[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; .Mft+,"
} `\u),$
int i1=l; m=y,_Pz>U
int i2=mid+1; z1KC$~{O
for(int cur=l;cur<=r;cur++){ u{lDof>
if(i1==mid+1) z?) RF[
data[cur]=temp[i2++]; *$Wx*Jo
else if(i2>r) $X\` 7`v
data[cur]=temp[i1++]; 63dtO{:4
else if(temp[i1] data[cur]=temp[i1++]; #?|1~HC
else @aPu}Hi
data[cur]=temp[i2++]; n~>CE"q
} ws(}K+y_
} +nyN+X34B
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} &8YI)G%
; dHOH\,:
改进后的归并排序: VEYKrZA
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package org.rut.util.algorithm.support; SIBIh-L
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import org.rut.util.algorithm.SortUtil; f+88R=-u6S
.$s|T
/** nF y7gA|
* @author treeroot PNxO\Rc
* @since 2006-2-2 %<*pM@
* @version 1.0 {aa,#B]i
*/ JP% ;rAoJ
public class ImprovedMergeSort implements SortUtil.Sort { )*<d1$aM
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private static final int THRESHOLD = 10; 8{=(#]
mbG^fy'
/* WF.$gBH"
* (non-Javadoc) 1B]wSvP@
* d.(]V2X.J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IhKas4
*/ +z?f,`.*
public void sort(int[] data) { .$}zw|,q
int[] temp=new int[data.length]; 5}^08Xl
mergeSort(data,temp,0,data.length-1); L5|;VH
} UU~;B
n)7$xYuH
private void mergeSort(int[] data, int[] temp, int l, int r) { [-94=|S @
int i, j, k; \c^jaK5
int mid = (l + r) / 2; O NzdCgY
if (l == r) kk./-G
return; X!HSS/'
if ((mid - l) >= THRESHOLD) ^>}[[:(6/
mergeSort(data, temp, l, mid); [67f;?b
else d1_*!LW$
insertSort(data, l, mid - l + 1); JRs[%w`kD
if ((r - mid) > THRESHOLD) uC ;PP=z
mergeSort(data, temp, mid + 1, r); q@yabuN@,j
else _I"<?sh3
insertSort(data, mid + 1, r - mid); k.f:nv5JO
iP\&fZY_
for (i = l; i <= mid; i++) { I8wVvs;k
temp = data; E6\~/=X=%
} [?o vJ
for (j = 1; j <= r - mid; j++) { @9P9U`ZP
temp[r - j + 1] = data[j + mid]; )s[S.`STz
} H4",r5qw:
int a = temp[l]; 6#63D>OWp
int b = temp[r]; 4U1fPyt
for (i = l, j = r, k = l; k <= r; k++) { 4!W?z2ly~R
if (a < b) { wbKBwI5w
data[k] = temp[i++]; !x /Z"
a = temp; Pb&+(j
} else { Jy NY *
data[k] = temp[j--]; &IY_z0=
b = temp[j]; -.3k vL
} exU=!3Ji
} otVdx&%]
} 8pt<)Rs}
FQRcZpv;
/** MM$"6Jor
* @param data :@'0)7
* @param l tF1%=&ss
* @param i wDY7B
*/ gxtbu$
private void insertSort(int[] data, int start, int len) { tdK^X1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); AsF`A"Cdw<
} 2G> ]W?>
} j@\/]oL^We
} k$- q;VI
} rZ4<*Zegv
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堆排序： "<R 2oo)^
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package org.rut.util.algorithm.support; X,CFY
*%+buHe
import org.rut.util.algorithm.SortUtil; f=Y9a$.:M
;P#*R3
/** tO;W?g
* @author treeroot ofv 1G=P
* @since 2006-2-2 %+J*oFwQu
* @version 1.0 S*@0%|Q4r
*/ .Sw'Bo!Ee
public class HeapSort implements SortUtil.Sort{ =xP{f<`
.Q@'Ob`
/* (non-Javadoc) V2skr_1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [)c|oh%
*/ 84cH|j`w
public void sort(int[] data) { =i %w_e
MaxHeap h=new MaxHeap(); RL8wSK
h.init(data); ?saVk7Z[|5
for(int i=0;i h.remove(); Ka2tr]+s
System.arraycopy(h.queue,1,data,0,data.length); SXF_)1QO\W
} !}48;Pl
/a)=B)NH
private static class MaxHeap{ ay[*b_f
GQWTQIl]
void init(int[] data){ d'D\#+%>=
this.queue=new int[data.length+1]; ?"u-@E[m
for(int i=0;i queue[++size]=data; Ux]@prAq
fixUp(size); 1yc@q8
} E.9k%%X]
} &$im^0`r_
:N:8O^D^<
private int size=0; )S?}huX
H.K`#W&
private int[] queue; w+P^c|
yBKlp08J
public int get() { `vBa.)u
return queue[1]; i|'t!3I^m
} pSUp"wch
ZK*aVYnu
public void remove() { y$NG..S
SortUtil.swap(queue,1,size--); _.LWc^Sg
fixDown(1); x*)O<K
} @U5>w\
file://fixdown NDGBvb
private void fixDown(int k) { kJFHUR
int j; E+ 20->
while ((j = k << 1) <= size) { rNp#5[e
if (j < size %26amp;%26amp; queue[j] j++; Xpwom'
if (queue[k]>queue[j]) file://不用交换 MqH~L?~}|
break; z6(Q 3@iO
SortUtil.swap(queue,j,k); Ba~Iy2\x
k = j; 4VgDN(n0@
} P^-9?uBno
} ?yK\L-ad
private void fixUp(int k) { ]aL}&GlHt
while (k > 1) { $vz%
int j = k >> 1; ^Yz05\
if (queue[j]>queue[k]) ZZ7U^#RT
break; e vuP4-[y
SortUtil.swap(queue,j,k); =<xbE;,0
k = j; k=_@1b-
} W -&5 v
} _Oq\YQb v
miqCUbcU
} ;_\P;s
p60D{UzU
} Eq{TZV
#CmBgxg+M
SortUtil： pT tX[CE
XvY-C
package org.rut.util.algorithm; c-d}E!C:
w.H+$=aK
import org.rut.util.algorithm.support.BubbleSort; ?C3cPt"
import org.rut.util.algorithm.support.HeapSort; lX3h'h
import org.rut.util.algorithm.support.ImprovedMergeSort; 3R {y68-S
import org.rut.util.algorithm.support.ImprovedQuickSort; ~O-8h0d3
import org.rut.util.algorithm.support.InsertSort; =oJiNM5_u
import org.rut.util.algorithm.support.MergeSort; X3yr6J[ ^
import org.rut.util.algorithm.support.QuickSort; gG>>ynn
import org.rut.util.algorithm.support.SelectionSort; AF6'JxG7
import org.rut.util.algorithm.support.ShellSort; ba13^;fm#
H=C;g)R
/** cK&oC$[r-
* @author treeroot %\0 Y1!Hw
* @since 2006-2-2 KHtY +93
* @version 1.0 *2F}e4v
*/ _(foJRr
public class SortUtil { s=4.Ovd\
public final static int INSERT = 1; +&@0;zSga
public final static int BUBBLE = 2; UEUTu}4y
public final static int SELECTION = 3; ig{5]wZ(
public final static int SHELL = 4; -s"lW 7N^
public final static int QUICK = 5; iXFaQ
public final static int IMPROVED_QUICK = 6; 9K!='u`
public final static int MERGE = 7; .2xkf@OP
public final static int IMPROVED_MERGE = 8; 2X_ef
public final static int HEAP = 9; lDeWs%n
)RFeF!("
public static void sort(int[] data) { Sqs`E[G*
sort(data, IMPROVED_QUICK); x#D=?/~/Kv
} 3 6 ;hg#
private static String[] name={ "f_Z.6WMY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a2TC,
}; }|,y`ui\
"T|\
private static Sort[] impl=new Sort[]{ ;H lv
new InsertSort(), Cx[4 /~_<
new BubbleSort(), iq$/6!t
new SelectionSort(), /eQn$ZRP,
new ShellSort(), %L3]l
new QuickSort(), Pp2)P7
new ImprovedQuickSort(), N;Bal/kd2
new MergeSort(), 'Nh^SbD+_|
new ImprovedMergeSort(), bd4q/w4q
new HeapSort() .+>}},
}; x<(h9tB
JN_# [S$
public static String toString(int algorithm){ o9i\[Ul
return name[algorithm-1]; }kpkHq"`f
} &^.'g{\Y
g5)VV"
public static void sort(int[] data, int algorithm) { iweP3u##
impl[algorithm-1].sort(data); 7 <xxOY>y
} |Bp?"8%*l
/!hW6u5
public static interface Sort { rzu^br9X
public void sort(int[] data); ;QYK {3R?
} q)*0G*
ArY'NE\Htt
public static void swap(int[] data, int i, int j) { Z>l>@wNm
int temp = data; L6^h3*JyD
data = data[j]; s6B@:9
data[j] = temp; Ty=}A MMyE
} kbY@Y,:w
} [C$ 0HW