[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; xi]qdiA
} I3A@0'Vm;L
int i1=l; 4q`$nI Bi
int i2=mid+1; (\ze T5
for(int cur=l;cur<=r;cur++){ P-?ya!@"
if(i1==mid+1) Ed%8| M3
data[cur]=temp[i2++]; J0e~s
else if(i2>r) h] (BTb#-
data[cur]=temp[i1++]; qd9CKd
else if(temp[i1] data[cur]=temp[i1++]; sz'IGy%
else /\S1p3EW*
data[cur]=temp[i2++]; lqO"
} {o?+T);Z
} 6}YWM]c%
D|u! KH
} 0{/P1
f*VBSg[`
改进后的归并排序: g9fS|T
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package org.rut.util.algorithm.support; 7[wHNJ7)r
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import org.rut.util.algorithm.SortUtil; Cc?BJ
)19As8rL/o
/** B*+3A!{s
* @author treeroot idLysxN
* @since 2006-2-2 QeYO)sc`
* @version 1.0 K0#kW \4`
*/ asDq(J`sQ
public class ImprovedMergeSort implements SortUtil.Sort { 'Jb6CRn
lD;="b
private static final int THRESHOLD = 10; S aCa
BTXS+mvl
/* [/}y!;3iXM
* (non-Javadoc) %E95R8SL
* #OKzJ"g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I<q=lK
*/ s}]qlg
public void sort(int[] data) { sbZ$h <
int[] temp=new int[data.length]; 7a@%^G @!
mergeSort(data,temp,0,data.length-1); 17Q1Xa
} :>U2yI
0W|}5(C
private void mergeSort(int[] data, int[] temp, int l, int r) { 6t0!a@t
int i, j, k; %-y%Q.;k?
int mid = (l + r) / 2; %ec9`0^4S
if (l == r) E\V-<]o
return; gWo`i
if ((mid - l) >= THRESHOLD) x~Egax
mergeSort(data, temp, l, mid); oaI|A^v
else ESk<*-
insertSort(data, l, mid - l + 1); lF]cUp#<
if ((r - mid) > THRESHOLD) U2*g9Es
mergeSort(data, temp, mid + 1, r); 78v4cQ Y
else LFsrqdzJ
insertSort(data, mid + 1, r - mid); x&6SjlDb$K
(vCMff/ Y1
for (i = l; i <= mid; i++) { B/S~Jn
temp = data; \bze-|C
} W?;kMGW-
for (j = 1; j <= r - mid; j++) { UXz0HRRS0
temp[r - j + 1] = data[j + mid]; B!|<<;Da6
} ~c>*3*
int a = temp[l]; C3n_'O
int b = temp[r]; 2\flTO2Ny
for (i = l, j = r, k = l; k <= r; k++) { 4J=6A4O5Z
if (a < b) { K-&&%Id6R
data[k] = temp[i++]; pA(B~9WQ
a = temp; D(}w$hi8
} else { D];%Ey
data[k] = temp[j--]; ,6,sz]3-
b = temp[j]; bWN%dn$$M
} ,EyZ2`|
} #rL%K3'
} j rX.e
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/** b[Z5:[@\#
* @param data &uwj&-u?
* @param l {{b&l!
* @param i RbUhLcG5
*/ C9-IJj
private void insertSort(int[] data, int start, int len) { \{F{yq(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nezdk=8J/
} vEJ2d&
} 9$&+0
} hlPZTr=a
} 9Foo8e
p`// *gl
堆排序： Byf5~OC
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package org.rut.util.algorithm.support; T:ye2yg
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import org.rut.util.algorithm.SortUtil; d'~sy>
8}m bfuo1
/** <szD"p|K
* @author treeroot =%,;=4w
* @since 2006-2-2 VeixwGZ.
* @version 1.0 z4f\0uQ
*/ x0^O?UR
public class HeapSort implements SortUtil.Sort{ O$}p}%%y7
v\Zni4
/* (non-Javadoc) tGGv 2TCEy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T+z]ztO
*/ pK=$)<I"6
public void sort(int[] data) { 90)0\i+P
MaxHeap h=new MaxHeap(); w ^ v*1KA&
h.init(data); 2Yd0:$a
for(int i=0;i h.remove(); t+'|&b][Qi
System.arraycopy(h.queue,1,data,0,data.length); ,3_;JT"5
} R:zPU
+NGjDa
private static class MaxHeap{ acuch
(pBOv:6
void init(int[] data){ i"=6n>\
this.queue=new int[data.length+1]; b#U nE
for(int i=0;i queue[++size]=data; Txkmt$h
fixUp(size); SFrQPdX6V
} E#t;G:+A
} zzsQfI#
v,Lv4)
private int size=0; P-9[,3Zd
3$Ew55
private int[] queue; "(y",!U@
-TKS`,#
public int get() { 70p1&Y7or
return queue[1]; 8X=cGYC#
} <vx/pH)f
rrK&XP&
public void remove() { f,9jK9/$
SortUtil.swap(queue,1,size--); (~F{c0\C
fixDown(1); O5HK2Xg,C
} fY@Y$S`Fh
file://fixdown yjZ]_.
private void fixDown(int k) { p<1z!`!P
int j; _@CY_`a
while ((j = k << 1) <= size) { ;Ee!vqD2
if (j < size %26amp;%26amp; queue[j] j++; u.( WW(/N
if (queue[k]>queue[j]) file://不用交换 QFOmnbJg
break; wD|,G!8E2
SortUtil.swap(queue,j,k); #L}YZ
k = j; uGm~ Oo
} ^R* _Q,o#
} kCkSu-
private void fixUp(int k) { NvH9?Ek"
while (k > 1) { m1x7f%_
int j = k >> 1; ,lX5-1H
if (queue[j]>queue[k]) VuqN)CE^Uq
break; OU;R;=/]
SortUtil.swap(queue,j,k); >$,A [|R
k = j; &V7@ TZ
} .'o<.\R8
} &V5[Zj|]
f}q4~NPn-
} ,]?Xf>
=[%ge{,t
} :USN`"
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SortUtil： 12 HBq8o
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package org.rut.util.algorithm; }qy,/<R
~m^.&mv3/
import org.rut.util.algorithm.support.BubbleSort; ~ZeF5
import org.rut.util.algorithm.support.HeapSort; (9:MIP
import org.rut.util.algorithm.support.ImprovedMergeSort; 6@pPaq6
import org.rut.util.algorithm.support.ImprovedQuickSort; xW@y=l Cu
import org.rut.util.algorithm.support.InsertSort; J2cqnwUV
import org.rut.util.algorithm.support.MergeSort; Wz)O,X^
import org.rut.util.algorithm.support.QuickSort; 0yW#).D^b
import org.rut.util.algorithm.support.SelectionSort; m&/{iCwp
import org.rut.util.algorithm.support.ShellSort; ;h[p "
;V(- ;O
/** 8wGq:@#=
* @author treeroot vK2sj1Hzr
* @since 2006-2-2 ~l$u~:4Ob
* @version 1.0 nR)/k,3W
*/ 1e`/N+6u
public class SortUtil { Df;EemCh
public final static int INSERT = 1; >|%dN jf@Q
public final static int BUBBLE = 2; RUcpdeo
public final static int SELECTION = 3; 5/j7C>
public final static int SHELL = 4; hwF9LD~^
public final static int QUICK = 5; UhuEE
public final static int IMPROVED_QUICK = 6; b%`^KEvwfo
public final static int MERGE = 7; utIR\e#:B
public final static int IMPROVED_MERGE = 8; :V1ttRW}52
public final static int HEAP = 9; eliT<sw8
[{.e1s<EK
public static void sort(int[] data) { OiI[w8
sort(data, IMPROVED_QUICK); #<ppiu$
} r|$@Wsb?#
private static String[] name={ ~(E.$y7P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }{>)2S
}; j8p</gd
nn>1OO
private static Sort[] impl=new Sort[]{ ""cnZZ5)
new InsertSort(), 4yhan/zA
new BubbleSort(), ^LfN6{
new SelectionSort(), H/8H`9S$
new ShellSort(), <CrNDY
new QuickSort(), N@D]Q&;+(T
new ImprovedQuickSort(), 8S2sNpLi-g
new MergeSort(), *`~ woF
new ImprovedMergeSort(), dQUZ11
new HeapSort() ^z&eD,
}; -2NXQ+m ;
{)j~5m.,/o
public static String toString(int algorithm){ Oax*3TD
return name[algorithm-1]; #+)AIf
} I&9_F%rX
V~j:!=b%v
public static void sort(int[] data, int algorithm) { f,QoA
impl[algorithm-1].sort(data); "`P/j+-rt
} `#O%ZZ+
ML6Y_|6 |
public static interface Sort { H;('h#=cD
public void sort(int[] data); U5X\RXy~
} *1FDK{
zTtn`j$
public static void swap(int[] data, int i, int j) { p<b//^
int temp = data; &L3OP@;
data = data[j]; BJGL &N
data[j] = temp; 5,/rh,?
} N ]KS\
} I'&#pOB