[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; M'/aZ# b
} i7ly[6{^pr
int i1=l; k!{p7*0
int i2=mid+1; #^]n0!
for(int cur=l;cur<=r;cur++){ 1UQHq@aM
if(i1==mid+1) z<5m fAm
data[cur]=temp[i2++]; ]~Z6;
else if(i2>r) 3'X.}>o
data[cur]=temp[i1++]; {%C7EAq*
else if(temp[i1] data[cur]=temp[i1++]; 4!wR_@W^El
else e>AE8T
data[cur]=temp[i2++]; 0P]E6hWgg
} 1m.W<
} Nr=d<Us9f
=lpQnj"
} 3*@5S]]
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改进后的归并排序: y.q(vzg\_
m?&1yU9
package org.rut.util.algorithm.support; plZ>03(6Q
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import org.rut.util.algorithm.SortUtil; Zcc9e03
k]I0o)+O.
/** +k>.Q0n%m
* @author treeroot 9WR6!.y#f
* @since 2006-2-2 ~_!F01s
* @version 1.0 u#@Q:tnN_
*/ yR\btx|e5~
public class ImprovedMergeSort implements SortUtil.Sort { SZXY/~=h
[#sz WNfU
private static final int THRESHOLD = 10; ]H1I,`=@
fX|Y;S-@+
/* Gmz6$^D
* (non-Javadoc) j.@\3'
* DX|# gUAm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,zTy?OQ
*/ J:\|Nc?
public void sort(int[] data) { A\.GV1
int[] temp=new int[data.length]; /ID?DtJ
mergeSort(data,temp,0,data.length-1); IOV(seEY
} a 7,C>%I
aVd,xl
private void mergeSort(int[] data, int[] temp, int l, int r) { @Rw!'T
int i, j, k; 9\DQ>V TQ
int mid = (l + r) / 2; _zwUE
if (l == r) 1N>|yQz
return; _> *jH'
if ((mid - l) >= THRESHOLD) ~7Tc$ "I
mergeSort(data, temp, l, mid); Mwr"~?\\
else >cCR2j,r
insertSort(data, l, mid - l + 1); <|Pun8j
if ((r - mid) > THRESHOLD) I}vmU^Y>
mergeSort(data, temp, mid + 1, r); 7?%k7f
else [`):s= FC
insertSort(data, mid + 1, r - mid); >L 0_dvr
;{%\9nS
for (i = l; i <= mid; i++) { %$Aqle[
temp = data; hHMN6i
} ])!o5`ltZ
for (j = 1; j <= r - mid; j++) { 2j[&=R/.
temp[r - j + 1] = data[j + mid]; [YcG(^^
} d|yAs5@
int a = temp[l]; 9& 83n(m
int b = temp[r]; hBX!iukT|{
for (i = l, j = r, k = l; k <= r; k++) { "UJ S5[7$
if (a < b) { ixT:)|'i
data[k] = temp[i++]; c. 2).Jt,
a = temp; Uh):b%bS;J
} else { a,WICv0E
data[k] = temp[j--]; #Q`dku%V:
b = temp[j]; jyZWVL:_
} LMAE)]N
} vTx2E6
} 9^G/8<^^>
t?'!$6
/** }=]M2}
* @param data E`uY1B[c
* @param l n@,G8=J?
* @param i 7w6cwHrL@
*/ csW43&
private void insertSort(int[] data, int start, int len) { FK5<6n,U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 20nP/e
} VN\W]jT
} DRi<6Ob
} k+ty>bP=
} @6]sNm
ZP\-T*)l$
堆排序： ^8AXxE
K8UP,f2
package org.rut.util.algorithm.support; )j0TeE1R
;k>&FWEG
import org.rut.util.algorithm.SortUtil; W)f/0QX}W
n' q4
/** esMX-.8Cx
* @author treeroot +2&@x=xy
* @since 2006-2-2 X6@WwM~qz
* @version 1.0 ;CPr]avY
*/ :i.{
public class HeapSort implements SortUtil.Sort{ J2xw) +
B=^)Ub5'
/* (non-Javadoc) li}1S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g9Xu@N;bL
*/ <#u=[_H
public void sort(int[] data) { }n3/vlW9
MaxHeap h=new MaxHeap(); C8V/UbA /
h.init(data); UVd7 JGR
for(int i=0;i h.remove(); 65#'\+
System.arraycopy(h.queue,1,data,0,data.length); )\J+Kiy)
} G <i@ 5\#
JSCZ{vJ$
private static class MaxHeap{ UJCYs`y
opy("qH
void init(int[] data){ DkvF5c&
this.queue=new int[data.length+1]; ]dGw2y
for(int i=0;i queue[++size]=data; <FcG oGK
fixUp(size); C8 xZ;V]
} 0"\H^
} 6i.-6></
CzRc%%BA
private int size=0; %'s>QF]'
_lGdUt 2
private int[] queue; N`L0Vd
e%@~MQ-
public int get() { X[&Wkr8x '
return queue[1]; N D(/uyI
} 4{rZppm
0 yuW*z
public void remove() { *KV0%)}sbL
SortUtil.swap(queue,1,size--); x,|hU@h
fixDown(1); a1+#3X.
} C/vIEYG4
file://fixdown $o0iLFIX/
private void fixDown(int k) { zMm#Rhn
int j; V )x$|!(
while ((j = k << 1) <= size) { !Wy6/F@Z
if (j < size %26amp;%26amp; queue[j] j++; vY${;#~|
if (queue[k]>queue[j]) file://不用交换 naYrpK,.
break; c#Sa]n
SortUtil.swap(queue,j,k); PT=2@kH
k = j; F`Q[6"<a
} }L+L"l&
} aI6$?wus
private void fixUp(int k) { (Pf+0,2
while (k > 1) { _aad=BrMK
int j = k >> 1; H%UL%l$
if (queue[j]>queue[k]) C":32_q
break; Q<^Tl(`/N?
SortUtil.swap(queue,j,k); '_w=k4
k = j; l_P-j96WD
} aE&,]'6
} E:JJ3X|
juka0/
} 6y+Kjd/D
\ 3wfwu.q
} #(#Wv?r6
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SortUtil： R7$:@<:g
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package org.rut.util.algorithm; B_nVP
\Xm,OE_v"
import org.rut.util.algorithm.support.BubbleSort; ~$:|VHl
import org.rut.util.algorithm.support.HeapSort; T>}5:,N~
import org.rut.util.algorithm.support.ImprovedMergeSort; iYORu3
import org.rut.util.algorithm.support.ImprovedQuickSort; KIui(n#/
import org.rut.util.algorithm.support.InsertSort; !sDh4jQ`
import org.rut.util.algorithm.support.MergeSort; v(B<Nb
import org.rut.util.algorithm.support.QuickSort; /^X/8
import org.rut.util.algorithm.support.SelectionSort; T (OW
import org.rut.util.algorithm.support.ShellSort; Sp@^XmX(S
tZ=E')!\
/** k9 "[H'
* @author treeroot 8oUpQcim
* @since 2006-2-2 WHsgjvh"
* @version 1.0 YQ+tDZY8`
*/ >XY`*J^
public class SortUtil { o<<xY<
public final static int INSERT = 1; P3cRl']
public final static int BUBBLE = 2; !>{G,\^=pT
public final static int SELECTION = 3; A'q#I>j`
public final static int SHELL = 4; dx;Ysn0-
public final static int QUICK = 5; ,sA[)wP{
public final static int IMPROVED_QUICK = 6; !/}O>v~o
public final static int MERGE = 7; tk!t Y8j
public final static int IMPROVED_MERGE = 8; GNXHM*~
public final static int HEAP = 9; Bg&i63XL$$
c_-drS
public static void sort(int[] data) { &<wuJ%'>)Z
sort(data, IMPROVED_QUICK); xIxn"^'
} (g[h 8 c
private static String[] name={ +W:=e,=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fBRo_CU8!
}; mz@T
KNS.Nw7
private static Sort[] impl=new Sort[]{ :n0vQ5a
new InsertSort(), p[hZ@f(z
new BubbleSort(), @x"0_Qw
new SelectionSort(), AvdXEY(-
new ShellSort(), 0J?~N`#O|
new QuickSort(), O\E/. B
new ImprovedQuickSort(), n#q<`}u,
new MergeSort(), E=e*VEjy
new ImprovedMergeSort(), eZ|%<Wpu
new HeapSort() 1u: gFUb
}; PV9pa/`@
k"NVV$;
public static String toString(int algorithm){ t?}zdI(4
return name[algorithm-1]; V}dJ.I /#
} 5Yl<h)1
k p<OJy
public static void sort(int[] data, int algorithm) { 9[G[$c
impl[algorithm-1].sort(data); Zb1<:[
} Z8rvWH9
9?0^ap,T
public static interface Sort { I_<I&{N>
public void sort(int[] data); =bHD#o|R
} H-~6Z",1
kKAP"'v
public static void swap(int[] data, int i, int j) { >sK!F$
int temp = data; ~ ip,Nl
data = data[j]; ~ vJ,`?
data[j] = temp; VH+%a<v"
} vU767/
} *Eo?k<:zPm