[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; /|v:$iH,C
} YbjeM6#E
int i1=l; H~y 7o_tg
int i2=mid+1; ZtG5vdf
for(int cur=l;cur<=r;cur++){ }$EcNm$%
if(i1==mid+1) 1xAZ0X#
data[cur]=temp[i2++]; ?fF{M%i-%
else if(i2>r) '!Gnr[aR
data[cur]=temp[i1++]; H]>b<Cs
else if(temp[i1] data[cur]=temp[i1++]; Byq4PX%B
else svki=GD_(.
data[cur]=temp[i2++]; gQHE2$i>
} -OY[x|0
} mNUc g{+/
2pa: 3O
} TXx%\V_6
m<]b]FQ
改进后的归并排序: 96M?tTa
eTi r-7
package org.rut.util.algorithm.support; Ji%6/zV
n$>E'oG2t
import org.rut.util.algorithm.SortUtil; GMD>Ih.k:9
#IH7WaN
/** -?)` OHc^
* @author treeroot |4RuT .-o
* @since 2006-2-2 (W.euQy
* @version 1.0 XHq8p[F
*/ X2ShxD|
public class ImprovedMergeSort implements SortUtil.Sort { +Fu=9j/,j
i^hgs`hvU
private static final int THRESHOLD = 10; D#lx&J.s
ZUE?19GA
/* $'M:H_T
* (non-Javadoc) "b6ZAgxv
* OW$? 6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iM'{,~8R5
*/ |UbwPL_L
public void sort(int[] data) { q r12"H
int[] temp=new int[data.length]; Rxe sK
mergeSort(data,temp,0,data.length-1); ]A*v\Qy
} 5~WMb6/
M[9]t("
private void mergeSort(int[] data, int[] temp, int l, int r) { adEcIvN$
int i, j, k; ((BuBu>
int mid = (l + r) / 2; %trtP
if (l == r) [[fhfV+H
return; RU`m|<
if ((mid - l) >= THRESHOLD) FBfyW- 7
mergeSort(data, temp, l, mid); U4hsbraz
else 4qw&G
insertSort(data, l, mid - l + 1); J(&a,w>p
if ((r - mid) > THRESHOLD) z`b.~<P
mergeSort(data, temp, mid + 1, r); nLZT3`@~,
else <fY<.X
insertSort(data, mid + 1, r - mid); mtEE,O!+
a8fLj
for (i = l; i <= mid; i++) { BS}uv3
temp = data; WZ"g:Khw
} #vN\]e
for (j = 1; j <= r - mid; j++) { E|2klA^+*
temp[r - j + 1] = data[j + mid]; z_XI,u}
} XK:KWqW
int a = temp[l]; m9^?p
int b = temp[r]; dOY+| P\
for (i = l, j = r, k = l; k <= r; k++) { MmOGt!}9A
if (a < b) { D_E^%Ea&`
data[k] = temp[i++]; p-U'5<n
a = temp; Gq5)>'D?
} else { |L{<=NNs:D
data[k] = temp[j--]; i,/|H]Mzr
b = temp[j]; (tGK~!cAv
} l7 D/]&
} X~RET[L2
} 'Mjbvh4
`nMHuv
/** 1 sCF -r
* @param data ?Mp)F2'
* @param l DvnK_Q!
* @param i (JC -4X_
*/ ZMJ\C|S:
private void insertSort(int[] data, int start, int len) { jr"~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1N<)lZl)
} 2vKnxK+ 5
} r8C6bFYM
} )_EQU8D4ug
} #m9V)1"wB
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堆排序： ee&QZVL>
/B!"\0G/,
package org.rut.util.algorithm.support; f9u["e
iXC/? EK4
import org.rut.util.algorithm.SortUtil; ,K7C2PV6
9!V<=0b/
/** J.":oD
* @author treeroot a(Z" }m
* @since 2006-2-2 (FMGW (
* @version 1.0 xPqpNs-,
*/ 451C2 %y
public class HeapSort implements SortUtil.Sort{ @N.W#<IG
)@Xdr0
/* (non-Javadoc) ZvNXfC3Ia
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9>le-}~
*/ 8%7H F:
public void sort(int[] data) { 0*:]eM};P
MaxHeap h=new MaxHeap(); pM[UC{
h.init(data); NLb/Bja
for(int i=0;i h.remove(); Ltcr]T(Ic
System.arraycopy(h.queue,1,data,0,data.length); {b/60xl?
} c<JJuG
%8 cFzyE*
private static class MaxHeap{ _F^|n}Qbj
Q+G=f
void init(int[] data){ 3SQ 5C'E
this.queue=new int[data.length+1]; x)#k$QU
for(int i=0;i queue[++size]=data; biGaP#"0
fixUp(size); \ox:/-[c\<
} scL7PxJ5
} 2T?t[;-
RW>Z~Nj
private int size=0; ; @Gm@d
&;9<a^td
private int[] queue; `-ENKr]
>&?wo{b
public int get() { :Np&G4IM>
return queue[1]; ~n"V0!:'4
} s3kh (N
`p1`Sxz?
public void remove() { #C%<g:F8
SortUtil.swap(queue,1,size--); oL}FD !}
fixDown(1); WlZ[9,:p1
} y''?yr
file://fixdown Y!&dj95y
private void fixDown(int k) { HEe0dqG
int j; x6Z$lhZ
while ((j = k << 1) <= size) { *+p'CfsSka
if (j < size %26amp;%26amp; queue[j] j++; kV6>O C&^
if (queue[k]>queue[j]) file://不用交换 wK#UFOp
break; Mm.!$uR
SortUtil.swap(queue,j,k); ,PN>,hFL
k = j; %_tL}m{?
} ` S85i*
} 9@D,ZSi
private void fixUp(int k) { zP=J5qOZ8
while (k > 1) { 8-8= \
int j = k >> 1; d G:=tf&1R
if (queue[j]>queue[k]) m@HU;J\I
break; 8a?V h^
SortUtil.swap(queue,j,k); bJ. ((1$
k = j; J)g(Nw,O
} Za}91z"
} ZTS*E,U%
8KoPaq
} de ](l687I
2! wz#EC
} ;#xhlR* ~
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SortUtil： 3*arW|Xm
0W=IuPDU
package org.rut.util.algorithm; kV<VhBql!
f$WO{J
import org.rut.util.algorithm.support.BubbleSort; CtSAo\F
import org.rut.util.algorithm.support.HeapSort; Vl9\&EL
import org.rut.util.algorithm.support.ImprovedMergeSort; PVtQ&m$y
import org.rut.util.algorithm.support.ImprovedQuickSort; .+[[m$J
import org.rut.util.algorithm.support.InsertSort; HmX(=Y
import org.rut.util.algorithm.support.MergeSort; ;UPw;'
import org.rut.util.algorithm.support.QuickSort; _&w!JzpXT
import org.rut.util.algorithm.support.SelectionSort; 1uy+'2[Z-D
import org.rut.util.algorithm.support.ShellSort; <<;j=Yy({`
[9+M/O|Vs
/** 4L5Wa~5\
* @author treeroot ![Jxh,f
* @since 2006-2-2 *2@q=R-1
* @version 1.0 C8G['aQ
*/ =~HX/]zF
public class SortUtil { [;.zl1S<
public final static int INSERT = 1; z1]RwbA?1
public final static int BUBBLE = 2; D%50
public final static int SELECTION = 3; n7{c0;)$
public final static int SHELL = 4; +JQN=nTA
public final static int QUICK = 5; $fh?(J
public final static int IMPROVED_QUICK = 6; ,[Ytl
public final static int MERGE = 7; &$+yXN
public final static int IMPROVED_MERGE = 8; 1y?TyUP
public final static int HEAP = 9; Y,&)%Eo<
Z3#3xG5pl
public static void sort(int[] data) { "HYK~V
sort(data, IMPROVED_QUICK); 2'@0|k,yC
} 14^t{
private static String[] name={ Y+G4:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ul% q6=f)
}; TkQ05'Qc
3cOXtDV YT
private static Sort[] impl=new Sort[]{ *YDx6\><
new InsertSort(), }D|"$*
new BubbleSort(), :W'1Q2
new SelectionSort(), ^rxXAc[
new ShellSort(), LL,~&5{
new QuickSort(), v=X\@27= ?
new ImprovedQuickSort(), oHa6fi
new MergeSort(), a!>AhOk.
new ImprovedMergeSort(), 8\ :T*u3
new HeapSort() "kN5AeRg
}; q+m&V#FT%
}S42.f.p
public static String toString(int algorithm){ 7v\OS-
return name[algorithm-1]; )I5f`r=Ry
} a{)"KAP
]7br*t^zv
public static void sort(int[] data, int algorithm) { e j`lY
impl[algorithm-1].sort(data); ?.~@lE
} 3[Z?`X
/ ?Q@Pn
public static interface Sort { U1&m-K
public void sort(int[] data); %F{@DN`
} f:BW{Cij;y
WS,p}:yPZG
public static void swap(int[] data, int i, int j) { r\em-%:
int temp = data; _e?(Gs0BM
data = data[j]; ;>YJ}:r"\
data[j] = temp; sa*hoL18
} LL:B H,[
} U:IQWlC