[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; #kQLHi3##
} c-a;nAR
int i1=l; %M05& <
int i2=mid+1; {|@N~c+
for(int cur=l;cur<=r;cur++){ hM`*-+Zb
if(i1==mid+1) 5{8,+ Z
data[cur]=temp[i2++]; <NMOs"NB
else if(i2>r) UgLJV2M6
data[cur]=temp[i1++]; mHC36ba
else if(temp[i1] data[cur]=temp[i1++]; _Hq)mF
else gr$H?|n l
data[cur]=temp[i2++]; RjX#pb
} #.\X%!
} N" oJ3-~
%] 7.E
} ^KFwO=I@PV
!^A t{[U
改进后的归并排序: R )e^H
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package org.rut.util.algorithm.support; CB?H`R pC.
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import org.rut.util.algorithm.SortUtil; y]f| U-f:~
px_%5^zRQ
/** BRMR> ~k(
* @author treeroot *r]#jY4qx
* @since 2006-2-2 ~wRozV
* @version 1.0 Z7R+'OC
*/ &,`P%a&k
public class ImprovedMergeSort implements SortUtil.Sort { Aaix? |XN
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private static final int THRESHOLD = 10; h%@#jvh?4
vweD{\b
/* n?A;'\cK
* (non-Javadoc) 6@ )bZ|
* R0mWVgoz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (tP^F)}e5
*/ u8@>ThPD
public void sort(int[] data) { -n'%MT=Cd
int[] temp=new int[data.length]; sQe>LNp,G
mergeSort(data,temp,0,data.length-1); 5=Y\d,SS"
} bpeWK&
/-ky'S9
private void mergeSort(int[] data, int[] temp, int l, int r) { bga2{<VF
int i, j, k; E^. =^bR
int mid = (l + r) / 2; m,]M_y\u
if (l == r) _&m
return; -vC?bumR%
if ((mid - l) >= THRESHOLD) l=JK+uZ
mergeSort(data, temp, l, mid); Zx]"2U#
else OC[(Eq
insertSort(data, l, mid - l + 1); v4Q8RE?
if ((r - mid) > THRESHOLD) yS-owtVCGF
mergeSort(data, temp, mid + 1, r); `_v|O{DC{
else ^UK6q2[
insertSort(data, mid + 1, r - mid); x_5H_! \#
sxLq'3(
for (i = l; i <= mid; i++) { !P0Oq)q
temp = data; ?wx|n_3<:
} 1cdM^k
for (j = 1; j <= r - mid; j++) { C,D~2G
temp[r - j + 1] = data[j + mid]; Z5o6RTi
} #yVY!+A
int a = temp[l]; izi=`;=D^
int b = temp[r]; `W8dayZt
for (i = l, j = r, k = l; k <= r; k++) { ABp/uJI)
if (a < b) { 5<ycF_
data[k] = temp[i++]; u|D_"q~+6
a = temp; A3N<;OOk
} else { AHhck?M^
data[k] = temp[j--]; 9_GR\\
b = temp[j]; DP9hvu/85
} YX_p3
} wy$9QN
} lH^[b[
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/** m.p{+_@M&
* @param data 8+1tys
* @param l 6l>$N?a
* @param i xGeRoW(X
*/ Y75,{1\l0
private void insertSort(int[] data, int start, int len) { RW|3d<Fj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \6xVIQ& 0
} v7/qJ9l
} e? fFh,a
} ~V"D|U;i +
} .~6p/fHX
DO$jX 4
堆排序： |L4K#
:- ydsR/
package org.rut.util.algorithm.support; _S#uxgL<
<gKT7ONtg
import org.rut.util.algorithm.SortUtil; b^\u P
Hs8c%C
/** |}\et ecB
* @author treeroot ,!3G
* @since 2006-2-2 >T4.mB7+>
* @version 1.0 :d-+Z%Y
*/ Nd*zSsVlq
public class HeapSort implements SortUtil.Sort{ M:qeqn+
,xrXby|R"
/* (non-Javadoc) P-VK=Y1q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 969*mcq'
*/ _*+ 7*vAL
public void sort(int[] data) { %@5f+5{i!z
MaxHeap h=new MaxHeap(); `Q*L!/K+
h.init(data); 'kK}9VKl
for(int i=0;i h.remove(); Y`3>i,S6\
System.arraycopy(h.queue,1,data,0,data.length); 'k#^Z
} ucyz>TL0
FMuM:%&J]
private static class MaxHeap{ {|6(_SM|
l=ZhHON
void init(int[] data){ Dm[4`p@IY\
this.queue=new int[data.length+1]; ]w(i,iJ
for(int i=0;i queue[++size]=data; A -G?@U
fixUp(size); ~w'M8(
} t+5JIQY>
} RJ1Q.o
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private int size=0; Mjrl KI}f/
*S_eYKSl
private int[] queue; Dg4?,{c9W
rm NqS+t
public int get() { pUWj,&t
return queue[1]; Zycu3%JI
} SqTO~zGC
:grJ}i-D
public void remove() { Ex~[Hk4ow
SortUtil.swap(queue,1,size--); u~6`9'Ms
fixDown(1); '@9h@,tc
} }.O2xZ;}]'
file://fixdown {b[8x
private void fixDown(int k) { 'QjX2ytgX
int j; # &o3[.)9
while ((j = k << 1) <= size) { Q uy5H
if (j < size %26amp;%26amp; queue[j] j++; Kgi%Nd
if (queue[k]>queue[j]) file://不用交换 RiF~-;v&
break; Pm6/sO
SortUtil.swap(queue,j,k); =u(. Y
k = j; EaG3:<>J
} ,Utp6X
} 67Z|=B!7
private void fixUp(int k) { . Yg)|/
while (k > 1) { >z1RCQWju
int j = k >> 1; RZ9vQ\X U)
if (queue[j]>queue[k]) 7E4=\vM
break; eZ y)>.6Z
SortUtil.swap(queue,j,k); ;OQ{
k = j; <SUjz}_Oa:
} l njaHol0
} 3HC aZ?Ry'
v&%GK5j7O
} ]FvN*@lG
? r=cLC
} )R+@vh#Q<$
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SortUtil： eP$0TDZ
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package org.rut.util.algorithm; _) 2fXG!
l=[<gPE
import org.rut.util.algorithm.support.BubbleSort; =9GL;z:R+
import org.rut.util.algorithm.support.HeapSort; 0Np}O=>
import org.rut.util.algorithm.support.ImprovedMergeSort; .G#S*L
import org.rut.util.algorithm.support.ImprovedQuickSort; iV[g.sP-
import org.rut.util.algorithm.support.InsertSort; d {a^
import org.rut.util.algorithm.support.MergeSort; FJgr=9>
import org.rut.util.algorithm.support.QuickSort; &Jv j@,>$d
import org.rut.util.algorithm.support.SelectionSort; wX" 6 S:
import org.rut.util.algorithm.support.ShellSort; 5zX;/n~
UHF.R>Ry
/** &aldnJ
* @author treeroot /pZLt)=P
* @since 2006-2-2 gX5I`mm
* @version 1.0 kehv85
*/ <7/_Vs)F0
public class SortUtil { xWD=",0+
public final static int INSERT = 1; wj9CL1Gx
public final static int BUBBLE = 2; qm&}^S
public final static int SELECTION = 3; gYfN?A*`_
public final static int SHELL = 4; v_"p)4&'
public final static int QUICK = 5; \zw0*;&U
public final static int IMPROVED_QUICK = 6; {3]g3mj
public final static int MERGE = 7; hWwh`Vw%
public final static int IMPROVED_MERGE = 8; 1+v&SU
public final static int HEAP = 9; *<#jr
Z!60n{T79c
public static void sort(int[] data) { Tk9u+;=6$
sort(data, IMPROVED_QUICK); >nkd U
} MQY^#N
private static String[] name={ L"A,7@:Vd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g8 ,V( ^
}; RyKsM.
V03U"eI="
private static Sort[] impl=new Sort[]{ ttuQ,SD
new InsertSort(), *g]q~\b/;
new BubbleSort(), b"t95qlL
new SelectionSort(), iXK.QktHw
new ShellSort(), ilEWxr;,
new QuickSort(), 3:7J@>
new ImprovedQuickSort(), -z./6dQ
new MergeSort(), o {Sc
new ImprovedMergeSort(), \:]Clvc
new HeapSort() VG^*?62
}; r5> FU>7'
oE[wOq+
public static String toString(int algorithm){ j<>E Fd
return name[algorithm-1]; #ok1qT9_
} A&rk5y;
O7%<(
public static void sort(int[] data, int algorithm) { I4:4)V?
impl[algorithm-1].sort(data); {v+,U}
} \:-#,( .V
S(eCG2gR
public static interface Sort { P7O$*
public void sort(int[] data); )1wC].RFYm
} 4eK!1|1
F0W4B
public static void swap(int[] data, int i, int j) { #\[h.4i
int temp = data; a,tzt ]>
data = data[j]; X@|'#%
data[j] = temp; 2%i_SX[
} G=/a>{
} a7s+l=