[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; 3KLUH=)P
} z*Sm5i&)_q
int i1=l; b^Hrzn
int i2=mid+1; idmU.`
for(int cur=l;cur<=r;cur++){ QbU5FPiN
if(i1==mid+1) B( [x8A]
data[cur]=temp[i2++]; eh#37*-
else if(i2>r) yIw}n67
data[cur]=temp[i1++]; ^}3^|jF
else if(temp[i1] data[cur]=temp[i1++]; <QtZ6-;_f
else fF:57*ys
data[cur]=temp[i2++]; BT{;^Hp
} J=V
} gmTBT#{6yH
\}-4(Xdaq
} y)f.ON36I
!`ol&QQ#
改进后的归并排序: 1I Yip\:lS
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package org.rut.util.algorithm.support; ^<]'?4m]
[^>XRBSm
import org.rut.util.algorithm.SortUtil; a"~o'W7
_8K+iqMZG
/** z,HhSW?&^
* @author treeroot }v(wjD
* @since 2006-2-2 6*8Wtq
* @version 1.0 vr!J3H f
*/ 91 jRIB
public class ImprovedMergeSort implements SortUtil.Sort { Xo^8o0xi
AXfU$~
private static final int THRESHOLD = 10; 8(3(kZxS
iT@`dEZ.
/* >WLPE6E
* (non-Javadoc) r)(5,*v
* P-m_],
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dQut8>0&
*/ !U`&a=k
public void sort(int[] data) { {N(qS'N
int[] temp=new int[data.length]; zVhyAf
mergeSort(data,temp,0,data.length-1); _ %s#Cb
} jiI=tg;
G1:}{a5i_
private void mergeSort(int[] data, int[] temp, int l, int r) { ` Xc7b
int i, j, k; gv!8' DKn
int mid = (l + r) / 2; -15e
if (l == r) !3Dq)ebBz
return; o7y<Zd`Bj
if ((mid - l) >= THRESHOLD) J?4{#p
mergeSort(data, temp, l, mid); H7O~So*N5
else MB}nn&u#
insertSort(data, l, mid - l + 1); M!mL/*G@YE
if ((r - mid) > THRESHOLD) Q G)s
mergeSort(data, temp, mid + 1, r); j:9M${~
else HKN|pO3v
insertSort(data, mid + 1, r - mid); %V_ XY+o
dQX-s=XJ
for (i = l; i <= mid; i++) { D{9a'0J
temp = data; egmUUuO
} zcpL[@B
for (j = 1; j <= r - mid; j++) { dg D-"-O
temp[r - j + 1] = data[j + mid]; mY|c7}>V;
} sA0Ho6
int a = temp[l]; zI88IM7/
int b = temp[r]; ! FcGa
for (i = l, j = r, k = l; k <= r; k++) { l9p 6I
if (a < b) { ^0,}y]5p
data[k] = temp[i++]; aRd~T6I
a = temp; 6]4~]!
} else { +cpb!YEAb
data[k] = temp[j--]; 1nVQYqT_
b = temp[j]; 2g(_Kdj*{
} #%,X),%-
} ^`H'LD
} $e^"Inhtqp
q|5WHB
/** a=S &r1s>
* @param data Z'o0::k
* @param l 31n"w;
* @param i vE]ge
*/ %$BRQ-O
private void insertSort(int[] data, int start, int len) { !&)X5oJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); " <bjS
} ]+lT*6P*
} hzD)yf
} a%go[_w
} B'/U#>/
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堆排序： 4+olyBht
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package org.rut.util.algorithm.support; 8X;?fjl`"
!~^2Mu(X
import org.rut.util.algorithm.SortUtil; g|)>65v
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/** "|\hTRQ
* @author treeroot +U fw
* @since 2006-2-2 UMcM&yu-
* @version 1.0 3s\UU2yr
*/ s>9I#_4]
public class HeapSort implements SortUtil.Sort{ Vjs2Yenx
%<i sdvF
/* (non-Javadoc) b:1B >
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2%/F`_XbP
*/ O:]']' /
public void sort(int[] data) { 1N/4W6
MaxHeap h=new MaxHeap(); <Qq {&,Le
h.init(data); TtJX(N~
for(int i=0;i h.remove(); ]36SF5<0r
System.arraycopy(h.queue,1,data,0,data.length); ?Ld),A/c
} ~B<\#oO
eDd&vf
private static class MaxHeap{ #y\O+\4e
&Vj@){
void init(int[] data){ }$?FR
this.queue=new int[data.length+1]; Uo3
for(int i=0;i queue[++size]=data; >iyNZ]."\
fixUp(size); ``xm##K
} ?[Yn<|
} |:)Bo<8
W83d$4\d
private int size=0; )St0}?I~
p{?duq=
private int[] queue; fb f&bJT
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public int get() { Z@Rqm:e
return queue[1]; /X8a3Eqp9
} mtUiO p
[_N1 .}e
public void remove() { LM<*VhX
SortUtil.swap(queue,1,size--); V7$ m.P#uM
fixDown(1); Yjg$o:M
} cfmwz~S6i
file://fixdown jLFaf#G]
private void fixDown(int k) { 8YSvBy
int j; `!8\|/
while ((j = k << 1) <= size) { |\bNFnn(
if (j < size %26amp;%26amp; queue[j] j++; c coi
if (queue[k]>queue[j]) file://不用交换 ~HY)$Yp;
break; e_-g|ukC
SortUtil.swap(queue,j,k); ]W3u~T*
k = j; df{?E):
} n%r>W^2j
} e"@r[pq-{u
private void fixUp(int k) { Z%#e* O0
while (k > 1) { AB $N`+&
int j = k >> 1; mmQC9nZ
if (queue[j]>queue[k]) tFcQ.1
break; ( w4XqVT
SortUtil.swap(queue,j,k); m.P F'_)/
k = j; [,bJKz)a
} II^Rp],>
} 'q}Ud10c
Y1o[|ytW
} QXI~Toddj
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} 5ncW s)
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SortUtil： D[W` q#W
JKKp5~_~
package org.rut.util.algorithm; \Vv)(/q{
H:b"Vd"x9
import org.rut.util.algorithm.support.BubbleSort; fe\'N4
import org.rut.util.algorithm.support.HeapSort; 8y<mHJ[B
import org.rut.util.algorithm.support.ImprovedMergeSort; I'D3~UIf
import org.rut.util.algorithm.support.ImprovedQuickSort; .(&6gB
import org.rut.util.algorithm.support.InsertSort; mAH7;u<
import org.rut.util.algorithm.support.MergeSort; 9f['TG,"
import org.rut.util.algorithm.support.QuickSort; v~RxtTu
import org.rut.util.algorithm.support.SelectionSort; u!xgLf'`
import org.rut.util.algorithm.support.ShellSort; :qS~"@?<
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/** !/`AM<`o
* @author treeroot r E1ouz!D
* @since 2006-2-2 '"Cqq{*
* @version 1.0 ks$5$,^T2o
*/ <F`9;WX
public class SortUtil { :WH{wm|
public final static int INSERT = 1; HF*~bL
public final static int BUBBLE = 2; )fXxkOd
public final static int SELECTION = 3; 5hqXMs
public final static int SHELL = 4; ko.%@Y(=
public final static int QUICK = 5; z:UkMn[
public final static int IMPROVED_QUICK = 6; 0gyvRM@ x[
public final static int MERGE = 7; D}%VZA}].
public final static int IMPROVED_MERGE = 8; FoIK, MdJ
public final static int HEAP = 9; =}ZY`O*/
-X*.scw
public static void sort(int[] data) { !'\(OFv9Im
sort(data, IMPROVED_QUICK); r:xg#&"*
} [3irr0D7l
private static String[] name={ Jv(E'"H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5i$P$ R
}; x8z6 <
JAW7Y:XB
private static Sort[] impl=new Sort[]{ Z$0mKw
new InsertSort(), HH*,Oe
new BubbleSort(), XffHF^l9F
new SelectionSort(), ;[zZI~wh
new ShellSort(), B8cg[;e81
new QuickSort(), qPN
new ImprovedQuickSort(), GDj_+G;tO\
new MergeSort(), yyPj!<.MGP
new ImprovedMergeSort(), p-C{$5& O1
new HeapSort() ILNghtm-
}; aorL,l
xR'd}>`
public static String toString(int algorithm){ -Hi_g@i*XW
return name[algorithm-1]; KJn 3&7
} aSm</@tO&
yokZ>+jb
public static void sort(int[] data, int algorithm) { \#h=pz+jb
impl[algorithm-1].sort(data); Jx3a7CpX
} 7DW-brd
)W@
public static interface Sort { 4P2p|Gc3
public void sort(int[] data); ),<h6$
} "{{@N4^
PVKq&Q?
public static void swap(int[] data, int i, int j) { 8=\k<X{`
int temp = data; <!u(_Bxw/
data = data[j]; cP21x<n
data[j] = temp; 9Up>e
} Rlr[uU_
} Yv*i69"