[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; ^}z:FI
} /Vv)00
int i1=l; 0(uba3z
int i2=mid+1; @'J~(#}
for(int cur=l;cur<=r;cur++){ Z#;\Rb.x7
if(i1==mid+1) u VUrg;>
data[cur]=temp[i2++]; 5!6iAS+I
else if(i2>r) xTZJ5iZ17
data[cur]=temp[i1++]; 3)^2X
else if(temp[i1] data[cur]=temp[i1++]; 0J5$ Yw1'F
else M|.ykA<D
data[cur]=temp[i2++]; %~Ymb&ugg
} `+Mva
} ]jmZ5h#[
,mD$h?g
} uE#i3( J
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改进后的归并排序: z5f3T D6,
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package org.rut.util.algorithm.support; m&_!*3BAG
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import org.rut.util.algorithm.SortUtil; X5Y. o&
*unJd"<*&@
/** _z"\3hZ
* @author treeroot 3/su1M[
* @since 2006-2-2 (b.Mtd
* @version 1.0 y<yU5
*/ AX{yfL
public class ImprovedMergeSort implements SortUtil.Sort { [s-!tE3-
bU4\Yu
private static final int THRESHOLD = 10; 0}Qd
fAT M?
/* E3_ 5~>
* (non-Javadoc) ~~,#<g[
* }OgZZ8-_M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ab_EH}j1\q
*/ vb\R~%@T,
public void sort(int[] data) { A1jA$
int[] temp=new int[data.length]; V#DNcF~v]f
mergeSort(data,temp,0,data.length-1); evyA#~o
} 4Rl~7|
Op iVQr:
private void mergeSort(int[] data, int[] temp, int l, int r) { lYrW"(2
int i, j, k; ixF
int mid = (l + r) / 2; 0n)UvJ
if (l == r) lR]SGdY
return; 7<F{a"5P
if ((mid - l) >= THRESHOLD) f[$Z<:D-ve
mergeSort(data, temp, l, mid); %bTXu1
else wH qbTA
insertSort(data, l, mid - l + 1); tlmfDQD
if ((r - mid) > THRESHOLD) 4?7OP t6
mergeSort(data, temp, mid + 1, r); O~F8lQ
else 1FRpcE
insertSort(data, mid + 1, r - mid); Y}Nd2
?uE@C3 e
for (i = l; i <= mid; i++) { 1ZfhDtK(
temp = data; -s6;IoG/
} 1,sD'iNb
for (j = 1; j <= r - mid; j++) { @0%^\Qf2
temp[r - j + 1] = data[j + mid]; TUR2|J@n
} 2{-'`lfM%
int a = temp[l]; eJZt&|7N
int b = temp[r]; )G$0:-J-
for (i = l, j = r, k = l; k <= r; k++) { MSS0Sx<f
if (a < b) { !r_2b! dy
data[k] = temp[i++]; t. kOR<
a = temp; myWa>Mvb
} else { (w, Gv-S
data[k] = temp[j--]; >Co5_sCe
b = temp[j]; ;e^`r;]
} iD!]I$
} N1z:9=(I
} Bf6\KI<V2
'uF"O"*
/** C5'#0}6i
* @param data ;jT@eBJ
* @param l CC`Y r
* @param i k*= #XbX
*/ ;kF+V*
private void insertSort(int[] data, int start, int len) { ~YrO>H` B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'sTMUPg`
} J]4Uh_>)
} B3&`/{u
} 8|\?imOp\[
} t9m08K:Y
t>(}LV.
堆排序： NT [~AK9M
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package org.rut.util.algorithm.support; 8u#2M8.5E
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import org.rut.util.algorithm.SortUtil; THDyb9_g
dht*1i3v
/** g%f6D%d)A
* @author treeroot ioS(;2F
* @since 2006-2-2 RE75TqYW
* @version 1.0 [>U =P`
*/ NYp46;
public class HeapSort implements SortUtil.Sort{ zvnR'\A_
.uu[MzMIu
/* (non-Javadoc) XSz)$9~hk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~i/K7qZ
*/ .Zv uhOn^
public void sort(int[] data) { 0:4w@"Q
MaxHeap h=new MaxHeap(); qEV>$>}
h.init(data); VTvNn
for(int i=0;i h.remove(); a/H|/CB3
System.arraycopy(h.queue,1,data,0,data.length); 5j$a3nH
} )*n2,n
o@tc
private static class MaxHeap{ <;nhb
[&a=vE
void init(int[] data){ YhNO{4D
this.queue=new int[data.length+1]; /%w3(e
for(int i=0;i queue[++size]=data; $[DSe~
fixUp(size); l^%W/b>?b
} K';x2ffj
} *b+~@o
eww/tGa
private int size=0; "Z*u2_ H
/p_#8}Uh
private int[] queue; E*X-f"
^26}j uQ
public int get() { t bEJyA
return queue[1]; H|*Ual
} JP*VR=0k?
dw]jF=u
public void remove() { ._IBO;*@
SortUtil.swap(queue,1,size--); /32x|Ow# 1
fixDown(1); Z. G<'
} |KLCO'x
file://fixdown 2h5L#\H"
private void fixDown(int k) { Doc_rQYku
int j; e.jbFSnA
while ((j = k << 1) <= size) { ?."YP[;
if (j < size %26amp;%26amp; queue[j] j++; mJL=H
if (queue[k]>queue[j]) file://不用交换 |QB[f*y5
break; !U8n=A#,-
SortUtil.swap(queue,j,k); >crFIkOJ
k = j; 24Uvi:B?~
} 5|0}
} s'Wu \r'
private void fixUp(int k) { 7S]<?>*
while (k > 1) { 1'"TO5
int j = k >> 1; _[t:Vme}v
if (queue[j]>queue[k]) 7@uhw">mX
break; ?,0 a#lG
SortUtil.swap(queue,j,k); *$yU|,
k = j; 's_[#a;Vp
} @UCr`>
} ;fGh]i
] g]^^
} {f:%+h
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} '|rhm
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SortUtil： RJk42;]
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package org.rut.util.algorithm; Uon^z?0A
hWD%_"yhd
import org.rut.util.algorithm.support.BubbleSort; -b$m<\0*
import org.rut.util.algorithm.support.HeapSort; 4(D/~OG-6
import org.rut.util.algorithm.support.ImprovedMergeSort; rK} =<R
import org.rut.util.algorithm.support.ImprovedQuickSort; "';K$&,[
import org.rut.util.algorithm.support.InsertSort; *~SanL\
import org.rut.util.algorithm.support.MergeSort; Q.Xs%{B
import org.rut.util.algorithm.support.QuickSort; LZH~VkK@m}
import org.rut.util.algorithm.support.SelectionSort; 'K*. ?M
import org.rut.util.algorithm.support.ShellSort; ]L{diD2G
)]M,OMYq-
/** _-5|"oJ
* @author treeroot ]CxDm
* @since 2006-2-2 zSo(+D &[
* @version 1.0 U~1)a(Yu;
*/ ) o`ep{<t
public class SortUtil { 7w51UmO
public final static int INSERT = 1; P}8cSX9
public final static int BUBBLE = 2; R;3nL[{U
public final static int SELECTION = 3; ^bG91"0A
public final static int SHELL = 4; >7,?X_:A-1
public final static int QUICK = 5; 5-?*Boi>i
public final static int IMPROVED_QUICK = 6; My<.^~
public final static int MERGE = 7; 2D)B%nM[
public final static int IMPROVED_MERGE = 8; 'B yB1NL
public final static int HEAP = 9; #bCQEhCy
1=z6m7@'-
public static void sort(int[] data) { 4U>g0
sort(data, IMPROVED_QUICK); ^bk:g}o
} l#bE_PD;
private static String[] name={ BHNEP |=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MmQ"z_v
}; 7 F> a&r
K;j0cxl
private static Sort[] impl=new Sort[]{ ,4--3 MU
new InsertSort(), GW,RE\Q:
new BubbleSort(), <\`qRz0/
new SelectionSort(), "el}9OitC
new ShellSort(), F_-}GN%
new QuickSort(), Xb2.t^ ]f
new ImprovedQuickSort(), 7.FD16
new MergeSort(), _?v&\j
new ImprovedMergeSort(), 7&&3@96<*#
new HeapSort() tE WolO[\
}; 7A"v:e
z9Nial`p
public static String toString(int algorithm){ <%?!3 n*
return name[algorithm-1]; G3dA`3
} 4t,f$zk
_qa9wK/
public static void sort(int[] data, int algorithm) { Z;~7L*|
impl[algorithm-1].sort(data); S\L^ZH?[2
} :Lu 9w0>f
#5%ipWPHb
public static interface Sort { O;+ sAt
public void sort(int[] data); U%)-_ *`z
} =*{Ii]D
~@mNR^W-W
public static void swap(int[] data, int i, int j) { 1+9!W
int temp = data; ]FEDAGu
data = data[j]; }'`}| pM$
data[j] = temp; 3/V0w|ZgD
} |.;*,bb|3
} t?wVh0gT