[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; (W@ ypK@
} =WDf [?ED
int i1=l; \dufKeiS&a
int i2=mid+1; 8|7Tk[X1j
for(int cur=l;cur<=r;cur++){ 6{+~B2Ef
if(i1==mid+1) O5k's
data[cur]=temp[i2++]; ;?n*w+6<
else if(i2>r) !lu$WJ{M
data[cur]=temp[i1++]; Z|wZyt$$
else if(temp[i1] data[cur]=temp[i1++]; *+@/:$|U
else WWE?U-o
data[cur]=temp[i2++]; vO4 &ZQ>6
} 3_Oq4/
} n]8_]0{qi
3)dT+lZ
} Aoa0czC~
deu+ i
改进后的归并排序: =4Ex' %%(U
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package org.rut.util.algorithm.support; Y`(I};MO
dHOz;4_
import org.rut.util.algorithm.SortUtil; Ii[rM/sG
e,1Jxz4QH
/** GSpS8wWD }
* @author treeroot Kh% x
* @since 2006-2-2 bk^ :6>{K
* @version 1.0 ]]`+aF0
*/ D 3Int0n
public class ImprovedMergeSort implements SortUtil.Sort { qRB%G<H
aG=Y 6j G
private static final int THRESHOLD = 10; iZ_R oJ
V?Nl%M[b
/* 4&t6
* (non-Javadoc) QMfYM~o
* QAb[M\G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {nHy!{+qqG
*/ );Gt!]p`;
public void sort(int[] data) { }^LcKV
int[] temp=new int[data.length]; WtlIrdc
mergeSort(data,temp,0,data.length-1); C<n.C*o
} Ho"FB|e
5~.\rcr%
private void mergeSort(int[] data, int[] temp, int l, int r) { |AWu0h\keO
int i, j, k; 4Nq n47|>e
int mid = (l + r) / 2; Wa[~)A
if (l == r) K"=v|a.
return; d[SC1J
if ((mid - l) >= THRESHOLD) 8Q6il-
mergeSort(data, temp, l, mid); S2fw"1h*x
else )Ba^Igb}
insertSort(data, l, mid - l + 1); /!%P7F
if ((r - mid) > THRESHOLD) 8n&",)U
mergeSort(data, temp, mid + 1, r); EkTen:{G
else vDBnWA
insertSort(data, mid + 1, r - mid); ~*2PmD"+:
}.T$bj1B;V
for (i = l; i <= mid; i++) { ,;D74h2F
temp = data; Rj E,Wn
} =#+Z KD
for (j = 1; j <= r - mid; j++) { 1eb1Lvn
temp[r - j + 1] = data[j + mid]; =,0E3:X^
} q_oYI3
int a = temp[l]; Ap97Zcw
int b = temp[r]; |fzo$Bq
for (i = l, j = r, k = l; k <= r; k++) { m?M(79u[
if (a < b) { |]m&LC
data[k] = temp[i++]; (bBetX
a = temp; Y<0f1N
} else { 9r8{9h:
data[k] = temp[j--]; ec]ksw6T+
b = temp[j]; -z|idy{
} H=yD}!j
} G&Cl:CtC
} C]r$
j?&FK
/** oW/&X5
* @param data xH'H! 8
* @param l +Oyt
* @param i Qy3e,9nS
*/ 4Y)3<=kDG
private void insertSort(int[] data, int start, int len) { k| jCc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :+R||qi
} :*oI"U*f
} ,cm2uY
} W)9KYI9u
} OI`Lb\8pP
@9c^{x\4
堆排序： PGw"\-F
]1Q\wsB
package org.rut.util.algorithm.support; }_gq vgI>p
Hh qx)u
import org.rut.util.algorithm.SortUtil; + S%+Ku
+h9CcBd
/** Ak9W8Z}
* @author treeroot 4ErDGYg}
* @since 2006-2-2 )FHaJ*&d
* @version 1.0 _6(zG.Fg
*/ {+r?gJ
public class HeapSort implements SortUtil.Sort{ \|T0@V
D(r|sw
/* (non-Javadoc) Ot,sMRk'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) riBT5
*/ Y.hrU*[J0
public void sort(int[] data) { +"p",Z
MaxHeap h=new MaxHeap(); ]XP[tLYY
h.init(data); L4[bm[x
for(int i=0;i h.remove(); {{ wVM:1
System.arraycopy(h.queue,1,data,0,data.length); MK"Yt<e(o
} Y{J/Oib
"1[N;|xa
private static class MaxHeap{ <4!w2vxG
@FbzKHdV/
void init(int[] data){ ]T*{M
this.queue=new int[data.length+1]; \ _i`=dx
for(int i=0;i queue[++size]=data; [S<DdTY9hZ
fixUp(size); i;\i4MT
} Z,d/FC#y(
} @*c+`5)_
Lv_6Mf(
private int size=0; 8XY4
Q% dpGI
private int[] queue; (Bmjz*%M
)v|a:'%K_
public int get() { Ne#nSx5,
return queue[1]; S>*T&K
} nxH$$}9
r^ "mPgY
public void remove() { DvhK0L*Qr
SortUtil.swap(queue,1,size--); P!vBS"S
fixDown(1); kKjYMYT6
} 3Ys|M%N
file://fixdown f5yd2wKy6
private void fixDown(int k) { FF/MTd}6qG
int j; 6?KsH;L9
while ((j = k << 1) <= size) { {2q
if (j < size %26amp;%26amp; queue[j] j++; *PMql$
if (queue[k]>queue[j]) file://不用交换 `b] NB^/
break; oF*Y$OEu?c
SortUtil.swap(queue,j,k); fqr}tvMr=T
k = j; cw^FOV*
} 0<s)xaN>Y
} [t6)M~&e:_
private void fixUp(int k) { v:vA=R2
while (k > 1) { :}GxJT4
int j = k >> 1; f9&D1Gh+w
if (queue[j]>queue[k]) ^Krkf4fO
break; pa\]@;P1
SortUtil.swap(queue,j,k); prm
k = j; ^L'K?o
} -jyD!(
} Nh+$'6yT%
b;}MA7=
} t7~mW$}O
nY*ODL
} m?m,w$K
qQom=x
SortUtil： PuOo^pFhH
#h&?wE>
package org.rut.util.algorithm; S9L3/P]
d+IPa<N
import org.rut.util.algorithm.support.BubbleSort; l s_i)X
import org.rut.util.algorithm.support.HeapSort; od|pI5St
import org.rut.util.algorithm.support.ImprovedMergeSort; 5fLCmLM`
import org.rut.util.algorithm.support.ImprovedQuickSort; fe Q%L
import org.rut.util.algorithm.support.InsertSort; cKxJeM07
import org.rut.util.algorithm.support.MergeSort; JZc5U}i
import org.rut.util.algorithm.support.QuickSort; M.128J+xfS
import org.rut.util.algorithm.support.SelectionSort; -S|L+">=Z
import org.rut.util.algorithm.support.ShellSort; ,{oANqP
`#(4K4]1.
/** l,/5$JGnk
* @author treeroot $@U`zy"Y
* @since 2006-2-2 tl4;2m3w
* @version 1.0 SMhT>dB
*/ nBD7
public class SortUtil { 2?"9NQvz
public final static int INSERT = 1; G?"1 z;
public final static int BUBBLE = 2; h?R-t*G?
public final static int SELECTION = 3; 6iTDk
public final static int SHELL = 4; iA< EJ
public final static int QUICK = 5; eR}d"F4W
public final static int IMPROVED_QUICK = 6; RM`8P5i]sF
public final static int MERGE = 7; 62zlO{ >rJ
public final static int IMPROVED_MERGE = 8; kO5KZ;+N-
public final static int HEAP = 9; wJgM.V"yb
%|u"0/
public static void sort(int[] data) { r!zNcN(%cs
sort(data, IMPROVED_QUICK); .58AXg
} # I<G:)
private static String[] name={ 0}b8S48|?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a{8GT2h`4
}; wj?fr?
oFsMQ Py
private static Sort[] impl=new Sort[]{ OI-%Ig%C#l
new InsertSort(), ,wFLOfV@
new BubbleSort(), 'shOSB
new SelectionSort(), ?Cu$qE!h)[
new ShellSort(), vw!i)JO8M
new QuickSort(), SZ0Zi\W
new ImprovedQuickSort(), 5I<?HsK@
new MergeSort(), F>}).qx
new ImprovedMergeSort(), tz)L`g/J~
new HeapSort() "2;UXX-H
}; J:Qp(s-N^:
S1=c_!q%9
public static String toString(int algorithm){ r|P4|_No
return name[algorithm-1]; dxU[>m;
} l p? h~
I,#U _
public static void sort(int[] data, int algorithm) { \"lzmxe0p
impl[algorithm-1].sort(data); `n_ Z
} Y6CadC
i&l$G55F
public static interface Sort { ZNx{7]=a
public void sort(int[] data); Na`qAj}
} R<wb8iir
0 @,@
public static void swap(int[] data, int i, int j) { &,#VhT![
int temp = data; cAL&>T
data = data[j]; m\VJ=
data[j] = temp; w S;(u[W
} adxJA}K}
} bEy%S"\<