[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; \f"?Tv-C'
} fI11dE9&?[
int i1=l; .fJ*c
int i2=mid+1; *]{=8zc2
for(int cur=l;cur<=r;cur++){ ]P*!'iYN(
if(i1==mid+1) FDq{M?6i
data[cur]=temp[i2++]; sx-F8:Qa
else if(i2>r) ahp1!=Z-=
data[cur]=temp[i1++]; FaWl,}]
else if(temp[i1] data[cur]=temp[i1++]; T}2:.Hk:N
else ^K*-G@B
data[cur]=temp[i2++]; rv?!y8\
} .&(8(C
} 2v\W1VF
(C~dkR?
} b"P&+c
5&qY3@I7l
改进后的归并排序: X2P``YFV{
;z0"Ox=7
package org.rut.util.algorithm.support; bs:QG1*.
(j=DD6fC
import org.rut.util.algorithm.SortUtil; &(0N.=R
X X&K=<,Ja
/** IQoH@l&Xk
* @author treeroot \^m.dIPdO
* @since 2006-2-2 ?'f^X$aS
* @version 1.0 Z^+a*^w~{
*/ e/P4mc)
public class ImprovedMergeSort implements SortUtil.Sort { FpC~1Nau
i;avwP<0
private static final int THRESHOLD = 10; ?w8pLE~E
kc|>Q7~{
/* wXcMt>3
* (non-Javadoc) {DS\!0T-X
* [>wzl"cHW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b_l.QKk
*/ {a@hRY_
public void sort(int[] data) { /evaTQPz
int[] temp=new int[data.length]; X,&xhSzg?
mergeSort(data,temp,0,data.length-1); VlV)$z_
} s8yCC#H"
Lv^a+'
private void mergeSort(int[] data, int[] temp, int l, int r) { tNYJQ
int i, j, k; -D;lS 6
int mid = (l + r) / 2; 7Qt2gf
if (l == r) RAdvIIQp:
return; ^xmZ|f-
if ((mid - l) >= THRESHOLD) CR.bMF}
mergeSort(data, temp, l, mid); a2[8wv1
else s7vPI
insertSort(data, l, mid - l + 1); |o|gP8
if ((r - mid) > THRESHOLD) 98jD"*W5
mergeSort(data, temp, mid + 1, r); (UXv,_"nU
else R&#[6 r(h
insertSort(data, mid + 1, r - mid); DqRLx85d1
exsQmbj* %
for (i = l; i <= mid; i++) { 4@= aa
temp = data; m&,bC)}
} .Dc28F~t
for (j = 1; j <= r - mid; j++) { t2Ip\>;9f
temp[r - j + 1] = data[j + mid]; (K<Z=a
} }FHw" {my
int a = temp[l]; 9=H}yiJz
int b = temp[r]; 5FZ47m ~{Z
for (i = l, j = r, k = l; k <= r; k++) { B<(Pd
if (a < b) { _w\Y{(k
data[k] = temp[i++]; 4,gol?a
a = temp; ,0BR-#
} else { Lf[G>0t&n
data[k] = temp[j--]; lt&$8jh
b = temp[j]; OTnu{<.a
} r[6#G2
} U.HoFf+HN
} .MzOLv
\nrgAC-b
/** $+A%ODv
* @param data qPL^zM+
* @param l (s5<
* @param i bl$+8!~
*/ '.=Wk^,Ua
private void insertSort(int[] data, int start, int len) { GU:r vS!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y;'VosTD
} )>-77\
} m(8jSGV
} := ]sq}IN
} R)sp
V"w`!
堆排序： (~q#\
;% /6Y~/
package org.rut.util.algorithm.support; c1pq]mz|z
MZ;"J82p
import org.rut.util.algorithm.SortUtil; Uuwq7oFub
>{phyByI
/** = 4BLc
* @author treeroot 7p P|
* @since 2006-2-2 w{_e"N
* @version 1.0 ~AEqfIx*^&
*/ [ c ~LY4:
public class HeapSort implements SortUtil.Sort{ VQ1?Db(_2
uAW*5 `[
/* (non-Javadoc) n@G:e-m{A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @4G.(zW
*/ }9L 40)8
public void sort(int[] data) { Paae-EmC
MaxHeap h=new MaxHeap(); ;FV~q{
h.init(data); -_y~rx >
for(int i=0;i h.remove(); g28S3 '2
System.arraycopy(h.queue,1,data,0,data.length); 9f@#SB_H
} ki[;ZmQqY
""25ay
private static class MaxHeap{ OvyB<r
XA&tTpfJE
void init(int[] data){ M!xm1-,[
this.queue=new int[data.length+1]; n4ds;N3Hd
for(int i=0;i queue[++size]=data; X";QA":
fixUp(size); ^yn[QWFO
} '0'"k2"vC
} "@c';".|
fl pXVtsQ
private int size=0; qB+:#Yrx/
q;1VF;<"vH
private int[] queue; G/LXUhuif
'U|MM;(
public int get() { >K_$[qP3
return queue[1]; NPB,q& Th
} ZaukMEq
R`I8Ud4=
public void remove() { #`N6<nb
SortUtil.swap(queue,1,size--); )rs|=M=Xk
fixDown(1); Q70**qm
} ,p[\fT($]
file://fixdown Ov~S2?E8
private void fixDown(int k) { 2;Y@3d:z
int j; ;qT!fuN;
while ((j = k << 1) <= size) { .J<qfQ
if (j < size %26amp;%26amp; queue[j] j++; 1OiZNuI:E
if (queue[k]>queue[j]) file://不用交换 )CwMR'LV
break; [T.(MbP
SortUtil.swap(queue,j,k); gJcXdv=]2
k = j; ])$."g
} !SO$k%b}!
} /QV. U.>G
private void fixUp(int k) { V:0uy>
while (k > 1) { = h<? /Krs
int j = k >> 1; FkJ>]k
if (queue[j]>queue[k]) ^?K?\
break; 6'No4[F 4n
SortUtil.swap(queue,j,k); }(g+:]p-
k = j; Pw^c2TQ
} [FAOp@7W
} }]39 iK`w
R>e3@DQ~
} cmr6,3_
p~d)2TC4#
} y-)+I<M
-u3SsU)_%N
SortUtil： ~*cY& 9
D|Ihe%w-
package org.rut.util.algorithm; T^(n+lv
iRj x];:Vu
import org.rut.util.algorithm.support.BubbleSort; =-Q
import org.rut.util.algorithm.support.HeapSort; TgQ|T57
import org.rut.util.algorithm.support.ImprovedMergeSort; :AqnWy
import org.rut.util.algorithm.support.ImprovedQuickSort; 8@LykJbP
import org.rut.util.algorithm.support.InsertSort; *09\\ G
import org.rut.util.algorithm.support.MergeSort; UTK.tg
import org.rut.util.algorithm.support.QuickSort; tN'- qdm
import org.rut.util.algorithm.support.SelectionSort; tEWj}rX
import org.rut.util.algorithm.support.ShellSort; !irX[,e
&;@b&p+
/** $Op/5j
* @author treeroot wkZ2Y-#='
* @since 2006-2-2 4G;`KqR@
* @version 1.0 QhE("}1
*/ TNyY60E
public class SortUtil { 48&KdbGX
public final static int INSERT = 1; MlC-Aad(
public final static int BUBBLE = 2; l&^[cR
public final static int SELECTION = 3; Uwm[q+sTp
public final static int SHELL = 4; h'YcNkM 2>
public final static int QUICK = 5; 73sAZa|
public final static int IMPROVED_QUICK = 6; h&)vdCCk
public final static int MERGE = 7; {R{%Z
public final static int IMPROVED_MERGE = 8; GLKN<2|2@y
public final static int HEAP = 9; ubCJZ"!
$evuPm8G
public static void sort(int[] data) { P2:Q+j:PX
sort(data, IMPROVED_QUICK); n,Mw# r?y
} Q-dHR i
private static String[] name={ eUw;!Du
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OB i!fLa
}; f+*2K^B
08jUVHdt
private static Sort[] impl=new Sort[]{ ?L#SnnE
new InsertSort(), W4rw;(\
new BubbleSort(), (_n8$3T75
new SelectionSort(), JK8@J9(#
new ShellSort(), K~ /V
new QuickSort(), U#1yl6e\I
new ImprovedQuickSort(), zUgkY`]:BJ
new MergeSort(), z?_}+
new ImprovedMergeSort(), e4W];7_K!
new HeapSort() xo 'w+Av
}; |b;M5w?
m}'@S+k^
public static String toString(int algorithm){ v*]Xur6e}
return name[algorithm-1]; |v'5*n9
} Gc!{%x
BHE =Zo
public static void sort(int[] data, int algorithm) { F5Q. Vh
impl[algorithm-1].sort(data); yhn $4;m
} ~u`! Gi
.&Gtw _
public static interface Sort { L8K3&[l%
public void sort(int[] data); 0|Ft0y`+
} ^A<.s_
-Izg&u &
public static void swap(int[] data, int i, int j) { d@4=XSj
int temp = data; 4_:e+ ql
data = data[j]; N)y;owgo
data[j] = temp; r$eL-jQmn
} k#+^=F^)I
} 5h^qtK