[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; p()xz
} bN@ l?w
int i1=l; NaCy@
int i2=mid+1; u<&m]]*
for(int cur=l;cur<=r;cur++){ H>@+om
if(i1==mid+1) .%QXzIa3F
data[cur]=temp[i2++]; CJI~_3+K
else if(i2>r) W@!S%Y9
data[cur]=temp[i1++]; ;9g2?-svw
else if(temp[i1] data[cur]=temp[i1++]; OZ!^ak
else L8 @1THY
data[cur]=temp[i2++]; 3f;>" P}
} " 2Dngw
} FxtI"g\0
-Y;3I00(
} VLN_w$iEq
Xn\jO>[Ef
改进后的归并排序: #R RRu2
:eLVC7'
package org.rut.util.algorithm.support; wec)Ctj+
lb1Xsgm{
import org.rut.util.algorithm.SortUtil; 2f_:v6
s"?3]P
/** sn>~O4"
* @author treeroot }:#P)8/v>%
* @since 2006-2-2 WMP,\=6k0
* @version 1.0 ,6W>can
*/ S 6,.FYH
public class ImprovedMergeSort implements SortUtil.Sort { B?o7e<l[
'A[dCc8O
private static final int THRESHOLD = 10; BFW&2
GvlS%
/* wH6aAV~1
* (non-Javadoc) A.w:h;7
* 5E_YEBO/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2dgd~
*/ !5?<% *
public void sort(int[] data) { *_g$MI
int[] temp=new int[data.length]; da~],MN
mergeSort(data,temp,0,data.length-1); 3{(/x1a,4
} ua `RJ
R_xRp&5
private void mergeSort(int[] data, int[] temp, int l, int r) { /|#fejPh
int i, j, k; HE_8(Ms;8
int mid = (l + r) / 2; Vs{|xG7WD
if (l == r) 5ms(Wd
return; G9vpt M
if ((mid - l) >= THRESHOLD) G9@0@2aY8
mergeSort(data, temp, l, mid); @AuO`I@p=
else ?b5^
insertSort(data, l, mid - l + 1); sFTy(A/
if ((r - mid) > THRESHOLD) ;IM}|2zuN
mergeSort(data, temp, mid + 1, r); RY*U"G0#w
else qb` \)X]9
insertSort(data, mid + 1, r - mid); f'3$9x
VgS_s k
for (i = l; i <= mid; i++) { rk)`\=No
temp = data; dcWD(-
} y$R_.KbO
for (j = 1; j <= r - mid; j++) { ##4HYQ%E
temp[r - j + 1] = data[j + mid]; t<?,F
} eGbGw
int a = temp[l]; |IUWF%~^$+
int b = temp[r]; U|j`e5)
for (i = l, j = r, k = l; k <= r; k++) { "8zDbdK
if (a < b) { ^L&iR0
data[k] = temp[i++]; , SnSW-P
a = temp; G;XxBA
} else { _2 osV[e
data[k] = temp[j--]; N=g"(%
b = temp[j]; SOvF[,+
} `n?DU;,
} R .2wqkY
} Ef13Q]9|
&UlWCOo8
/** CQDkFQq-dq
* @param data 1hNq8*|
* @param l *bpD`s @
* @param i 6/dI6C!
*/ Tkgs]q79
private void insertSort(int[] data, int start, int len) { d4z/5Oa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )TM4R)r%)9
} 3%=~)7cF
} zT?D<XW>1
} DrK{}uM
} y Fq&8 x<X
;@E$}*3[>V
堆排序： LvYB7<zk>
-!]ZMi9
package org.rut.util.algorithm.support; ?p8_AL'RS
>t_6B~x9
import org.rut.util.algorithm.SortUtil; 5rZ
t}tEvh
/** WQO) =n
* @author treeroot G9<X_
* @since 2006-2-2 /fV;^=:8c
* @version 1.0 ?#UO./"
*/ OprkR
public class HeapSort implements SortUtil.Sort{ OY@ %p}l
vd4ytC
/* (non-Javadoc) PXNh&N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WVvvI9
*/ 6<(.4a?
public void sort(int[] data) { fXQNHZ|4
MaxHeap h=new MaxHeap(); }U5yQ%N
h.init(data); W#3Q ^Z?
for(int i=0;i h.remove(); v^+Sh|z/
System.arraycopy(h.queue,1,data,0,data.length); "AGLVp.zT
} Bo%NFB;
q;)JISf.
private static class MaxHeap{ "OnGE$
-_eLf#3
void init(int[] data){ $5Ff1{
this.queue=new int[data.length+1]; ))'<_nD
for(int i=0;i queue[++size]=data; ~zNAbaC+>t
fixUp(size); XAL1|]S
} 0b(N^$js'
} K:30_l<
OX\F~+
private int size=0; ;q6Ki.D
"C0Q(dr/n
private int[] queue; GYUn6P
p,i[W.dy.'
public int get() { jPW#(3hoE
return queue[1]; d)f :)Ew
} "o}+Ciul
]}2ZttQ?
public void remove() { d <JM36j?
SortUtil.swap(queue,1,size--); 9j:"J` '
fixDown(1); < F+l
} C/6V9;U
file://fixdown :'*~uJrR
private void fixDown(int k) { 3y8G?LL/[7
int j; 9\JF`ff_
while ((j = k << 1) <= size) { r#]WI|
if (j < size %26amp;%26amp; queue[j] j++; (+y
if (queue[k]>queue[j]) file://不用交换 .z}~4BY
break; K~ehP[^
SortUtil.swap(queue,j,k); P;]F(in=
k = j; `(/w y
} s>n)B^64W
} Ng>h"H
private void fixUp(int k) { dQR-H7U
while (k > 1) { Qhcu>ra
int j = k >> 1; ?]Xpi3k
if (queue[j]>queue[k]) 2u*KM`fa`
break; rFYWs6
SortUtil.swap(queue,j,k); "y/?WQ>,3
k = j; PGV/ h
} qE3UO<FA
} %m$Sp47
?|B&M\}g
} a8Nh=^Py
_?0}<kQ&
} Ob&<]
u-G+ j)
SortUtil： bTs?!~q
yT9@!]^L
package org.rut.util.algorithm; Qtv&ijFC
i5?q,_
import org.rut.util.algorithm.support.BubbleSort; R>mmoG}MQ[
import org.rut.util.algorithm.support.HeapSort; h/hmlnOQl
import org.rut.util.algorithm.support.ImprovedMergeSort; [>5-$YOT
import org.rut.util.algorithm.support.ImprovedQuickSort; $F+ LDs
import org.rut.util.algorithm.support.InsertSort; |f_[\&<*
import org.rut.util.algorithm.support.MergeSort; A*P|e-&Q8
import org.rut.util.algorithm.support.QuickSort; t+T4-1 3a
import org.rut.util.algorithm.support.SelectionSort; dZ0vA\z|
import org.rut.util.algorithm.support.ShellSort; s 3f-7f<
O]Qd<%V'x
/** 3Xy-r=N.l
* @author treeroot DG ;_Vg
* @since 2006-2-2 /F'sb[
* @version 1.0 4s{~r
*/ (uZ&V7l
public class SortUtil { wLJ:\_Jaf
public final static int INSERT = 1; "J8vjr1/
public final static int BUBBLE = 2; 0Bi.6r
public final static int SELECTION = 3; MC:@U~}6
public final static int SHELL = 4; rJbf_]^
public final static int QUICK = 5; =\wxsL
public final static int IMPROVED_QUICK = 6; >!bJslWA
public final static int MERGE = 7; FOy|F-j
public final static int IMPROVED_MERGE = 8; >DZw
public final static int HEAP = 9; k:F9. j%*
kH7(@Pa
public static void sort(int[] data) { 3e;^/kf<9
sort(data, IMPROVED_QUICK); ]B3=lc"
} OGg>#vj,s
private static String[] name={ po Vx8oO8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bU:EqW\(^
}; -^h' >.
fnX`Q[b4\A
private static Sort[] impl=new Sort[]{ 6'G6<8>-
new InsertSort(), .|b$NM
new BubbleSort(), ZE=Sp=@)j
new SelectionSort(), l@+7:n4K0
new ShellSort(), JJ2_hVU
new QuickSort(), :hFIl0$,"3
new ImprovedQuickSort(), 4Vi`* !
new MergeSort(), 1A G<$d5U|
new ImprovedMergeSort(), $ig0j`
new HeapSort() D"rK(
}; T)TfB(
8xV9.4S
public static String toString(int algorithm){ $r8 ^0ZRr
return name[algorithm-1]; .e=:RkI,
} YS@ypzc/
Be=u&T:~
public static void sort(int[] data, int algorithm) { ^N;.cY
impl[algorithm-1].sort(data); dP<=BcH>f
} s ;oQS5Y
1o;J,dYu
public static interface Sort { xLWwYK
public void sort(int[] data); $oU*9}}Rn
} b TM{l.Aq3
%GA"GYL9'
public static void swap(int[] data, int i, int j) { evAMJ=
int temp = data; -Rd/Gx
data = data[j]; BJsz2t :0
data[j] = temp; W;L7SF g)
} C|).;V&
} 1&)?JZhg