[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; -}AAA*P
} OB.TAoH:
int i1=l; Sbc
int i2=mid+1; 6X$]d^)h{
for(int cur=l;cur<=r;cur++){ 2I3MV:5
if(i1==mid+1) pIXbr($
data[cur]=temp[i2++]; &O/;YGEAB
else if(i2>r) 5RrzRAxq
data[cur]=temp[i1++]; {r yv7G
else if(temp[i1] data[cur]=temp[i1++]; F\^9=}b_i
else A9`& Wnw?
data[cur]=temp[i2++]; :*4b,P
} PJ5~,4H-4
} vR[XbsNM
eG55[V<!
} h8iic
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改进后的归并排序: Y@)/iwq
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package org.rut.util.algorithm.support; zy^t95/m
F%Oy4*4
import org.rut.util.algorithm.SortUtil; __dSEOGoe
HRS^91aK
/** TmZsC5
* @author treeroot #&u9z5ywM
* @since 2006-2-2 ~4IkQ|,
* @version 1.0 o/I'Qi$v-
*/ mwU|Hh)N]
public class ImprovedMergeSort implements SortUtil.Sort { I.As{0cc
xn|M]E1)
private static final int THRESHOLD = 10; u*u3<YQ
n]{sBI3
/* YGFE(t;lPU
* (non-Javadoc) 1-JdQs6
* wl2P^Pj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~U"puEftbs
*/ 'b1k0 9'
public void sort(int[] data) { jiw5>RNt
int[] temp=new int[data.length]; .S4c<pMap
mergeSort(data,temp,0,data.length-1); .xG3`YH
} ~gZ"8frl
m ioNMDG
private void mergeSort(int[] data, int[] temp, int l, int r) { IP<]a5
int i, j, k; dA4DW
int mid = (l + r) / 2; p6P .I8g
if (l == r) X^Dklqqy
return; /<zBjvr%%
if ((mid - l) >= THRESHOLD) eI99itDQ
mergeSort(data, temp, l, mid); Q1hHK'3w
else +8p4\l$<`
insertSort(data, l, mid - l + 1); pSMF1Oy
if ((r - mid) > THRESHOLD) FLf< gz
mergeSort(data, temp, mid + 1, r); A<$~Q;r2a
else &=ZVU\o:
insertSort(data, mid + 1, r - mid); dZMf5=tb
`hpX97v
for (i = l; i <= mid; i++) { :xwyE(w
temp = data; 'LC-/_g
} 0o-.m
for (j = 1; j <= r - mid; j++) { u_31Db<
temp[r - j + 1] = data[j + mid]; oJ4OVfknD
} +hiskV@v
int a = temp[l]; ^W8kt
int b = temp[r]; zH)M,+P
for (i = l, j = r, k = l; k <= r; k++) { qK=uSLo\+
if (a < b) { nev@ykP6
data[k] = temp[i++]; o,(]w kF
a = temp; cl,\N\
} else { =o_Ua^mr
data[k] = temp[j--]; ;YGCsLT<xt
b = temp[j]; RV@'$`Q
} )SjhOvm
} -2DvKW$
} +wPXDN#R
u([|^~H]
/** tRC*@>I$
* @param data Dt]N&E#\D
* @param l A [c1E[
* @param i `PoFKtVXM
*/ Gn?NY}.S
private void insertSort(int[] data, int start, int len) { rm}%C(C{J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fi!BXngbd
} 'GyO
} PAYS~MnV@3
} ctk~}(1#
} Sj(5xa[
]0dj##5tJ
堆排序： ]wxjd l
azBYh*s=5{
package org.rut.util.algorithm.support; .dwy+BzS
e #!YdXSx
import org.rut.util.algorithm.SortUtil; GBg~NkC7.
C srxi'Pe
/** NpPuh9e{
* @author treeroot j-$F@p_2F
* @since 2006-2-2 `>1XL2
* @version 1.0 \img
*/ 'r0kX||
public class HeapSort implements SortUtil.Sort{ NB^+Hcb$
ojva~mnFf
/* (non-Javadoc) +`RQ^9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3u,CI!
*/ _Jt
public void sort(int[] data) { ~vPR9\e
MaxHeap h=new MaxHeap(); Tf*DFyr
h.init(data); ]Y.GU7`
for(int i=0;i h.remove(); zhdS6Gk+
System.arraycopy(h.queue,1,data,0,data.length); y&&%%3
} d YliC
u5Tu~
private static class MaxHeap{ T9'd?nw9
a +$'ULK+r
void init(int[] data){ P Y&(ObC
this.queue=new int[data.length+1]; iVSN>APe
for(int i=0;i queue[++size]=data; UE\Z]t!
fixUp(size); :w,#RcW
} !E@4^A80\W
} UURYK~$K:
`qs[a}%'>"
private int size=0; oE.59dx
a #`Y(R'
private int[] queue; G2y`yg
?h|&kRq
public int get() { 7TU(~]Z
return queue[1]; Abc%VRsT
} umo<9Y
,L&d\M"f
public void remove() { V] 0T P#
SortUtil.swap(queue,1,size--); Rp0`%}2 o
fixDown(1); x@LNjlP
} I<+i87=
file://fixdown EA``G8Vn>
private void fixDown(int k) { +bDBc?HZ{$
int j; 8\VP)<<
while ((j = k << 1) <= size) { ZJf:a}=h
if (j < size %26amp;%26amp; queue[j] j++; Z#NEa.]
if (queue[k]>queue[j]) file://不用交换 sS{!z@\Lf
break; 5Y4#aq
SortUtil.swap(queue,j,k); xf4CM,Z7(
k = j; =THRyZCH
} oAprM Z7Y
} MHqk-4Mz
private void fixUp(int k) { g-LMct8$
while (k > 1) { q|zips,
int j = k >> 1; vrq5 +K&||
if (queue[j]>queue[k]) +l27y0>t
break; vq` M]1]FO
SortUtil.swap(queue,j,k); +(U;+6 b
k = j; csjCXT=Ve
} ,CxIA^
} 90Bn}@t=Q
IgyoBfj\d
} 5q,ZH6\ {
s1>d)2lX
} "&%Lhyt
7U1^=Y@t}
SortUtil： -T=sY/O
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package org.rut.util.algorithm; &V(;zy4(R
#ZyY(S1.
import org.rut.util.algorithm.support.BubbleSort; Zg&o][T
import org.rut.util.algorithm.support.HeapSort; 6Z#$(oC
import org.rut.util.algorithm.support.ImprovedMergeSort; G0Y]-*1
import org.rut.util.algorithm.support.ImprovedQuickSort; f\vMdY
import org.rut.util.algorithm.support.InsertSort; b*)F7{/Z
import org.rut.util.algorithm.support.MergeSort; 3EV?=R
import org.rut.util.algorithm.support.QuickSort; 2|A?9aE%0
import org.rut.util.algorithm.support.SelectionSort; k?;@5r)y-
import org.rut.util.algorithm.support.ShellSort; M(U<H;Csk
4DgH/Yo
/** ]%2y`Jrl^W
* @author treeroot 6]|-%
* @since 2006-2-2 z'&tmje[?
* @version 1.0 U1;&G
*/ z7_h$v
public class SortUtil { \C<'2KZR,
public final static int INSERT = 1; 6L<QKE=
public final static int BUBBLE = 2; %Y-5L;MI
public final static int SELECTION = 3; e'A1%g)
public final static int SHELL = 4; #b9V&/ln
public final static int QUICK = 5; Mc~L%5
public final static int IMPROVED_QUICK = 6; 7 MS-Gs|
public final static int MERGE = 7; |,Kk#`lW<f
public final static int IMPROVED_MERGE = 8; :MihVLF
public final static int HEAP = 9; ~%L=<TBAc
43,baeG
public static void sort(int[] data) { ]^53Qbrv
sort(data, IMPROVED_QUICK); tGJJ|mle>
} |OiM(E(
private static String[] name={ 5)C`W]JE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &3$FkU^F6
}; j6WDh}#
\Mzr[dI
private static Sort[] impl=new Sort[]{ N4l}5(e
new InsertSort(), aTwBRm
new BubbleSort(), ]&OI.p
new SelectionSort(), *?pnTQs^
new ShellSort(), YYhN>d$
new QuickSort(), ue1g(;
new ImprovedQuickSort(), n0QHrIf{
new MergeSort(), b!<)x}-t>
new ImprovedMergeSort(), a+^,EY
new HeapSort() 9@8'*a{`m
}; z|8zNt Ug
VG_xNM
public static String toString(int algorithm){ }5AA}=
return name[algorithm-1]; BtrMv6
} @E4ya$A)F
Q`!^EyRA:^
public static void sort(int[] data, int algorithm) { ~t1?oJ
impl[algorithm-1].sort(data); DQ@M?~1hp
} EXsVZg"#
'cqY-64CJZ
public static interface Sort { SLz;5%CPV
public void sort(int[] data); P@5}}vwS
} lnGg1/
D*/fY=gK
public static void swap(int[] data, int i, int j) { g:s|D hE[
int temp = data; E/<n"'0ek
data = data[j]; \]0#jI/:
data[j] = temp; C;?<WtH
} \dbaY:(
} d;nk>6<|