[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; o3=pxU*
} fm1yZX?`
int i1=l; H[D<G9:
int i2=mid+1; $u P'>
for(int cur=l;cur<=r;cur++){ aGq1YOD[$
if(i1==mid+1) \x;`8H
data[cur]=temp[i2++]; LeaJ).Maw
else if(i2>r) {Bw
data[cur]=temp[i1++]; L(+I
else if(temp[i1] data[cur]=temp[i1++]; G[$g-NU+
else Dbl+izF3
data[cur]=temp[i2++]; 7oV$TAAf
} t4v@d
} F_F02:t
]+A%37
} Cd2A&RB
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改进后的归并排序: zv0bE?W9
a]nK!;>$
package org.rut.util.algorithm.support; W.CbNou
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import org.rut.util.algorithm.SortUtil; F<TIZ^gFP
*WaqNMD[%
/** ACOn}yH
* @author treeroot <NWq03:&
* @since 2006-2-2 e2qSU[
* @version 1.0 QTC!vKM
*/ oju,2kpH7#
public class ImprovedMergeSort implements SortUtil.Sort { L Q0e@5
<.".,Na(J0
private static final int THRESHOLD = 10; JIPBJ
.tcdqL-'
/* !|Wf mU
* (non-Javadoc) -nXlW
* F:N8{puq5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IGNU_w4j
*/ U0Uy C
public void sort(int[] data) { 6=:s3I^
int[] temp=new int[data.length]; -}3nIk<N
mergeSort(data,temp,0,data.length-1); F3[,6%4v
} Wh)!Ha}
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private void mergeSort(int[] data, int[] temp, int l, int r) { Ej8g/{
int i, j, k; )2a)$qx;
int mid = (l + r) / 2; ALj~e#{;z
if (l == r) &~=r .T
return; #%EHcgF
if ((mid - l) >= THRESHOLD) m?kyAW'|
mergeSort(data, temp, l, mid); 7=%Oev&0g-
else Gk]ZP31u
insertSort(data, l, mid - l + 1); F1A40h7R$Y
if ((r - mid) > THRESHOLD) l dqU#{
mergeSort(data, temp, mid + 1, r); }R11G9N.
else U*b7 Pxq;
insertSort(data, mid + 1, r - mid); stUUez>
\W]gy_=D{
for (i = l; i <= mid; i++) { L7hRFf-o
temp = data; n*Uk<_WA
} 9:P]{}
for (j = 1; j <= r - mid; j++) { j+@3.^vK
temp[r - j + 1] = data[j + mid]; . P+Qu
} ]IEZ?+F,
int a = temp[l]; LT"H-fTgs
int b = temp[r]; 9z..LD(
for (i = l, j = r, k = l; k <= r; k++) { ()48>||
if (a < b) { 2?SbkU/3|P
data[k] = temp[i++]; zCuB+r=C
a = temp; 4Y$\QZO
} else { 7f4O~4.[i
data[k] = temp[j--]; 0Ni{UV? k
b = temp[j]; rlD!%gG2x
} UKQ"sC
} 2 rr=FJ
} xP!QV~$>
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/** x-e6[_F
* @param data ddyX+.LMk
* @param l -sfv"?
* @param i <l$ d>,
*/ vj]>X4'i
private void insertSort(int[] data, int start, int len) { )9:5?,SO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8lL|j
} )+hV+rM jp
} +l/v`=C
} i5t6$|u:&m
} Ff%V1BH[
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堆排序： ##*]2Dy
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package org.rut.util.algorithm.support; M{Z ;7n'
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import org.rut.util.algorithm.SortUtil; p.SipQ.P
6eB;
/** s:Ml\['x
* @author treeroot J+J,W5t^
* @since 2006-2-2 P}Kgh7)3
* @version 1.0 [YfoQ1
*/ wDZ<UP=X
public class HeapSort implements SortUtil.Sort{ sa(.Anmlj
r8Mx+r
/* (non-Javadoc) =O![>Fu5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K"H\gmV_g
*/ by X!,
public void sort(int[] data) { {P]C>
MaxHeap h=new MaxHeap(); V@G#U[D
h.init(data); zKO7`.*
for(int i=0;i h.remove(); d(T4Kd$r
System.arraycopy(h.queue,1,data,0,data.length); .$qa?$@
} M"~jNe|
*@2Bh4
private static class MaxHeap{ SB_Tzp
9DxHdpOk
void init(int[] data){ m1"m KM
this.queue=new int[data.length+1]; uJ!&T
for(int i=0;i queue[++size]=data; ,XD" p1(|G
fixUp(size); Kc MzY
} nw+~:c
} )`\hK
BG>Y[u\N
private int size=0; b_0THy.Z
X'Ss#s>g
private int[] queue; b\k]Jx
')X(P>
public int get() { L:R4&|E/t
return queue[1]; jjs/6sSRk
} n ~t{]if"
:RaQ =C
public void remove() { K$CC ~,D
SortUtil.swap(queue,1,size--); 7aG.?Ca%
fixDown(1); sZ.<:mu[
} Z*,e<zNQ
file://fixdown ^|Ap_!t$;
private void fixDown(int k) { S*h52li
int j; mxa~JAlN_
while ((j = k << 1) <= size) { 7+O)AU{
if (j < size %26amp;%26amp; queue[j] j++; 8Sbz)X
if (queue[k]>queue[j]) file://不用交换 6#=jF[
break; %()d$.F
SortUtil.swap(queue,j,k); B=_w9iVN
k = j; Y0LZbT3
} !FEc:qH
} =C"[o\]VV
private void fixUp(int k) { vgfC{]v<W]
while (k > 1) { ^QK`z@B
int j = k >> 1; :6n#y-9^1
if (queue[j]>queue[k]) L^J4wYFTO
break; b!<_ JOL2.
SortUtil.swap(queue,j,k); qBA)5Sv\V
k = j; _&gi4)q
} |/Nh#
} -Q WvB
l|CM/(99-
} {)YbksrJ{
Kv_2=]H
} N*Y[[N(
pUIN`ya[[
SortUtil： 5ggyk0
aZ#FKp^8H
package org.rut.util.algorithm; dwOfEYC
1d^~KBfv
import org.rut.util.algorithm.support.BubbleSort; ah>c)1DA*H
import org.rut.util.algorithm.support.HeapSort; #bOv}1,s
import org.rut.util.algorithm.support.ImprovedMergeSort; b<h((]Q>^
import org.rut.util.algorithm.support.ImprovedQuickSort; 0'^M}&zCi
import org.rut.util.algorithm.support.InsertSort; FP@_V-
import org.rut.util.algorithm.support.MergeSort; 73Dxf -
import org.rut.util.algorithm.support.QuickSort; {K^5q{u
import org.rut.util.algorithm.support.SelectionSort; eG=d)`.JaV
import org.rut.util.algorithm.support.ShellSort; _3/u#'m0
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/** corm'AJ/
* @author treeroot m&)/>'W
* @since 2006-2-2 .K C* (}-
* @version 1.0 Gp9 <LB\,
*/ aDS:82GMQ
public class SortUtil { ; 476t
public final static int INSERT = 1; 7nt(Rtbsu
public final static int BUBBLE = 2; `?VK(<w0q
public final static int SELECTION = 3; .k#PrT1C
public final static int SHELL = 4; FZ*"^=)`G
public final static int QUICK = 5; >d 5-if
public final static int IMPROVED_QUICK = 6; }8'_M/u\
public final static int MERGE = 7; snbXAx1L
public final static int IMPROVED_MERGE = 8; GSA+A7sZ
public final static int HEAP = 9; b8!oZ~K
h#1:ypA6l
public static void sort(int[] data) { :Drf]D(sMX
sort(data, IMPROVED_QUICK); ,xwiJfG; ]
} FSuC)Xg
private static String[] name={ =!Ik5LiD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |W@ ~mrO
}; (Mv~0ShakO
It*U"4lgi
private static Sort[] impl=new Sort[]{ P@y)K!{Nk
new InsertSort(), 1^_W[+<S/
new BubbleSort(), r^k+D<k[7
new SelectionSort(), "rdpA[>L
new ShellSort(), rtPo)#t
new QuickSort(), 73qE!(
new ImprovedQuickSort(), /&6{}n
new MergeSort(), /#9P0@Y
new ImprovedMergeSort(), |AvPg
new HeapSort() nJ2B*(S'v.
}; uQG|r)
S @[]znH
public static String toString(int algorithm){ II'.vp
return name[algorithm-1]; Mg >%EH/'
} &D<6Go/)_*
VjM/'V5
public static void sort(int[] data, int algorithm) { HOi~eX1d
impl[algorithm-1].sort(data); x@X2r
} kB+$Kt<]L
o0WwlmB5
public static interface Sort { ybpOk
public void sort(int[] data); )[eTZg
} z/#,L!Z3
Le83[E*i
public static void swap(int[] data, int i, int j) { 0 Rb3|te
int temp = data; dPO"8HQ
data = data[j]; CLND[gc
data[j] = temp; 0Hrvr
} gpq ,rOIK
} "9s}1C;Me