[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; Hn-k*Y/P
} 8hKyp5(%l
int i1=l; 9XH}/FcP_O
int i2=mid+1; 82EH'C
for(int cur=l;cur<=r;cur++){ l]bCt b%_
if(i1==mid+1) shn{]Y
data[cur]=temp[i2++]; @TvoCDeI
else if(i2>r) 8[z<gxP`?
data[cur]=temp[i1++]; K}r@O"6*\
else if(temp[i1] data[cur]=temp[i1++]; |i}5vT78
else _ ?\4k{ET
data[cur]=temp[i2++]; O%>FKU>(?
} R*DQm
} 3U_,4qf
c`F~vrr)X
} *c0\<BI
i uNBw]
改进后的归并排序: tn"n~;Bh?:
Hq>"rrVhx
package org.rut.util.algorithm.support; H.n+CR
}Q=@$YIesD
import org.rut.util.algorithm.SortUtil; 0Rme}&$
uoryxKRjc~
/** ?HsQ417.H
* @author treeroot ]]InD N
* @since 2006-2-2 7AOjlC9R}
* @version 1.0 2I!L+j_
*/ K F:W:8
public class ImprovedMergeSort implements SortUtil.Sort { Qd{h3K^hlu
TB8a#bK4
private static final int THRESHOLD = 10; Q9[$8
.5t|FJ]`$
/* tH}$j
* (non-Javadoc) _:ORu Vk
* 5UTIGla
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o:.6{+|N
*/ 7[b]%i
public void sort(int[] data) { -UhSy>m
int[] temp=new int[data.length]; KBb{Z;%
mergeSort(data,temp,0,data.length-1); %+1;iuDL
} _w'N&#
_(TYR*
private void mergeSort(int[] data, int[] temp, int l, int r) { SviGLv;oR
int i, j, k; #nzVgV]
int mid = (l + r) / 2; <+/:}S4w)
if (l == r) TqZ&X|G
return; DaK2P;WP
if ((mid - l) >= THRESHOLD) PCx] >&
mergeSort(data, temp, l, mid); |, Lp1
else a9w1Z4
insertSort(data, l, mid - l + 1); w<4,;FFlZ/
if ((r - mid) > THRESHOLD) Gx$rk<;ZW
mergeSort(data, temp, mid + 1, r); oD0N<Ln}
else ?eU=xO
insertSort(data, mid + 1, r - mid); gmU0/z3&
Gp PlO]
for (i = l; i <= mid; i++) { {e3XmVAI
temp = data; ]t23qA@^2
} 2&k5X-Y
for (j = 1; j <= r - mid; j++) { ~I_v {
temp[r - j + 1] = data[j + mid]; _i-(`5
} IIrXI8'}
int a = temp[l]; '/h~O@Rw
int b = temp[r]; S>'S4MJE`
for (i = l, j = r, k = l; k <= r; k++) { _kJ?mTk
if (a < b) { p?#cn
data[k] = temp[i++]; fFBD5q(n
a = temp; c'678!r9 P
} else { Za&.sg3RG
data[k] = temp[j--]; us:V\V
b = temp[j]; jW?siQO^
} L'*P;z7<
} l$:.bwXXO
} h /.^iT
B!#F!Wk"
/** X`,]@c%C`
* @param data i;yr=S,a0/
* @param l "(U%Vg|)
* @param i !aVwmd'9
*/ l5 FM>q
private void insertSort(int[] data, int start, int len) { Je5UVf3>2&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `!K!+`Z9
} #4iiY6
} #]BpTpRAe<
} c T[.T#I
} yD0,q%B`}
8" x+^
堆排序： HifU65"8
=36e&z-#
package org.rut.util.algorithm.support; upJ|`,G{
:N3'$M"
import org.rut.util.algorithm.SortUtil; /!u#S9_B
Q]?Lg
/** v7L}I[f
* @author treeroot K~?M?sa
* @since 2006-2-2 Tt0:rQ.
* @version 1.0 |&>!"27;w
*/ D>YbL0K>X~
public class HeapSort implements SortUtil.Sort{ jMT];%$[
X1P_IB
/* (non-Javadoc) (IrX\Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e>ZF? (a0
*/ h,D6MP
public void sort(int[] data) { E2PMcT{)_
MaxHeap h=new MaxHeap(); rQ4i%.
h.init(data); y[}O(
for(int i=0;i h.remove(); SSS)bv8m
System.arraycopy(h.queue,1,data,0,data.length); Fe4QWB6\U
} >/kwy2
7=o2$
private static class MaxHeap{ 4/Vy@h"A3
hKT]M[Pv
void init(int[] data){ N'#Lb0`B
this.queue=new int[data.length+1]; CD]2a@j{
for(int i=0;i queue[++size]=data; =h083|y>
fixUp(size); 'pUJlPGx
} 6iozb~!Rr
} BBub'
Qe~2'Hw#9
private int size=0; owA0I'|V-A
{GaQV-t
private int[] queue; $rZ:$d.C
4zF|}aiQ
public int get() { Wgh4DhAW
return queue[1]; lZ3o3"
} <z>K{:+>
.?TPoqs7Z
public void remove() { "dKYJ&$
SortUtil.swap(queue,1,size--); $J~~.PUXQ
fixDown(1); +Oae3VFf;
} >gt_C'
file://fixdown XZcT-w7
private void fixDown(int k) { xr2ew%&o
int j; n&. bs7N2
while ((j = k << 1) <= size) { T4W"!4[
if (j < size %26amp;%26amp; queue[j] j++; 3wS{@'
if (queue[k]>queue[j]) file://不用交换 ! Z e
break; S;o U'KOY
SortUtil.swap(queue,j,k); )$#r6fQO
k = j; dh7PpuN{
} !U,^+"l'GP
} -jZP&8dPH
private void fixUp(int k) { /nK)esB1L
while (k > 1) { bw@DcT&,
int j = k >> 1; qM`XF32A$
if (queue[j]>queue[k]) _{EO9s2FG
break; ez2 gy"
SortUtil.swap(queue,j,k); nP9@yI*7
k = j; (1bz.N8z
} `.# l_-U{
} Oc;/'d2
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} pai>6p
CS 7"mE`{
} s*gyk
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SortUtil： lR!Sdd} -
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package org.rut.util.algorithm; CfMq?.4%E}
&FWPb#
import org.rut.util.algorithm.support.BubbleSort; _v=@MOI/J
import org.rut.util.algorithm.support.HeapSort; ]Q\Ogfjp
import org.rut.util.algorithm.support.ImprovedMergeSort; D_6GzgZ
import org.rut.util.algorithm.support.ImprovedQuickSort; :x*8*@kC
import org.rut.util.algorithm.support.InsertSort; Co2* -[R
import org.rut.util.algorithm.support.MergeSort; n2bL-
import org.rut.util.algorithm.support.QuickSort; mm3goIi;Y
import org.rut.util.algorithm.support.SelectionSort; n6gYZd
import org.rut.util.algorithm.support.ShellSort; S7Xr~5>X
J&{qe@^
/** vqLC?{i+
* @author treeroot d[.kGytUt
* @since 2006-2-2 2`#jw)dM;}
* @version 1.0 $'f<4
*/ bQ-5uFe~$B
public class SortUtil { }b9#.H9
public final static int INSERT = 1; YyX/:1 sg>
public final static int BUBBLE = 2; %h**L'~``
public final static int SELECTION = 3; H|='|k5Y.
public final static int SHELL = 4; 28[dTsd%
public final static int QUICK = 5; 29"eu#-Qj
public final static int IMPROVED_QUICK = 6; 6 ^X$;
public final static int MERGE = 7; khl(9R4a
public final static int IMPROVED_MERGE = 8; /Yk2 |L
public final static int HEAP = 9; Kp*nOZ
(o_fY.
public static void sort(int[] data) { %/dYSC
sort(data, IMPROVED_QUICK); P'#m1ntxQ
} fGiN`j}j
private static String[] name={ K!?T7/@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }DTpl?l
}; 0(s0<9s%
d\`A ^
private static Sort[] impl=new Sort[]{ 0lNVQxG
new InsertSort(), 7z \I\8
new BubbleSort(), #&.&Uu$
new SelectionSort(), d:0RDK-}s
new ShellSort(), AElx #`T
new QuickSort(), [L1pDICoy
new ImprovedQuickSort(), >n@?F[Y
new MergeSort(), oK h#th
new ImprovedMergeSort(), 7?K?-Oj
new HeapSort() 5y! 4ny_
}; \4wM8j
sk~rjH]-g$
public static String toString(int algorithm){ l=5(5\
return name[algorithm-1]; m?-3j65z
} 05:`(vl
A~Eu_m
public static void sort(int[] data, int algorithm) { c/ wzV
impl[algorithm-1].sort(data); >Dpz0v
} A)En25,X
>_U)=q
public static interface Sort { GzK{.xf
public void sort(int[] data); PY: l
} "U34D1I)#
}N5>^y
public static void swap(int[] data, int i, int j) { 4NL TtK
int temp = data; "GP!]3t
data = data[j]; irCS}Dbw
data[j] = temp; euM7> $`
} m~~_iz_*
} XOO!jnQu