[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; bT6VxbNS
} u0]u"T&N!
int i1=l; 3IJ0 P.x!o
int i2=mid+1; @lq)L
for(int cur=l;cur<=r;cur++){ A;^ iy]"
if(i1==mid+1) cU-A1W
data[cur]=temp[i2++]; NMQG[py!f
else if(i2>r) r \[|'hA
data[cur]=temp[i1++]; I:HrBhI)wP
else if(temp[i1] data[cur]=temp[i1++]; 4AKr.a0q
else =j{tFxJ
data[cur]=temp[i2++]; 4l{$dtKbI
} )&O6d .
} Mna yiJl
c%WO#}r|
} MN8>I=p
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改进后的归并排序: & Zn`2%
SQhVdYU1'
package org.rut.util.algorithm.support; *u:,@io7'G
}#-@5["-X
import org.rut.util.algorithm.SortUtil; S>>wf:\ c
wdAKU+tM
/** }O>4XFj
* @author treeroot 4lWqQVx
* @since 2006-2-2 VdGVEDwz
* @version 1.0 K a& 2>F
*/ PO8Z2"WI
public class ImprovedMergeSort implements SortUtil.Sort { #0vda'q=j
; o Y|~
private static final int THRESHOLD = 10; |d&C<O;f
,vO\n^
/* 7#d:TXS
* (non-Javadoc) wJ pb$;
* @HiGc^X(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wViTMlq
*/ M.6uWwzQR
public void sort(int[] data) { -KV,l
int[] temp=new int[data.length]; @0s' (
mergeSort(data,temp,0,data.length-1); _"Z?O)d*
} NuSdN>8ll
LT Pr8^
private void mergeSort(int[] data, int[] temp, int l, int r) { Ws7fWK;
int i, j, k; m[^)Q9o}
int mid = (l + r) / 2; .d}yQ#5z
if (l == r) 4sntSlz)~k
return; b_ak@LYiu
if ((mid - l) >= THRESHOLD) 6r`N\ :18
mergeSort(data, temp, l, mid); RRPPojKZ
else B`<}YVA
insertSort(data, l, mid - l + 1); 3cgq'ob
if ((r - mid) > THRESHOLD) uS,?oS
mergeSort(data, temp, mid + 1, r); )c&ya|h
else 6)ibXbH
insertSort(data, mid + 1, r - mid); 6u#eLs
1U#W=Fg'
for (i = l; i <= mid; i++) { _B#x{ii
temp = data; `kxC# &HO
} l?2
for (j = 1; j <= r - mid; j++) { i+qg*o$
temp[r - j + 1] = data[j + mid]; ;4ybkOD
} bL`\l!qQx;
int a = temp[l]; Exqz$'(W9
int b = temp[r]; 7%EIn9P
for (i = l, j = r, k = l; k <= r; k++) { ZzNHEV
if (a < b) { M9A1 8d|
data[k] = temp[i++]; zn 0y`9!n?
a = temp; ]7cciob
} else { .%{B=_7
data[k] = temp[j--]; Y,v9o
b = temp[j]; B)[RIs
} vD9\i*\2
} =oIt.`rf
} :d9GkC
;M0`8MD
/** JZ`SV}\`
* @param data f.uuXK
* @param l wkGr}
* @param i Iy49o!
*/ %6 Av1cv
private void insertSort(int[] data, int start, int len) { s|H7;.3gp
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Pe,ky>ow
} TK18U*z7J
} kJJiDDL0;*
} L=qhb;[L
} -k7b# +T
i_Q1\_m!
堆排序： s7sd(f]=
&hkD"GGe
package org.rut.util.algorithm.support; .tLRY
v~Dobk/n
import org.rut.util.algorithm.SortUtil; F?R6zvive
8)eRm{
/** U ->vk{v
* @author treeroot APF`b
* @since 2006-2-2 8v2Wi.4T
* @version 1.0 d;p3cW"
*/ H @k}
public class HeapSort implements SortUtil.Sort{ ]:D&kTc
.<>t2,Af
/* (non-Javadoc) ;"Qq/knVL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~y"R{-%uS
*/ ?]Hs~n-
public void sort(int[] data) { (^FMm1@T
MaxHeap h=new MaxHeap(); 9)]`le
h.init(data); kVM*[<k
for(int i=0;i h.remove(); ~&p]kmwXSX
System.arraycopy(h.queue,1,data,0,data.length); q6$6:L,<
} d+v|&yN
TM{m:I:Z*n
private static class MaxHeap{ JS8pN5
5]]QW3
void init(int[] data){ 4y+hr
this.queue=new int[data.length+1]; SaF0JPm4z
for(int i=0;i queue[++size]=data; _ps4-<ugC
fixUp(size); Zy3F%]V0
} `Zo5!"'
} jrN 5l1np
*(q{k%/M
private int size=0; 5OGwOZAj52
hs;|,r
private int[] queue; d7b`X<=@s
NiVLx_<Pr'
public int get() { X%-hTl
return queue[1]; CPNV\qCY
} \R@}X cqZ
p+b9D
public void remove() { ,Aq, f$5V
SortUtil.swap(queue,1,size--); C$])q`9
fixDown(1); 7mi*#X}
} T<7}IH$6xE
file://fixdown Pfvb?Hy
private void fixDown(int k) { uv$5MwKU
int j; $aTo9{M^
while ((j = k << 1) <= size) { {)r[?%FMgV
if (j < size %26amp;%26amp; queue[j] j++; KS~Q[-F1P
if (queue[k]>queue[j]) file://不用交换 &f'Lll
break; hOLlZP+
SortUtil.swap(queue,j,k); l>`S<rGe
k = j; 8b,Z)"(U3
} >^9j>< Z
} iWW!'u$+I`
private void fixUp(int k) { u SZfim@Z7
while (k > 1) { i`CNgScF>
int j = k >> 1; N|>MqH,Bt
if (queue[j]>queue[k]) <LBCu;
break; 5ip ZdQ^
SortUtil.swap(queue,j,k); Bt:M^b^
k = j; rM~Mqpk
} UVi9}zr
} X%*BiI
fvTp9T\f3
} ~rOvVi&4
]nIVP
} T`v
hZ<FCY,/?
SortUtil： %:l\Vhhz
r H9}VA:h
package org.rut.util.algorithm; K~UT@,CS60
?j!/Hc/b4
import org.rut.util.algorithm.support.BubbleSort; !JDyv\i}
import org.rut.util.algorithm.support.HeapSort; I %1P:-
import org.rut.util.algorithm.support.ImprovedMergeSort; 96F+I!qC
import org.rut.util.algorithm.support.ImprovedQuickSort; ^JIs:\g<<
import org.rut.util.algorithm.support.InsertSort; QB*AQ5-
import org.rut.util.algorithm.support.MergeSort; dXt@x8E
import org.rut.util.algorithm.support.QuickSort; z9AX8k(B6
import org.rut.util.algorithm.support.SelectionSort; E0r#xmk
import org.rut.util.algorithm.support.ShellSort; :]\-GJV5
ezJ^ r,D|
/** #c<F,` gdi
* @author treeroot 9WoTo ,q
* @since 2006-2-2 J{uqbrJICr
* @version 1.0 "el3mloR8
*/ %kBrxf
public class SortUtil { +@Kq
public final static int INSERT = 1; 0#ePg6n
public final static int BUBBLE = 2; Tt0]G_
public final static int SELECTION = 3; r)qow.+&
public final static int SHELL = 4; = p2AK\
public final static int QUICK = 5; 'OYnLz`"6
public final static int IMPROVED_QUICK = 6; y3'K+?4
public final static int MERGE = 7; A:sP%c;
public final static int IMPROVED_MERGE = 8; v'y<}U
public final static int HEAP = 9; H0lAu]~R_W
7&|&y SCu
public static void sort(int[] data) { d5LL( "
sort(data, IMPROVED_QUICK); [DSzhi]
} J72kjj&C
private static String[] name={ 8+_e=_3R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ` NvJ
}; %8%0l*n'
_32 o7}!x
private static Sort[] impl=new Sort[]{ !| GD8i
new InsertSort(), =WFG[~8
new BubbleSort(), #)%dG3)e
new SelectionSort(), QbAEWm
new ShellSort(), -S$Y0FDV
new QuickSort(), )Oj%3
new ImprovedQuickSort(), pEGHW;
new MergeSort(), DoJ3zYEk
new ImprovedMergeSort(), cC`PmDGq
new HeapSort() ?0+J"FH# W
}; Fmrl*tr
6x_D0j%^]
public static String toString(int algorithm){ \"=@uqar2
return name[algorithm-1]; ^w}BXVn
} DVyxe}
<m?/yREK2
public static void sort(int[] data, int algorithm) { G-T2b,J [
impl[algorithm-1].sort(data); ud,_^Ul
} Xu5^ly8p9q
V)r6bb{^
public static interface Sort { Zo5.Yse
public void sort(int[] data); 5l(NX
} ]u O|YLWp
;=ERm=
public static void swap(int[] data, int i, int j) { <Okl.Iz>
int temp = data; 3HmJixy
data = data[j]; )eSD5hOI)
data[j] = temp; `zRm "G
} K~>ESMZ5
} 3LD`Ep