[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; 'Z{`P0/^o`
} Jt_=aMY:7
int i1=l; *k{Llq
int i2=mid+1; b)diYsTH
for(int cur=l;cur<=r;cur++){ Kxsd@^E
if(i1==mid+1) MntmBj-T
data[cur]=temp[i2++]; aTvyzr1
else if(i2>r) C'JI%HnQ
data[cur]=temp[i1++]; TO6F
else if(temp[i1] data[cur]=temp[i1++]; =XfvPBA
else o?baiOkH
data[cur]=temp[i2++]; \.i7(J]
} '12m4quO
} Hn/t'D3
y\FQt];z)
} #{6VdWZ
T|~5dZL
改进后的归并排序: ~c EN=(Z~r
3H#,qug$
package org.rut.util.algorithm.support; S5).\1m h[
YWIA(p8Qkk
import org.rut.util.algorithm.SortUtil; G*=HjLmZg
!VD$uT
/** (HAdr5
* @author treeroot 6tH}&#K
* @since 2006-2-2 x6/u+Urn
* @version 1.0 x1@,k=qrd
*/ IVxJN(N^
public class ImprovedMergeSort implements SortUtil.Sort { OLG)D#m(4/
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private static final int THRESHOLD = 10; 1I2ndt
+L09^I
/* Ftyxz&-4$p
* (non-Javadoc) ie1~QQ
* %DttkrhL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !zK"y[V
*/ E2zL-ft.
public void sort(int[] data) { >)4~,-;k
int[] temp=new int[data.length]; (#dR\Di
mergeSort(data,temp,0,data.length-1); jZ~girA
} o6u^hG6~'
c44s@E
private void mergeSort(int[] data, int[] temp, int l, int r) { #66i!}
int i, j, k; YIN* '!N
int mid = (l + r) / 2; `Am|9LOT
if (l == r) y>C !cYB
return; "smU5 s,P
if ((mid - l) >= THRESHOLD) L 0Ckw},,
mergeSort(data, temp, l, mid); \4 b^*`d
else 9"[,9HN
insertSort(data, l, mid - l + 1); %g?M?D8Ud3
if ((r - mid) > THRESHOLD) v}!lx)#
mergeSort(data, temp, mid + 1, r); %RW*gUvc]
else Ja1`S+
insertSort(data, mid + 1, r - mid); `@y~JNf!
TFHYB9vV
for (i = l; i <= mid; i++) { @kSfF[4H
temp = data; .nY}_&
} Q%6zr9
for (j = 1; j <= r - mid; j++) { D&fOZVuqZ
temp[r - j + 1] = data[j + mid]; >FeCa hFn
} 56Lxr{+X
int a = temp[l]; !~zn*Hm
int b = temp[r]; "C}<umJ'
for (i = l, j = r, k = l; k <= r; k++) { 92j[b_P
if (a < b) { (%6fZ
data[k] = temp[i++]; O}C*weU
a = temp; 6EY\
} else { tO&n$$
data[k] = temp[j--]; "y8W5R5kL4
b = temp[j]; TTO8tT3[6}
} -[*y{K@dh
} %Ja0:e
} &tUX(
:H>I`)bw
/** I*3>>VN
* @param data [#!Y7Ede
* @param l q>+!Ete1p
* @param i NP3 e^
*/ HMD\)vMK6
private void insertSort(int[] data, int start, int len) { E!X>C^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yFm88
} )W_akUL
} ;QVTb3Th
} |QZ E
} *QN,wBQ
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堆排序： <XrXs
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package org.rut.util.algorithm.support; "Pc}-&
JV,h1/a("
import org.rut.util.algorithm.SortUtil; |a)zuC
# a4OtRiI
/** F(j;|okf;
* @author treeroot Ro{xprE1
* @since 2006-2-2 BJ_"FG
* @version 1.0 jcC"vr'u|
*/ )M8,Tv*~
public class HeapSort implements SortUtil.Sort{ zv"NbN
id,'+<
/* (non-Javadoc) Xtz29
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mCn:{G8+
*/ .Tl,Ek(
public void sort(int[] data) { ;eo}/-a_Xw
MaxHeap h=new MaxHeap(); ^$`mS&3/q
h.init(data); ;[4=?GL*
for(int i=0;i h.remove(); Fsl="RB7f
System.arraycopy(h.queue,1,data,0,data.length); O=LW[h!
} \R9izuc9
[zl4"|_`
private static class MaxHeap{ 'Jek< 5
!5'4FUlJ
void init(int[] data){ e)s l
this.queue=new int[data.length+1]; WNeBthq6
for(int i=0;i queue[++size]=data; "([gN:
fixUp(size); e1b?TF@lz
} Q e/XEW
} +P9eE,WR
r(>812^\
private int size=0; xxg/vaQt=s
!Mgo~h"]#
private int[] queue; EXbZ9 o*
Txl|F\nK`
public int get() { ;Y8>?
return queue[1]; #I MaN%
} v2r|)c,h
wQ/.3V[
public void remove() { h=6D=6c
SortUtil.swap(queue,1,size--); com4@NK
fixDown(1); s;l"'6:_
} &E6V'*<93
file://fixdown mcidA%
private void fixDown(int k) { o&M.9V?~~
int j; uF[*@N
while ((j = k << 1) <= size) { Xe:rPxZf~
if (j < size %26amp;%26amp; queue[j] j++; V$FZVG/@#
if (queue[k]>queue[j]) file://不用交换 NB44GP1-@
break; +BO kHXk1
SortUtil.swap(queue,j,k); -awG14%
k = j; Kwm_Y5`A
} X. Ur`X
} LN.*gGl
private void fixUp(int k) { \N-3JOVy
while (k > 1) { F+NX [
int j = k >> 1; U8gj\G\`
if (queue[j]>queue[k]) 3mopTzs)
break; R'vNJDFY
SortUtil.swap(queue,j,k); 3(t3r::&
k = j; J"S(GL
} wKpb%3
} KiFTj$w,
)/[L)-~y~
} XM"Qs.E
G=gU|& (
} }/\`'LQ
x)Zm5&"Gg
SortUtil： p{v*/<.;
Zl'/Mxg
package org.rut.util.algorithm; h-O;5.m-P
@vib54G
import org.rut.util.algorithm.support.BubbleSort; ?7lW@U0
import org.rut.util.algorithm.support.HeapSort; oa=TlBk<
import org.rut.util.algorithm.support.ImprovedMergeSort; *_J{_7pwe
import org.rut.util.algorithm.support.ImprovedQuickSort; _<F;&(o
import org.rut.util.algorithm.support.InsertSort; N^wHO<IO1
import org.rut.util.algorithm.support.MergeSort; =j~:u.hc'
import org.rut.util.algorithm.support.QuickSort; o%`=+-K
import org.rut.util.algorithm.support.SelectionSort; 'Q7^bF^
import org.rut.util.algorithm.support.ShellSort; N(yd<Mw
vf#d
/** \et2aX !
* @author treeroot /:{4,aX2
* @since 2006-2-2 RL\?i~'KH
* @version 1.0 <}'=@a
*/ G,B4=[Y
public class SortUtil { ;!=i|"PG
public final static int INSERT = 1; X@:Y./
public final static int BUBBLE = 2; ?*xH HI/
public final static int SELECTION = 3; ~:0w%
public final static int SHELL = 4; oP4+:r)LKD
public final static int QUICK = 5; <s\ZqL$f
public final static int IMPROVED_QUICK = 6; h6IXD N
public final static int MERGE = 7; fE)o-q6Z
public final static int IMPROVED_MERGE = 8; 6ce-92n
public final static int HEAP = 9; 3OKs?i3A
]jiVe_ OS<
public static void sort(int[] data) { Zo^]y'
sort(data, IMPROVED_QUICK); '/X]96Ci7
} !\BM
private static String[] name={ v.4G>00^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n53c}^
}; 3HuGb^SNg
6rD]6#D
private static Sort[] impl=new Sort[]{ E8R;S}PA
new InsertSort(), S-3hLw&?
new BubbleSort(), RjgJIVm(
new SelectionSort(), ":s_O.
new ShellSort(), WcM\4q@
new QuickSort(), >KdV]!H
new ImprovedQuickSort(), );q~TZ[Do
new MergeSort(), #pK" ^O*!
new ImprovedMergeSort(), S-Bx`e9'
new HeapSort() i'>5vU0?3
}; |#SZdXg
v@M^ukk'}
public static String toString(int algorithm){ /K1cP>oE
return name[algorithm-1]; h7T),UL
} `F&~SU,
u,d5/`E
public static void sort(int[] data, int algorithm) { )u=W?5%=}
impl[algorithm-1].sort(data); y5O &9Ckw
} 79d(UG'O
XpE847!soL
public static interface Sort { Suo$wZ7J
public void sort(int[] data); }P{Wk7#Jq
} <Q- m &
;y1/b(t
public static void swap(int[] data, int i, int j) { yf8kBT:&S
int temp = data; \weg%a
data = data[j]; tk=S4/VWv
data[j] = temp; YOrq)_ l
} 7:b.c
} eMFxdtH