.n5
private static final int THRESHOLD = 10; j0oto6z~b
8[,R4@
/* euV!U}Xr
* (non-Javadoc) A`~?2LH,~F
* (qR;6l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vq9O|E3
*/ IDpLf*vSG
public void sort(int[] data) { `K@N\VM
int[] temp=new int[data.length]; %j@/Tx/
mergeSort(data,temp,0,data.length-1); m4uh<;C~
} P()n=&XO6
%L)QTv/
private void mergeSort(int[] data, int[] temp, int l, int r) { BE&8E\w
int i, j, k; )mAD<y+
int mid = (l + r) / 2; JgHYuLB
if (l == r) 6)=;cc{Vr
return; 6NyUGGRq
if ((mid - l) >= THRESHOLD) O%bltNEx1
mergeSort(data, temp, l, mid); vMX\q
else ~mvv :u
insertSort(data, l, mid - l + 1); n(LO`{
if ((r - mid) > THRESHOLD) [vuikJP>1k
mergeSort(data, temp, mid + 1, r); _qOynW
else H/ ejO_{
insertSort(data, mid + 1, r - mid); }jce5E
!Q_Kil.9
for (i = l; i <= mid; i++) { \I6F;G6
temp = data; I4ZbMnO
} .L^j:2(L
for (j = 1; j <= r - mid; j++) { s!D?%
temp[r - j + 1] = data[j + mid]; w(S&X"~
} `'r~3kP*NT
int a = temp[l]; 7)O+s/.P)
int b = temp[r]; p]~PyzG!
for (i = l, j = r, k = l; k <= r; k++) { Hsov0
if (a < b) { KCbOO8cQS
data[k] = temp[i++]; ('uUf!h?\
a = temp; `tT7&*Os
} else { l{?9R.L
data[k] = temp[j--]; |'o<w ]hc
b = temp[j]; GU1cMe
} mW[w4J+7P
} Ap"%%D^{:
} Q;y4yJ$wI
U4Y)Jk
/** %< ;u JP K
* @param data vKPLh
* @param l <WmjjD
* @param i .MDSP/s
*/ ['>r tV
private void insertSort(int[] data, int start, int len) { Zs0;92WL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pwSkwJ]
} 3AP=
} Yc)Dx3
} DuAix)#FN9
} pnuwjU-
N5#j}tT
堆排序： ,G?Kb#
P A*U\
package org.rut.util.algorithm.support; xf8e"mD
,0nrSJED
import org.rut.util.algorithm.SortUtil; 6r%i=z
3*7klu
/** c":2<:D&
* @author treeroot .W;cz8te
* @since 2006-2-2 RZqMpW
* @version 1.0 Xa"I
*/ )VG>6x
public class HeapSort implements SortUtil.Sort{ _~>WAm<
}a UQ#x
/* (non-Javadoc) 6&LmR75C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XdlA)0S)
*/ +g1+,?cU
public void sort(int[] data) { >#T?]5Z'MF
MaxHeap h=new MaxHeap(); (bNoe(<qU
h.init(data); 8OS^3JS3"
for(int i=0;i h.remove(); _\@zq*E
System.arraycopy(h.queue,1,data,0,data.length); ,N_V(Cx5pt
} wLfH/J
!w!k0z]
private static class MaxHeap{ %bdBg
_D+J3d(Pjk
void init(int[] data){ !iX/Ni:
this.queue=new int[data.length+1]; \|]+sQWQ
for(int i=0;i queue[++size]=data; #+h#b%8
fixUp(size); Mbly-l{|
} D#Mz#\4o
} <O-R
Y@Ry oJ
private int size=0; t!FC)iY
.UN?Ak*R
private int[] queue; ^x(s!4d]
I&^hG\D
public int get() { l]
return queue[1]; X*Q<REDB
} `6NcE-oJ
EuVA"~PA
public void remove() { Sq2 8=1%
SortUtil.swap(queue,1,size--); ?d3<GhzlR3
fixDown(1); &u<%%b|
} d,'gh4C
file://fixdown R$eEW"]
private void fixDown(int k) { Q!AGalP z
int j; (v0Q.Q@<
while ((j = k << 1) <= size) { ]-+l.gVFW
if (j < size %26amp;%26amp; queue[j] j++; k0b6X5
if (queue[k]>queue[j]) file://不用交换 /;y`6WG%2
break; NOAz"m+o
SortUtil.swap(queue,j,k); ( YZ2&
k = j; S,Qa\\~z
} -" r4
} GbkDs-
private void fixUp(int k) { 1p-<F3;
while (k > 1) { qckRX+P`
int j = k >> 1; (II#9n)
if (queue[j]>queue[k]) Z;dR:|%)
break; (enOj0
SortUtil.swap(queue,j,k); %bG\
k = j; anKflt3
} Xoq -
} !,J]5$M
9m"EY@-
} urL@SeV+$
Cf v1nUW
} EyV5FWb58
&-vHb
SortUtil： YQ1rS X3
%r(qQM.Pl
package org.rut.util.algorithm; SapVS*yx@
vZqW,GDfXo
import org.rut.util.algorithm.support.BubbleSort; ;jKLB^4nX
import org.rut.util.algorithm.support.HeapSort; fNrpYR X
import org.rut.util.algorithm.support.ImprovedMergeSort; Psf{~ (Ii
import org.rut.util.algorithm.support.ImprovedQuickSort; zCS }i_ p
import org.rut.util.algorithm.support.InsertSort; lm{4x~y$h
import org.rut.util.algorithm.support.MergeSort; VEL!-e^X&
import org.rut.util.algorithm.support.QuickSort; .\ vrBf
import org.rut.util.algorithm.support.SelectionSort; je>mAQKi\
import org.rut.util.algorithm.support.ShellSort; G}]'}FUp
[xdVuL;N
/** +mO/9m
* @author treeroot M@pF[J/
* @since 2006-2-2 "SC]G22
* @version 1.0 7PO]\X^(zE
*/ <c,iu{:
public class SortUtil { 6>'>BamX
public final static int INSERT = 1; UnZc9 6
public final static int BUBBLE = 2; W yP]]I.
public final static int SELECTION = 3; (r1"!~d@
public final static int SHELL = 4; SEM-t
public final static int QUICK = 5; Pn?gB}l
public final static int IMPROVED_QUICK = 6; }JUc!cH8z
public final static int MERGE = 7; ,OkI0[
public final static int IMPROVED_MERGE = 8; ki?V eFp
public final static int HEAP = 9; !|J2o8g
lI9|"^n7F
public static void sort(int[] data) { ZV-Yq !|t
sort(data, IMPROVED_QUICK); ,L\KS^>
} +\.0Pr
private static String[] name={ '^'PdB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?uF3Q)rCk
}; R@IwmJxX
c48I-{?
private static Sort[] impl=new Sort[]{ D3+<16[,
new InsertSort(), +}f}!h;
new BubbleSort(), h;OHpvk
new SelectionSort(), T!1XL7
new ShellSort(), 1CUI6@Cz)
new QuickSort(), >GDf* ox[
new ImprovedQuickSort(), vU#>3[aC
new MergeSort(), E6?0/"
new ImprovedMergeSort(), a{.-qp
new HeapSort() }C JK9*Z
}; 0/~{,
oSO~72
public static String toString(int algorithm){ g(o^'f
return name[algorithm-1]; @[TSJi
} !]8QOn7=
DeQZDY //
public static void sort(int[] data, int algorithm) { J[\8:qE
impl[algorithm-1].sort(data); q9Lq+4\
} &sJ6k/l
>ATccv
public static interface Sort { #Xi9O.
public void sort(int[] data); H00iy$R
} QghL=
H 9?txNea
public static void swap(int[] data, int i, int j) { t+Qx-sW
int temp = data; qt.=
data = data[j]; J(,{ -d-E
data[j] = temp; L~Xzo
} :M@#.
} X09i+/ICK