[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; {E3329t|'
} ]+)cXJ}6#
int i1=l; p$+.]
int i2=mid+1; jb'AOs
for(int cur=l;cur<=r;cur++){ m|8ljXX
if(i1==mid+1) tUrwg
data[cur]=temp[i2++]; ^6?)EM#
else if(i2>r) bAkCk]>5
data[cur]=temp[i1++]; Osj/={7g
else if(temp[i1] data[cur]=temp[i1++]; $TK<~3`
else %9HL"
data[cur]=temp[i2++]; H6Dw5vG"l
} wVMR&R<t
} &X%vp?p
id=:J7!QU
} o 00(\ -eb
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改进后的归并排序: #y2IHO-
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package org.rut.util.algorithm.support; ~MZEAY9
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import org.rut.util.algorithm.SortUtil; PQJI~u9te}
!h[xeLlU
/** NW AT"
* @author treeroot #l<un<
* @since 2006-2-2 M7x*LiKc2
* @version 1.0 Q.zE}ZS
*/ ^v+3qm@,
public class ImprovedMergeSort implements SortUtil.Sort { (h$[g"8
_f1~r^(/T0
private static final int THRESHOLD = 10; !STa}wl
KbicP<
/* MjrI0@R
* (non-Javadoc) -l2aAK1M
* &'{?Y;A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !YZ$WiPl
*/ iI 4XM>`a
public void sort(int[] data) { ~;ZT<eCIA
int[] temp=new int[data.length]; 5k]xi)%
mergeSort(data,temp,0,data.length-1); CA8N
} (t%+Z"j
"%[aWb
private void mergeSort(int[] data, int[] temp, int l, int r) { q8-*3K
int i, j, k; NBaXfWh
int mid = (l + r) / 2; -Rcl(Q}LZ
if (l == r) 8F(Vd99I
return; 48p< ~#<W\
if ((mid - l) >= THRESHOLD) |(Q !$
mergeSort(data, temp, l, mid); "eOFp\vPr
else W%,h{
insertSort(data, l, mid - l + 1); 6f^q >YP
if ((r - mid) > THRESHOLD) 16Gp nb
mergeSort(data, temp, mid + 1, r); 78n`VmH~L
else o+F]80CH
insertSort(data, mid + 1, r - mid); K2gg"#ft?
WN`|5"?$
for (i = l; i <= mid; i++) { KvtX>3#qM
temp = data; oD?c]}3
} )(`HEl>-9c
for (j = 1; j <= r - mid; j++) { Z7:TPY$b
temp[r - j + 1] = data[j + mid]; S#g=;hD
} {=A8kgt
int a = temp[l]; GDBxciv
int b = temp[r]; XaH%i~}3
for (i = l, j = r, k = l; k <= r; k++) { ;c;5O@R}3
if (a < b) { rV6SN.
data[k] = temp[i++]; GL-r;
a = temp; KH_~DZU*5
} else { L,PD4H"8
data[k] = temp[j--]; W2-1oS~ma
b = temp[j]; w>6~ zAh
} H}}g\|r&
} w]Byl3}Gt
} N{o3w.g
q\q8xF~[p
/** 2F- ]0kGR|
* @param data v5Qp[O_
* @param l yL.Z{wd
* @param i %V2A}78
*/ i*9Bu;
private void insertSort(int[] data, int start, int len) { @Fs2J_v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AQR/nWwx
} %M KZ':m
} hantGw|
} J=@D]I*3
} H1^m>4ll9
B!X;T9^d
堆排序： "T+oXK\B
y^xEZD1X6-
package org.rut.util.algorithm.support; ;kv/(veQ1<
YKtF)N;m]
import org.rut.util.algorithm.SortUtil; IA&NMf;{
3|qT.QR`Z
/** {6, l#z
* @author treeroot AIK99
* @since 2006-2-2 M,V~oc5
* @version 1.0 {~u#.(
*/ 2$OI(7b=
public class HeapSort implements SortUtil.Sort{ DE659=Tq
o:x,zfW
/* (non-Javadoc) >3\($<YDZM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qY^@^)b[
*/ Mb0l*'ZF
public void sort(int[] data) { ^}>Ie03m50
MaxHeap h=new MaxHeap(); d=J$H<
h.init(data); S(nZ]QEG
for(int i=0;i h.remove(); ,KO_h{mI<
System.arraycopy(h.queue,1,data,0,data.length); R<-u`uXnP
} w,/&oe5M+
njoU0f1`
private static class MaxHeap{ L UitY
%DqPRl.Gu
void init(int[] data){ (}jYi*B
this.queue=new int[data.length+1]; U0Q:sA U
for(int i=0;i queue[++size]=data; Kx[u9MD
fixUp(size); yi-S^
} FR%u1fi
} >^\}"dEvr
U!xOJ
private int size=0; <R%]9#re
s'Op|`&X
private int[] queue; %8N=4vTJ
=^L?Sgg
public int get() { _U%fD|t
return queue[1]; [LcHO] _^M
} :fW\!o8Z2
qwz_.=5E6
public void remove() { 3$E\B=7/U
SortUtil.swap(queue,1,size--); p~h)@
fixDown(1); &-s/F`
} @mbR I0
file://fixdown vxmz3ht,Q
private void fixDown(int k) { 9N?BWv}
int j; `z?6.+C
while ((j = k << 1) <= size) { liuF;*
if (j < size %26amp;%26amp; queue[j] j++; $cUTe
if (queue[k]>queue[j]) file://不用交换 HU='Hk!
break; uBPxMwohR
SortUtil.swap(queue,j,k); #UO#kC<2(B
k = j; w&F/P]1
} %I&[:
} iTgv8
private void fixUp(int k) { fT&>L
while (k > 1) { .gPXW=r
int j = k >> 1; Z6Owxqfht
if (queue[j]>queue[k]) 0VOj,)K=
break; H+VKWGmfG
SortUtil.swap(queue,j,k); @H?_x/qBT
k = j; ATdK)gG
} f"8!uE*;
} &;D(VdSr9
pu"`*NL
} 3*DwXH+
)kq3q5*_
} ]B;\?Tim
5tIM@,.I/
SortUtil： ?2#v`Z=L;
e>:bV7h j~
package org.rut.util.algorithm; $h({x~Oj9
NvZ )zE
import org.rut.util.algorithm.support.BubbleSort; ,s?7EHtC
import org.rut.util.algorithm.support.HeapSort; h7EKb-@
import org.rut.util.algorithm.support.ImprovedMergeSort; Mk*&CNo3
import org.rut.util.algorithm.support.ImprovedQuickSort; 6__#n`
import org.rut.util.algorithm.support.InsertSort; 1b6ox6
import org.rut.util.algorithm.support.MergeSort; |+^-b}0
import org.rut.util.algorithm.support.QuickSort; 6+:Tv2
import org.rut.util.algorithm.support.SelectionSort; ~"Pu6-\VT
import org.rut.util.algorithm.support.ShellSort; f-V8/
(Oc[j{6q
/** Mbt}G|;8H7
* @author treeroot @Gs*y1
* @since 2006-2-2 m]1=o7
* @version 1.0 Dn6k,nVh
*/ Qo4+=^(
public class SortUtil { 09f:%!^u
public final static int INSERT = 1; Pgy&/-u
public final static int BUBBLE = 2; N@M(Iw
public final static int SELECTION = 3; _d8k[HAJ|
public final static int SHELL = 4; reyN5n~4U
public final static int QUICK = 5; X[frL)k]
public final static int IMPROVED_QUICK = 6; Q9lw~"
public final static int MERGE = 7; CvCk#:@HM
public final static int IMPROVED_MERGE = 8; h\ (z!7t*
public final static int HEAP = 9; )C @W_cfMN
"d a%@Zy
public static void sort(int[] data) { :qV}v2
sort(data, IMPROVED_QUICK); t|gEMDGa3
} _]"5]c&*3
private static String[] name={ @#T*OH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TzXivE@mm
}; ~RQ6DG^
oKIry 8'^N
private static Sort[] impl=new Sort[]{ HevS}L
new InsertSort(), IT,TSs/Y
new BubbleSort(), 73$^y)AvY
new SelectionSort(), ^A8'YTl
new ShellSort(), XE_|H1&j
new QuickSort(), dbTPY`
new ImprovedQuickSort(), KzeTf?G
new MergeSort(), v;S7i>\
new ImprovedMergeSort(), &qki NS
new HeapSort() XEF|B--,
}; m*L*# ZBS
fF208A7U I
public static String toString(int algorithm){ ~X^L3=!vf
return name[algorithm-1]; )bZS0f-
} \UI7H1XDH
O:fv1
public static void sort(int[] data, int algorithm) { Zx(VwB2
impl[algorithm-1].sort(data); i,R<`K0
} )v1n#m,W
/TTmMx*
public static interface Sort { Cf`s:A5<J
public void sort(int[] data); =6b^j]1
} ?[Od.
o5gt`H"
public static void swap(int[] data, int i, int j) { sQrP,:=r#
int temp = data; f&glY`s#
data = data[j]; *TY?*H
data[j] = temp; 1hj']#vBu
} ]}2+yK
} ^PIUA'