[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; QgH{J80
} ekfa"X_
int i1=l; ^Rl?)_)1HE
int i2=mid+1; i\Yd_
for(int cur=l;cur<=r;cur++){ %q r,Ssa/
if(i1==mid+1) 5mVO9Qj
data[cur]=temp[i2++]; jB9~'>JY
else if(i2>r) &B:L9^
data[cur]=temp[i1++]; rpEIDhHv
else if(temp[i1] data[cur]=temp[i1++]; 2T%sHp~qt
else e6J>qwD?
data[cur]=temp[i2++]; 3bd`q $
} w&}<b%l
} ,;MUXCC'
N DI4EA~z
} Q<szH1-
,d!@5d&Zi
改进后的归并排序: irw5<l
82)=#ye_P
package org.rut.util.algorithm.support; |ggtb\W
VNz?e&>
import org.rut.util.algorithm.SortUtil; _ZJQE>]nWu
Nz"K`C>/
/** %c$|.TkX
* @author treeroot 2>.b~q@
* @since 2006-2-2 ~T9QpL1OJ
* @version 1.0 q|klsup
*/ K)1Lg?j
public class ImprovedMergeSort implements SortUtil.Sort { aox@- jyr
TWRnty-C
private static final int THRESHOLD = 10; u"T9w]Z\
<tO@dI$~>
/* 1DU l<&4
* (non-Javadoc) GM8>u O
* {&Rz>JK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `X()"Qw
*/ 2u0B=0x
public void sort(int[] data) { ETX>wZ
int[] temp=new int[data.length]; AL&<SxuP
mergeSort(data,temp,0,data.length-1); 1f"}]MbLR
} Gys-Im6>~@
G.N`
private void mergeSort(int[] data, int[] temp, int l, int r) { uARkf'
int i, j, k; N*PJ m6-
int mid = (l + r) / 2; d@8:f
if (l == r) vN]_/T+
return; R:'&>.AUw
if ((mid - l) >= THRESHOLD) D5Jg(-
mergeSort(data, temp, l, mid); V2;Nv\J\
else xU{0rM"
insertSort(data, l, mid - l + 1); ,'<NyA><
if ((r - mid) > THRESHOLD) 4QPHT#eqX
mergeSort(data, temp, mid + 1, r); >#;_Ebl@
else 2w~Vb0
insertSort(data, mid + 1, r - mid); 8"LM:0x
[EVyCIcY,h
for (i = l; i <= mid; i++) { C>-}BeY!
temp = data; 5yJ~ q
} J?E!\V&U
for (j = 1; j <= r - mid; j++) { ^%6f%]_
temp[r - j + 1] = data[j + mid]; QYj 4D
} sVnq|[ /
int a = temp[l]; W<O/LHKHdn
int b = temp[r]; <Vh5`-J
for (i = l, j = r, k = l; k <= r; k++) { <Nloh+n=
if (a < b) { t"~X6o|R
data[k] = temp[i++]; 1 K^-tms
a = temp; {65YTt%
} else { G7GKO
data[k] = temp[j--]; ZOppec1D
b = temp[j]; 64y9.PY
} cdI"=B+C\
} &P*r66
} Dl\0xcE
-EU=R_yg
/** )\W}&9 >
* @param data 6Y.k<oem
* @param l hr&UD|E=
* @param i "cOBEhn%l
*/ vZ6R>f
private void insertSort(int[] data, int start, int len) { P $r!u%W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J!Rqm!)q
} LR4W
} f*m^x7
} I;<__
} l4I',79l
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堆排序： 3EA_-?
OzxiT +
package org.rut.util.algorithm.support; Un+- T
w8KxEV=
import org.rut.util.algorithm.SortUtil; qM>Dt
W3X;c*j
/** or)fx/%h
* @author treeroot |\C.il7
* @since 2006-2-2 ,W]}mqV%.'
* @version 1.0 h7xgLe@
*/ h-m0Ro?6
public class HeapSort implements SortUtil.Sort{ b$*G&d5
Jcp=<z*0
/* (non-Javadoc) 20A:,pMb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .Rb4zLYL*w
*/ ~jWpD7px
public void sort(int[] data) { UU#$Kt*frR
MaxHeap h=new MaxHeap(); }$@K
h.init(data); e&mTaCLG
for(int i=0;i h.remove(); @ L/i
System.arraycopy(h.queue,1,data,0,data.length); -H5-6w$
} #TgP:t]p
+\vN#xDz
private static class MaxHeap{ $ Fy)+<
Sx_j`Cgy
void init(int[] data){ n@oSLo`k,`
this.queue=new int[data.length+1]; ~(cqFf
for(int i=0;i queue[++size]=data; u b@'(*
fixUp(size); 0zjGL7
} E /ycPqD
} 7=A @P
tg~7^(s
private int size=0; )_l(WF.
'E\qqE[;
private int[] queue; tK\$LZ
(+TL ]9P
public int get() { ?J"Y4,{
return queue[1]; `K2vG`c
} fKs3H?|
CZCVC (/u
public void remove() { 2\Yv;J+;
SortUtil.swap(queue,1,size--); |fn%!d`2
fixDown(1); U71A#OD^U
} L[:M[,?=`
file://fixdown .4=A:9
private void fixDown(int k) { d%1Vby
int j; 6x@]b>W
while ((j = k << 1) <= size) { c[?&;# feV
if (j < size %26amp;%26amp; queue[j] j++; 1fh6A`c
if (queue[k]>queue[j]) file://不用交换 u/`x@u
break; Ap}`Q(.
SortUtil.swap(queue,j,k); _`9WNJiL
k = j; uVw|jj
} S.owVMQ
} <FvljKuq+
private void fixUp(int k) { 8KzH -
while (k > 1) { _<)HFg6
int j = k >> 1; =?hbi]
if (queue[j]>queue[k]) H|cxy?iJ
break; 1a#R7chl
SortUtil.swap(queue,j,k); ve*6WDK,H
k = j; )U2%kmt
} Z1DF)
} &Qv%~dvW
sDy~<$l?
} Nw3IDy~T
mZ#IP
} NV3oJ0f&2
#@L<<Q8}
SortUtil： &y7~
dQAo~]B
package org.rut.util.algorithm; M[&p[P@
2AjP2
import org.rut.util.algorithm.support.BubbleSort; x=44ITe1n[
import org.rut.util.algorithm.support.HeapSort; p"NuR4
import org.rut.util.algorithm.support.ImprovedMergeSort; ;BEX|wxn
import org.rut.util.algorithm.support.ImprovedQuickSort; }An;)!>(nF
import org.rut.util.algorithm.support.InsertSort; Olq`mlsK
import org.rut.util.algorithm.support.MergeSort; liH1r1M
import org.rut.util.algorithm.support.QuickSort; p/jAr+XM
import org.rut.util.algorithm.support.SelectionSort; 9Cw !<
import org.rut.util.algorithm.support.ShellSort; v/G^yZa
??Dv\yLZI
/** Ozc9yy!%
* @author treeroot ze#ncnMo
* @since 2006-2-2 M`@Es#s
* @version 1.0 V8z*mnD
*/ {?uswbk.
public class SortUtil { ^}hSsE
public final static int INSERT = 1; x1QL!MB
public final static int BUBBLE = 2; Ua>.k|>0
public final static int SELECTION = 3; $K!6T
public final static int SHELL = 4; 3WY:Fn+#
public final static int QUICK = 5; R #m1Aa
public final static int IMPROVED_QUICK = 6; FHZQyO<|
public final static int MERGE = 7; <Ow+LJWQK
public final static int IMPROVED_MERGE = 8; NJ!}(=1|K
public final static int HEAP = 9; 9CHn6 v ~)
P6 mDwR
public static void sort(int[] data) { W o$UV
sort(data, IMPROVED_QUICK); El3Ayd3
} i&,1
private static String[] name={ /C[XC7^4'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N|s8PIcSp
}; x@<!#d+
l65Qk2<YC
private static Sort[] impl=new Sort[]{ t?_{
new InsertSort(), O>arCr=H
new BubbleSort(), fH;lh-
new SelectionSort(), Oat #%
new ShellSort(), D?9EO=
new QuickSort(), @|Hx>|p
new ImprovedQuickSort(), 8BM[c;-{g`
new MergeSort(), o%73M!-
new ImprovedMergeSort(), <+; cgF!+
new HeapSort() 78u=Jz6
}; *(Us:*$W.
U,^jN|v
public static String toString(int algorithm){ 'J#uD|9)
return name[algorithm-1]; |>=\ VX17
} _zFJ]7Ym.)
ut9R]01:
public static void sort(int[] data, int algorithm) { .h;X5q1
impl[algorithm-1].sort(data); <p8>"~R
} (I(k$g[>
Y@V6/D} 1
public static interface Sort { uBBW2
public void sort(int[] data); _jrkR n1"
} 4fdO Ow
x9H qc9q
public static void swap(int[] data, int i, int j) { Gjf1Ba
int temp = data; %{";RfSVX%
data = data[j]; Y t0s
data[j] = temp; ;i;;{j@$i
} |#(g8ua7
} L~L]MC&