[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; H7;,Kr
} !-3;Qj}V
int i1=l; Y\B6c^E)
int i2=mid+1; $)o0{HsL+
for(int cur=l;cur<=r;cur++){ Mz2TwU_
if(i1==mid+1) JJbd h \
data[cur]=temp[i2++]; >8OY6wb
else if(i2>r) 5.&)hmpg
data[cur]=temp[i1++]; y1PyH
else if(temp[i1] data[cur]=temp[i1++]; G'-#99wv.
else HZWt>f
data[cur]=temp[i2++]; D^. c:
} =QtFJ9\
} `\\s%}vZ*T
Q{950$)L
} gSw<C+
zixG}'
改进后的归并排序: y'4Qt.1ukN
Q/0gd? U?
package org.rut.util.algorithm.support; 9oO~UP!ag
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import org.rut.util.algorithm.SortUtil; },JJ!3
7/QK"0
/** t? 6 et1~
* @author treeroot >jIn&s!}
* @since 2006-2-2 =IQ}Y_xr
* @version 1.0 BYM6cp+S
*/ {9V.l.Q
public class ImprovedMergeSort implements SortUtil.Sort { kVKAG\F
_]4p51r0
private static final int THRESHOLD = 10; pl1CPxSdO
0^o/cSF
/* jED.0,+K!
* (non-Javadoc) u|Mx}
* =|IlORf<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [{u3g4`}
*/ w@cW`PlF
public void sort(int[] data) { C]5 kQ1Og
int[] temp=new int[data.length]; kV?fie<\)
mergeSort(data,temp,0,data.length-1); #*_!Xc9f
} ^w~B]*A:"
?-mOAHW0q
private void mergeSort(int[] data, int[] temp, int l, int r) { !f52JQyh
int i, j, k; $'Mf$h
int mid = (l + r) / 2; ;2&"
if (l == r) +#BOWz
return; ^ `Ozw^~
if ((mid - l) >= THRESHOLD) Sm4BZF~!B
mergeSort(data, temp, l, mid); ]gcOMC
else \2a;z<(
insertSort(data, l, mid - l + 1); 8/dMvAB1So
if ((r - mid) > THRESHOLD) s[0`
mergeSort(data, temp, mid + 1, r); o&%v"#H2
else D0p*Sg
insertSort(data, mid + 1, r - mid); Q9O_>mZy
lm;hW&O9
for (i = l; i <= mid; i++) { a0sz$u
temp = data; !aF~5P7%
} TK\3mrEI
for (j = 1; j <= r - mid; j++) { ' :B;!3a0d
temp[r - j + 1] = data[j + mid]; -~~h1
} +@3+WD
int a = temp[l]; %wOkp`1-
int b = temp[r]; yFDeYPZP
for (i = l, j = r, k = l; k <= r; k++) { Z)E)-2U$@
if (a < b) { ,jis@]:
data[k] = temp[i++]; wT":
a = temp; a!:N C
} else { X=]utn
data[k] = temp[j--]; ~r8<|$;
b = temp[j]; 0@cIj ]
} pIcg+~
} qNj?Rwc
} 4y7_P0}:B
-]zb3P
/** qovsM M
* @param data = N*Jis
* @param l * CR#D}F
* @param i e c]kt'
*/ YQG l8E'
private void insertSort(int[] data, int start, int len) { \M\7k5$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); klm>/MXI`
} C&w0HoF
} MBA?, |9Q#
} 5>f"
} [%dsq`b#
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堆排序： sS}:Od
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package org.rut.util.algorithm.support; $Xlr@)%
!X-\;3kC0
import org.rut.util.algorithm.SortUtil; C'$}{%Cc@$
'A:Y&w"r
/** :\"0jQ.y|
* @author treeroot ^{MqJ\S7H
* @since 2006-2-2 JnBc@qnP6
* @version 1.0 nahq O|~
*/ AtCT
public class HeapSort implements SortUtil.Sort{ `3T=z{HR9g
*GE6zGdN
/* (non-Javadoc) }UW*[dCf>C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?{f6su@rW
*/ gE\ ^ vaB
public void sort(int[] data) { '1b 1N5~
MaxHeap h=new MaxHeap(); jC>ZMy8U)4
h.init(data); X13+n2^8]
for(int i=0;i h.remove(); 'M"z3j]m-,
System.arraycopy(h.queue,1,data,0,data.length); $"/l*H\h
} @r*GGI!
^ul1{
private static class MaxHeap{ wCLniCt
)Ac,F6w
void init(int[] data){ +S(# 7
this.queue=new int[data.length+1]; 3/n?g7B
for(int i=0;i queue[++size]=data; ?;W"=I*3
fixUp(size); o[!o+M
} .-rz30xT
} # `E
Cb{D[
private int size=0; m6e(Xk,)
:P_h_Tizv
private int[] queue; 8+oc4~!A@n
X^eyrqv
public int get() { Ljz)%y[s
return queue[1]; !FP ]
} (v/L
,Lp"Ia
public void remove() { _D4qnb@
SortUtil.swap(queue,1,size--); pE<a:2J
fixDown(1); .2@T|WD!Ah
} fL2P6N@
file://fixdown !ZUUn*e{5
private void fixDown(int k) { |(%<FY$
int j; t^":.}[Q
while ((j = k << 1) <= size) { D|ze0A@
if (j < size %26amp;%26amp; queue[j] j++; i;%G Z8
if (queue[k]>queue[j]) file://不用交换 !I?C8)
break; 2: gh q
SortUtil.swap(queue,j,k); -"nkC
k = j; )4uWB2ZRoi
} A2ye ^<-C.
} BGibBF^
private void fixUp(int k) { H I|a88
while (k > 1) { 7/<~s]D[%
int j = k >> 1; TzaeE
if (queue[j]>queue[k]) p+=zl`\=|
break; k(H]ILL
SortUtil.swap(queue,j,k); md{nHX&
k = j; K@1gK<,a
} S&UP;oc
} E6~VHQa2?
}~@/r5Zl
} Lf%3-P
n^[a}DX0
} V"4L=[le
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SortUtil： n+=qT$w)
$;Fx Zkp
package org.rut.util.algorithm; Xf&YcHo
X:Z3R0
import org.rut.util.algorithm.support.BubbleSort; p)B/(%
import org.rut.util.algorithm.support.HeapSort; "7%jv[
import org.rut.util.algorithm.support.ImprovedMergeSort; BT[|f[1
import org.rut.util.algorithm.support.ImprovedQuickSort; fu\j
import org.rut.util.algorithm.support.InsertSort; m@+v6&,
import org.rut.util.algorithm.support.MergeSort; GZaB z#U
import org.rut.util.algorithm.support.QuickSort; xbCR4upS
import org.rut.util.algorithm.support.SelectionSort; ||X3g"2W9
import org.rut.util.algorithm.support.ShellSort; V6dq8Z"h
Fj<*!J$,
/** l3b=8yn.
* @author treeroot h!SsIy(
* @since 2006-2-2 kNWTM%u9
* @version 1.0 'M6+(`x
*/ bI0xI[#Q
public class SortUtil { }F{s\qUt
public final static int INSERT = 1; Ox J0."
public final static int BUBBLE = 2; IWv5UmjN
public final static int SELECTION = 3; "W+>?u)
public final static int SHELL = 4; `$jun
public final static int QUICK = 5; vE(]!CB
public final static int IMPROVED_QUICK = 6; 7#j.yf4
public final static int MERGE = 7; $rW(*#C
public final static int IMPROVED_MERGE = 8; k ?KJ8
public final static int HEAP = 9; ( xooU 8d
=|AYT6z,
public static void sort(int[] data) { }d}sC\>U
sort(data, IMPROVED_QUICK); %N&.B
} [#Apd1S_
private static String[] name={ ,TWlg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _s@PL59,
}; (Nc~l ^a
xDw~n(*
private static Sort[] impl=new Sort[]{ m BvO<?ec
new InsertSort(), /Yi4j,8!|
new BubbleSort(), EoJ\Jk
new SelectionSort(), RP{0+
new ShellSort(), c?CfM>
new QuickSort(), rAP="H<
new ImprovedQuickSort(), c6i7f:'-0
new MergeSort(), v*Gd=\88
new ImprovedMergeSort(), >Du=(pB
new HeapSort() | U0s1f
}; >#:SJ?)`T
FW8Zpr!u
public static String toString(int algorithm){ (]cL5o9
return name[algorithm-1]; ( y!o
} HUjX[w8
1LS1 ZY
public static void sort(int[] data, int algorithm) { f$^wu~
impl[algorithm-1].sort(data); qZF&^pCF}
} b%MZfaU
/v9qrZ$$
public static interface Sort { PY_8*~Z
public void sort(int[] data); g|uyQhsg
} `>UUdv{C
>z%YKdq
public static void swap(int[] data, int i, int j) { }I uqB*g[t
int temp = data; }&/>v' G
data = data[j]; nxhlTf>3
data[j] = temp; :y7K3:d3
} :AlvWf$d
} !dwZ`D