[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; *5e+@rD`
} Bd@'e7{
int i1=l; Zk&h:c
int i2=mid+1; w5*Z!
for(int cur=l;cur<=r;cur++){ Jic}+X*0
if(i1==mid+1) X eoJ$PfT
data[cur]=temp[i2++]; 9XX>A*
else if(i2>r) l?/Y
data[cur]=temp[i1++]; !Vheq3"q/
else if(temp[i1] data[cur]=temp[i1++]; k6!4Zz_8
else (DDyK[t+VX
data[cur]=temp[i2++]; C)Jn[/BD
} ME^,'&
} ,`32!i
3$VxRz)
} 3LDsxE=N:q
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改进后的归并排序: ;Wc4qJ.@
o%[U
package org.rut.util.algorithm.support; M\oTZ@
#D*r]M
import org.rut.util.algorithm.SortUtil; cX:HD+wO
:m'+tGs
/** /\Z J
* @author treeroot e8}Ezy"^
* @since 2006-2-2 Wkzs<y"
* @version 1.0 BI2; ex
*/ ~>5#5!}@*
public class ImprovedMergeSort implements SortUtil.Sort { at|g%$%
mM/i^zT
private static final int THRESHOLD = 10; |.P/:e9
Fl3#D7K
/* }CDk9Xk
* (non-Javadoc) W0XF~
* Q7gY3flg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9!U@"~yB
*/ -?6MU~"GK
public void sort(int[] data) { GX&b;N
int[] temp=new int[data.length]; U47}QDh
mergeSort(data,temp,0,data.length-1); vyI%3+N@
} ^V3v{>D>
'9?;"=6(
private void mergeSort(int[] data, int[] temp, int l, int r) { ]"~51HQZ
int i, j, k; X"q!Y#)
int mid = (l + r) / 2; k~3.MU
if (l == r) in-C/m#
return; Q;u SWt<{
if ((mid - l) >= THRESHOLD) U__(; /1;
mergeSort(data, temp, l, mid); ZJ,cQ+fn
else 'b/<x|
insertSort(data, l, mid - l + 1); 7@}$|u:JUF
if ((r - mid) > THRESHOLD) 8K9$,Ii
mergeSort(data, temp, mid + 1, r); Ucdj4[/,h
else T]T;$
insertSort(data, mid + 1, r - mid); }_ mT l@*
4~z?"
for (i = l; i <= mid; i++) { ?BA^YF
temp = data; Pw0Ci
} ?=;qK{)37
for (j = 1; j <= r - mid; j++) { ^Q+i=y{W
temp[r - j + 1] = data[j + mid]; m~#%Q?_ %
} &o3K%M;C?
int a = temp[l]; BxK^?b[E8
int b = temp[r]; lb*8G
for (i = l, j = r, k = l; k <= r; k++) { ww k PF
if (a < b) { KvPX=/&Zu
data[k] = temp[i++]; up'
a = temp; $ (=~r`O+1
} else { }!>=|1fY
data[k] = temp[j--]; 5S{7En~zUE
b = temp[j]; X"fh@.
} [&?8,Q(
} w$Ot{i|$(
} ,)!u)wz
-fI@])$9J
/** j2l55@
* @param data <M]h{BS=
* @param l RW$:9~
* @param i e`>{$t
*/ efP&xk
private void insertSort(int[] data, int start, int len) { '3IC*o"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mqff]m
} K+=+?~
} >wHxmq8F5<
} (b,[C\RBF
} JwnQ0 e
t*<#<a
堆排序： I zbU)ud
eM7Bc4V
package org.rut.util.algorithm.support; `#-P[q<v-
sbj(|1,ac
import org.rut.util.algorithm.SortUtil; '_k+WH&
:!a2]-D}
/** '})0!g<Y
* @author treeroot P|tNL}2`;
* @since 2006-2-2 `+:.L>5([
* @version 1.0 !HeSOzN
*/ G`fC/Le
public class HeapSort implements SortUtil.Sort{ /walu+]h
*+'2?*
/* (non-Javadoc) (+<1*5BEkT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E37<"(;
*/ @+F4YJmB?l
public void sort(int[] data) { W|:lVAP.|}
MaxHeap h=new MaxHeap(); %ek'~
h.init(data); Eodn/
for(int i=0;i h.remove(); sVk$x:k1M
System.arraycopy(h.queue,1,data,0,data.length); 54-#QIx|
} Uo12gIX
@yXfBML?]
private static class MaxHeap{ zk*c)s
l {jmlT
void init(int[] data){ 1i:|3PA~
this.queue=new int[data.length+1]; uEyH2QO
for(int i=0;i queue[++size]=data; gBh;=vOD
fixUp(size); I+>%uShm
} $N:Vo(*
} yme^b ;a
l\M_-:I+4
private int size=0; z@|GC_L
;,i]w"*
private int[] queue; i wxVl)QL
~8"8w(CG*I
public int get() { ay "'#[
return queue[1]; \I"Z2N>^z
} R8rfM?"W
\0lnxLA
public void remove() { *BuUHjTv
SortUtil.swap(queue,1,size--); @/ZF` :
fixDown(1); g;$Xq)Dd
} ?Kvl!F!`
file://fixdown ae:zWk'!
private void fixDown(int k) { }ENR{vz$A
int j; 8Og_W8
while ((j = k << 1) <= size) { P=3RLL<l
if (j < size %26amp;%26amp; queue[j] j++; W^3uEm&l!)
if (queue[k]>queue[j]) file://不用交换 322jR4QGr
break; ]EwVpvTw
SortUtil.swap(queue,j,k); |-V&O=!^+
k = j; JpsPNa
} O+}qQNe<
} `wF8k{Pb
private void fixUp(int k) { WDFjp
while (k > 1) { FnJ?C&xK
int j = k >> 1; ;nC.fBu
if (queue[j]>queue[k]) V=fEPM
break; mUS_(0q
SortUtil.swap(queue,j,k); OHiQ7#y
k = j; w =.Fj
} 8-y{a.,u.
} x(<(t:?o
%IC73?
} =+t^f
E0`Lg c
} dlhdsj:
>^XBa*4;Y
SortUtil： P/EM :
3~nnCR[R
package org.rut.util.algorithm; Fu&EhGm6
L\y;LSTU
import org.rut.util.algorithm.support.BubbleSort; 6c^e\0q
import org.rut.util.algorithm.support.HeapSort; asY[8r?U
import org.rut.util.algorithm.support.ImprovedMergeSort; ui(^k $
import org.rut.util.algorithm.support.ImprovedQuickSort; 0b4R
import org.rut.util.algorithm.support.InsertSort; CR6R?R3b
import org.rut.util.algorithm.support.MergeSort; P!"&%d
import org.rut.util.algorithm.support.QuickSort; 6mKjau{r_
import org.rut.util.algorithm.support.SelectionSort; )_/5*Ly@
import org.rut.util.algorithm.support.ShellSort; v3v[[96p
[D*UT#FM
/** @as"JAN
* @author treeroot @+atBmt
* @since 2006-2-2 Q#nOJ(KV
* @version 1.0 ,V*%V;
*/ R+&jD;U{
public class SortUtil { ooUk O
public final static int INSERT = 1; N^Bo .U0\
public final static int BUBBLE = 2; n_3O-X(
public final static int SELECTION = 3; 2tal
public final static int SHELL = 4; TLoz)&@
public final static int QUICK = 5; kOh{l: 2-+
public final static int IMPROVED_QUICK = 6; 5|jw^s7
public final static int MERGE = 7; 35tu>^_#V
public final static int IMPROVED_MERGE = 8; MwmUgN"g
public final static int HEAP = 9; &QhX1dT+
Qg6W5Hc
public static void sort(int[] data) { SM`w;?L:?
sort(data, IMPROVED_QUICK); +-E~6^>
} 1Bpv"67
private static String[] name={ <{~6}6o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;j4?>3
}; i;!H!-sM
ID#I`}h.k
private static Sort[] impl=new Sort[]{ XS$OyW_Q
new InsertSort(), 7O,U?p
new BubbleSort(), 61xs%kxb..
new SelectionSort(), rk)##)
new ShellSort(), 271&i
new QuickSort(), 6M13f@v
new ImprovedQuickSort(), qIld;v8w"g
new MergeSort(), cI=(\pC
new ImprovedMergeSort(), C-iK$/U
new HeapSort() r2k2%nI-J
}; e^ v.)
jg?x&'u\)
public static String toString(int algorithm){ {J^lX/D
return name[algorithm-1]; d6W SL;$
} c+2FC@q{l
b$Vz2Fzx
public static void sort(int[] data, int algorithm) { :]J Ye*
impl[algorithm-1].sort(data); ?(R]9.5S
} }<dRj
~i`>adJ:
public static interface Sort { f%V4pzOc"
public void sort(int[] data); }!6\|;Qsz,
} ?wO-cnl
y.[Mnj
public static void swap(int[] data, int i, int j) { 'Y]mOD^p
int temp = data; .|/~op4;
data = data[j]; 9;veuX#(
data[j] = temp; y~75r\"R
} ^$t7+g
} 6oBfB8]:d