[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; oM J5;
} g,\<fY+4
int i1=l; m,'u_yK
int i2=mid+1; Zx3m$.8
for(int cur=l;cur<=r;cur++){ }y'KS:Jb
if(i1==mid+1) @zE_fL
data[cur]=temp[i2++]; CB|Z~_Bm
else if(i2>r) gVA$P
data[cur]=temp[i1++]; p=T]%k*^h#
else if(temp[i1] data[cur]=temp[i1++]; [}.OlR3)
else |XPT2eQ{
data[cur]=temp[i2++]; QH;1*
} ;|66AIwDe
} UL(#B TK
$6R<)]6
} |NL$? %I
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改进后的归并排序: eQA89 :j,
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package org.rut.util.algorithm.support; zcDVvP
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import org.rut.util.algorithm.SortUtil; 7R ;!
H;|^z@RB<
/** D.X%wJ8
* @author treeroot O]`CSTv'_
* @since 2006-2-2 j$BM$q/c
* @version 1.0 F?3a22Zg#
*/ >AJtoJ=j
public class ImprovedMergeSort implements SortUtil.Sort { 7h,SX]4Q
%*zgN[/w
private static final int THRESHOLD = 10; 't2"CPZ
klv ]+F&[
/* !'MZeiLP
* (non-Javadoc) Vc}m_T]O
* CKyX Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A6= Um%T
*/ [ q22?kT
public void sort(int[] data) { y1B3F5
int[] temp=new int[data.length]; J1hc :I<;
mergeSort(data,temp,0,data.length-1); *o`bBdZ
} Jk 0;<2j
\f05(ld
private void mergeSort(int[] data, int[] temp, int l, int r) { Y}Y2Vx
int i, j, k; wYPJji D
int mid = (l + r) / 2; O$<kWSC
if (l == r) BNnGtVAbZ
return; @ITJ}e4
if ((mid - l) >= THRESHOLD) vA*!82
mergeSort(data, temp, l, mid); fU8 &fo%ER
else hVd% jU:
insertSort(data, l, mid - l + 1); {b}Ri&oEOH
if ((r - mid) > THRESHOLD) ^F/N-!}q
mergeSort(data, temp, mid + 1, r); +<(N]w*
else D`V03}\-
insertSort(data, mid + 1, r - mid); k& 2U&
-$>R;L
for (i = l; i <= mid; i++) { LY-fp+
temp = data; ?l &S:` L
} p$0G EYwM
for (j = 1; j <= r - mid; j++) { (0bvd
temp[r - j + 1] = data[j + mid]; amK"Z<V F
} TkM8GK-3
int a = temp[l]; GFB(c
int b = temp[r]; :D""c*
for (i = l, j = r, k = l; k <= r; k++) { i]JD::P_H
if (a < b) { c=0S]_
data[k] = temp[i++]; E.R,'Y;x
a = temp; Ivmiz{Oii
} else { lQ {k
data[k] = temp[j--]; oYG9i=lZ
b = temp[j]; <j+DY@*
} bx#GOK-
} !uLz%~F
} %4*-BCP
n<+g{QHi
/** |Ah'KpL8W
* @param data w^6rgCl
* @param l `A_CLVE
* @param i GWsvN&nr
*/ ?%Hj,b
private void insertSort(int[] data, int start, int len) { qcSlqWDk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R?Vs8?
} G~5EAeG
} {N42z0c
} &`Oj<UyJY
} 0JN>w^
W<_9*{|E;
堆排序： R*|y:T,H
t6(LO9Qc
package org.rut.util.algorithm.support; [H<![Z1*r
OGpy\0%
import org.rut.util.algorithm.SortUtil; ">_<L.,I
% P .(L
/** K%h9'}pq>1
* @author treeroot @~,&E*X! .
* @since 2006-2-2 1zqIB")s>
* @version 1.0 +m8CN(c
*/ +i HZ*
public class HeapSort implements SortUtil.Sort{ z~fZg6
4 ;ybQ
/* (non-Javadoc) AqnDsr!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b&BkT%aA(G
*/ ?y_W%ogW
public void sort(int[] data) { W}{RJWr
MaxHeap h=new MaxHeap(); #}Y$+FtO
h.init(data); 5tfD*j n
for(int i=0;i h.remove(); s\O4D*8
System.arraycopy(h.queue,1,data,0,data.length); -!V+>.Oh
} Hz~?"ts@;
Yz7H@Y2i
private static class MaxHeap{ .,[NJ:l
+}1h
void init(int[] data){ @`t#Bi9
this.queue=new int[data.length+1]; &.^(,pt
for(int i=0;i queue[++size]=data; 5ar2Y$bY
fixUp(size); Qf|x]x*5
} !8YZ;l
} k@:M#?(F
Bu_/yKW
private int size=0; F/O5Z?C?
nYy%=B|>
private int[] queue; 0i/!by{@
rG[iEY
public int get() { m-T@Og
return queue[1]; >2vUFq`H
} QiO4fS'~W
r:N =?X`N
public void remove() { LL% Aw)Q`
SortUtil.swap(queue,1,size--); 1'Sr0 oEd3
fixDown(1); ?|,dHqh{nM
} (dvsGYT|.
file://fixdown NSs"I]
private void fixDown(int k) { D/U=zDpiB
int j; q~:H>;:G-
while ((j = k << 1) <= size) { zP554Gr?
if (j < size %26amp;%26amp; queue[j] j++; oW ! Z=;
if (queue[k]>queue[j]) file://不用交换 f wE b
break; z3-A2#c
SortUtil.swap(queue,j,k); <e&88{jJ
k = j; : ;l9to
} yBKEw(1
} s|HpN
private void fixUp(int k) { lB)%s~P:s
while (k > 1) { +9gI^Gt
int j = k >> 1; =bKz$ _W
if (queue[j]>queue[k]) XS#Jy n
break; ??5y0I6+
SortUtil.swap(queue,j,k); Dfhu
k = j; I'h|7y\
} Sjb[v
} 3bK.8
|NMf'$
} 3g79pw2w=
G.{)#cR
} qe/dWJBa
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SortUtil： E^s<5BC;
o,NTIh
package org.rut.util.algorithm; k5s8s@
?_hKhn%K9
import org.rut.util.algorithm.support.BubbleSort; q#}#A@Rg
import org.rut.util.algorithm.support.HeapSort; 5X8GR5P
import org.rut.util.algorithm.support.ImprovedMergeSort; }F v:g!
import org.rut.util.algorithm.support.ImprovedQuickSort; _tl
import org.rut.util.algorithm.support.InsertSort; 6I5,PB
import org.rut.util.algorithm.support.MergeSort; s"tyCDc.c
import org.rut.util.algorithm.support.QuickSort; 12W`7
import org.rut.util.algorithm.support.SelectionSort; k`#OXLR
import org.rut.util.algorithm.support.ShellSort; k)'y;{IN
pi/Jto25z
/** 6p;G~,bd~
* @author treeroot ]Tv0+ Ao
* @since 2006-2-2 S!\4,6
* @version 1.0 ^T^l3B[
*/ r8]y1 Om<
public class SortUtil { V5]}b[X
public final static int INSERT = 1; `,-w+3?Al
public final static int BUBBLE = 2; BYhF?
public final static int SELECTION = 3; O/Q7{5n
public final static int SHELL = 4; wNNInS6
public final static int QUICK = 5; 6bv~E.
public final static int IMPROVED_QUICK = 6; %s|`1`c
public final static int MERGE = 7; .?<M$38fv
public final static int IMPROVED_MERGE = 8; @/(\YzQvp]
public final static int HEAP = 9; C2l=7+X#W
2N)siH
public static void sort(int[] data) { Rw j4
sort(data, IMPROVED_QUICK); ef !@|2
} {>x6SVF
private static String[] name={ he/WqCZg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !xqy6%p
}; -'q#u C
8ClOd<I
private static Sort[] impl=new Sort[]{ z' oK 0"
new InsertSort(), ]2Vu+AP
new BubbleSort(), [2WJ];FJ
new SelectionSort(), {~L{FG)O
new ShellSort(), XBvJc'(s
new QuickSort(), 8Uv2p{ <#
new ImprovedQuickSort(), @ )bCh(u
new MergeSort(), D'Fj"&LK
new ImprovedMergeSort(), <%_7%
new HeapSort() D@O#P^?
}; (pDu
<./r%3$;7
public static String toString(int algorithm){ 1" k_l.\,0
return name[algorithm-1]; V8C62X
} nBN+.RB:(
a/@F?\A
public static void sort(int[] data, int algorithm) { FrKI=8
impl[algorithm-1].sort(data); ?h$ =]
} *6C ]CS
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public static interface Sort { 4lVvs(W?
public void sort(int[] data); \sSt _|+
} -@I+IKz
26e.Hu
public static void swap(int[] data, int i, int j) { J*!_kg)>J
int temp = data; 55%j$f
data = data[j]; -za+Wa`vH
data[j] = temp; <~d3L4h*<
} )o=ipm[
} :kQ%Mj>