[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; g~(G P
} asE.!g?
int i1=l; fGW~xul_
int i2=mid+1; \ [M4[Qlq
for(int cur=l;cur<=r;cur++){ .Wi%V"
if(i1==mid+1) [w-# !X2y
data[cur]=temp[i2++]; (w+SmD
else if(i2>r) 7<L!" 2VB
data[cur]=temp[i1++]; !s !el;G
else if(temp[i1] data[cur]=temp[i1++]; :o87<) _F
else +;*4.}
data[cur]=temp[i2++]; .Iz JJp
} "Er8RUJA
} "HwlN_PA
;5
} :T>OJ"p
iA`.y9'2
改进后的归并排序: 2f{a||
5E 9R+N
package org.rut.util.algorithm.support; Bk@EQdn
:c Er{U8
import org.rut.util.algorithm.SortUtil; jwuSne
Qs?p)3qp
/** W6r3v)~
* @author treeroot b\kA
* @since 2006-2-2 kIe)ocJg
* @version 1.0 qv>l
*/ Eg2SC?5
public class ImprovedMergeSort implements SortUtil.Sort { bYX.4(R
G8MLg#
private static final int THRESHOLD = 10; Zlt,Us`
\IEuu^
/* |oePB<N
* (non-Javadoc) \@T;/Pj{[
* g $^Yv4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )cL`$h4DD
*/ '#oH1$W]
public void sort(int[] data) { ^4p$@5zH
int[] temp=new int[data.length]; 2S4SG\
mergeSort(data,temp,0,data.length-1); `Tk~?aY
} t!u>l
($8!r|g5#
private void mergeSort(int[] data, int[] temp, int l, int r) { 4Me3{!HJz
int i, j, k; )T&r770
int mid = (l + r) / 2; I]pz3!On4,
if (l == r) tO D}&
return; &' y}L'
if ((mid - l) >= THRESHOLD) B?e] Ht
mergeSort(data, temp, l, mid); r%>7n,+o
else OHnsfXO_V
insertSort(data, l, mid - l + 1); 7{k?"NF
if ((r - mid) > THRESHOLD) SL\15`[{
mergeSort(data, temp, mid + 1, r); fP8bWZ{
else C*11?B[
insertSort(data, mid + 1, r - mid); Po.by~|
e? |4O<@
for (i = l; i <= mid; i++) { !CY*SGO
temp = data; W'Y(@
} ~zvZK]JoX
for (j = 1; j <= r - mid; j++) { YUyYVi7clq
temp[r - j + 1] = data[j + mid]; A6E~GJa
} J$T(p%
int a = temp[l]; G,1g~h%I$
int b = temp[r]; }I#_H
for (i = l, j = r, k = l; k <= r; k++) { v-"nyy-&Z
if (a < b) { !kH 1|
data[k] = temp[i++]; 0,8RA_Ca}
a = temp; C~nL3w
} else { 3{Zd<JYg4-
data[k] = temp[j--]; ZsYY)<n
b = temp[j]; l&mY}k
} g:6`1C
} ;RQ}OCz9}8
} sheCwhV
}D3hP|.X
/** ; 3sjTqD
* @param data FF|M7/[~
* @param l [o7Qr?RN
* @param i =+[`9
*/ F[)tg#}@G
private void insertSort(int[] data, int start, int len) { g&8-X?^Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tbfwgK
} i'1MZ%.
} [l7n"gJ~
} +Z=y/wY
} f|3LeOyz
~0}d=d5g
堆排序： ^7t1'A8e<
*/|<5X;xIA
package org.rut.util.algorithm.support; YOA)paq+
?V(+Cc
import org.rut.util.algorithm.SortUtil; 6!;D],,"#.
k\g:uIsv$
/** vWL|vR
* @author treeroot ZG~d<kM&8s
* @since 2006-2-2 9ESV[
* @version 1.0 .&8a ;Q?c
*/ $ERiBALN:
public class HeapSort implements SortUtil.Sort{ |8)\8b|VuC
UgZL<}
/* (non-Javadoc) g'2;///
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F%O+w;J4
*/ <,U$Y>
public void sort(int[] data) { T{=&>pNK[
MaxHeap h=new MaxHeap(); Lzcea+*uw
h.init(data); ~]n=TEJ>
for(int i=0;i h.remove(); 1qm*#4x
System.arraycopy(h.queue,1,data,0,data.length); 9;L8%T (
} K<50>uG
r8[)Ccv
private static class MaxHeap{ XK)0Mt\
lB8gD
void init(int[] data){ NK:! U
this.queue=new int[data.length+1]; eax"AmO
for(int i=0;i queue[++size]=data; HXkXDX9&'.
fixUp(size); ,rNud]NM8
} hf7[<I,jov
} +%K~HYN
o*oFCR]j
private int size=0; .kgt?r
X!@ Y,
private int[] queue; "M^mJl&*b
ySF^^X$J
public int get() { Y_~otoSoY
return queue[1]; (Ap?ixrR_
} +/" \.wYv
,K|UUosS-#
public void remove() { 2zuQeFsK
SortUtil.swap(queue,1,size--); Yvu?M8aK!
fixDown(1); ,/!^ZS*
} #u +~ ^M
file://fixdown QUh`kt(E
private void fixDown(int k) { %8d]JQ
int j; \l`{u)V
while ((j = k << 1) <= size) { H?V b
if (j < size %26amp;%26amp; queue[j] j++; 6)>otB8)J
if (queue[k]>queue[j]) file://不用交换 ofPv?_@
break; y! QYdf?
SortUtil.swap(queue,j,k); _6g(C_m'T?
k = j; s=556
} Py?Q::
} $ ?|;w,%I
private void fixUp(int k) { =hY/Yr%P
while (k > 1) { 4U u`1gtz
int j = k >> 1; 2^f7GP
if (queue[j]>queue[k]) )CgH|z:=b
break; Ka<J* k3
SortUtil.swap(queue,j,k); <Pi#-r.,
k = j; .1_kRy2*.
} \^jRMIM==
} wyXQP+9G
jdx T662q
} ~=|QPO(d
p%K(dA
} t6lwKK
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SortUtil： r\)bN4-g
cmU>A721
package org.rut.util.algorithm; K_!:oe7%
9}H]4"f7
import org.rut.util.algorithm.support.BubbleSort; tf[)| /M
import org.rut.util.algorithm.support.HeapSort; 3Vak C
import org.rut.util.algorithm.support.ImprovedMergeSort; i4XiwjCHN
import org.rut.util.algorithm.support.ImprovedQuickSort; {faIyKtW
import org.rut.util.algorithm.support.InsertSort; b`F]oQ_*
import org.rut.util.algorithm.support.MergeSort; 2.MY8}&WBu
import org.rut.util.algorithm.support.QuickSort; 2. v<pqn
import org.rut.util.algorithm.support.SelectionSort; >`0mn|+
import org.rut.util.algorithm.support.ShellSort; ?/myG{E
8pZOgh
/** bR8`Y(=F9b
* @author treeroot *%E\mu,,c
* @since 2006-2-2 c]/S<w<
* @version 1.0 xErb11
*/ ;uzLa%JQ
public class SortUtil { (L(n%
public final static int INSERT = 1; 8(L6I%k*
public final static int BUBBLE = 2; 8;#yXlf
public final static int SELECTION = 3; l[rK)PM
public final static int SHELL = 4; E>`|?DE@
public final static int QUICK = 5; j0s$}FPUI
public final static int IMPROVED_QUICK = 6; o^m?w0 \
public final static int MERGE = 7; 3xiDt?&H
public final static int IMPROVED_MERGE = 8; g(,^';j
public final static int HEAP = 9; n|KYcU#
U.JE \/
public static void sort(int[] data) { e6^}XRyf
sort(data, IMPROVED_QUICK); 4IvT}Us#+
} n 8 K6m(
private static String[] name={ G8!|Lo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E%Ww)P
}; &~2IFp
0=K8 nxdx
private static Sort[] impl=new Sort[]{ MH9vg5QKp
new InsertSort(), TPak,h(1
new BubbleSort(), ww #kc!'
new SelectionSort(), 6CSoQ|c{
new ShellSort(), j-.Y!$a%6
new QuickSort(), |qz%6w=
new ImprovedQuickSort(), f8`dJ5i
new MergeSort(), n9n)eI)R
new ImprovedMergeSort(), GR4DxlX
new HeapSort() ZY@ntV?
}; d325Cw?
._Ww
public static String toString(int algorithm){ _l"nwEs
return name[algorithm-1]; ?_cOU@n
} lk[Y6yE
]vP}K
public static void sort(int[] data, int algorithm) { ~"NuYM#@
impl[algorithm-1].sort(data); To5hVL<Ex"
} >P&1or)e%
/,UnT(/k(
public static interface Sort { ${eV3LSC
public void sort(int[] data); QWEE%}\3}
} Ak8Y?#"wz
Ip:54
public static void swap(int[] data, int i, int j) { wy0?*)~
int temp = data; c?u*,d) G
data = data[j]; RS l*u[fB
data[j] = temp; M.r7^9P
} B?- poB&
} ^$sqU