[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; isK~=
} fNOsB^Y
int i1=l; t b5k|
int i2=mid+1; kW>Q9Nc=V
for(int cur=l;cur<=r;cur++){ z+5l:f
if(i1==mid+1) ~[bS+]d!
data[cur]=temp[i2++]; kBYZNjSz
else if(i2>r) UD6D![e
data[cur]=temp[i1++]; (6i)m c(
else if(temp[i1] data[cur]=temp[i1++]; 1SoKnfz{6
else J+IQvOn_|
data[cur]=temp[i2++]; 46c7f*1l
} BU-+L}-48
} ZzET8?8
EMME?OW$
} txM R[o_
&RQQVki3
改进后的归并排序: %''z~LzJ8
rug^_d=B
package org.rut.util.algorithm.support; dj,7lJy
o, e y.
import org.rut.util.algorithm.SortUtil; 'vKB]/e;
gzDH~'8W
/** e _\]Q-
* @author treeroot &U\Xy+
* @since 2006-2-2 !l!^`c
* @version 1.0 =/wAk0c^y
*/ i1RU5IRy|j
public class ImprovedMergeSort implements SortUtil.Sort { tX)l$oRPr
*oLAO/)n
private static final int THRESHOLD = 10; cn1CM'Ru
_[}r2,e
/* ~#3h-|]*
* (non-Javadoc) UO(B>Abp
* .U|e#t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V {R<R2h1
*/ g _fvbVX
public void sort(int[] data) { Bs2.$~
int[] temp=new int[data.length]; oK1"8k|Z
mergeSort(data,temp,0,data.length-1); QA_SS'*
} v#u]cmI
QF:">G
private void mergeSort(int[] data, int[] temp, int l, int r) { H'68K8i0
int i, j, k; 5HP6o
int mid = (l + r) / 2; ?d`?Ss;v
if (l == r) ZzfGs
return; Rt!G:hy7
if ((mid - l) >= THRESHOLD) -N`j` zb|
mergeSort(data, temp, l, mid); u,<I%
else {6Tw+/`P
insertSort(data, l, mid - l + 1); X51pRP $R
if ((r - mid) > THRESHOLD) 7MIu-x|
mergeSort(data, temp, mid + 1, r); !%b.k6%>w
else Yjxa=CD
insertSort(data, mid + 1, r - mid); Qd"{2>
m[&]#K6
for (i = l; i <= mid; i++) { G4g<PFx
temp = data; K%9PIqK?4
} AnVj '3
for (j = 1; j <= r - mid; j++) { jG=*\lK6
temp[r - j + 1] = data[j + mid]; A[L+w9
} |@pJ]
int a = temp[l]; Gs$<r~Tg
int b = temp[r]; mlCw(i,
for (i = l, j = r, k = l; k <= r; k++) { PZ2$ [s0W
if (a < b) { k]FP1\Y
data[k] = temp[i++]; UKyOkuY:w
a = temp; \.p{~Hv
} else { | ZBv;BW
data[k] = temp[j--]; V#jFjObTN
b = temp[j]; {'dpRq{c|
} |aef$f5
} rqk1 F~j|
} Ro :/J
CpHF3o`Z6
/** H?tonG.^(
* @param data <V)T_
* @param l R?3^Kx
* @param i S N_!o2F2
*/ ^S!^$d*
private void insertSort(int[] data, int start, int len) { 3XY;g{`=q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n,sl|hv2U
} )qs>Z?7
} X~XpX7d!
} Wj2]1A
} Z\8TpwD2
-E~pCN(E
堆排序： ~6!{\un
F-Mf~+=Dn
package org.rut.util.algorithm.support; m}w~ d /
)f]E<*k'E
import org.rut.util.algorithm.SortUtil; i/QE)"B"q
c/.U<
/** vwQY_J8
* @author treeroot prE~GO7Z
* @since 2006-2-2 :3F&NsgHH
* @version 1.0 <;\T e4g[
*/ J =o,: 3"
public class HeapSort implements SortUtil.Sort{ K FV&Dt}<
[ 9)9>-
/* (non-Javadoc) INrl^P*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t(/b'Peq
*/ |T7 < !
public void sort(int[] data) { cy|]}n85
MaxHeap h=new MaxHeap(); Nzj7e 1=
h.init(data); [Lh<k+
for(int i=0;i h.remove(); @dE|UZ=(
System.arraycopy(h.queue,1,data,0,data.length); 9d{iq"*R
} FyYD7E
{>[,i`)
private static class MaxHeap{ :9H=D^J
3~H_UGw
void init(int[] data){ G]5m@;~l5
this.queue=new int[data.length+1]; b['Jr% "O
for(int i=0;i queue[++size]=data; Z4NNrA#
fixUp(size); HV'xDy[)
} $I&DAGV0
} t4)~A5s
vk\a>};
private int size=0; hnha1 f
[)U|HnAJ
private int[] queue; HNN,1MN
hMz= \)Pl
public int get() { V9Bi2\s*
return queue[1]; _?Zg$7VJ
} HJ[@;F|aU
4UD7!
public void remove() { >mRA|0$
SortUtil.swap(queue,1,size--); to~Ap=E
fixDown(1); KP" lz
} a$!|)+
file://fixdown *BzqAi0
private void fixDown(int k) { em`z=JGG
int j; )s^D}I(
while ((j = k << 1) <= size) { EjLj5Z/q
if (j < size %26amp;%26amp; queue[j] j++; zs!,PQF(
if (queue[k]>queue[j]) file://不用交换 .G#wXsJj
break; \{
SortUtil.swap(queue,j,k); ;&4}hPq
k = j; &~oBJar
} d`9%:2qE
} wi/Fx=w
private void fixUp(int k) { ; V)pXLE
while (k > 1) { ]pi"M3f_
int j = k >> 1; n'a=@/
if (queue[j]>queue[k]) JK:i-
break; Lqy]bnY
SortUtil.swap(queue,j,k); $ )q?z.U
k = j; T+p?VngF
} 1,,kU
} t|q@~B :
dH"wYMNL
} ?&?gQ#\N_J
0Q>f,}W%>
} P)x&9OHV
qP? V{N
SortUtil： @{16j#'R
RWM9cV5
package org.rut.util.algorithm; =Tv;?U C
xu9K\/{7
import org.rut.util.algorithm.support.BubbleSort; SYkLia(Ty
import org.rut.util.algorithm.support.HeapSort; 5.!iVyN
import org.rut.util.algorithm.support.ImprovedMergeSort; `7<4]#b^o
import org.rut.util.algorithm.support.ImprovedQuickSort; m'D_zb9+
import org.rut.util.algorithm.support.InsertSort; Y?Ph%i2E
import org.rut.util.algorithm.support.MergeSort; ?HT+| !4p
import org.rut.util.algorithm.support.QuickSort; \xD.rBbt
import org.rut.util.algorithm.support.SelectionSort; %D|p7&
import org.rut.util.algorithm.support.ShellSort; ,r\
O ;,BzA-n
/** :%ms6j/B&V
* @author treeroot Sx{vZS3
* @since 2006-2-2 1fwjW0t
* @version 1.0 ]6)^+(zU
*/ @jb -u S
public class SortUtil { pC<~\RR
public final static int INSERT = 1; 1FC'DH!
public final static int BUBBLE = 2; A/eZnsk
public final static int SELECTION = 3; eZpyDw C{
public final static int SHELL = 4; OxGKtnAjf
public final static int QUICK = 5; F)dJws7-
public final static int IMPROVED_QUICK = 6; ._2#89V
public final static int MERGE = 7; 1&%6sZN
public final static int IMPROVED_MERGE = 8; "b)Y5[nW
public final static int HEAP = 9; tKtKW5n~
F*""n
public static void sort(int[] data) { wyF'B
sort(data, IMPROVED_QUICK); /'KCW_Q
} nT.i|(xd.
private static String[] name={ i\E}!Rwl+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z7B>7}i-
}; '%U'%')
WE;QEA/
private static Sort[] impl=new Sort[]{ 5[<"_
new InsertSort(), #O3Y#2lI
new BubbleSort(), 9eOP:/'}w
new SelectionSort(), .W4P/Pw'
new ShellSort(), -|s w\Q
new QuickSort(), N.r8dC
new ImprovedQuickSort(), f.Wip)g
new MergeSort(), (bpO>4(S
new ImprovedMergeSort(), HLMcOuj
new HeapSort() 5P=3.Mk
}; OU2.d7
Wp7lDx
public static String toString(int algorithm){ &sh5|5EC
return name[algorithm-1]; M*XAyo4fI
} -J7BEx
e5\/:HpI
public static void sort(int[] data, int algorithm) { kn2s,%\`<p
impl[algorithm-1].sort(data); [6+iR
} +XL^dzN[|$
p5RnFe l
public static interface Sort { *4]u?R
public void sort(int[] data); z$#q'+$
} 5q<cZ)v#&
NXwthc3
public static void swap(int[] data, int i, int j) { \YXzq<7
int temp = data; tOUpK20q.@
data = data[j]; i_/A,5TF
data[j] = temp; +qN}oyL
} j1[Ng #.
} T22 4L.?