[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; {gK i15t
} M/R#f9W
int i1=l; C x$|7J=O
int i2=mid+1; nmS3
for(int cur=l;cur<=r;cur++){ MCL5a@BX)
if(i1==mid+1) ykX}T6T
data[cur]=temp[i2++]; &[qLl
else if(i2>r) bWUo(B#*I
data[cur]=temp[i1++]; ]W-:-.prh
else if(temp[i1] data[cur]=temp[i1++]; Zpl?zI
else & UL(r
data[cur]=temp[i2++]; [ o3}K
} KuE 2a,E4
} 'UW7zL5
waO*CjxE:
} C37KvLQ
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改进后的归并排序: jD$T
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package org.rut.util.algorithm.support; v[35C]gS
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import org.rut.util.algorithm.SortUtil; 2+ >.Z.pX
4N*Fq!k~
/** l|U=(aA]h
* @author treeroot Gzc{2"p
* @since 2006-2-2 osPX%k!yw
* @version 1.0 )bw^!w)
*/ U#d&#",s
public class ImprovedMergeSort implements SortUtil.Sort { t<~riFs]
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private static final int THRESHOLD = 10; tezsoR!.ak
T~=NY,n
/* 2vu"PeU9
* (non-Javadoc) .2[>SI
* `!>zYcmT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :=UeYm @
*/ >L?/Ph%d
public void sort(int[] data) { K,?M5n '
int[] temp=new int[data.length]; mY#[D;mUe
mergeSort(data,temp,0,data.length-1); e=1&mO?
} L?4c8!Q
+%$!sp?
private void mergeSort(int[] data, int[] temp, int l, int r) { m"X0Owx
int i, j, k; P0k|33;7L
int mid = (l + r) / 2; uTBls8
if (l == r) a?M<r>
return; o^d(mJZ.F~
if ((mid - l) >= THRESHOLD) }g5h"N\$o
mergeSort(data, temp, l, mid); o24`5Jdh
else X.%Xi'H
insertSort(data, l, mid - l + 1); y3c]zDjV
if ((r - mid) > THRESHOLD) .oN<c]iqE
mergeSort(data, temp, mid + 1, r); .kBi" p&
else hTf]t
insertSort(data, mid + 1, r - mid); -"<H$
@C~TD)K
for (i = l; i <= mid; i++) { N[){yaj
temp = data; o/2\8
} LL#7oBJdM
for (j = 1; j <= r - mid; j++) { gO gZ
temp[r - j + 1] = data[j + mid]; X./8 PK?&
} %7/XZQ
int a = temp[l]; -`&4>\o2Lx
int b = temp[r]; ZQsE07
for (i = l, j = r, k = l; k <= r; k++) { xHZx5GJp9
if (a < b) { S-Ryt>G
data[k] = temp[i++]; vn6/H8
a = temp; 5i83(>p3]e
} else { 2W$c%~j$2
data[k] = temp[j--]; fw|r{#d
b = temp[j]; XDz![s
} {jJUS>
} Ep.,2H
} #xm<|s
Cdotl$'
/** D0us<9q
* @param data ^qy$M>
* @param l M!;H3*
* @param i 2RT9Q!BX{
*/ Pb+oV
private void insertSort(int[] data, int start, int len) { "7l p|0I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q'hMf?_
} *8kg6v%
} hy3[MOD$G
} Lk4&&5q
} rcOpOoU|
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堆排序： 'g|%Ro/
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package org.rut.util.algorithm.support; ;!Ojb
X+?*Tw!\
import org.rut.util.algorithm.SortUtil; B#B$w_z
J55K+
/** A WMR0I
* @author treeroot }sd-X`lZ
* @since 2006-2-2 <@A/`3_O)
* @version 1.0 L!3{ASIN0
*/ ^qIp+[/'
public class HeapSort implements SortUtil.Sort{ Op~sR^ez
`0=0IPVd
/* (non-Javadoc) o3]B/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &&M-5XD
*/ c zL[W2l
public void sort(int[] data) { jf$6{zO6j
MaxHeap h=new MaxHeap(); X>wB=z5PXK
h.init(data); slDxsb
for(int i=0;i h.remove(); \G#Qe*"'K
System.arraycopy(h.queue,1,data,0,data.length); #- z*c
} /FkLZm
(|bMtT?"x
private static class MaxHeap{ }rn}r4_a
?*9U d
void init(int[] data){ aVz<RS
this.queue=new int[data.length+1]; w4:n(.;HK
for(int i=0;i queue[++size]=data; [I4K`>|Z
fixUp(size); 4)]g=-3
} Olj]A]v}
} n&r-
e\%QHoi>u
private int size=0; (=QaAn,,R
7I&7YhFI
private int[] queue; {QM;%f
)>\J~{
public int get() { oZA|IF8U0
return queue[1]; A0V"5syY
} wkdd&Nw;
2t< dCw
public void remove() { f"k?Ix\ e
SortUtil.swap(queue,1,size--); lqF{Y<l
fixDown(1); o~NeS|a
} l(v$+
file://fixdown 0`h[|FYV
private void fixDown(int k) { KQJn\#>
int j; {l0;G)-
while ((j = k << 1) <= size) { P qagep d
if (j < size %26amp;%26amp; queue[j] j++; 69dFd!G\
if (queue[k]>queue[j]) file://不用交换 [{}9"zB$x0
break; h|!B;D
SortUtil.swap(queue,j,k); f8#WT$Ewy
k = j; 6!n"E@Bwu
} SR*%-JbA
} vk5pnCM^3
private void fixUp(int k) { /JEH%)
while (k > 1) { ojs&W]r0Z
int j = k >> 1; /quf'CV}
if (queue[j]>queue[k]) W ;P1T"*A
break; R`76Ae`R8
SortUtil.swap(queue,j,k); d;mQ=k 1
k = j; p? iJ'K
} j72cSRv
} N5}vy$t_P
1.p?P] .
} ~9kvC&/{[
htX'bA
} CBnD)1b\
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SortUtil： hX`WVVoF
fX[,yc;
package org.rut.util.algorithm; >, 234ab=d
)@]-bPnv
import org.rut.util.algorithm.support.BubbleSort; x3PeU_9
import org.rut.util.algorithm.support.HeapSort; :`:<JA3,
import org.rut.util.algorithm.support.ImprovedMergeSort; R>/M>*C
import org.rut.util.algorithm.support.ImprovedQuickSort; g"(N_sv?
import org.rut.util.algorithm.support.InsertSort; pcur6:8W!
import org.rut.util.algorithm.support.MergeSort; c*RZbE9k
import org.rut.util.algorithm.support.QuickSort; '8*gJ7]
import org.rut.util.algorithm.support.SelectionSort; $#]?\psf
import org.rut.util.algorithm.support.ShellSort; Qc[[@=S%
Yo| H`m,
/** IH\k_Yf#u
* @author treeroot iBp 71x65
* @since 2006-2-2 P^rSpS9
* @version 1.0 E0xUEAO
*/ L9Fx Lw41
public class SortUtil { "'t<R}t!A
public final static int INSERT = 1; p\+#`] Q7}
public final static int BUBBLE = 2; /D1Bf:'(
public final static int SELECTION = 3; gW/H#T,
public final static int SHELL = 4; ,=$yvZs4[]
public final static int QUICK = 5; _\@i&3hkx
public final static int IMPROVED_QUICK = 6; d2.n^Q"?3
public final static int MERGE = 7; :Jhx4/10
public final static int IMPROVED_MERGE = 8; k`oXo%
public final static int HEAP = 9; B|:{.U@ne
i$"FUC~'
public static void sort(int[] data) { &\<RVE
sort(data, IMPROVED_QUICK); B susXW$
} PO&xi9_
private static String[] name={ ?z:xQ*#X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VZAdc*X
}; "MoV*U2s,
"5{Yn!-:
private static Sort[] impl=new Sort[]{ LTzf&TZbx5
new InsertSort(), ^ / f*5k
new BubbleSort(), 2<ef&?ljk
new SelectionSort(), /R|"/B0
new ShellSort(), )z/j5tnvm
new QuickSort(), +S;8=lzuV
new ImprovedQuickSort(), s3J T1TX
new MergeSort(), h@{@OAu?
new ImprovedMergeSort(), a.%]5%O;t
new HeapSort() }Q\yem
}; WCR+ZXI?1
;Jx ^
public static String toString(int algorithm){ OR?8F5o?p
return name[algorithm-1]; ]\#RsVX
} ni~45WX3
{/QpEd>3+
public static void sort(int[] data, int algorithm) { ?a}eRA7
impl[algorithm-1].sort(data); xZ;';}&pj
} X\1D[n:
UwE^ij
public static interface Sort { B2845~\.
public void sort(int[] data); |I OTW=>
} Rx`0VQ
QO#ZQ~
public static void swap(int[] data, int i, int j) { l\$C)q6O
int temp = data; Y Nq<%i!>
data = data[j]; &v 5yo}s
data[j] = temp; y:2o-SJn
} q8kt_&Ij
} "hy#L 0\t