[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; !y$##PZ
} ,~cK]!:>s
int i1=l; g#i~^4-1
int i2=mid+1; sq=EL+=j
for(int cur=l;cur<=r;cur++){ A!GvfmzqIn
if(i1==mid+1) KGOhoiR9:C
data[cur]=temp[i2++]; GDCp@%xW
else if(i2>r) cS Lj\'`b
data[cur]=temp[i1++]; rL\}>VC)
else if(temp[i1] data[cur]=temp[i1++]; EPW4 h/I
else s YTJ^Kd
data[cur]=temp[i2++]; Z4G%Ve[
} }eSy]r[J
} egsP\ '
9wCgJ$te
} UA'bE~i
a)W|gx6Y
改进后的归并排序: ^nZ=B>Yn2
o;wSG81
package org.rut.util.algorithm.support; TNh&g.
`<>#;%
import org.rut.util.algorithm.SortUtil; 0(d!w*RpG
V(kK2az
/** >3g`6d
* @author treeroot _t,aPowX
* @since 2006-2-2 gm5%X'XL
* @version 1.0 f'ld6jt|%
*/ W2h*t"5W
public class ImprovedMergeSort implements SortUtil.Sort { }{+?>!qDt
Uy=yA
private static final int THRESHOLD = 10; O:I]v@
)}$rgYKJ
/* 8Mtd}{Fw*
* (non-Javadoc) $-^&AKc
* t0cS.hi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vy2<'V*y}
*/ Wk^{Tn/]
public void sort(int[] data) { kReZch}
int[] temp=new int[data.length]; B!<B7Q
mergeSort(data,temp,0,data.length-1); 5G6 Pp7[
} A]Hz?i
|63uoRr
private void mergeSort(int[] data, int[] temp, int l, int r) { Q7pCF,;
int i, j, k; yU(}1ZID
int mid = (l + r) / 2; 1 39T*0C
if (l == r) C<C^7-5
return; Ax|'uvVAPT
if ((mid - l) >= THRESHOLD) ((AK7hb
mergeSort(data, temp, l, mid); UazK0{t<f
else GYy8kp84
insertSort(data, l, mid - l + 1); q%bFR[p<*
if ((r - mid) > THRESHOLD) l %zbx"%x
mergeSort(data, temp, mid + 1, r); \+Qd=,!i(
else g_PP9S_?
insertSort(data, mid + 1, r - mid); [V /f{y~{
5KbPpKpd
for (i = l; i <= mid; i++) { f@9XSZ<.71
temp = data; 731RqUR
} &B:L9^
for (j = 1; j <= r - mid; j++) { AEf[:]i]
temp[r - j + 1] = data[j + mid]; H!FaI(YZl
} RwK6u-u#9
int a = temp[l]; t?^!OJ:L
int b = temp[r]; eo;MFd%;
for (i = l, j = r, k = l; k <= r; k++) { $uwz`N:
if (a < b) { IuFr:3(
data[k] = temp[i++]; EBWM8~Nm#
a = temp; sJQ~:p0e
} else { g<DXJ7o
data[k] = temp[j--]; v 9G~i
b = temp[j]; uZf 6W<a
} i,;a( Sy4
} "tOm
} D@5h$m5
ZLVgK@l
/** ]p4?nT@]
* @param data >^W6'Q$P<
* @param l zSMM?g^T
* @param i <tO@dI$~>
*/ 1Xh@x
private void insertSort(int[] data, int start, int len) { v0!(&g3Sd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ETX>wZ
} y% !.:7Y
} [".94(qs
} 2S:B%cj9m
} 7On.y*
RV]QVA*i
堆排序： E@Ewx;P5
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package org.rut.util.algorithm.support; \Lbwfd=
Az(,Q$"|5
import org.rut.util.algorithm.SortUtil; @qWClr{`
-)&lsFF
/** -W/D Cj<
* @author treeroot aWvC-vZk
* @since 2006-2-2 qv2J0'd'.
* @version 1.0 cJSwA&
*/ I@Yk &aU
public class HeapSort implements SortUtil.Sort{ GVf[H2%H
xrlyph5mE
/* (non-Javadoc) <Vh5`-J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .'l3NV^{
*/ 8t7r^[T
public void sort(int[] data) { 9N2.:<so
MaxHeap h=new MaxHeap(); 0>;[EFL
h.init(data); A;^{%S
for(int i=0;i h.remove(); 8MU7|9 Q
System.arraycopy(h.queue,1,data,0,data.length); z)eNM}cF
} Dl\0xcE
gH"aMEC
private static class MaxHeap{ R+U*]5~R
fI.X5c>WK
void init(int[] data){ vZ6R>f
this.queue=new int[data.length+1]; P=E10
for(int i=0;i queue[++size]=data; nc.P
fixUp(size); Q/HEWk
} l r~>!O
} ,>kXn1 ,
sP9{tk2K
private int size=0; b ts*qx&)
zQGj,EAM}
private int[] queue; pJo4&Ff
ePSD#kY5
public int get() { ^g<Lu/5w
return queue[1]; :efDPNm5
} ,&@FToR
:^x,>(a
public void remove() { ~X;sa,)L1+
SortUtil.swap(queue,1,size--); ,6A/| K-
fixDown(1); "`pg+t&
} J|z' <W
file://fixdown I'<sJs*p
private void fixDown(int k) { V Kc`mE
int j; o 7V&HJ[
while ((j = k << 1) <= size) { cvpZF5mL]U
if (j < size %26amp;%26amp; queue[j] j++; )R@Y$*fm
if (queue[k]>queue[j]) file://不用交换 MGo`j:0
break; 6iEA._y
SortUtil.swap(queue,j,k); k6;pi=sYNW
k = j; I wu^@
} 'E\qqE[;
} u^L_XA
private void fixUp(int k) { E/d\ebX|
while (k > 1) { ,`$2
int j = k >> 1; GlT/JZ9
if (queue[j]>queue[k]) %nkbQ2^
break; +J !1z
SortUtil.swap(queue,j,k); ~}G#ys\1
k = j; (Q|Y*yI
} od3b,Q
} !:D,|k\m
!Ome;gS)
} S.owVMQ
Wk/Il^YG
} uD`Z\@Z
1| xKb(_l
SortUtil： 3TKl
G;AV~1i:~
package org.rut.util.algorithm; W6yz/{Rf
sDy~<$l?
import org.rut.util.algorithm.support.BubbleSort; ;:Y/"5h
import org.rut.util.algorithm.support.HeapSort; ^Ov+n1,)
import org.rut.util.algorithm.support.ImprovedMergeSort; K$ |!IXs
import org.rut.util.algorithm.support.ImprovedQuickSort; R9Y{kk0M
import org.rut.util.algorithm.support.InsertSort; GS!1K(7
import org.rut.util.algorithm.support.MergeSort; Wp=&nh
import org.rut.util.algorithm.support.QuickSort; p"NuR4
import org.rut.util.algorithm.support.SelectionSort; `6G:<wX
import org.rut.util.algorithm.support.ShellSort; `$r?^|T
">R`S<W
/** oeG?2!Zh
* @author treeroot bj+foNvu\
* @since 2006-2-2 xb^M33-y
* @version 1.0 K`cy97
*/ Q".p5(<
public class SortUtil { Qlhm:[
public final static int INSERT = 1; C2K<CDVw
public final static int BUBBLE = 2; 1++Fs
public final static int SELECTION = 3; au7@-_
public final static int SHELL = 4; bg,VK1
public final static int QUICK = 5; vg[zRWh8
public final static int IMPROVED_QUICK = 6; o){<PN|z
public final static int MERGE = 7; ;DI"9
public final static int IMPROVED_MERGE = 8; ?Q}3X-xy
public final static int HEAP = 9; !9=Y(rb
g);.".@"
public static void sort(int[] data) { l65Qk2<YC
sort(data, IMPROVED_QUICK); 259:@bi!y
} fH;lh-
private static String[] name={ !Y]%U @4}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !Ka~X!+\
}; _v=zFpR
hKFB=U
private static Sort[] impl=new Sort[]{ X\]Dx./
new InsertSort(), T`|>oX
new BubbleSort(), ]"\XTL0
new SelectionSort(), !o/;"'&E
new ShellSort(), P,SI0$Z
new QuickSort(), [E/^bM+
new ImprovedQuickSort(), { :_qa|
new MergeSort(), \AB*C_Ri
new ImprovedMergeSort(), ~2?UEv6
new HeapSort() DBzF\-
}; Ya,(J0l
Hbz,3{o5
public static String toString(int algorithm){ ;WsV.n
return name[algorithm-1]; / , .rUn1
} t)*A#
B7BikxUa
public static void sort(int[] data, int algorithm) { #Xd#Ncj
impl[algorithm-1].sort(data); C)qP9uW
} -*&C "%e
<<9Y=%C+
public static interface Sort { >oc&hT
public void sort(int[] data); .aqP=
} ),+u>Os&
Q##L|*Qy
public static void swap(int[] data, int i, int j) { >R8eAR$N
int temp = data; U-:_4[
data = data[j]; G@]|/kN1y
data[j] = temp; cdsF<tpy
} rlVo}kc7:
} cK+y3`.0