[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; JVvs-bK5
} AVlhNIr
int i1=l; 4VJ-,Z
int i2=mid+1; D=j-!{zB
for(int cur=l;cur<=r;cur++){ BKCA<
if(i1==mid+1) I0D(F i
data[cur]=temp[i2++]; eI$oLl@
else if(i2>r) _mqL8ho
data[cur]=temp[i1++]; )B"jF>9)[
else if(temp[i1] data[cur]=temp[i1++]; ]sf7{lVT
else :%tU'w
data[cur]=temp[i2++]; |mxDjgq
} !JHL\M>A5
} XKj|f`
]#)()6)2v
} BTqS'NuT
ZCMw3]*
改进后的归并排序: w1EXh
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package org.rut.util.algorithm.support; lk/n}bx
!#], hok8X
import org.rut.util.algorithm.SortUtil; &N2N6&Ta/
;#g"(
/** U6glp@s
* @author treeroot kyR:[+je
* @since 2006-2-2 \FQRNj?'_
* @version 1.0 PS)4 I&;U
*/ pnl{&<$C%C
public class ImprovedMergeSort implements SortUtil.Sort { jwc)Lj}
k^3>Y%^1
private static final int THRESHOLD = 10; [A+ >^ {
D=q:*x
/* l: HTk4$0
* (non-Javadoc) p|X"@kuseO
* \:%(q/v"X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T,,WoPU8t
*/ Sq>dt[7
public void sort(int[] data) { DrKP%BnS
int[] temp=new int[data.length]; "%`1]Fr
mergeSort(data,temp,0,data.length-1); dU&a{$ku[
} K[I=6
F+YZE[h%
private void mergeSort(int[] data, int[] temp, int l, int r) { |^&b8
int i, j, k; =_.l8IYX$%
int mid = (l + r) / 2; dN$0OS`s[
if (l == r) e>} s;H,
return; .[]r}[lU
if ((mid - l) >= THRESHOLD) 0.`/X66;V
mergeSort(data, temp, l, mid); Z;ht
else Q- cFtu-w
insertSort(data, l, mid - l + 1); m|SUV
if ((r - mid) > THRESHOLD) Rvqq.I8aC
mergeSort(data, temp, mid + 1, r); RD!&LFz/}
else &jS>UsGh
insertSort(data, mid + 1, r - mid); z Xg3[orF
xT3BHnQ(
for (i = l; i <= mid; i++) { k :(SCHf
temp = data; ISYXH9V
} H[6:_**?o
for (j = 1; j <= r - mid; j++) { ]~Rho_mq#
temp[r - j + 1] = data[j + mid]; H*d9l2,KZS
} ]AINKUI0
int a = temp[l]; O*hDbM2QQw
int b = temp[r]; S]}nm
for (i = l, j = r, k = l; k <= r; k++) { %|s;C
if (a < b) { aB_F9;IR
data[k] = temp[i++]; EuZ<quwWg
a = temp; @:oXN]+ _
} else { Ot4 Z{mA
data[k] = temp[j--]; b)6D_Az7c
b = temp[j]; %R}qg6dL
} , Rk9N
} ax"+0L{
} 0z`a1 %U
0!4Ts3qn1
/** LK{*sHi$
* @param data sQYkQ81
* @param l a!zz6/q[
* @param i *z5.vtfu!
*/ .<->C?#
private void insertSort(int[] data, int start, int len) { 4X!/hI=jq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7BE>RE=)
} ux=w!y;}
} ]N~2 .h
} !O\82d1P
} 2i)^!c
bg!/%[ {M
堆排序： W,K;6TZhh
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package org.rut.util.algorithm.support; \Z?9{J
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import org.rut.util.algorithm.SortUtil; M92dZ1+6
tZ]?^_Y1
/** f/U`
* @author treeroot W\>fh&!)
* @since 2006-2-2 Cz9xZA{[M
* @version 1.0 ,kyJAju>
*/ $jjfC
public class HeapSort implements SortUtil.Sort{ p\Q5,eg
:N:yLd} &
/* (non-Javadoc) KN^=i5K+Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qEyyT[:
*/ Z_LFIz*c
public void sort(int[] data) { ^P[e1?SZG
MaxHeap h=new MaxHeap(); PIJr{6B/PA
h.init(data); K%,2=.
for(int i=0;i h.remove(); 4.k0<
System.arraycopy(h.queue,1,data,0,data.length); ?k+xSV
} [u =+3b
X1DF*wI
private static class MaxHeap{ &xU[E!2H%
ZJnYIK
void init(int[] data){ `"Jj1O@
this.queue=new int[data.length+1]; S-a]j;U
for(int i=0;i queue[++size]=data; `68@+|#
fixUp(size); .u)X3..J
} 2bv=N4ly
} x!?u^
f&=AA@jLv
private int size=0; XPavReGf
h&M{]E9=
private int[] queue; \S"isz
.r|tSfm6
public int get() { &pP;Neh;
return queue[1]; 034iK[ib"
} )\1@V+!E%
'50OgF'
public void remove() { K='z G*$l
SortUtil.swap(queue,1,size--); OyStqi
fixDown(1); )\1QJ$-M&
} KKb,d0T[
file://fixdown IY_iB*T3jt
private void fixDown(int k) { ]P9l jwR
int j; y;4OY
while ((j = k << 1) <= size) { 4(#'_jS
if (j < size %26amp;%26amp; queue[j] j++; 1NbG>E#Ol
if (queue[k]>queue[j]) file://不用交换 R6 y#S&]x
break; ^+*N%yr
SortUtil.swap(queue,j,k); 5 )A1\
k = j; fZ6MSAh
} |5X^u+_
} jSJqE_1
private void fixUp(int k) { y|jl[pyg)
while (k > 1) { [ZNtCnv
int j = k >> 1; FVMD>=k
if (queue[j]>queue[k]) /{EP*,/*
break; tl[Uw[
SortUtil.swap(queue,j,k); P:hBt\5B
k = j; U2ohHJ``
} [xbSYu,&
} {yBs7[Wn
$r^GE
} On8v//=&
"x#-sZ=
} C0sX gM
Vouvr<43o
SortUtil： 2VPdw@"~}
55G+;
package org.rut.util.algorithm; UZWioxsKr+
:W"~ {~#?
import org.rut.util.algorithm.support.BubbleSort; ?3/qz(bM
import org.rut.util.algorithm.support.HeapSort; Je';9(ZK
import org.rut.util.algorithm.support.ImprovedMergeSort; gl~ecc
import org.rut.util.algorithm.support.ImprovedQuickSort; bc7/V#W
import org.rut.util.algorithm.support.InsertSort; 3BzNi'
import org.rut.util.algorithm.support.MergeSort; !-g{[19\
import org.rut.util.algorithm.support.QuickSort; ]dF ,:8
import org.rut.util.algorithm.support.SelectionSort; 9G9t" {
import org.rut.util.algorithm.support.ShellSort; ?Lx24*5%
|{&{
/** d}OTO10
* @author treeroot ,xw#NG6
* @since 2006-2-2 dydc}n
* @version 1.0 .fn\]rUv
*/ !({}(!P .
public class SortUtil { a`wc\T^
public final static int INSERT = 1; FW;m\vu
public final static int BUBBLE = 2; , |0}<%
public final static int SELECTION = 3; .14~J6
public final static int SHELL = 4; #F:p-nOq
public final static int QUICK = 5; zp6C3RG(
public final static int IMPROVED_QUICK = 6; af6M,{F
public final static int MERGE = 7; |e=,oV"
public final static int IMPROVED_MERGE = 8; ay4 %
public final static int HEAP = 9; ]v?@g:iE
#./fY;:cj
public static void sort(int[] data) { -Sqz5lo
sort(data, IMPROVED_QUICK); Ah1]Y}sy
} M "ui0 ac
private static String[] name={ hz{`h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BfXgh'Z~
}; K> %Tq
0q^>ZF-@
private static Sort[] impl=new Sort[]{ x!hh"x
new InsertSort(), _PPy44r2
new BubbleSort(), 2"COP>
new SelectionSort(), MO[2~`,Q!
new ShellSort(), T!uM+6|Y
new QuickSort(), 6 [k\@&V-
new ImprovedQuickSort(), Jf@H/luW
new MergeSort(), n#mA/H;wV
new ImprovedMergeSort(), 87=&^.~`
new HeapSort() y$;/Vm_'
}; []D&bYpv
t1]K<>g
public static String toString(int algorithm){ md+nj{Ib
return name[algorithm-1]; 9/9j+5}+
} '_<{p3M
sXqz+z$*
public static void sort(int[] data, int algorithm) { bkRLC_/d
impl[algorithm-1].sort(data); n*o-Lo+Fe.
} f0!))/rSD
~cWAl,(B<F
public static interface Sort { %Celc#v
public void sort(int[] data); /pm]BC
} CMe 06^U
p}&#jE
public static void swap(int[] data, int i, int j) { "<6G6?sz
int temp = data; P)"noG_'i
data = data[j]; C^s^D:
data[j] = temp; {baq+
} =NpYFKmMhV
} FW.7'7G@n