[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; V{qR/
} NcSi%]
int i1=l; '=K~M
int i2=mid+1; "Nq5FcS9
for(int cur=l;cur<=r;cur++){ ?$/W3Xn0%
if(i1==mid+1) {K/xI
data[cur]=temp[i2++]; i5*/ZA_
else if(i2>r) t`V U<
data[cur]=temp[i1++]; EzCi%>q
else if(temp[i1] data[cur]=temp[i1++]; }1sd<<\`
else su8()]|0x
data[cur]=temp[i2++]; [e:ccm
} ukD:4sv
} 2Aa
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} \[B#dw#
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改进后的归并排序: ?i~mt'O
9Z3Y,`R,
package org.rut.util.algorithm.support; =}SC .E\
"(\]-%:7
import org.rut.util.algorithm.SortUtil; x.(Sv]+[
}~<9*M-P
/** eE0nW+i
* @author treeroot \9:IL9~F
* @since 2006-2-2 #'y^@90R
* @version 1.0 D;DI8.4`N
*/ dFnu&u"
public class ImprovedMergeSort implements SortUtil.Sort { f2Tz5slE
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private static final int THRESHOLD = 10; yfAh=
h61BIc@>
/* +/#Lm#*nu%
* (non-Javadoc) $1D>}5Ex
* JU=4v!0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cT'<,#^/
*/ "j}fcrlG9
public void sort(int[] data) { M_;hfpJZ
int[] temp=new int[data.length]; N#X(gEV
mergeSort(data,temp,0,data.length-1); DCSTp2
} `hU2Ss~
+C=^,B!,
private void mergeSort(int[] data, int[] temp, int l, int r) { 1-pxM~Y
int i, j, k; c 9zMI
int mid = (l + r) / 2; F4&`0y:
if (l == r) 'd<1;Ayw
return; U {sT %G
if ((mid - l) >= THRESHOLD) =l}XKl->
mergeSort(data, temp, l, mid); ~NwX,-ri
else ?)/&tk9.n
insertSort(data, l, mid - l + 1); qI1JM =
if ((r - mid) > THRESHOLD) &[-b#&y
mergeSort(data, temp, mid + 1, r); mS-{AK
else >=L<3W1
insertSort(data, mid + 1, r - mid); a0B,[i
p+{*&Hm5
for (i = l; i <= mid; i++) { m'L8z fX
temp = data; XZpF<7l
} qMcOSZ%8J
for (j = 1; j <= r - mid; j++) { D{, b|4
temp[r - j + 1] = data[j + mid]; Z%Yq{tAt
} pQBhheiM
int a = temp[l]; Lq5Eu$;r
int b = temp[r]; zT _[pa)O`
for (i = l, j = r, k = l; k <= r; k++) { T_4y;mf!@O
if (a < b) { ^36m$J$
data[k] = temp[i++]; IdL~0;W7
a = temp; )9$>i5l
} else { ADlLodG
data[k] = temp[j--]; rp,PhS
b = temp[j]; P&8QKX3 j^
} |(UkI?V
} !XrnD#
} 2S_7!|j
3*[YM7y
/** 7D)i]68E
* @param data c UHKE\F
* @param l 7V7iIbi
* @param i .s>PDzM$
*/ #p|7\Y
private void insertSort(int[] data, int start, int len) { .^JsnP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;{Su:Ixg
} dW2Lvnh!>/
} B)(ZRH
} oi/bp#(fa
} ADVHi3b
Kx5VR4f`J@
堆排序： p#fV|2'
]$ iqJL
package org.rut.util.algorithm.support; gye'_AR?k
[n9X5qG~
import org.rut.util.algorithm.SortUtil; *D$Hd">X
hG%J:}
/** }SF<. A
* @author treeroot Cdbh7
* @since 2006-2-2 q.g0Oz@z
* @version 1.0 xO` O$ie
*/ [%yCnt
public class HeapSort implements SortUtil.Sort{ 58.b@@T
'"<h;|
/* (non-Javadoc) q8e34Ly7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^bDh[O
*/ m%G:|`f7
public void sort(int[] data) { 8X2NEVH]
MaxHeap h=new MaxHeap(); |dQ-l !
h.init(data); ojQjx|Q}
for(int i=0;i h.remove(); vd}Y$X
System.arraycopy(h.queue,1,data,0,data.length); ^SH8*7l7
} CYWL@<p,
Z4'8x h)-
private static class MaxHeap{ mtg3}etA
>YW_}kd
void init(int[] data){ 0]^ke:(#
this.queue=new int[data.length+1]; OKp0@A)8
for(int i=0;i queue[++size]=data; {Kkut?5
fixUp(size); 0h",.
} WT9k85hqj
} )=c/{
%nkP?gn"a
private int size=0; Xeo2 < @[
'WLh D<
private int[] queue; !XJS"owr
} :8{z`4H
public int get() { vpl> 5%
return queue[1]; V:vYS
} gu~F(Fb'
v*k}{M
public void remove() { o?l9$"\sqb
SortUtil.swap(queue,1,size--); \9}RAr#2]N
fixDown(1); 8LM 91
} /MUa b*h
file://fixdown ?$&iVN^UA
private void fixDown(int k) { P7`sJ("#
int j; !E+.(
while ((j = k << 1) <= size) { g1TMyIUt[
if (j < size %26amp;%26amp; queue[j] j++; +)eI8o0#
if (queue[k]>queue[j]) file://不用交换 ic_q<Y}
break; XFU['BI
SortUtil.swap(queue,j,k); 0pu=,
k = j; cK(S{|F
} :_y}8am;H~
} W~e/3#R\=
private void fixUp(int k) { Z}Ld!Byz
while (k > 1) { & NO:S
int j = k >> 1; orcPKCz|"
if (queue[j]>queue[k]) gwyHDSo8:a
break; hs5aIJ
SortUtil.swap(queue,j,k); |wFfVDp
k = j; m$X0O_*A
} &n)=OConge
} bdUe,2Yin
$ 3/G)/A
} qfQg?Mr
`x0GT\O2-
} !jeoB
#M5R>&?Jqz
SortUtil： AQH\ ;L
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package org.rut.util.algorithm; ,XJ Xw(LM
IY='tw
import org.rut.util.algorithm.support.BubbleSort; 'nO%1BZj+
import org.rut.util.algorithm.support.HeapSort; YAvOV-L
import org.rut.util.algorithm.support.ImprovedMergeSort; l&f"qF?
import org.rut.util.algorithm.support.ImprovedQuickSort; '4""Gz
import org.rut.util.algorithm.support.InsertSort; ^mA^7jB
import org.rut.util.algorithm.support.MergeSort; A*r6
import org.rut.util.algorithm.support.QuickSort; L\u6EMyV
import org.rut.util.algorithm.support.SelectionSort; T3W?-,
import org.rut.util.algorithm.support.ShellSort; )@O80uOFh
M@=eWZ<
/** >)sB#<e
* @author treeroot M' d ,TV[
* @since 2006-2-2 Hmi]qK[F
* @version 1.0 Y%B:IeF}
*/ 1D6F WYV8
public class SortUtil { 0A}'@N@G)
public final static int INSERT = 1; B7^*xskH
public final static int BUBBLE = 2; 5#|f:M]Bo|
public final static int SELECTION = 3; {xzs{)9|Y4
public final static int SHELL = 4; yp}a&Dg
public final static int QUICK = 5; hrRkam!y
public final static int IMPROVED_QUICK = 6; 2!u4nxZ.
public final static int MERGE = 7; wInJ!1
public final static int IMPROVED_MERGE = 8; }?0At<(d
public final static int HEAP = 9; 4*K~6Vh
]26 Q*.1~
public static void sort(int[] data) { (")IU{>c6
sort(data, IMPROVED_QUICK); 2Bf]#l{z
} iIe\mV
private static String[] name={ =68CR[H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E9]/sFA-]
}; .D~ZE94@
U{+<c [
private static Sort[] impl=new Sort[]{ /i${[1
new InsertSort(), c%N8|!e
new BubbleSort(), e95x,|.-_
new SelectionSort(), BO3#*J5S\
new ShellSort(), jgfl|;I?pg
new QuickSort(), ;U02VguC
new ImprovedQuickSort(), xTy[X"sJ
new MergeSort(), TbY<(wrMZ
new ImprovedMergeSort(), ac-R q.GQY
new HeapSort() uTemAIp $u
}; )9.i'{{ 0
iL%Q@!ka
public static String toString(int algorithm){ m3cO{ 1I
return name[algorithm-1]; a2{nrGD
} ?-y!FD}m&
\ nIz5J}3
public static void sort(int[] data, int algorithm) { LZ97nvK
impl[algorithm-1].sort(data); uEK9
} QL<uQ`>(
1h"CjOp,7
public static interface Sort { u9.x31^
public void sort(int[] data); 5L'bF2SI
} $!(J4v=X
Vh.9/$xQ
public static void swap(int[] data, int i, int j) { ^X&n-ui
int temp = data; IwE{Zvr
data = data[j]; w4S0aR:yL
data[j] = temp; Hq[vh7Lux
} 'g4t !__
} qM."W=XVN