[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; X *"i6*
} zE9W8:7
int i1=l; &.Qrs:U
int i2=mid+1; u?(d gJ
for(int cur=l;cur<=r;cur++){ qiD@'Va\
if(i1==mid+1) k2tF}
data[cur]=temp[i2++]; P* BmHz4KL
else if(i2>r) )lqAD+9Q
data[cur]=temp[i1++]; k)=s>&hl
else if(temp[i1] data[cur]=temp[i1++]; 3ym',q
else 9-a0:bP
data[cur]=temp[i2++]; +.FEq*V
} E]n&=\
} H3=qe I
s)D;a-F
} +_oJ}KI
u^I|T.w<r6
改进后的归并排序: j-}O0~Jz
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package org.rut.util.algorithm.support; 08\,<9
eJX9_6m-
import org.rut.util.algorithm.SortUtil; fxHH;hRfv
0 ZKx<]!
/** $Sip$\+*
* @author treeroot LCKV>3+_#
* @since 2006-2-2 i3mcx)d@H
* @version 1.0 SRDp*
*/ 8dIgjQX|
public class ImprovedMergeSort implements SortUtil.Sort { )}Kf=
Js?]$V"
private static final int THRESHOLD = 10; vr6w^&[c^
A]oV"`f
/* "JV_2K_i
* (non-Javadoc) hD!7Cl Q
* uZKr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V6X 0^g
*/ rw JIx|(
public void sort(int[] data) { s*]}QmRpr
int[] temp=new int[data.length]; KRRdXx\~
mergeSort(data,temp,0,data.length-1); qqY"*uJ'
} ItrDJ'
2uW; xfeY
private void mergeSort(int[] data, int[] temp, int l, int r) { 0IBSRFt$g&
int i, j, k; (iX+{a%"
int mid = (l + r) / 2; aeM+ d`f
if (l == r) Om2d.7S
return; ?GR"FmB(
if ((mid - l) >= THRESHOLD) ZKTz ,
mergeSort(data, temp, l, mid); ;h
else ;dgp+
insertSort(data, l, mid - l + 1); 0GCEqQy8
if ((r - mid) > THRESHOLD) -C]5>& W
mergeSort(data, temp, mid + 1, r); >KhOz[Zg
else :':s@gqr
insertSort(data, mid + 1, r - mid); 9qzHS~l
0 /U{p,r6`
for (i = l; i <= mid; i++) { p}~JgEE
temp = data; 6O!2P
} i<Zc"v;
for (j = 1; j <= r - mid; j++) { VjZ|$k
temp[r - j + 1] = data[j + mid]; `b7t4d*
} S_UIO.K
int a = temp[l]; JL{VD /f
int b = temp[r]; A$0fKko
for (i = l, j = r, k = l; k <= r; k++) { Pu$Tk|
if (a < b) { ]Q)OL
data[k] = temp[i++]; RMu~l@
a = temp; <R=Zs[9M1
} else { >_T-u<E
data[k] = temp[j--]; s9DYi~/,
b = temp[j]; h J)h\
} y _k l:Ssa
} #c.K/&Gc7j
} E{P|)`,V
g(CI;f}y
/** Txb#C[`
* @param data 9EibIOD^/
* @param l I:1C8*/
* @param i `7V]y-
*/ 56kI 5:
private void insertSort(int[] data, int start, int len) { [5Mr@f4I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~U&AI1t+J
} [?N~s:}
} Cjlk
} ar+9\
} S9FE
.Rs^YZF
堆排序： H8}oIA"b
@Qt{jI!
package org.rut.util.algorithm.support; $}<e|3_
Si;H0uPO
import org.rut.util.algorithm.SortUtil; MeZf*' J
i5@z< \
/** u>a5GkG.
* @author treeroot <$Yd0hxjU
* @since 2006-2-2 Ry6@VQ"NLb
* @version 1.0 ^9:Z7 >Z
*/ 59;KQ
public class HeapSort implements SortUtil.Sort{ 2.%ITB
&7tbI5na@
/* (non-Javadoc) PtiOz :zV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >7DhTM-A
*/ %YqEzlzF
public void sort(int[] data) { p947w,1![
MaxHeap h=new MaxHeap(); N6i Q8P-
h.init(data); R%[ c;i
for(int i=0;i h.remove(); ,/|T-Ka
System.arraycopy(h.queue,1,data,0,data.length); m#\dSl}
} {V CWn95Z
)irEM
private static class MaxHeap{ 'YSHi\z ](
z9Rp`z&`E
void init(int[] data){ 3eQ&F~S
this.queue=new int[data.length+1]; YNsJZnGr8#
for(int i=0;i queue[++size]=data; $kp{Eg '
fixUp(size); LyFN.2qw
} kc`Tdn
} 1tFNM[R
HY:7? <r
private int size=0; tf`^v6m%]
ds[|
private int[] queue; d5:c^`
j*r{2f4Rt
public int get() { !'*-$e
return queue[1]; c(s.5p ^
} xdkZdx>N
J<jy2@"tXo
public void remove() { M[,@{u/
SortUtil.swap(queue,1,size--); g{&ui.ml&
fixDown(1); ^.QzQ1=D
} k~1?VQ+?M
file://fixdown #!+:!_45
private void fixDown(int k) { draN0vf
int j; wNdisI
while ((j = k << 1) <= size) { V)N%WXG
if (j < size %26amp;%26amp; queue[j] j++; kc&U'&RgY
if (queue[k]>queue[j]) file://不用交换 \(2sW^fY
break; sD#.Oq4&]y
SortUtil.swap(queue,j,k); Qd3 j%(
k = j; 1=Z0w +v{
} 5VU2[ \
} Y`a3tO=Pd
private void fixUp(int k) { {F.[&/A
while (k > 1) { nZYBE030
int j = k >> 1; /f;~X"!
if (queue[j]>queue[k]) t;\Y{`
break; XU(eEnmom
SortUtil.swap(queue,j,k); Q>i^s@0
k = j; ['iPl/v0
} Q hO!Ma]
} JT_ `.(
:eVq#3}
} A6(/;+n
,Ko!$29[
} H"WprHe
hkQ"OsU
SortUtil： XlR@pr6tw
o!A+&{
package org.rut.util.algorithm; 0flRh)[J
[ v*ju!
import org.rut.util.algorithm.support.BubbleSort; 1yu4emye4
import org.rut.util.algorithm.support.HeapSort; [`7ThHX
import org.rut.util.algorithm.support.ImprovedMergeSort; 20Wg=p9L
import org.rut.util.algorithm.support.ImprovedQuickSort; cyz3,3\e
import org.rut.util.algorithm.support.InsertSort; 1p=]hC
import org.rut.util.algorithm.support.MergeSort; qY!Zt_Be6
import org.rut.util.algorithm.support.QuickSort; HN|%9{VeB
import org.rut.util.algorithm.support.SelectionSort; & >fQp(f
import org.rut.util.algorithm.support.ShellSort; _.8S&
#AQV(;r7@
/** 8bld3p"^
* @author treeroot ~b8]H|<'Y
* @since 2006-2-2 P/_['7
* @version 1.0 j&qub_j"xX
*/ }*]-jWt1J\
public class SortUtil { gRcQt:
public final static int INSERT = 1; g`QEu 5v
public final static int BUBBLE = 2; KPUV@eQ,
public final static int SELECTION = 3; {bY%# m
public final static int SHELL = 4; h@ryy\9
public final static int QUICK = 5; EXqE~afm2
public final static int IMPROVED_QUICK = 6; }0Ed]
public final static int MERGE = 7; CzrC%xy
public final static int IMPROVED_MERGE = 8; l,5+@i`5i
public final static int HEAP = 9; },-H"Qs
Pe3o;mx
public static void sort(int[] data) { X=&KayD
sort(data, IMPROVED_QUICK); hp|YE'uYT
} I%KYtv~`
private static String[] name={ e+fN6v5pU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NK H@+,+V
}; C$`tbq
CRy|kkT
private static Sort[] impl=new Sort[]{ $ $mV d+
new InsertSort(), QoT;WM Z
new BubbleSort(), uoh7Sz5!^
new SelectionSort(), ]:J$w]\
new ShellSort(), }Jj}%XxKs
new QuickSort(), nAlQ7'
new ImprovedQuickSort(), K[zVa
new MergeSort(), bV3|6]k^
new ImprovedMergeSort(), Pa:|_IXA
new HeapSort() rjnrju+
}; e$Pj.>-<=
mQ"-,mMI
public static String toString(int algorithm){ pOoEI+t
return name[algorithm-1]; DZtsy!xA
} [ub e6
KF:78C
public static void sort(int[] data, int algorithm) { \:LW(&[!
impl[algorithm-1].sort(data); inp7K41
} s6`?LZ0(z
/od@!/
public static interface Sort { X%x*f3[
public void sort(int[] data); dioGAai'
} (KZ{^X?a
a/xn'"eli
public static void swap(int[] data, int i, int j) { 19%imf
int temp = data; \1M4Dl5!
data = data[j]; _;\_l
data[j] = temp; M/`lM$98:
} }W^A*]X
} ('+d.F[109