[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; l-W)?d
} :I7qw0?
int i1=l; Hk+44
int i2=mid+1; Gi-pi=#&cs
for(int cur=l;cur<=r;cur++){ Ht+roY
if(i1==mid+1) R5QW4i9
data[cur]=temp[i2++]; 2|\mBP`ok
else if(i2>r) gQik>gFr
data[cur]=temp[i1++]; !bLCha\
else if(temp[i1] data[cur]=temp[i1++]; !NNPg?Y
else z =H?@z
data[cur]=temp[i2++]; `f}ZAX
} |0Fo{
} 8*&-u +@%
B/3~[ '
} }N-UlL(
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改进后的归并排序: W (TTsnnx
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package org.rut.util.algorithm.support; }Y.@:v j
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import org.rut.util.algorithm.SortUtil; :|k!hG
+7OE,RoQ
/** W:n\,P
* @author treeroot 4J,6cOuW4
* @since 2006-2-2 Mfz(%F|<
* @version 1.0 <5KoK!H
*/ Eyf17
public class ImprovedMergeSort implements SortUtil.Sort { b?0WA.[{
0P$19TN
private static final int THRESHOLD = 10; XdIno}pN
8bMw.u=F
/* m8L %!6o
* (non-Javadoc) +1qvT_
* 'p[6K'Uq5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PJKY$s.
*/ *vBhd2HO
public void sort(int[] data) { =>Ae]mi7
int[] temp=new int[data.length]; Kc r)W
mergeSort(data,temp,0,data.length-1); h\#4[/
} IuPDr %
H4v%$R;K
private void mergeSort(int[] data, int[] temp, int l, int r) { `4@`G:6BL
int i, j, k; *tZ3?X[b
int mid = (l + r) / 2; #|769=1
if (l == r) :W&klUU"
return; :.H@tBi*E
if ((mid - l) >= THRESHOLD) P/~dY[6m
mergeSort(data, temp, l, mid); 5r8 ["
else D.AiqO<z
insertSort(data, l, mid - l + 1); oIE(`l0l
if ((r - mid) > THRESHOLD) y'f-4E<
mergeSort(data, temp, mid + 1, r); }1CO>a<
else `$ bQ8$+Ci
insertSort(data, mid + 1, r - mid); 8_>:0(y
u(r T2
for (i = l; i <= mid; i++) { "OUY^ cM
temp = data; X+emJ&Z$@
} '%Oo1:wJ
for (j = 1; j <= r - mid; j++) { .O~rAu*K
temp[r - j + 1] = data[j + mid]; b,HXD~=
} &C,]c#-+
int a = temp[l]; H!y@.W{_
int b = temp[r]; YA8/TFu<_
for (i = l, j = r, k = l; k <= r; k++) { Tz&cm=
if (a < b) { BI#(L={5
data[k] = temp[i++]; ?b^<Tny
a = temp; 2 (ux
} else { )CL/%I,^
data[k] = temp[j--]; cv_O2Q4,@
b = temp[j]; cP/(h
} ZMyd+C_P2
} c:z}$DK&'
} Y=pRenV'
6*ZZ)W<
/** Tig6<t+Q
* @param data ,,9vk\
* @param l %u|Qh/?7
* @param i QIN# \
*/ Grd9yLF
private void insertSort(int[] data, int start, int len) { 8v;T_VN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n!b*GXb\
} $[=`*m
} ?K}KSJ6_
} JLyFkV/
} OK}8BY
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堆排序： U8g?
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package org.rut.util.algorithm.support; ;NJM3g0I
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import org.rut.util.algorithm.SortUtil; 4P24ySy9F
B;{sr'CP
/** 9qZ|=r]y'
* @author treeroot 9*|An
* @since 2006-2-2 Ke&fTK
* @version 1.0 nDchLVw
*/ t^9q>[/d`
public class HeapSort implements SortUtil.Sort{ 6d 8n1_
N)z] F9Kg
/* (non-Javadoc) 93`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v#IZSBvuQK
*/ oU 8o;zk0
public void sort(int[] data) { Ox/va]e7"
MaxHeap h=new MaxHeap(); K&Q0]r?
h.init(data); JY>I
for(int i=0;i h.remove(); wIbc8ze
System.arraycopy(h.queue,1,data,0,data.length); C$B?|oUJc
} ;#"`]khd
Xg"Mjmr
private static class MaxHeap{ pm;g)p?
7@VR:~n}k
void init(int[] data){ GHWpL\A{8`
this.queue=new int[data.length+1]; M9S[{Jj*
for(int i=0;i queue[++size]=data; }fxH>79g
fixUp(size); -3b0;L&4>x
} lu.2ZQE
} r?2C%GI`
X4*/h$48 w
private int size=0; C[$<7Mi|;
Nb{oH+$b
private int[] queue; qm}7w3I^
55|$Imnf
public int get() { C{S6Ri
return queue[1]; ln!KL'T]
} }mJ)gK5b 6
B "}GAk}V
public void remove() { I`KN8ll
SortUtil.swap(queue,1,size--); tbk9N( R
fixDown(1); 8@Km@o]?
} J5rR?[i{
file://fixdown )'<zC
private void fixDown(int k) { bm7$DKp#
int j; r*3XM{bZ/@
while ((j = k << 1) <= size) { 'XQv>J
if (j < size %26amp;%26amp; queue[j] j++; A><%"9pZ
if (queue[k]>queue[j]) file://不用交换 D{z=)'/F
break; +l3 vIN
SortUtil.swap(queue,j,k); QU4'x4YS
k = j; #6m//0 u
} C"mb-n7s
} If#7SF)n'
private void fixUp(int k) { 1X9sx&5H
while (k > 1) { n2O7n@8
int j = k >> 1; q{JD]A:
if (queue[j]>queue[k]) >zhbipA
break; O 1X !
SortUtil.swap(queue,j,k); ZmHl~MR@
k = j; |$0/:*
} SI(8.$1
} )*JTxMQ
%yrP: fg/
} O@Kr}8^,
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} BR%:`uiQ<
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SortUtil： ^ pR&
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package org.rut.util.algorithm; 1-[{4{R
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import org.rut.util.algorithm.support.BubbleSort; U)o8Tr
import org.rut.util.algorithm.support.HeapSort; Zj^H3h
import org.rut.util.algorithm.support.ImprovedMergeSort; Ek.j@79
import org.rut.util.algorithm.support.ImprovedQuickSort; RGKJO_*J2
import org.rut.util.algorithm.support.InsertSort; +[7u>RJ
import org.rut.util.algorithm.support.MergeSort; K^vMIoh
import org.rut.util.algorithm.support.QuickSort; z'I0UB#
import org.rut.util.algorithm.support.SelectionSort; tw')2UGg
import org.rut.util.algorithm.support.ShellSort; MdfkC6P
6a!X`%N=
/** VEZ/-s/
* @author treeroot 0\o'd\
* @since 2006-2-2 ?k?Hp:8?=
* @version 1.0 s`2o\]
*/ 87/{\h
public class SortUtil { ZqGq%8\.s
public final static int INSERT = 1; S9BJjo
public final static int BUBBLE = 2; n(+:l'#HJ
public final static int SELECTION = 3; pVY.&XBZ$
public final static int SHELL = 4; 5VcYdu3
public final static int QUICK = 5; ']NM_0
public final static int IMPROVED_QUICK = 6; ouI0"R&@
public final static int MERGE = 7; M;bQid@BG
public final static int IMPROVED_MERGE = 8; S{H8}m|MW
public final static int HEAP = 9; w{qYP
Vqr&)i"b$
public static void sort(int[] data) { s_8!x
sort(data, IMPROVED_QUICK); 3IxT2@H)
} ]7O?c=
private static String[] name={ -|kDa1knA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YD%Kd&es
}; +Lr0i_al
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private static Sort[] impl=new Sort[]{ ;vx9xs?6
new InsertSort(), HTG;'$H^
new BubbleSort(), /P%:u0fX,
new SelectionSort(), >JMKEHl.q
new ShellSort(), S'e2~-p0F
new QuickSort(), Ui.F<,E
new ImprovedQuickSort(), ^eRuj)$5A
new MergeSort(), @mazwr{B
new ImprovedMergeSort(), -wt2ydzos
new HeapSort() b,W'0gl
}; wtKh8^:YD
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public static String toString(int algorithm){ YGO@X(ej,
return name[algorithm-1]; 5W48z%MN
} fYi!Z/Ck2
)qIK7;
public static void sort(int[] data, int algorithm) { hdB[H8Q
impl[algorithm-1].sort(data); )Fw)&5B!
} ]gW J,
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public static interface Sort { one>vi`=
public void sort(int[] data); `4qKQJw
} yiq#p"Hs
:KLD~k7yA(
public static void swap(int[] data, int i, int j) { (r4\dp&
int temp = data; ;z>YwRV
data = data[j]; on\\;V_/Q
data[j] = temp; ;~J~g#
} _<7FR:oBZ
} #u$z-M !