[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; e6i m_ Tk
} :\"V5
int i1=l; ,Zva^5
int i2=mid+1; \"|7o8
for(int cur=l;cur<=r;cur++){ vUR@P -
if(i1==mid+1) wv.HPmq
data[cur]=temp[i2++]; Yl`)%6'5|
else if(i2>r) (&!x2M
data[cur]=temp[i1++]; (7A-cC
else if(temp[i1] data[cur]=temp[i1++]; 2hf7F";Af
else O gtrp)x9
data[cur]=temp[i2++]; RQ;}+S
} H$k2S5,,z
} 8zrLl:{
3y}8|ML
} E#VF7 9L
2I>`{#fV
改进后的归并排序: r:U/a=V
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package org.rut.util.algorithm.support; aflBDo1c
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import org.rut.util.algorithm.SortUtil; a^7HI,
uWkn}P
/** *q*$%H
* @author treeroot eE5j6`5i
* @since 2006-2-2 1xDh[:6
* @version 1.0 q+U&lw|"w
*/ !%(PN3*
public class ImprovedMergeSort implements SortUtil.Sort { Ya29t98Pk
sI5S)^'IQ
private static final int THRESHOLD = 10; 0gsRBy
Nz%Yi?AF
/* I\<)9`O
* (non-Javadoc) $6~t|[7:%Y
* P{2j31u`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hiw>Q7W
*/ b6d}<b9#
public void sort(int[] data) { 7qLB9r
int[] temp=new int[data.length]; M-/2{F[
mergeSort(data,temp,0,data.length-1); S#b)RpY
} sf Zb$T J
>)edha*W]
private void mergeSort(int[] data, int[] temp, int l, int r) { )S^[b2P]y_
int i, j, k; NArr2o2
int mid = (l + r) / 2; xp F(de
if (l == r) W.^R/s8O%5
return; T-y5U},
if ((mid - l) >= THRESHOLD) P*/ig0_fM
mergeSort(data, temp, l, mid); ^[.Z~>3!\q
else =\IUBH+C
insertSort(data, l, mid - l + 1); ]VoJ7LoCZ'
if ((r - mid) > THRESHOLD) "J{A}g[
mergeSort(data, temp, mid + 1, r); [8'^"
else NL-V",gI-~
insertSort(data, mid + 1, r - mid); z,g\7F[
ttY[\D&ZS
for (i = l; i <= mid; i++) { &HtG&RvQf
temp = data; *YP:-
} 8 Y))/]R
for (j = 1; j <= r - mid; j++) { R,`3 SW()
temp[r - j + 1] = data[j + mid]; ltlnXjRUv
} OWZ;X}x
int a = temp[l]; .RpWE.C
int b = temp[r]; >">grDX
for (i = l, j = r, k = l; k <= r; k++) { ss4YeZa
if (a < b) { hu5o{8[
data[k] = temp[i++]; kC iOcl*$
a = temp; ut^6UdJ+`
} else { 6E$ET5p&l
data[k] = temp[j--]; &sooXKlv|
b = temp[j]; 0QY9vuhL<
} Ga\kvMtr
} v+W4wD
} &#;lmYyaui
wPvYnhr|G-
/** `S|T&|ad0
* @param data xTy)qN]P
* @param l `8kL=%(h
* @param i W?gelu]
*/ 3 (F+\4aRm
private void insertSort(int[] data, int start, int len) { {Z}zT1kA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); < 49\B
} M%2w[<-8c
} co*XW
} j/uzsu+
} a*qc
87rHW@\](
堆排序： QPX3a8w*
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package org.rut.util.algorithm.support; n9Ktn}
u-=VrHff^*
import org.rut.util.algorithm.SortUtil; J+=?taZ
K1t>5zm
/** V U~r~
* @author treeroot COcS w
* @since 2006-2-2 mW1T4rR'
* @version 1.0 g2 tM!IRQ
*/ ;FnS=Z
public class HeapSort implements SortUtil.Sort{ OE2r2ad
)D"2Q:
/* (non-Javadoc) v[~Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?I7%ueFY
*/ B<jVo%og
public void sort(int[] data) { R) J/z
MaxHeap h=new MaxHeap(); Xz"xp8Hc(6
h.init(data); ;O {"\H6
for(int i=0;i h.remove(); Nuaq{cl
System.arraycopy(h.queue,1,data,0,data.length); V82hk0*j
} V1\Rj0#G
s'$3bLcb
private static class MaxHeap{ k<
' BY|7j~
void init(int[] data){ Tua#~.3}J
this.queue=new int[data.length+1]; }Io5&ww:U
for(int i=0;i queue[++size]=data; eV\VR !!i
fixUp(size); U,V+qnS
} *rmM2{6
} S'=}eeG
7w.9PNhy
private int size=0; uE'Kk8
RP%FMb}nt
private int[] queue; LUEZqIf
[{6fyd;
public int get() { vOU9[n N[
return queue[1]; bdHHOpXM
} Q@/Z~xw"'I
8>[o.xV
public void remove() { >njX=r.
SortUtil.swap(queue,1,size--); bf6:J `5Z
fixDown(1); ?L6pB]l8b
} < mp_[-c
file://fixdown v8>bR|n5
private void fixDown(int k) { 0?=a$0_C
int j; U<wM#l P|Z
while ((j = k << 1) <= size) { Sw`+4 4
if (j < size %26amp;%26amp; queue[j] j++; ;Mz7emt
if (queue[k]>queue[j]) file://不用交换 \`-a'u=S
break; _z53r+A
SortUtil.swap(queue,j,k); ITfz/d8
k = j; ?cB26Zrcb
} {=9"WN
} (1Klj+"p%
private void fixUp(int k) { ->2m/d4a
while (k > 1) { r?HbApV P
int j = k >> 1; GxA[N
if (queue[j]>queue[k]) QFIYnxY9
break; 6b\JD.r*{
SortUtil.swap(queue,j,k); 4oN*J +"=+
k = j; :i* =s}cv
} ;-8]
} $tDM U3,W
|A#\5u
} Y/y`c-VO
z|O3pQn~
} j{Sbf04
F-GH?sfvi
SortUtil： [m(n-MuF
(PSL[P
package org.rut.util.algorithm; w9C?wT
Wx|De7*
import org.rut.util.algorithm.support.BubbleSort; uVa`2]NV r
import org.rut.util.algorithm.support.HeapSort; YFeL#)5y
import org.rut.util.algorithm.support.ImprovedMergeSort; ))E| SAr
import org.rut.util.algorithm.support.ImprovedQuickSort; 63c\1]YB.
import org.rut.util.algorithm.support.InsertSort; 64t:
import org.rut.util.algorithm.support.MergeSort; !&R|P|7qN}
import org.rut.util.algorithm.support.QuickSort; a=M/0N{!
import org.rut.util.algorithm.support.SelectionSort; )jm!^m
import org.rut.util.algorithm.support.ShellSort; 4c@_u8
1:Wl/9mL
/** K1zH\wH
* @author treeroot q:9CFAX0=
* @since 2006-2-2 "-g5$v$de
* @version 1.0 ?7TuE!!M
*/ bkiMF$K,K
public class SortUtil { E6fs&
public final static int INSERT = 1; {gI%-
public final static int BUBBLE = 2; $j/#IzD1D
public final static int SELECTION = 3; ]:~z#k|2@6
public final static int SHELL = 4; xPzBbe
public final static int QUICK = 5; X08[,P#I
public final static int IMPROVED_QUICK = 6; GB}!7W"
public final static int MERGE = 7; K k|mV&3J
public final static int IMPROVED_MERGE = 8; A5RM&y
public final static int HEAP = 9; o>A']+`Eu
_Q7]Dw/w\
public static void sort(int[] data) { {2LV0:k2
sort(data, IMPROVED_QUICK); m3=Cg$n
} [midNC+,
private static String[] name={ v;d3uunqv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d^I:{Ii'
}; c=33O,_
a|Wrc)UR
private static Sort[] impl=new Sort[]{ ^tI4FQ>Y
new InsertSort(), x]vyt}oCmk
new BubbleSort(), Q$A;Fk}-
new SelectionSort(), .7> g8
new ShellSort(), bZu2.?{
new QuickSort(), jfpbD /
new ImprovedQuickSort(), =1zRm >m
new MergeSort(), |l:,EA_v|
new ImprovedMergeSort(), fHXz{,?/w
new HeapSort() p%IVWeZnx
}; 9b)'vr*Hy7
fk\hrVP
public static String toString(int algorithm){ jRhRw;
return name[algorithm-1]; "89L^I
} rAS2qt
Vn?|\3KY
public static void sort(int[] data, int algorithm) { 69N8COLB
impl[algorithm-1].sort(data); >Y;[+#H[
} ~z7Fz"o<
scZ&}Ni
public static interface Sort { <%S[6*6U
public void sort(int[] data); o^Qy71Uj
} '25zb+-
<=@6UPsn2
public static void swap(int[] data, int i, int j) { ';I(#J6
int temp = data; CIAKXYM
data = data[j]; $>hH{
data[j] = temp; ORFi0gFbA
} mX GW+
} :b<<