[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; <ut DZ#k
} QP[a^5;Tt
int i1=l; (K6`nWk2
int i2=mid+1; $048y X 7M
for(int cur=l;cur<=r;cur++){ h*KHEg"+
if(i1==mid+1) $ tNhwF
data[cur]=temp[i2++]; rc$!$~|I3Z
else if(i2>r) ,/:a77
data[cur]=temp[i1++]; AMd)d^;
else if(temp[i1] data[cur]=temp[i1++]; 4LEE /
else E.`dk.
data[cur]=temp[i2++]; )h0E$*
} ^B5cNEO
} dn\F!
b H?qijrC
} dl6v <
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改进后的归并排序: 7F(F.ut
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package org.rut.util.algorithm.support; VMIX$#
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import org.rut.util.algorithm.SortUtil; -+rF]|Wi
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/** paNw5] -
* @author treeroot GD[ou.C}k
* @since 2006-2-2 X^D9)kel
* @version 1.0 s!'A\nVV1$
*/ o~x39
public class ImprovedMergeSort implements SortUtil.Sort { =b<<5N s
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private static final int THRESHOLD = 10; zg7l>9Sc
'K3s4x($
/* T]6c9_
* (non-Javadoc) `GQiB]Z
* akhL\-d)al
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,B%fjcn
*/ E ;!<Z4
public void sort(int[] data) { G|-\T(&J
int[] temp=new int[data.length]; #t@x6Vt
mergeSort(data,temp,0,data.length-1); )J+{oB[>b
} r)p2'+}pV
;}WtJ&y=M
private void mergeSort(int[] data, int[] temp, int l, int r) { adI!W-/R:
int i, j, k; ;4G\]%c)E{
int mid = (l + r) / 2; @?Gw|bP
if (l == r) n#>.\F
return; 4Oy.,MDQP
if ((mid - l) >= THRESHOLD) t0bhXFaiE
mergeSort(data, temp, l, mid); ;tp]^iB#
else :4ja@~
insertSort(data, l, mid - l + 1); ov`^o25f
if ((r - mid) > THRESHOLD) eA?uny f2r
mergeSort(data, temp, mid + 1, r); !ww:O|0
else @VC .>
insertSort(data, mid + 1, r - mid); +9zJlL^A%
DB`$Ru@
for (i = l; i <= mid; i++) { #0bO)m+NZ
temp = data; Q1`<fD
} :}@C9pqr2
for (j = 1; j <= r - mid; j++) { Dxt),4%P
temp[r - j + 1] = data[j + mid]; o)%-l4S
} U~:N^Sc
int a = temp[l]; U{uPt*GUd/
int b = temp[r]; RpO@pd m
for (i = l, j = r, k = l; k <= r; k++) { Y=vVxVI\
if (a < b) { ?P""KVpo
data[k] = temp[i++]; xF( bS+(o
a = temp; ;)(Sdf[P
} else { EBoGJ_l
data[k] = temp[j--]; zoZ<)x=;
b = temp[j]; >4n+PXRXX
} J~Cc9"(
} lWx
} 3CR@' qG-
/?KtXV>]
/** Ih.rC>)rx
* @param data Deg!<[Nw
* @param l q$r&4s)To
* @param i b4>``n
*/ -S"5{N73
private void insertSort(int[] data, int start, int len) { 60!1D>,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gNShOu
} )~ 0}Et l
} U1ZIuDg'E
} ~xGoJrF\
} +I t#Z3
%*wzO9w4
堆排序： +R-h ,$\=7
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package org.rut.util.algorithm.support; 2w+U$6e C
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import org.rut.util.algorithm.SortUtil; Hd9XfU
.%=V">R
/** -?s&pKi
* @author treeroot {esJ=FV\
* @since 2006-2-2 +nZUL*Ut/
* @version 1.0 LL&ud_Y
*/ *?/tO, R?
public class HeapSort implements SortUtil.Sort{ <,"4k&0Q>V
0ZMJ(C
/* (non-Javadoc) {;s;.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oM!xz1kVL
*/ e}'gvm
public void sort(int[] data) { :\XI0E
MaxHeap h=new MaxHeap(); S,)d(g3>
h.init(data); jMM$d,7B
for(int i=0;i h.remove(); f`jc#f5+'
System.arraycopy(h.queue,1,data,0,data.length); ^$v3eKA
} A /(lKq
b_TS<,
private static class MaxHeap{ `K*b?:0lp
c.AYxI"
void init(int[] data){ ';0 qj$#
this.queue=new int[data.length+1]; As~(7?]r
for(int i=0;i queue[++size]=data; {:Aw_z:'
fixUp(size); O.,3|
} s,6`RI%
} F>zl9Vi<
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private int size=0; $=B8qZ+
oc7$H>ET1
private int[] queue; K*q[(,9
(hB?
public int get() { (-0ePSOG
return queue[1]; j~E",7Q'
} ~gE:-
'OkGReKt
public void remove() { 8'Z:ydj^,
SortUtil.swap(queue,1,size--); >5hhd38
fixDown(1); 'm3t|:nMU
} MP^ d}FL
file://fixdown ,HB2hHD
private void fixDown(int k) { T f4tj!t-
int j; 8j5<6Cv_
while ((j = k << 1) <= size) { R'}95S<
if (j < size %26amp;%26amp; queue[j] j++; J-xS:Ha'l
if (queue[k]>queue[j]) file://不用交换 %zBCq"y
break; WOLuw%
SortUtil.swap(queue,j,k); z'7[Tie
k = j; M;w?[yEZ
} KS}hU~
} izgp*M,
private void fixUp(int k) { 'sh~,+g
while (k > 1) { r%@Lej5+
int j = k >> 1; s 5WqR8
if (queue[j]>queue[k]) Z[Qza13lo
break; "9!d]2.-Vk
SortUtil.swap(queue,j,k); =<}<Ny
k = j; ;5_{MCPM
} q:\g^_!OGA
} 2P#=a?~[
O.`Jl%
} ;U9J++\d<A
q h/F
} Z@a9mFI?
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SortUtil： lot%N(mB`
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package org.rut.util.algorithm; !Ucjax~
$+JS&k/'m
import org.rut.util.algorithm.support.BubbleSort; te|?)j
import org.rut.util.algorithm.support.HeapSort; 9,uhfb^]
import org.rut.util.algorithm.support.ImprovedMergeSort; Vd^g9
import org.rut.util.algorithm.support.ImprovedQuickSort; dZ#&YG)?e
import org.rut.util.algorithm.support.InsertSort; Q;11N7+
import org.rut.util.algorithm.support.MergeSort; Kt@M)#
import org.rut.util.algorithm.support.QuickSort; ;~fT,7qBah
import org.rut.util.algorithm.support.SelectionSort; T>TWU:
import org.rut.util.algorithm.support.ShellSort; r{\1wt
zgx&Pte
/** SIO&rrT.
* @author treeroot > fnh+M
* @since 2006-2-2 dr)YzOvba
* @version 1.0 -9N@$+T
*/ pl@O N"=[
public class SortUtil { j',W 64
public final static int INSERT = 1; P-F)%T[
public final static int BUBBLE = 2; |4$M]Mf0
public final static int SELECTION = 3; &'cL%.
public final static int SHELL = 4; O~j> ?
public final static int QUICK = 5; XL#[%X9
public final static int IMPROVED_QUICK = 6; !cKz7?w
public final static int MERGE = 7; ? WJ> p
public final static int IMPROVED_MERGE = 8; CYOI.#m2
public final static int HEAP = 9; 8!.ojdyn
QXCH(5as
public static void sort(int[] data) { V5+SWXZ
sort(data, IMPROVED_QUICK); l/;X?g5+
} mF` B#
private static String[] name={ n>@oBG)!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :#dE:L;T
}; NM ]bgpP
6'\6OsH
private static Sort[] impl=new Sort[]{ OL4z%mDZi
new InsertSort(), 8XbA'% o
new BubbleSort(), rG,5[/l
new SelectionSort(), z-M3
new ShellSort(), o7IxJCL=Q
new QuickSort(), gV&z2S~"
new ImprovedQuickSort(), \*=7#Vd
new MergeSort(), v<Bynd-
new ImprovedMergeSort(), SG6sw]x
new HeapSort() !i=nSqW
}; >0Q|nCx
cuOvN"nuNj
public static String toString(int algorithm){ v\(2&*
return name[algorithm-1]; oK 6(HF'&
} }fp-5
s-dLZ.9F
public static void sort(int[] data, int algorithm) { bWOS `5
impl[algorithm-1].sort(data); c-.t>r&
} @A)R_p
{Zp\^/
public static interface Sort { A*W)bZs.
public void sort(int[] data); |_uaS
} LjV]0%j?r
&=4(l|wcg
public static void swap(int[] data, int i, int j) { :;t #\%L/
int temp = data; 'M3">$N
data = data[j]; qKJSj
data[j] = temp; _~aG|mAj
} buk=p-oi
} nT#JOmv