[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; 36.L1!d)pE
} =U3!D;XP
int i1=l; " c}pY^(
int i2=mid+1; %6dFACv
for(int cur=l;cur<=r;cur++){ ;l+3l ez
if(i1==mid+1) c7P"1
data[cur]=temp[i2++]; [%z~0\lu8
else if(i2>r) P\N$TYeH
data[cur]=temp[i1++]; tAc[r)xFw
else if(temp[i1] data[cur]=temp[i1++]; ZuILDevMD
else C$ nT&06o
data[cur]=temp[i2++]; F8>Fp"
} j$Gb>Ex>
} MS><7lk-
VO[s:e9L
} 3*XX@>|o
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改进后的归并排序: (fb&5=Wzw
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package org.rut.util.algorithm.support; 4vGkgH<,
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import org.rut.util.algorithm.SortUtil; 9`QWqu[
OBl-6W
/** H2|&
* @author treeroot Y0aO/6
* @since 2006-2-2 l`fjz-eE
* @version 1.0 h#'(UZ
*/ 1}BW
public class ImprovedMergeSort implements SortUtil.Sort { F;5.nKo
}3 RqaIY}
private static final int THRESHOLD = 10; %/-Z1Nv*#
>*B/Wy
/* }4 5|
* (non-Javadoc) lLyMm8E%pZ
* doVBVTk^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~z%K9YcyU
*/ IWsB$T
public void sort(int[] data) { %Mz(G-I.\
int[] temp=new int[data.length]; `A$yF38!
mergeSort(data,temp,0,data.length-1); dX,2cK[aG
} ub0]nov
$kvF]|<bu
private void mergeSort(int[] data, int[] temp, int l, int r) { Vb|DNl@
int i, j, k; ld$LG6[PA
int mid = (l + r) / 2; a~DR$^m
if (l == r) N-4LdC
return; uXNJ{]o
if ((mid - l) >= THRESHOLD) 0;} 9XZ
mergeSort(data, temp, l, mid); tWdj"n%
else Vv0dBFe
insertSort(data, l, mid - l + 1); _(TavL>l =
if ((r - mid) > THRESHOLD) 2< w/GX.
mergeSort(data, temp, mid + 1, r); T/dchWG
else f[!N]*
insertSort(data, mid + 1, r - mid); &tkkn2t
Z"] ben
for (i = l; i <= mid; i++) { WDWb7
temp = data; j'#W)dp(
} 9)3ok#pQ/
for (j = 1; j <= r - mid; j++) { ;WO/xA-#
temp[r - j + 1] = data[j + mid]; )CYSU(YTD
} rwv_ RN
int a = temp[l]; 2.Th29]
int b = temp[r]; tB8XnO_c
for (i = l, j = r, k = l; k <= r; k++) { K q: +{'
if (a < b) { }<9*eAn`
data[k] = temp[i++]; t8E'd:pE
a = temp; 6 80i?=z
} else { `6?r.;wj
data[k] = temp[j--]; n$F&gx'^
b = temp[j]; '9H7I! L@
} \[%[`m
} /}]X3ng
} QjVP]C}p
@;"HslU\Q
/** O}*[@uv/
* @param data xT#j-T
* @param l %j^[%&pT
* @param i @G~T&6E!
*/ .3Jggp
private void insertSort(int[] data, int start, int len) { wk<QYLEk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dNB56E)5`J
} JGHQ_AI
} M#IGq
} zQV$!%qR
} *.8@hPy
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堆排序： ]<WKi=
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package org.rut.util.algorithm.support; W+Z] Y
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import org.rut.util.algorithm.SortUtil; Ha)eeE$
bu1O<*
/** MR:Co4(
* @author treeroot 9mIq9rQ|*
* @since 2006-2-2 w3a`G|
* @version 1.0 w[qWr@
*/ hvnZ 2x.?d
public class HeapSort implements SortUtil.Sort{ RM|<(kq
>t.2!Z_RQ
/* (non-Javadoc) ~raRIh=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ygW,4Vz7J
*/ Mmq{]q~At
public void sort(int[] data) { Ie`kzssM
MaxHeap h=new MaxHeap(); 3gQQ,V..
h.init(data); _8)9I?jH
for(int i=0;i h.remove(); P#Z$+&)b)s
System.arraycopy(h.queue,1,data,0,data.length); lBvQ?CJ<y
} .ZJt
sF:3|Yy0
private static class MaxHeap{ ZXsm9
x\)0+c~\}x
void init(int[] data){ KA#4iu{
this.queue=new int[data.length+1]; M~t S *
for(int i=0;i queue[++size]=data; B<T wTv
fixUp(size); O%AQ'['
} 3b (I~
} 79AOvh
M\BLuD
private int size=0; hR Y*WL
>j{phZ
private int[] queue; DB-4S-2
$5z O=`
public int get() { x>8=CiUE
return queue[1]; 9He>F7J:p'
} .h-:)e*
)f>s\T
public void remove() { zjs@7LN
SortUtil.swap(queue,1,size--); Ev|2bk \
fixDown(1); mWZoo/xtT
} Fyrr,#
file://fixdown +e. bO5Y
private void fixDown(int k) { _fz-fG 1
int j; M$dDExd~
while ((j = k << 1) <= size) { v4kk4}lE
if (j < size %26amp;%26amp; queue[j] j++; r3<yG"J86
if (queue[k]>queue[j]) file://不用交换 *IJctYJaX
break; <\|f;7/
SortUtil.swap(queue,j,k); ZY-W~p1:G
k = j; ,~w)~fMb8
} x3xBl_t
} s de|t
private void fixUp(int k) { O:"gJ4D
while (k > 1) { ;]34l."85
int j = k >> 1; &ok2Xw
if (queue[j]>queue[k]) a*o#,T5A
break; }@_F( B
SortUtil.swap(queue,j,k); Ouc=4'$-
k = j; EtK,C~C}8
} W! v8'T
} H.qp~-n
=ltT6of@o
} ]e@'9`G-'
P(8zJk6h),
} %,Xs[[?i
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SortUtil： *aT3L#0(
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package org.rut.util.algorithm; ?u{y[pI6
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import org.rut.util.algorithm.support.BubbleSort; Ho9 a#9
import org.rut.util.algorithm.support.HeapSort; X!V@jo9?
import org.rut.util.algorithm.support.ImprovedMergeSort; SxcNr5F
import org.rut.util.algorithm.support.ImprovedQuickSort; n,SDJsS^
import org.rut.util.algorithm.support.InsertSort; JL45!+
import org.rut.util.algorithm.support.MergeSort; (dvCejc^p
import org.rut.util.algorithm.support.QuickSort; "l6v[yv
import org.rut.util.algorithm.support.SelectionSort; xG@zy4
import org.rut.util.algorithm.support.ShellSort; [vV]lWOp'
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/** dp\pkx7
* @author treeroot M^DYzJ
* @since 2006-2-2 =t\HtAXn[
* @version 1.0 $q);xs
*/ +K,]#$k
public class SortUtil { xH#R_
public final static int INSERT = 1; usnbGkq
public final static int BUBBLE = 2; IFYGl
public final static int SELECTION = 3; G]X72R?g
public final static int SHELL = 4; QL%&b\K
public final static int QUICK = 5; &$ZJfHD@
public final static int IMPROVED_QUICK = 6; ,E2Tw-%
public final static int MERGE = 7; ORHs1/L`j
public final static int IMPROVED_MERGE = 8; yPL1(i;
public final static int HEAP = 9; DS0c0lsx
BR*,E~%
public static void sort(int[] data) { Z;`ts/?SY]
sort(data, IMPROVED_QUICK); eD5.*O
} {0 d/;
private static String[] name={ cl:h'aG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .I_Mmaq;i
}; *P]FX-D3
|{]W (/
private static Sort[] impl=new Sort[]{ `2Rd=M]?
new InsertSort(), U<QO@5
new BubbleSort(), U0G(
new SelectionSort(), (+lwt
new ShellSort(), qKag'0e
new QuickSort(), >J,Rx!fq3
new ImprovedQuickSort(), ")LcB'C
new MergeSort(), RGvfy/T
new ImprovedMergeSort(), [Zc8tE2oN
new HeapSort() U[1Rw6
}; Ze_4MwCW
w'E&w)Z]
public static String toString(int algorithm){ S)ZcH
return name[algorithm-1]; h3U| ~h
} Ry9kGdqO
CmKbpN*
public static void sort(int[] data, int algorithm) { |X@ZM
impl[algorithm-1].sort(data); LPO:Ka
} ZqH.$nXP
f*U3s N^y
public static interface Sort { %>u(UmFO
public void sort(int[] data); o|FjNL
} U7i WYdt$
Hz39v44
public static void swap(int[] data, int i, int j) { AlF"1X02
int temp = data; Q |,(C0<G
data = data[j]; =wbgZr^2
data[j] = temp; 8>Az<EF^=#
} P]w5`aBM
} "X<vgM^: