[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; (FG^UA#'
} :Dj#VN
int i1=l; 5pmQp}}R
int i2=mid+1; o~k;D{Snr
for(int cur=l;cur<=r;cur++){ !pl_Ao~(
if(i1==mid+1) Rhv%6ekI
data[cur]=temp[i2++]; }>,CUz
else if(i2>r) .8x@IWJD
data[cur]=temp[i1++]; -tMA
else if(temp[i1] data[cur]=temp[i1++]; b@!:=_Mr
else jJc07r']
data[cur]=temp[i2++]; F:,#?
} >"b[r
} 8(^ ,r#Gy
kJ__:rS(T_
} hm6pxFkX_
?y46o2b*)
改进后的归并排序: ZBC@xM&-
6: GN(R$0
package org.rut.util.algorithm.support; r*]uR /Z$
8 #Fh>
import org.rut.util.algorithm.SortUtil; Wxc^_iqA1
h&P {p _Y
/** d "B5==0I
* @author treeroot La]4/=a
* @since 2006-2-2 XR<G}x
* @version 1.0 hRLKb}
*/ POY=zUQ'/
public class ImprovedMergeSort implements SortUtil.Sort { 9':/Sab:7v
oAaf)?8
private static final int THRESHOLD = 10; H<XlUCr_~+
E)Srj~$d
/* :cb[M5c
* (non-Javadoc) -aT=f9u
* 5Fh8*8u6hL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .5NZf4:C
*/ rXuAixu!t
public void sort(int[] data) { .c03}RTC^
int[] temp=new int[data.length]; (qbc;gBy
mergeSort(data,temp,0,data.length-1); UC(9Dz
} *.xZfi_|
7G2vYKC'
private void mergeSort(int[] data, int[] temp, int l, int r) { 38"cbHE3
int i, j, k; egbb1+tY
int mid = (l + r) / 2; OFQ{9
if (l == r) "!^c
return; 'cYQ?;
if ((mid - l) >= THRESHOLD) C?S~L5a#oC
mergeSort(data, temp, l, mid); u,\xok"
else L/5z!
insertSort(data, l, mid - l + 1); &%}bRPUl
if ((r - mid) > THRESHOLD) wCC-Y kA
mergeSort(data, temp, mid + 1, r); }d@LSaM
else T6;>O`B.r
insertSort(data, mid + 1, r - mid); P$Axc/H
FJW`$5?
for (i = l; i <= mid; i++) { -h=c=P
temp = data; ?f9$OLEB
} &`m~o/
for (j = 1; j <= r - mid; j++) { %Dl_}
temp[r - j + 1] = data[j + mid]; ti+pUlVrM
} -;f+; M
int a = temp[l]; BJ"Ay@D*
int b = temp[r]; Na-q%ru
for (i = l, j = r, k = l; k <= r; k++) { Up'."w_zE
if (a < b) { V54q"kP,@.
data[k] = temp[i++]; SK}HXG{?
a = temp; 2=Jmi?k
} else { B JU*`Tx
data[k] = temp[j--]; 9Y\F53p&j
b = temp[j]; aam1tm#Q
} -}NAb^d
} 8.PXTOhVL
} Z5yt]-WN&
'H|;%J6d>
/** *TJ<
* @param data yB|]LYh
* @param l +A&EKk%$ |
* @param i P&h/IBA_
*/ 7G?Ia%u
private void insertSort(int[] data, int start, int len) { y{:]sHyG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PMD,8]|
} X E!2Q7Q9
} ?!R%o
} {7/A
} 1`nc8qC
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堆排序： >c&4_?d&,A
H7y&N5.V
package org.rut.util.algorithm.support; {jrZ?e-q
IruyE(;HS
import org.rut.util.algorithm.SortUtil; G3oxa/mO
:~-)Sm+^
/** VyRW'
* @author treeroot dE+CIjW5
* @since 2006-2-2 )`e^F9L
* @version 1.0 -,[~~
*/ _!|=AIX
public class HeapSort implements SortUtil.Sort{ <XU8a:w'T
h5<T.vV
/* (non-Javadoc) c9 gz!NE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W<Bxm|
*/ 0c%@e2(N
public void sort(int[] data) { aB/{ %%o
MaxHeap h=new MaxHeap(); 6JUav."`~
h.init(data); 3we.*\2$
for(int i=0;i h.remove(); jq7vOr-_g
System.arraycopy(h.queue,1,data,0,data.length); (N&k}CO]W
} /QV [N
u Eu6f
private static class MaxHeap{ n$nne6|O
TJeou#=/
void init(int[] data){ H9.oVF^~
this.queue=new int[data.length+1]; S(@*3]!q
for(int i=0;i queue[++size]=data; _G_ &Me0
fixUp(size); kyp U&F
} tn(f rccy
} }G"r3*
Q>cL?ie
private int size=0; #nxER
U`?zC~
private int[] queue; o'9OPoof:.
/h{go]&Nb
public int get() { rTN"SQt
return queue[1]; B:.;,@r]
} Vp5V m
;9 =}_h)]
public void remove() { QwKky ^A
SortUtil.swap(queue,1,size--); PR48~K,?
fixDown(1); CnM+HN30o
} D?^`(X P
file://fixdown :u[ oc.
private void fixDown(int k) { H>gWxJ 5
int j; O('i*o4!}
while ((j = k << 1) <= size) { yffU% )
if (j < size %26amp;%26amp; queue[j] j++; ?CcR 7l
if (queue[k]>queue[j]) file://不用交换 vHZX9LQU0+
break; Rfkzv=<"X
SortUtil.swap(queue,j,k); PPuXas?i
k = j; 9n06n$F
} P wt ?9I
} c,b`N0dOKL
private void fixUp(int k) { c,g]0S?gu
while (k > 1) { 0KWy?6 X
int j = k >> 1; ~v{C6)
if (queue[j]>queue[k]) ?qq!%4mTB
break; gxBl1
SortUtil.swap(queue,j,k); [Gh%nsH
k = j; B^Rw?:hN
} $1Q3Y'Q9
} $9j>VGf=
n1k$)S$iiy
} Wl9I`Itg
a#OhWqu$
} u&l>cJ'
*SMoodFBS
SortUtil： b#/V;
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package org.rut.util.algorithm; 1@1+4P0NF[
%^Q@*+{:f
import org.rut.util.algorithm.support.BubbleSort; Zu [?'
import org.rut.util.algorithm.support.HeapSort; b.w(x*a
import org.rut.util.algorithm.support.ImprovedMergeSort; '&_y*"/c
import org.rut.util.algorithm.support.ImprovedQuickSort; Up1$xLSl
import org.rut.util.algorithm.support.InsertSort; ,=q7}5o Y
import org.rut.util.algorithm.support.MergeSort; 5 b#" G"
import org.rut.util.algorithm.support.QuickSort; mcP{-oJ0W
import org.rut.util.algorithm.support.SelectionSort; =/!{<^0
import org.rut.util.algorithm.support.ShellSort; \\E_W9.u
8CN7+V
/** V29S*
* @author treeroot :yFTaniJ'.
* @since 2006-2-2 &y+PSa%n
* @version 1.0 SSA%1l2!
*/ h0Sy']3m
public class SortUtil { &K}(A{
public final static int INSERT = 1; I;kUG_c(4
public final static int BUBBLE = 2; W?4&lC^G
public final static int SELECTION = 3; V5(tf'
public final static int SHELL = 4; 5~kW-x
public final static int QUICK = 5; cx1WGbZ
public final static int IMPROVED_QUICK = 6; D x>1y
public final static int MERGE = 7; sJjl)Qs)T
public final static int IMPROVED_MERGE = 8; ECE{xoc
public final static int HEAP = 9; mPw56>
6qHvq A,
public static void sort(int[] data) { 8h@)9Q]d\
sort(data, IMPROVED_QUICK); l/y Kc8^<
} 4%#V^??E
private static String[] name={ 9$4/frd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qMW%$L\HA
}; TGt1d
#:Sy`G6!?
private static Sort[] impl=new Sort[]{ -G^t-I
new InsertSort(), bdsHA2r`s
new BubbleSort(), tc49Ty9$[
new SelectionSort(), j4 &
new ShellSort(), c}I8!*\
new QuickSort(), @88z{
new ImprovedQuickSort(), cQ8$,fo
new MergeSort(), _nIqy&<
new ImprovedMergeSort(), 4LB9w21
new HeapSort() tl,x@['p`
}; &d|VH y+
2A18hP`^
public static String toString(int algorithm){ LK-K_!F
return name[algorithm-1]; /Mi-lh^j-
} 9B?t3:
w7*b}D@65\
public static void sort(int[] data, int algorithm) { BF1O|Q|d6
impl[algorithm-1].sort(data); ,$zSJzS
} #G4~]Qml
-XDP-Trk
public static interface Sort { \aJ-q?=
public void sort(int[] data); bTy'5"
} 3Mh,NQB
T0]%(F/8
public static void swap(int[] data, int i, int j) { D=I5[t0c4
int temp = data; gQ@Pw4bA
data = data[j]; 65`'Upu
data[j] = temp; A86lyBDQ*
} ]9yA0,z/
} lo]B5_en