[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; ^$T!@+:
} &eLQ;<qO*|
int i1=l; H-PW(
int i2=mid+1; 0|qx/xo|-
for(int cur=l;cur<=r;cur++){ v>yGsJnV'
if(i1==mid+1) ]y$V/Ij=qK
data[cur]=temp[i2++]; h|Teh-@A5
else if(i2>r) pfT`WT
data[cur]=temp[i1++]; 96([V|5K
else if(temp[i1] data[cur]=temp[i1++]; '/n%}=a=
else %$!R]B)
data[cur]=temp[i2++]; JXD?a.vy^q
} 8kn]_6:3i
} J_((o
ft.}$8vIT
} W6!4Qyn
V"D<)VVA
改进后的归并排序: &d &oP
_sCJ3ZJ
package org.rut.util.algorithm.support; Xk$l-Zfse
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import org.rut.util.algorithm.SortUtil; ?AM8*w
WEY97_@
/** dOYmt,
* @author treeroot 3Wtv+L7Br
* @since 2006-2-2 JCU3\39}
* @version 1.0 U{:(j5m
*/ JWm^RQ
public class ImprovedMergeSort implements SortUtil.Sort { ]oWZ{#r2
cM7k){
private static final int THRESHOLD = 10; `__?7"p )\
p'w"V6k('~
/* GJl@ag5h]!
* (non-Javadoc) ?H86Wbz
* po](6V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R4rm>zisVX
*/ >cr_^(UW&
public void sort(int[] data) { Vlxb<$5Nh
int[] temp=new int[data.length]; GVHfN5bTqn
mergeSort(data,temp,0,data.length-1); j*Wh;I+h
} :pF]TY"K.
{-7yZ]OO$
private void mergeSort(int[] data, int[] temp, int l, int r) { +qW w-8
int i, j, k; g:3'x/a1
int mid = (l + r) / 2; GO GXM4I
if (l == r) GPqB\bxb'
return; 6+f>XL#w
if ((mid - l) >= THRESHOLD) EwBN+v;)
mergeSort(data, temp, l, mid); &#my #u^O;
else cPBy(5^
insertSort(data, l, mid - l + 1); LkZo/K~
if ((r - mid) > THRESHOLD) V1fvQ=9
mergeSort(data, temp, mid + 1, r); ,5+X%~'
else /KvPiQ%
insertSort(data, mid + 1, r - mid); (l!D=qy
W<hdb!bE
for (i = l; i <= mid; i++) { 08n%% F
temp = data; Y1ilH-8
} pZJQKTCG
for (j = 1; j <= r - mid; j++) { j6d"8oH _
temp[r - j + 1] = data[j + mid]; FC-*?
} ?m r@B
int a = temp[l]; ?OYwM?Uf
int b = temp[r]; |ukdn2Q
for (i = l, j = r, k = l; k <= r; k++) { sluZ-,zE
if (a < b) { WUK.>eM0
data[k] = temp[i++]; G~hILW^
a = temp; Jz3<yQ-
} else { +FKP5L}
data[k] = temp[j--]; a.U:B [v`
b = temp[j]; Ac(irPrD
} |3lAye,t)a
} >,]e[/p
} VGUDUM.8
@DC2ci >
/** JOne&{h]J"
* @param data 6{r[Dq
* @param l ieLN;)Iy^
* @param i .lj!~_
*/ 4k?JxA)
private void insertSort(int[] data, int start, int len) { ?,e:c XhE2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !J(,M)p!
} 7MJ)p$&
} [_G0kiI}W"
} ~zC fan/
} %c2i.E/G
G6F['g);
堆排序： Y+yvv{01
!4.^@^L|\
package org.rut.util.algorithm.support; QNa3S*
&r%^wfp
import org.rut.util.algorithm.SortUtil; ;9 n8on\
kL2sJX+
/** MCpK^7]k
* @author treeroot =0fx6V
* @since 2006-2-2 "8TMAF|i4
* @version 1.0 !e"m*S.(6{
*/ ]_xGVwem
public class HeapSort implements SortUtil.Sort{ E1w XG
:>ST)Y@]w
/* (non-Javadoc) v86`\K*0Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zvC,([
*/ 3o/a8
public void sort(int[] data) { uQ+$HzxX
MaxHeap h=new MaxHeap(); JT^0AZ_*
h.init(data); :2gO) 'cD
for(int i=0;i h.remove(); Yaepy3F
System.arraycopy(h.queue,1,data,0,data.length); emIbGkH
} HW,55#yG
{X"]92+
private static class MaxHeap{ +N&(lj
pra&A2Y\
void init(int[] data){ EPnB%'l\c
this.queue=new int[data.length+1]; #T`+~tW'|
for(int i=0;i queue[++size]=data; 640V&<+v
fixUp(size); L<]PK4
} ^P`'qfZ
} ,R6$SrNcd
y^BM*CI
private int size=0; <L#r6y~H
>maz t=,
private int[] queue; YL0RQa
Hf|:A(vCx
public int get() { lB@K;E@r8
return queue[1]; 7Wn]l!
} ka[NYW{.
X/749"23
public void remove() { sxa (
SortUtil.swap(queue,1,size--); XL9lB#v^
fixDown(1); {u3u%^E;R
} A*;h}\n
file://fixdown DO{4n1-U
private void fixDown(int k) { P .(X]+
int j; X[6z
while ((j = k << 1) <= size) { ?!Gt. fb
if (j < size %26amp;%26amp; queue[j] j++; nJC}wh2d#
if (queue[k]>queue[j]) file://不用交换 \ziF(xTvqG
break; =p$Wo
SortUtil.swap(queue,j,k); <{uIB;P
k = j; mj~CCokF{?
} (#k#0T kE
} sBL^NDqa2
private void fixUp(int k) { yRDLg c
while (k > 1) { +M:Q!'
int j = k >> 1; |JQ05nb
if (queue[j]>queue[k]) 9hU@VPB~
break; T94$}- 5/)
SortUtil.swap(queue,j,k); 5H2|:GzUc
k = j; \3/'#
} *^ BE1-
} VVY\W!
^bGi_YC
} RJM(+5xQ|
cPSu!u}D
} hRu%> =7
+0DIN4Y(4
SortUtil： 50A_+f.7%
=|/b[Gd(
package org.rut.util.algorithm; ^xrR3m*d
M#m7g4*L!
import org.rut.util.algorithm.support.BubbleSort; g&V.o5jIhc
import org.rut.util.algorithm.support.HeapSort; wDk[)9#A
import org.rut.util.algorithm.support.ImprovedMergeSort; DS fKUx&
import org.rut.util.algorithm.support.ImprovedQuickSort; HS7!O
import org.rut.util.algorithm.support.InsertSort; sEa:p:!
import org.rut.util.algorithm.support.MergeSort; <[bDNe["?
import org.rut.util.algorithm.support.QuickSort; MRc^lYj{
import org.rut.util.algorithm.support.SelectionSort; {JJ`|*H$_
import org.rut.util.algorithm.support.ShellSort; =k z;CS+
*?K=;$
/** 4w,}1uNEf
* @author treeroot RWE%?`
* @since 2006-2-2 gFH_^~7i8p
* @version 1.0 2StpcAlU}
*/ ]F~5l?4u#
public class SortUtil { pFuQ!7Uk
public final static int INSERT = 1; moGbBkO
public final static int BUBBLE = 2; 6-~
public final static int SELECTION = 3; FYJB.lAT
public final static int SHELL = 4; ~oI49Q&{
public final static int QUICK = 5; T>?~eYHXs
public final static int IMPROVED_QUICK = 6; HFazqQ[
public final static int MERGE = 7; BI s!
public final static int IMPROVED_MERGE = 8; t65!2G"<
public final static int HEAP = 9; q%"nk
TJ<PT
public static void sort(int[] data) { #3S/TBy,
sort(data, IMPROVED_QUICK); *=8)]_=f
} 5^k#fl2
private static String[] name={ C"}x=cK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vlD]!]V:h
}; :1iw_GhJf
[qz6_WOo
private static Sort[] impl=new Sort[]{ $2.DZ
new InsertSort(), M3''xrpC
new BubbleSort(), ,ZSuo4
new SelectionSort(), Um~jp:6p
new ShellSort(), E*%{Nn
new QuickSort(), ms$o,[
new ImprovedQuickSort(), kU /?#s
new MergeSort(), 1li`+~L F
new ImprovedMergeSort(), .q=X58tHu
new HeapSort() }yw\+fc
}; @ZVc!5J_,
kB 2bT}
public static String toString(int algorithm){ H|^4e
return name[algorithm-1]; ;(sb^O
} kxP6#8*:
; ^$RG
public static void sort(int[] data, int algorithm) { YP7<j*s8
impl[algorithm-1].sort(data); g/E;OcFaO
} myo/}58Nv
97g\nq<
public static interface Sort { fVkl-<?x
public void sort(int[] data); V*?,r<(
} ,R)[$n
#\jPBLc
public static void swap(int[] data, int i, int j) { 4ldN0_T5
int temp = data; lyV]-w
data = data[j]; Mk?9`?g.
data[j] = temp; ex['{|a{
} o 2DnkzpJ
} 2vwT8/