[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; 9tWu>keu
} iq=<LOx
int i1=l; L3,p8-d9Z
int i2=mid+1; Beqzw0
for(int cur=l;cur<=r;cur++){ Z_Hc":4i
if(i1==mid+1) YrFB~z.V
data[cur]=temp[i2++]; F:1w%#6av
else if(i2>r) Js ~_8
data[cur]=temp[i1++]; qf7lQovK
else if(temp[i1] data[cur]=temp[i1++]; wm!Y5
else BH0].-)[y!
data[cur]=temp[i2++]; YR^J7b\
} ma,H<0R
} ;5?$q
hxGZ}zq*S
} 6j+_)7.V
.9PPWY;H
改进后的归并排序: V`m'r+ Y
iO~3rWQ
package org.rut.util.algorithm.support; cE$7CSR
0ERA(=w5
import org.rut.util.algorithm.SortUtil; QGs\af
-xPv]j$
/** 1!~=8FTv
* @author treeroot @))PpE`co8
* @since 2006-2-2 qlNK }
* @version 1.0 \x5b=~/
*/ B;@7
public class ImprovedMergeSort implements SortUtil.Sort { fczId"
|gg6|,Bt4
private static final int THRESHOLD = 10; IZoS2^:yw
N^jQ\|A<
/* q ^Un,h64t
* (non-Javadoc) #41~`vq3
* 8XIG<Nc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &Rdg07e;>
*/ HN]roSt~
public void sort(int[] data) { Y92wL}
int[] temp=new int[data.length]; 4"U/T1&
mergeSort(data,temp,0,data.length-1); O4dJ> O
} =W$ f+
;shhgz$
private void mergeSort(int[] data, int[] temp, int l, int r) { UJ* D
int i, j, k; qwM71B!r
int mid = (l + r) / 2; 4}E|CD/pZ
if (l == r) 2+m%f"
return; B>hf|.GI
if ((mid - l) >= THRESHOLD) 50q(8F-N
mergeSort(data, temp, l, mid); Zn0e#n
else F !g>fIg
insertSort(data, l, mid - l + 1); o'O;69D]tX
if ((r - mid) > THRESHOLD) 7&;M"?m&
mergeSort(data, temp, mid + 1, r); Wa7-N4
else DybuLB$f
insertSort(data, mid + 1, r - mid); +}[M&D
~-ZquJ-
for (i = l; i <= mid; i++) { ?Dm={S6
temp = data; z3x/Y/X$S
} !tJQ75Hwv
for (j = 1; j <= r - mid; j++) { 7uQiP&v
temp[r - j + 1] = data[j + mid]; N@6+DHt
} 4c^WQ>[
int a = temp[l]; @)k/t>r(
int b = temp[r]; |mvY=t %
for (i = l, j = r, k = l; k <= r; k++) { KcKdhqdN-
if (a < b) { W<| M0S{
data[k] = temp[i++]; ]wb^5H
a = temp; e!k1GTH^
} else { Uq/FH@E=
data[k] = temp[j--]; AtU%S9
b = temp[j]; :+#$=4
} q(xr5iuP_
} AUjZYp
} a4aM.o
Wg{ 9X#|
/** ]t0]fb[J
* @param data o?5m^S14[1
* @param l W'lejOiw
* @param i |z1er"zR)
*/ 89n\$7Ff9
private void insertSort(int[] data, int start, int len) { &Z'3n9zl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ETZE.a
} ISa}Km>Q
} =`<9N%
} BPO)<bx_
} O?,Grn%'.
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堆排序： 4Ys\<\~d
CZZwBt$P
package org.rut.util.algorithm.support; wH]5VltUT1
Z;/QB6|%
import org.rut.util.algorithm.SortUtil; R` g'WaDk
N$ oQK(
/** NW]zMU{c
* @author treeroot 0nr5(4h
* @since 2006-2-2 JsP<etX
* @version 1.0 kB[l6`
*/ *RYok{w
public class HeapSort implements SortUtil.Sort{ /aV;EkyO,
x&p.-Fi
/* (non-Javadoc) 4yK{(!&i+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {<cL@W
*/ E4N/or
public void sort(int[] data) { <>v=jH|L
MaxHeap h=new MaxHeap(); q!;u4J
h.init(data); ~n=oPm$pR
for(int i=0;i h.remove(); 1S+lHG92I
System.arraycopy(h.queue,1,data,0,data.length); >\?RYy,s$
} P+L#p(K
J5!-<oJ/
private static class MaxHeap{ &M>o
-bd'sv
void init(int[] data){ EvYe1Y-
this.queue=new int[data.length+1]; p!o-+@ava
for(int i=0;i queue[++size]=data; \/s0p
fixUp(size); ZS<`.L6B3
} i&TWIl8
} =28ZSo^
H-,p.$3}
private int size=0; 5pU/X.lc
6bDizS}
private int[] queue; Hp>_:2O8s
"c.@4#/_
public int get() { h_HPmh5
return queue[1]; } fa
} Q7#t#XM
!^'6&NR#K
public void remove() { R=2"5Hy=
SortUtil.swap(queue,1,size--); mclV"?
fixDown(1); 1'!D
} [sNvCE$\]
file://fixdown bkuJN%
private void fixDown(int k) { ;i?rd f
int j; R`J.vMT
while ((j = k << 1) <= size) { -^Qm_lN
if (j < size %26amp;%26amp; queue[j] j++; 8VtRRtl
if (queue[k]>queue[j]) file://不用交换 /|8rVYSs
break; Y P,>vzW
SortUtil.swap(queue,j,k); K$l@0r ~k
k = j; .}5qi;CA
} Gs\D`|3=
} (tyky&$!
private void fixUp(int k) { )5NWUuH 5
while (k > 1) { l"1*0jgBw
int j = k >> 1; g[*"LOw
if (queue[j]>queue[k]) lMl'+ yy
break; 8aJJ??o{
SortUtil.swap(queue,j,k); ^/VnRpU
k = j; 6L;]5)#
} _e/Bg~
} Xr:s-L
{V pko
} mMvAA;
*\@RBJGF
} cF_`QRtO
NG`Y{QT6N
SortUtil： 9)8Cf%<(
sH>`eqY
package org.rut.util.algorithm; Qea"49R
dVk(R9 8
import org.rut.util.algorithm.support.BubbleSort; EDuH+/:n
import org.rut.util.algorithm.support.HeapSort; *VmX.
import org.rut.util.algorithm.support.ImprovedMergeSort; NMQG[py!f
import org.rut.util.algorithm.support.ImprovedQuickSort; VR .t
import org.rut.util.algorithm.support.InsertSort; 8rx|7
import org.rut.util.algorithm.support.MergeSort; 4l{$dtKbI
import org.rut.util.algorithm.support.QuickSort; R(*t1R\
import org.rut.util.algorithm.support.SelectionSort; 1Q!kk5jE
import org.rut.util.algorithm.support.ShellSort; rB{w4
,"KfZf;?
/** c1r+?q$f
* @author treeroot ~o/k?l
* @since 2006-2-2 SQhVdYU1'
* @version 1.0 7r50y>
*/ yj@k0TWT$
public class SortUtil { :<mJRsDf
public final static int INSERT = 1; F+GX{e7E\
public final static int BUBBLE = 2; /G|v.#2/g
public final static int SELECTION = 3; )[J@s=
public final static int SHELL = 4; )iM( \=1ff
public final static int QUICK = 5; :p,|6~b$
public final static int IMPROVED_QUICK = 6; ya{`gjIlW
public final static int MERGE = 7; ]jY^*o[
public final static int IMPROVED_MERGE = 8; -8Hc M\b
public final static int HEAP = 9; z9g ++]rkJ
U[|5:qWs
public static void sort(int[] data) { [u$|/
sort(data, IMPROVED_QUICK); i39ZBs@
} <i4]qO(0u
private static String[] name={ /t< &
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IC5QH<.$C
}; x.Egl4b3
%)r:!R~R
private static Sort[] impl=new Sort[]{ J <;xkT1x
new InsertSort(), iCA-X\E
new BubbleSort(), lVQE}gd%m
new SelectionSort(), (9oo8&GG
new ShellSort(), j7MUA#6$
new QuickSort(), !tt 8-Y)i
new ImprovedQuickSort(), Ws7fWK;
new MergeSort(), m[^)Q9o}
new ImprovedMergeSort(), .d}yQ#5z
new HeapSort() Ow*va\0
}; 5'eBeNxM
UWEegFq*
public static String toString(int algorithm){ U65l o[
return name[algorithm-1]; ?ueL'4Mm
} sT"ICooc
TIZ2'q5wg
public static void sort(int[] data, int algorithm) { 4r`I)
impl[algorithm-1].sort(data); <8;~4"'a
} 38T]qz[Sn
l`N4P
public static interface Sort { ;}?ZH4.S
public void sort(int[] data); YPGzI]\
} B1J,4
yf0v,]v[
public static void swap(int[] data, int i, int j) { pi~5}bF!a
int temp = data; 05k'TqT{c
data = data[j]; }nX0h6+1
data[j] = temp; ;Z"MO@9:
} gm2|`^Xq$
} 7Y[ q)lv