[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; 053W2Si
} l1W5pmhK]'
int i1=l; m_Fw;s/9
int i2=mid+1; dEe/\i'r9
for(int cur=l;cur<=r;cur++){ eIqj7UY_
if(i1==mid+1) DD3J2J
data[cur]=temp[i2++]; w@%W{aUC
else if(i2>r) ;:$Na=
data[cur]=temp[i1++]; @Qc['V)
else if(temp[i1] data[cur]=temp[i1++]; qo. 6T
else #sqDZ]\B
data[cur]=temp[i2++]; H8-,gV
} %] #; ~I%
} Yaa M-o
q75F^AvH
} 09%eaoW
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改进后的归并排序: hU=J^Gi0
Z(}x7jzW
package org.rut.util.algorithm.support; x(=kh%\;
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import org.rut.util.algorithm.SortUtil; fnmZJJ,Q
LiB0]+wzj
/** m1[QD26
* @author treeroot T:!sfhrZ~<
* @since 2006-2-2 ,<vrDHR
* @version 1.0 "]NQTUb;
*/ 40c#zCE
public class ImprovedMergeSort implements SortUtil.Sort { xd .I5
zA"D0fr
private static final int THRESHOLD = 10; QOF;j#H^
M3t_!HP}!
/* f`IgfJN
* (non-Javadoc) "rKIXy
* !<YRocQY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) quKD\hL$
*/ uRL3v01?H0
public void sort(int[] data) { AV2q*
int[] temp=new int[data.length]; 5r+0^UAO:J
mergeSort(data,temp,0,data.length-1); %DV@2rC<
} S|>Up%{n[
{X =\
private void mergeSort(int[] data, int[] temp, int l, int r) { l.34h
int i, j, k; _$bx4a
int mid = (l + r) / 2; Z?X$8o^Z
if (l == r) )>Lsj1qk
return; {!/y@/NK2
if ((mid - l) >= THRESHOLD) V.-?aXQ*
mergeSort(data, temp, l, mid); <m6Xh^Ko;
else ~<Lf@yu-{
insertSort(data, l, mid - l + 1); ?\O+#U%W
if ((r - mid) > THRESHOLD) y\S7oD(OR
mergeSort(data, temp, mid + 1, r); 5~44R@`
else v =?V{"wk!
insertSort(data, mid + 1, r - mid); FI/YJ@21
zhCI+u4/qz
for (i = l; i <= mid; i++) { )-QNWN H
temp = data; 18n84RkI9
} `Eu(r]:W
for (j = 1; j <= r - mid; j++) { Gz6GU.IyQy
temp[r - j + 1] = data[j + mid]; {//F>5~[
} kK1qFe?]
int a = temp[l]; {&<}*4D
int b = temp[r]; k0YsAa#6V
for (i = l, j = r, k = l; k <= r; k++) { 1tr>D:c\
if (a < b) { )R +o8C
data[k] = temp[i++]; sTA/2d
a = temp; =3zn Ta }
} else { u:S@'z>
data[k] = temp[j--]; XOeh![eMX
b = temp[j]; hv"toszj\
} 6>L.)V
} tZ@+18
} z1FbW&V
Qr<%rU^{.
/** I|j tpv}
* @param data R^2Uh$kk{A
* @param l )>Q 2G/@
* @param i dq8 /^1P
*/ p;7 4+q
private void insertSort(int[] data, int start, int len) { kR6 t .
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v\Wm[Ld
} y[zA[H:
} &53#`WgJ
} V-cuG.
} #pe{:f?
mWusRgj+8
堆排序： OhW=F2OIV
8@fDn(]w
package org.rut.util.algorithm.support; O9|'8"AF
epR~Rlw>2
import org.rut.util.algorithm.SortUtil; @1@q6@9Tu
0`P]fL+&
/** 7XDV=PQ[
* @author treeroot Gtg)%`
* @since 2006-2-2 KyyG8;G%
* @version 1.0 ,Mhe:^3
*/ gZjOlp
public class HeapSort implements SortUtil.Sort{ ob] lCX)
g&"(- :
/* (non-Javadoc) |x6mkSf]ke
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]v{fFmL
*/ NVjJ/
public void sort(int[] data) { }m9LyT=~$
MaxHeap h=new MaxHeap(); ;/V@N |$n
h.init(data); N-rmk
for(int i=0;i h.remove(); Z0=m:h
System.arraycopy(h.queue,1,data,0,data.length); L, {rMLM%
} Y/S3)o
2*citB{
private static class MaxHeap{ X?6h>%) k
VU/W~gb4"A
void init(int[] data){ IPO[J^#Me
this.queue=new int[data.length+1]; O8r"M8
for(int i=0;i queue[++size]=data; ^)q2\YE;
fixUp(size); (J*w./
} UPKi/)C;
} 7rSUSra
(oXN>^-D
private int size=0; lk +K+Ra/
DVhTb
private int[] queue; 1qC:3 ;P
%]ayW$4
public int get() { R1.sq(z`
return queue[1]; &#@>(u:.
} i$ L]X[
eUkoVr
public void remove() { j/9QV
SortUtil.swap(queue,1,size--); KupMndK
fixDown(1); CjQ"oQw
} 5FSv"=
file://fixdown , Ln
private void fixDown(int k) { Tq84Fn!HJ>
int j; T'M66kg
while ((j = k << 1) <= size) { Q==v!"Gi|
if (j < size %26amp;%26amp; queue[j] j++; jAK{<7v4U
if (queue[k]>queue[j]) file://不用交换 #tZf>zrs
break; A'(7VJ
SortUtil.swap(queue,j,k); u7"VeTz
k = j; Tj=dL
} _GO+fB/Q1
} u`pROd/ R5
private void fixUp(int k) { 8A:^K:Q
while (k > 1) { e5ru:#P.p
int j = k >> 1; *>'2$me=
if (queue[j]>queue[k]) cHL]y0>
break; sJb)HQ,7x
SortUtil.swap(queue,j,k); DAnb.0
k = j; [tqO}D
} jRG\C=&(x
} kz0=GKic
2Nn1-wdhb
} 9>Uq$B
.H^P2tp
} ch>Vv"G>
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SortUtil： yIIETE
oM<!I0"gC+
package org.rut.util.algorithm; A*;?U2
cVay=5].
import org.rut.util.algorithm.support.BubbleSort; -@L's{J{M
import org.rut.util.algorithm.support.HeapSort; ?Hi}nsw
import org.rut.util.algorithm.support.ImprovedMergeSort; sc8DY!|OYN
import org.rut.util.algorithm.support.ImprovedQuickSort; CofH}-
import org.rut.util.algorithm.support.InsertSort; ns#~}2"d
import org.rut.util.algorithm.support.MergeSort; _Dj<Eu_
import org.rut.util.algorithm.support.QuickSort; 23-t$y]
import org.rut.util.algorithm.support.SelectionSort; &G/|lv>j
import org.rut.util.algorithm.support.ShellSort; u<]mv
XocsSs
/** f>r3$WKj
* @author treeroot rer|k<k;]G
* @since 2006-2-2 voV:H[RD9
* @version 1.0 \V^*44+ <!
*/ jJVT_8J
public class SortUtil { &$c5~9p\B
public final static int INSERT = 1; 7':f_]
public final static int BUBBLE = 2; h}|6VJ@.
public final static int SELECTION = 3; |qlS6Aln
public final static int SHELL = 4; 8lOI\-
public final static int QUICK = 5; w,Z"W;|
public final static int IMPROVED_QUICK = 6; 6<Z*Tvk{C
public final static int MERGE = 7; PXosFz~
public final static int IMPROVED_MERGE = 8; S= -M3fP~
public final static int HEAP = 9; V5a?=vK9
sS2_-X[_
public static void sort(int[] data) { vUYJf99B
sort(data, IMPROVED_QUICK); SFn 3$ rh
} 8?7kIin
private static String[] name={ 3Q"F(uE v^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .G}k/`a
}; w<65S
PW%1xHLfk
private static Sort[] impl=new Sort[]{ b,sGq
new InsertSort(), WRD A `
new BubbleSort(), 2@ 9pr
new SelectionSort(), W|dpFh`
new ShellSort(), fw' r.
new QuickSort(), MBB5wj
new ImprovedQuickSort(), r219M)D?
new MergeSort(), s>|Z7[*
new ImprovedMergeSort(), 0e+W/Tq
new HeapSort() >5;N64]!)
}; Y{Da+
sEce{"VC
public static String toString(int algorithm){ z2w;oM$g
return name[algorithm-1]; 'y9*uT~
} \sK:W|yy
5vTv$2@
public static void sort(int[] data, int algorithm) { U:]MgZWn
impl[algorithm-1].sort(data); AkrTfi4hC
} ZXsYn
QsF4Dl
public static interface Sort { p9-0?(]
public void sort(int[] data); M8';%=@
} G#H9g PY
bD35JG^&i
public static void swap(int[] data, int i, int j) { RF_[?O)Q
int temp = data; X JY5@I.
data = data[j]; ^qxdmMp)l
data[j] = temp; A&?}w_|9
} x;]x_fz
} Ge~q3"