[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; "NGfT:HV
} ]7Sf)
int i1=l; 8(L2w|+B<
int i2=mid+1; NjOUe?BQ
for(int cur=l;cur<=r;cur++){ R]&Csr#~
if(i1==mid+1) e(|Z<6
data[cur]=temp[i2++]; -bHlFNRm
else if(i2>r) oeZuvPCl
data[cur]=temp[i1++]; %N fpEo
else if(temp[i1] data[cur]=temp[i1++]; /:(A9b-B
else t(uvc{K*
data[cur]=temp[i2++]; }^&f {
} PgT8 1u
} ?u@jedQ
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} '6&o:t
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改进后的归并排序: a{hc{
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package org.rut.util.algorithm.support; Q+9:]Bt
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import org.rut.util.algorithm.SortUtil; |.0~'
%\T,=9tD\
/** K3[+L`pz
* @author treeroot o9"?z
* @since 2006-2-2 U{M3QOF
* @version 1.0 @=dv[P"jn
*/ aXJ/"k #Tl
public class ImprovedMergeSort implements SortUtil.Sort { 6Jb0MX"AVr
NGl 8*Af
private static final int THRESHOLD = 10; 3,{eH6,O7M
7KhS{w6
/* rMbq_5}
* (non-Javadoc) DlE,aYB
* $">j~!'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kF~(B]W(
*/ k/wD@H N
public void sort(int[] data) { qfE0J;e
int[] temp=new int[data.length]; 6Uk+a=Ar
mergeSort(data,temp,0,data.length-1); 7`;sX?R
} J#F5by%8
/u4RZ|&as
private void mergeSort(int[] data, int[] temp, int l, int r) { J~]@#=,v
int i, j, k; 3rH}/`d4
int mid = (l + r) / 2; @GQfBV|3
if (l == r) j2_j5Hgo
return; xS/W}-dPv
if ((mid - l) >= THRESHOLD) s!/lQo5/
mergeSort(data, temp, l, mid); `M6"=)twu
else bkDVW
insertSort(data, l, mid - l + 1); :QGo -,6-
if ((r - mid) > THRESHOLD) tSJ#
mergeSort(data, temp, mid + 1, r); W?.469yy
else h' !C
insertSort(data, mid + 1, r - mid); ?0qD(cfx<
pS ](Emn`.
for (i = l; i <= mid; i++) { :)lG}c
temp = data; |di(hY|
} S=!WFKcJR
for (j = 1; j <= r - mid; j++) { w_Slg&S
temp[r - j + 1] = data[j + mid]; y&,|+h
} 'lA}E
int a = temp[l]; K_)~&Cu*'
int b = temp[r]; qsep9z.
for (i = l, j = r, k = l; k <= r; k++) { VRQ`-#
if (a < b) { c.IUqin
data[k] = temp[i++]; M8X6!"B$Y
a = temp; {f#QZS!E
} else { I$t8Ko._"
data[k] = temp[j--]; AF{uFna
b = temp[j]; <.n,:ir
} 5cIZ_#
} EyA ny\"
} <}{<FXk[
)-)rL@s.
/** MOaI~xZ
* @param data ))|d~m
* @param l T:@6(_Z
* @param i yogavCD9b/
*/ \(i'iC
private void insertSort(int[] data, int start, int len) { l[$GOLeS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lfHN_fE>Mq
} 7s?#y=M
} 7! >0
} FAdTm#tgW]
} . fja;aG
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堆排序： agx8*x
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package org.rut.util.algorithm.support; FE!jN-#
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import org.rut.util.algorithm.SortUtil; {q)d
H_RfIX)X
/** iN Oj@3x
* @author treeroot %(W&(eN
* @since 2006-2-2 8)1q,[:M
* @version 1.0 {k3ItGQ_
*/ =m2_:&@0x
public class HeapSort implements SortUtil.Sort{ W:RjWn@<
2~$S @c
/* (non-Javadoc) ),p0V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j J{F0o
*/ LRu,_2"
public void sort(int[] data) { r89AX{:
MaxHeap h=new MaxHeap(); /&Oo)OB;
h.init(data); l|WFS
for(int i=0;i h.remove(); F}u'A,Hc
System.arraycopy(h.queue,1,data,0,data.length); >SDQ@63E?
} (Ut8pa+yX
p*Q-o
private static class MaxHeap{ !y b06Z\f
B8Fb$
void init(int[] data){ RD:G9[
this.queue=new int[data.length+1]; $^iio@SW{
for(int i=0;i queue[++size]=data; Fa>f'VXx
fixUp(size); #4bT8kq
} u4~+Bc_GL
} \.mVLLtG
OK80-/8HI
private int size=0; "++\6H<
1@L18%h
private int[] queue; n/5T{NfG
O.B9w+G=
public int get() { 2/4zg
return queue[1]; t<` As6}
} Nj4CkMM[3
JW[6 ^Rw
public void remove() { D-BT`@~l
SortUtil.swap(queue,1,size--); RdPk1?}K
fixDown(1); i4|R0>b
} nm1dd{U6^
file://fixdown [L+*pW+$\.
private void fixDown(int k) { k4V3.i!E
int j; ?-)!dl%N
while ((j = k << 1) <= size) { O"'xAPQW
if (j < size %26amp;%26amp; queue[j] j++; v'S]g^
if (queue[k]>queue[j]) file://不用交换 &K0b3AWc
break; `CVkjLiy
SortUtil.swap(queue,j,k); 53:~a
k = j; <8b1OdA
} (U&
} -SM_JR3<
private void fixUp(int k) { $$m0mK
while (k > 1) { P5?VrZy
int j = k >> 1; _ARG "
if (queue[j]>queue[k]) BFW b0;+
break; %!nI]|
SortUtil.swap(queue,j,k); !vf:mMo
k = j; 8+[Vo_]
} %N-aLw\
} x\G%
v%qOW)].
} 1@p,
$b|LZE\bU.
} + kMj|()>\
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SortUtil： C})Dvh
Vq+7 /+2"
package org.rut.util.algorithm; R)66qRf
^Ye(b7Gd
import org.rut.util.algorithm.support.BubbleSort; Br9j)1;
import org.rut.util.algorithm.support.HeapSort; <Ja&z M
import org.rut.util.algorithm.support.ImprovedMergeSort; 1+Gq<]@G
import org.rut.util.algorithm.support.ImprovedQuickSort; ?\8aT"o
import org.rut.util.algorithm.support.InsertSort; Eto"B"
import org.rut.util.algorithm.support.MergeSort; j_2g*lQ7a
import org.rut.util.algorithm.support.QuickSort; TMMKRC1<
import org.rut.util.algorithm.support.SelectionSort; !=:>yWQ
import org.rut.util.algorithm.support.ShellSort; jM$bWtq2
qt@/
/** 3l?|+sU>O
* @author treeroot AT1cN1:4?
* @since 2006-2-2 R/v|ZvI
* @version 1.0 u&Ic
*/ D@La-K*5
public class SortUtil { N] sbI)Z@
public final static int INSERT = 1; &AJ bx
public final static int BUBBLE = 2; Y|LL]@Lv
public final static int SELECTION = 3; k";dK*hD,
public final static int SHELL = 4; C!^A\T7p
public final static int QUICK = 5; H*N<7#
public final static int IMPROVED_QUICK = 6; P6GTgQ<'BA
public final static int MERGE = 7; ooJxE\L
public final static int IMPROVED_MERGE = 8; M^'1Q.K
public final static int HEAP = 9; >;4q
.5Y{Yme
public static void sort(int[] data) { z]N#.utQ
sort(data, IMPROVED_QUICK); ?IAu,s*u
} |V\{U j
private static String[] name={ Jai]z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e=(Y,e3
}; `$f`55e
"]=OR>
private static Sort[] impl=new Sort[]{ uNn1qV
new InsertSort(), :o^ioX.J
new BubbleSort(), X&zGgP/
new SelectionSort(), +zMhA p
new ShellSort(), )r46I$]>
new QuickSort(), GPHb-
new ImprovedQuickSort(), + -Rf@
new MergeSort(), 6HCg<_j]
new ImprovedMergeSort(), q#3T L<
new HeapSort() %J1'>nI!q
}; # QwX|x{
6c]4(%8
public static String toString(int algorithm){ ^)9/Wz _x
return name[algorithm-1]; h/tCve3Z
} G06;x
F\N0<o
public static void sort(int[] data, int algorithm) { 7#C$}1XJ1
impl[algorithm-1].sort(data); \L(jNN0_R
} }SWfP5D@
9!jF$
public static interface Sort { I+ |uyc
public void sort(int[] data); d\#yWY
} AVjRhe
9R$$(zB 1;
public static void swap(int[] data, int i, int j) { n@+?tYk*e
int temp = data; .eIs$
data = data[j]; g5|&6+t.
data[j] = temp; HVA:|Z19
} 7=N%$]DKZ
} '|]}f}Go