[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; bl:a&<F
} ~cO?S2!W
int i1=l; 9}%~w(P
int i2=mid+1; |kBg8).B
for(int cur=l;cur<=r;cur++){ r)9i1rI+
if(i1==mid+1) _g^K$+F'}
data[cur]=temp[i2++]; CI~hmL0
else if(i2>r) wS F!Xx0
data[cur]=temp[i1++]; #K<=xP
else if(temp[i1] data[cur]=temp[i1++]; uZqu xu.
else qHC*$v#.V?
data[cur]=temp[i2++]; ?{@!!te@3v
} K%[}[.cW
} 1}n)J6m
%T&&x2p^=?
} uJ|5Ve
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改进后的归并排序: P\*2c*,W;
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package org.rut.util.algorithm.support; ]zhq.O >2{
3&a*]
import org.rut.util.algorithm.SortUtil; . T6_N
F'?5V0\he
/** @}zS/LO
* @author treeroot @,yFY
* @since 2006-2-2 D*d 3w
* @version 1.0 T(sG.%
*/ np'M4^E;
public class ImprovedMergeSort implements SortUtil.Sort { ;i-D~Np|
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private static final int THRESHOLD = 10; (04j4teE
>n$EeJ
/* NR;S3-Iq(
* (non-Javadoc) W{$+mow7S
* 43}&w.AS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TeGLAt
*/ bY"eC i{K
public void sort(int[] data) { @ @3)D%h
int[] temp=new int[data.length]; Ybn=Gy
mergeSort(data,temp,0,data.length-1); b]so9aCz
} eBYaq!t k
G8<It5CU
private void mergeSort(int[] data, int[] temp, int l, int r) { -+ IX[
int i, j, k; 3*2&Fw!B
int mid = (l + r) / 2; Ro3I/NI>
if (l == r) 1CS]~1Yp:
return; R^u^y{ohr
if ((mid - l) >= THRESHOLD) !Lg}q!*%>V
mergeSort(data, temp, l, mid); {6=H/g=:i
else JI[rIL\Ey
insertSort(data, l, mid - l + 1); PU@U@
if ((r - mid) > THRESHOLD) *{;A\sL
mergeSort(data, temp, mid + 1, r); d~z<,_r5c
else Fb<\(#t
insertSort(data, mid + 1, r - mid); K_lCDiqG
k>z-Zg
for (i = l; i <= mid; i++) { <8z[,X}bM
temp = data; si mX
} yS.fe[
for (j = 1; j <= r - mid; j++) { 2h? r![
temp[r - j + 1] = data[j + mid]; HU'`kimWb
} [%)B%h`XGf
int a = temp[l]; KbuGf$Bv
int b = temp[r]; gx>mKSzy
for (i = l, j = r, k = l; k <= r; k++) { 2G:{FY
if (a < b) { $RFu m'`5
data[k] = temp[i++]; G/RheH G
a = temp; <GFB'`L
} else { >G3J3P(
data[k] = temp[j--]; OTFu4"]M
b = temp[j]; Ci#5@Q9#w
} S>ylAU;N
} .pu`\BW>
} ~NW5+M(u
[2j(\vC!
/** H R!>g
* @param data ,IVr4#w0=
* @param l U-]PWt?C{
* @param i %},S#5L3
*/ PK`(qK9
private void insertSort(int[] data, int start, int len) { Xde=}9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r;6YCI=z
} 0R^(rE"2#
} VV}fW"_ND
} 4z3$
} I\4`90uBN
:c/=fWM%
堆排序： hjp?/i%TQ
y@8399;l
package org.rut.util.algorithm.support; 9q@YE_ji
(XIq?c1T
import org.rut.util.algorithm.SortUtil; #]\G*>{
yNMwd.r[
/** I3[RaZ2z{
* @author treeroot "?0G^zu
* @since 2006-2-2 xY}j8~k
* @version 1.0 ` Ehgn?6'
*/ }Yl8Q>t
public class HeapSort implements SortUtil.Sort{ "s6_lhu=E7
E~O>m8hF
/* (non-Javadoc) )I UWM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .N><yQ-j3'
*/ ^fiRRFr[
public void sort(int[] data) { ib=^tK
MaxHeap h=new MaxHeap(); {8p?we3l1
h.init(data); PH4bM
for(int i=0;i h.remove(); Qs[EA_
System.arraycopy(h.queue,1,data,0,data.length); om39;nk!}
} N*oJ$:#
pYvF}8
private static class MaxHeap{ waq_d.
8}`8lOE7
void init(int[] data){ .Fz6+m;Z
this.queue=new int[data.length+1]; U[ O!&:6
for(int i=0;i queue[++size]=data; sL`D}_:
fixUp(size); AA%g^PWpR
} S@2Jj>3D?
} L$?~TY
Zu73x#pI
private int size=0; 3bL2fsn5
WoG
private int[] queue; Oy`\8*Uy__
=xWW+w!r
public int get() { dSD}NM
return queue[1]; 9v3Nba
} &$Ip$"H
2<./HH*f
public void remove() { [ Zqg"`
SortUtil.swap(queue,1,size--); *8eh%3_$h
fixDown(1); 1ZW'PXUZ
} m<LzB_G\
file://fixdown :<3;7R'5
private void fixDown(int k) { $zA[5}{ZtQ
int j; q'-l;V|
while ((j = k << 1) <= size) { jN{xpd
if (j < size %26amp;%26amp; queue[j] j++; Jj!tRZT
if (queue[k]>queue[j]) file://不用交换 5:3$VWLa <
break; xfQ;5n
SortUtil.swap(queue,j,k); `ZV'7|
k = j; U5%]nT"[]
} t"Rf67
} mpJ_VS`
private void fixUp(int k) { ?Lb7~XKt\
while (k > 1) { 3'uES4+r
int j = k >> 1; Z"nuO\zH~
if (queue[j]>queue[k]) DQXx}%Px
break; 7Ki7N{Kt
SortUtil.swap(queue,j,k); m64\@ [
k = j; ]`U?<9~Ob
} z#67rh{
} nE.s
bGnJ4R3J
} ebwoMG,B-
hUvH t+d
} %pKs- n`
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SortUtil： AQGE(%X
Os]M$c_88
package org.rut.util.algorithm; j~> #{"C
WZ-{K"56
import org.rut.util.algorithm.support.BubbleSort; Ybiz]1d
import org.rut.util.algorithm.support.HeapSort; -mdPqVIJn:
import org.rut.util.algorithm.support.ImprovedMergeSort; `erQp0fBM
import org.rut.util.algorithm.support.ImprovedQuickSort; .f<,H+m^
import org.rut.util.algorithm.support.InsertSort; EB<tX`Wp
import org.rut.util.algorithm.support.MergeSort; f3|=T8"t
import org.rut.util.algorithm.support.QuickSort; hpKc_|un
import org.rut.util.algorithm.support.SelectionSort; :WTvP$R
import org.rut.util.algorithm.support.ShellSort; S$:S*6M@"
iJ#oI@s
/** QZP;k!"w
* @author treeroot E1[%~Cpw*
* @since 2006-2-2 3ZZI1_j
* @version 1.0 KywT Oq
*/ NT:>.~ah@&
public class SortUtil { JH,bSb
public final static int INSERT = 1; !.N=Y;@lY
public final static int BUBBLE = 2; ~&|i'f[
public final static int SELECTION = 3; c=E.-
public final static int SHELL = 4; Cagq0-:(p
public final static int QUICK = 5; E&v-(0
public final static int IMPROVED_QUICK = 6; 82l";;n4p
public final static int MERGE = 7; gvt4'kp
public final static int IMPROVED_MERGE = 8; 0kEq|k9
public final static int HEAP = 9; }('QIvq2
6%axbB
public static void sort(int[] data) { K?eo)|4)DB
sort(data, IMPROVED_QUICK); g 0=t9J
} v65r@)\`
private static String[] name={ 3Or3@e5r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Qp Vm
}; Kwau:_B
1 .k}gl0<
private static Sort[] impl=new Sort[]{ ~kFRy{z
new InsertSort(), D4T+Gk"n
new BubbleSort(), |,f6c Omf
new SelectionSort(), B}T72!a
new ShellSort(), l/M+JT~R
new QuickSort(), g}h0J%s
new ImprovedQuickSort(), M,lu)~H
new MergeSort(), y5 +&P
new ImprovedMergeSort(), -v&srd^
new HeapSort() V!!'S h
}; _Y~?.hs^
v:b%G?o
public static String toString(int algorithm){ |9JYg7<
return name[algorithm-1]; Xb;`WE gC
} OQyOv%g5C
GQ8P}McA
public static void sort(int[] data, int algorithm) { pc>R|~J{2
impl[algorithm-1].sort(data); ;^]F~x}
} SS-
3g?T,|2K
public static interface Sort { 8ttw!x69)_
public void sort(int[] data); Ric$Xmu
} #SOe&W5
}])f^
public static void swap(int[] data, int i, int j) { OMNdvrE*=O
int temp = data; 2/WXdo
data = data[j]; ? 'nMZ
data[j] = temp; xbIA97g-O,
} 5$w1[}UUd
} _E7eJSM.