[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; /8s>JPXKH[
} KA]5tVQA
int i1=l; qfB!)Y
int i2=mid+1; Vg1MA
for(int cur=l;cur<=r;cur++){ d)v'K5
if(i1==mid+1) MVe4[<
data[cur]=temp[i2++]; \yA*)X+
else if(i2>r) kBJx`tjtp
data[cur]=temp[i1++]; )E=~ _`XO
else if(temp[i1] data[cur]=temp[i1++]; oJor ]QYK
else -f%J_`
data[cur]=temp[i2++]; .Gnzu"lod
} Ve|=<7%%S
} ~&Y%yN^
4k=LVu]Kcr
} 43o!Vr/S
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改进后的归并排序: tp3 !6I6
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package org.rut.util.algorithm.support; E9PD1ADR
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import org.rut.util.algorithm.SortUtil; -jL10~/
PRyzUG&
/** {{e+t8J??
* @author treeroot \PgMMc4'
* @since 2006-2-2 eih~ SBSH
* @version 1.0 U:O&FE
*/ "A3V(~%!
public class ImprovedMergeSort implements SortUtil.Sort { %&S :W%qm?
H!uq5`j0K
private static final int THRESHOLD = 10; sWX\/Iyy2p
Nmu=p~f}3`
/* ,~qjL|9
* (non-Javadoc) )W$@phY(I
* g7<u eF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #(Ezt% ^
*/ {&s.*5
public void sort(int[] data) { 5SwQ9#
int[] temp=new int[data.length]; DeRC_ [
mergeSort(data,temp,0,data.length-1); -!pg1w06
} ];au! _o
Jnf@u
private void mergeSort(int[] data, int[] temp, int l, int r) { 8z'_dfP=5
int i, j, k; Ox}a\B8
int mid = (l + r) / 2; J={IGA
if (l == r) SW*Yu{
return; }Jk=ZBVjT7
if ((mid - l) >= THRESHOLD) {N 0i 3e s
mergeSort(data, temp, l, mid); >r5s>A[YC
else B/ACU
insertSort(data, l, mid - l + 1); E3,Nc`'m9
if ((r - mid) > THRESHOLD) f|-%.,
mergeSort(data, temp, mid + 1, r); uUI@!)@2
else PvqG5-L~W
insertSort(data, mid + 1, r - mid); " )/febBS
Y8%*S%yO
for (i = l; i <= mid; i++) { vHxLn/
temp = data; bf-V Q7
} y?yWM8
for (j = 1; j <= r - mid; j++) { @DA.$zn&
temp[r - j + 1] = data[j + mid]; =/L;}m)7
} $VyH2+ jC
int a = temp[l]; V[r1bF
int b = temp[r]; Pvu*Y0_p
for (i = l, j = r, k = l; k <= r; k++) { CWS&f g%o{
if (a < b) { ca!DZ%y
data[k] = temp[i++]; \XT~5N6
a = temp; )MU)'1jc,
} else { o<nkK+=Afm
data[k] = temp[j--]; >.f'_2#Z&
b = temp[j]; v* /}s:a
} `%A>{A"
} k&SI-jxj
} ^h\Y.
6=i@ttAK
/** 23~KzC
* @param data \S`|7JYW
* @param l x4nmDEpa
* @param i 7\sRf/
*/ $mq@g
private void insertSort(int[] data, int start, int len) { w@"l0gm+u[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0z:BSdno
} e!JC5Al7
} c6Z\ecH9
} m(?ZNtBQt
} {|ChwM\x
OVgx2_F
堆排序： 4J6,_8`U
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package org.rut.util.algorithm.support; j9]H~:g$d
O[/l';i
import org.rut.util.algorithm.SortUtil; BARs1^pR4
leomm+f^
/** y(uE
* @author treeroot ej&ZE n
* @since 2006-2-2 La#otuw+?
* @version 1.0 STY\c5
*/ :r,o-D
public class HeapSort implements SortUtil.Sort{ f+iM_MI
^t#W?rxp&
/* (non-Javadoc) !%s&GD8&l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {Wp5Ane
*/ $MB/j6#j
public void sort(int[] data) { /agX! E4s
MaxHeap h=new MaxHeap(); l!^+Xeg~
h.init(data); /!L#cUog
for(int i=0;i h.remove(); J_ S]jE{
System.arraycopy(h.queue,1,data,0,data.length); ?,0 5!]
} ;&v~tD7
uy^vQ/
private static class MaxHeap{ "ZU CYYre
_yJAn\
void init(int[] data){ R#0Z
this.queue=new int[data.length+1]; b9gezXAcd
for(int i=0;i queue[++size]=data; H^N 5yOj/
fixUp(size); DEcsFC/SK
} vsL)E:0
} E |BE(F;K
lyYi2& %
private int size=0; }E%#g#
"UDV4<|^k
private int[] queue; Hp!c\z;
N akSIGm
public int get() { FJl_2
return queue[1]; }uaRS9d
} H6I]GcZ$
++)3*+N+
public void remove() { S_ Pa .
SortUtil.swap(queue,1,size--); l[D5JnWxt
fixDown(1); )lsR8Hi8
} 2Yt+[T*
file://fixdown #ovmX
private void fixDown(int k) { 5o&noRIIr
int j; gN("{j1Q
while ((j = k << 1) <= size) { @ZUrr_|
if (j < size %26amp;%26amp; queue[j] j++; |q:p^;x
if (queue[k]>queue[j]) file://不用交换 4I97<zmrT
break; >|S&@<
SortUtil.swap(queue,j,k); (+^z9p7/!
k = j; byW9]('e
} E0o?rgfdq
} 9< $n'g
private void fixUp(int k) { {+V]saYP
while (k > 1) { eXdE?j
int j = k >> 1; Z+G.v=2q<
if (queue[j]>queue[k]) y$7vJl.uS/
break; +4Uxq{.K
SortUtil.swap(queue,j,k); l9"T"9C{
k = j; 8UahoNrSt
} r%^l~PN
} Gec?
^[]@dk9
} c4'k-\JvT
f1_b``M
} #OT8_D
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SortUtil： lPywrTG0
[m9Iz!E
package org.rut.util.algorithm; %Ct^{k~1
nGqD{!i<
import org.rut.util.algorithm.support.BubbleSort; O^+H:Y|
import org.rut.util.algorithm.support.HeapSort; yD-L:)@"
import org.rut.util.algorithm.support.ImprovedMergeSort; 7ZsBYP8%
import org.rut.util.algorithm.support.ImprovedQuickSort; ev}ugRxt|k
import org.rut.util.algorithm.support.InsertSort; &eqeQD6
import org.rut.util.algorithm.support.MergeSort; *49lM;
import org.rut.util.algorithm.support.QuickSort; [$<\*d/
import org.rut.util.algorithm.support.SelectionSort; ..5rW0lr
import org.rut.util.algorithm.support.ShellSort; (&)PlIi7
8wXnc%
/** WX9ABh&5
* @author treeroot g]V_)}
* @since 2006-2-2 m@Vz42g~+
* @version 1.0 @*VfG CQ(
*/ Z@G[\"
public class SortUtil { nH=8I~jp
public final static int INSERT = 1; @g{FNXY$m
public final static int BUBBLE = 2; 3iI 4yg
public final static int SELECTION = 3; Q2L>P<87T
public final static int SHELL = 4; EL?6x
public final static int QUICK = 5; h'tb
public final static int IMPROVED_QUICK = 6; &O:IRR7p
public final static int MERGE = 7; Yi5^#G
public final static int IMPROVED_MERGE = 8; Gz,?e]ZV
public final static int HEAP = 9; eq!>~: #
;;zQVD )X
public static void sort(int[] data) { 5S EyAhB
sort(data, IMPROVED_QUICK); m);0sb
} iW #|N^
private static String[] name={ !d)Vr5x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [K=M;$iQ
}; l[AQyR1+/
KS3>c7
private static Sort[] impl=new Sort[]{ \Xr Sn_p-
new InsertSort(), D\ ;(BB
new BubbleSort(), 5(+PIKCjC
new SelectionSort(), U_8 Z&
new ShellSort(), fVXZfq6
new QuickSort(), VPh0{(O^=
new ImprovedQuickSort(), !*tV[0i2
new MergeSort(), @X?7a]+;8
new ImprovedMergeSort(), OABMIgX
new HeapSort() ?DwI>< W
}; 4Ucs9w3[
aJ{-m@/5
public static String toString(int algorithm){ e}u68|\EC
return name[algorithm-1]; 1LK`
} \|gE=5!Am=
z[0+9=<Y
public static void sort(int[] data, int algorithm) { <0w"$.K#3
impl[algorithm-1].sort(data); cR*5iqA
} 2:6W_[7l!
<y}9Twdy
public static interface Sort { l 10p'9n
public void sort(int[] data); g5OKhL0u
} d5z=fH9
2&,jO+BqE@
public static void swap(int[] data, int i, int j) { tpY]Mz[J
int temp = data; v><c@a=[
data = data[j]; :]rb}1nLB
data[j] = temp; `k.Tfdu)K
} [XKudw%
} aob+_9o