[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; I&x69
} Ac[;S!R
int i1=l; h 'is#X 6:
int i2=mid+1; Me;Nn$'%
for(int cur=l;cur<=r;cur++){ !A_KCM:Ym
if(i1==mid+1) ];0:aSi#
data[cur]=temp[i2++]; o%Qn%gaX
else if(i2>r) 0E&XD&D
data[cur]=temp[i1++]; er!+QD,EM
else if(temp[i1] data[cur]=temp[i1++]; zH@+\#M
else wp-3U}P2(
data[cur]=temp[i2++]; RWn#"~
} x/92],.Mz
} #mO.[IuD
+,9Mufh
} 8EI&}I
jg3['hTJT
改进后的归并排序: [3W+h1
.q$/#hN:e
package org.rut.util.algorithm.support; v/wR)9
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import org.rut.util.algorithm.SortUtil; ]O+Nl5*
jbTyM"Y
/** j;*= ^s
* @author treeroot tLx8}@X"
* @since 2006-2-2 #kQLHi3##
* @version 1.0 *km- pp
*/ (8j@+J
public class ImprovedMergeSort implements SortUtil.Sort { niM(0p
<NMOs"NB
private static final int THRESHOLD = 10; :.\h.H;
mDU-;3OqF
/* 1) G6
* (non-Javadoc) VnMiZAHR
* ~9+\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^KFwO=I@PV
*/ {pB9T3ry]
public void sort(int[] data) { knZ<V%/e
int[] temp=new int[data.length]; 2E3x=
mergeSort(data,temp,0,data.length-1); w+tO@
} %bUpVyi!(
3836Di:{
private void mergeSort(int[] data, int[] temp, int l, int r) { LIHf]+
int i, j, k; rW3fd.;kss
int mid = (l + r) / 2; D$c4's`5
if (l == r) bDPT1A`F
return; \>-%OcYlM
if ((mid - l) >= THRESHOLD) bwh.ekf8
mergeSort(data, temp, l, mid); m,]M_y\u
else c^8y/wfok
insertSort(data, l, mid - l + 1); W1J7$
if ((r - mid) > THRESHOLD) o,RLaS,BK'
mergeSort(data, temp, mid + 1, r); 3^zOG2
else th*E"@
insertSort(data, mid + 1, r - mid); g@lAk%V4
4%k_c79>
for (i = l; i <= mid; i++) { |bz,cvlP W
temp = data; 1cdM^k
} C,D~2G
for (j = 1; j <= r - mid; j++) { Z5o6RTi
temp[r - j + 1] = data[j + mid]; #yVY!+A
} 4m6E~_:F
int a = temp[l]; F 'U Gp
int b = temp[r]; @YTZnGG*
for (i = l, j = r, k = l; k <= r; k++) { Io&F0~Z;;(
if (a < b) { 5q?ZuAAA
data[k] = temp[i++]; rB:W\5~7
a = temp; b fsTeW+
} else { ,9p 4(jjX
data[k] = temp[j--]; p`JD8c
b = temp[j]; jM90 gPX>,
} y(8AxsROp
} mko<J0|4
} L[*Xrp;/&
I.\fhNxHY
/** x*[\$E`v
* @param data S0Y$$r
* @param l u#Qd`@p
* @param i Ro?aDrQ
*/ S:Ne g!`
private void insertSort(int[] data, int start, int len) { eJ#q! <
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ``}EbOMG
} 8:,l+[\
} LEkO#F(
} i9oi}$;J
} pVt8z|p_;{
&la;Vu"dp
堆排序： fG5U' Vw
m$:o+IH/
package org.rut.util.algorithm.support; b{t'Doe
}cG!93
import org.rut.util.algorithm.SortUtil; 7!`,P
Nq)=E[$
/** n||/3-HDj
* @author treeroot _}7N,Cx
* @since 2006-2-2 =x~HcsJ8!R
* @version 1.0 +)FB[/pXk
*/ Cv|ya$}a
public class HeapSort implements SortUtil.Sort{ [(Pm\o
@twClk.s
/* (non-Javadoc) (yCFpb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #|34(ML
*/ ;z>)&F
public void sort(int[] data) { hX]vZR&R
MaxHeap h=new MaxHeap(); `bffw:;%
h.init(data); =LS?:Mhm
for(int i=0;i h.remove(); : \w\K:
System.arraycopy(h.queue,1,data,0,data.length); [dL4u^]{
} :0j9
2*5Z| 3aX
private static class MaxHeap{ ~w'M8(
t+5JIQY>
void init(int[] data){ RJ1Q.o
this.queue=new int[data.length+1]; -1~bWRYq
for(int i=0;i queue[++size]=data; C9U~lcIS
fixUp(size); *S_eYKSl
} Dg4?,{c9W
} rm NqS+t
pUWj,&t
private int size=0; Zycu3%JI
SqTO~zGC
private int[] queue; 37Z:WJ?
Y6/'gg'&5
public int get() { S\ ~Wpf
return queue[1]; '@9h@,tc
} }.O2xZ;}]'
{b[8x
public void remove() { 'QjX2ytgX
SortUtil.swap(queue,1,size--); ` a5$VV%J
fixDown(1); !L+*.k:
} |Z<NM#1
file://fixdown `(?E-~#'
private void fixDown(int k) { qIa|sV\w0
int j; AxUj CerNf
while ((j = k << 1) <= size) { =u(. Y
if (j < size %26amp;%26amp; queue[j] j++; EaG3:<>J
if (queue[k]>queue[j]) file://不用交换 !j6]k^ra
break; NWSBqL5v
SortUtil.swap(queue,j,k); q3B#rje>h
k = j; [ottUS@
} &)OX*y
} H3}{]&a
private void fixUp(int k) { 0x'>}5`5
while (k > 1) { ?ZDXT2b~~
int j = k >> 1; pm,&kE
if (queue[j]>queue[k]) (t1:2WY@
break; 1"009/|
SortUtil.swap(queue,j,k); cpp0Y^
k = j; xCD|UC46?X
} [XjJsk,
} <*~vZT i(
Qi#%&Jz>f
} 2P~zYdjS
$$2\qN -
} >sdj6^[+
{=j!2v#8~
SortUtil： a0Cf.[L
.G#S*L
package org.rut.util.algorithm; iV[g.sP-
s(J,TS#I]
import org.rut.util.algorithm.support.BubbleSort; B0NKav
import org.rut.util.algorithm.support.HeapSort; #Na3eHT
import org.rut.util.algorithm.support.ImprovedMergeSort; tWD~|<\. )
import org.rut.util.algorithm.support.ImprovedQuickSort; MRiQaUg2
import org.rut.util.algorithm.support.InsertSort; mF[w-<:.d
import org.rut.util.algorithm.support.MergeSort; ScYw3i
import org.rut.util.algorithm.support.QuickSort; f@+[-yF
import org.rut.util.algorithm.support.SelectionSort; as- Z)h[B
import org.rut.util.algorithm.support.ShellSort; &!vJ3:
kN>%y&cK
/** c%r?tKG6
* @author treeroot }kdYR#{s
* @since 2006-2-2 V}=9S@$o
* @version 1.0 Id(o6j^J_
*/ =xWZJ:UnU
public class SortUtil { \zw0*;&U
public final static int INSERT = 1; ~cVFCM
public final static int BUBBLE = 2; deHhl(U;
public final static int SELECTION = 3; DTk)Y-eQ
public final static int SHELL = 4; \T'uFy9&a
public final static int QUICK = 5; 11}X2j~Ww
public final static int IMPROVED_QUICK = 6; W~k"`g7uu
public final static int MERGE = 7; o-Pa3L=
public final static int IMPROVED_MERGE = 8; ge9j:S{
public final static int HEAP = 9; 9%j_"+<c
N&U=5c`Q'
public static void sort(int[] data) { i)g=Lew
sort(data, IMPROVED_QUICK); (p'yya{(
} >_(Xb%w
private static String[] name={ "]Wrir?l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +^YXqOXU
}; E!&A[TlX\
-bu.Ar-#;h
private static Sort[] impl=new Sort[]{ bv$_t)Xh
new InsertSort(), A1zM$ wDU
new BubbleSort(), kG/:fP
new SelectionSort(), ,J"6(nk
new ShellSort(), _?kjIF
new QuickSort(), p<*3mbgGO
new ImprovedQuickSort(), -gefdx6ES
new MergeSort(), N|Xx#/
new ImprovedMergeSort(), /UTeaM!?"
new HeapSort() G1z[v3T
}; $As;Tvw.
@|v4B[/
public static String toString(int algorithm){ <61T)7
return name[algorithm-1]; AHc:6v^
} :oYu+cQ
i-w^pv'
public static void sort(int[] data, int algorithm) { aa2&yc29hp
impl[algorithm-1].sort(data); W\:!v%C
} 9{@[l!]W
m.e+S,i
public static interface Sort { ]l7) F-v
public void sort(int[] data); kg?[
} R7}=k)U?d@
e3,TY.,Ay
public static void swap(int[] data, int i, int j) { '=K [3%U
int temp = data; bhDV U(%I6
data = data[j]; ma[%,u`
data[j] = temp; D*BZp0x
} .|iMKRq
} iZ %KHqG