[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; ~?Zib1f)
} Et=Pr+Q{c
int i1=l; Pv -4psdw
int i2=mid+1; O]N/(pe:d
for(int cur=l;cur<=r;cur++){ HsY5wC
if(i1==mid+1) X8C7d6ca
data[cur]=temp[i2++]; U4D7@KY +m
else if(i2>r) 5pQpzn=
data[cur]=temp[i1++]; a4Q@sn;]
else if(temp[i1] data[cur]=temp[i1++]; 9"~ FKMN
else 6v`3/o
data[cur]=temp[i2++]; 9+ 'i(q z
} %rwvY`\
} c_8&4
I}C2;[aB
} 'uL4ezTtA
o[Iu9.zJpy
改进后的归并排序: HuhQ|~C+~
f%G\'q]#F
package org.rut.util.algorithm.support; gV_v5sk
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import org.rut.util.algorithm.SortUtil; 0eY!Z._^
VfU"%0x
/** #GzALF97
* @author treeroot `TBXJ(Y
* @since 2006-2-2 ASqYA1p.
* @version 1.0 { I#>6
*/ X[BP0:`t
public class ImprovedMergeSort implements SortUtil.Sort { YT(N][V
{_9O4 + &
private static final int THRESHOLD = 10; ]#:WL)@
O8]e(i
/* rA~f68h|
* (non-Javadoc) R%UTYRLUn
* "O34 E?ql.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q/O2E<=w*c
*/ u\\t~<8
public void sort(int[] data) { 9q'9i9/3d
int[] temp=new int[data.length]; 3^8Cc(bk
mergeSort(data,temp,0,data.length-1); )/RG-L
} nCQtn%j't
4H{t6t@-:
private void mergeSort(int[] data, int[] temp, int l, int r) { ]]j^
int i, j, k; ale'-V)5
int mid = (l + r) / 2; *5)UIRd
if (l == r) bP18w0>,
return; (/:m*x*6
if ((mid - l) >= THRESHOLD) ;Y7'U rn
mergeSort(data, temp, l, mid); "6B@V=d
else O= S[n
insertSort(data, l, mid - l + 1); o[Ffa#sE
if ((r - mid) > THRESHOLD) 8t!jo.g
mergeSort(data, temp, mid + 1, r); H/o_?qK
else :>FN|fz
insertSort(data, mid + 1, r - mid); u8-6s+ O
8~Cmn%
for (i = l; i <= mid; i++) { 1T!o`*
temp = data; f,G*e367:
} g,,wG k
for (j = 1; j <= r - mid; j++) { 2!#g\"
temp[r - j + 1] = data[j + mid]; H^d?(Svh
} Rqe.=+Qs
int a = temp[l]; v>8.TE~2
int b = temp[r]; M%E<]H2;S
for (i = l, j = r, k = l; k <= r; k++) { y3~`qq
if (a < b) { r8 9o
data[k] = temp[i++]; AjK5x@\
a = temp; QAkK5,`vV.
} else { {H)7K.hQN
data[k] = temp[j--]; x Lan1V
b = temp[j]; sxT&T=7
} Bsa;,
} x?S86,RW
} hF'VqJS
m.lR]!Y=w
/** ?lC>E[
* @param data z|pt)Xl
* @param l yrxX[Hg?@
* @param i )Rn\6ka
*/ ZID-~ 6
private void insertSort(int[] data, int start, int len) { cZVx4y%kz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'g%:/lwA
} cKTjQJ#
} wO]e%BTO
} TtkHMPlm_
} qA>#;UTp
oJA_"xp
堆排序： )0/9 L
k]p|kutQCy
package org.rut.util.algorithm.support; n.g-%4\q
g+B7~Z5,
import org.rut.util.algorithm.SortUtil; r^5%0_F]
&g;!n&d zP
/** p_I^7 $
* @author treeroot [xiqlb,8
* @since 2006-2-2 -Cyo2wk
* @version 1.0 ps'_Y<@
*/ Krae^z9R
public class HeapSort implements SortUtil.Sort{ `df!-\#
26p[x'W
/* (non-Javadoc) e|oMbTZ5m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7<su8*?
*/ t`B@01;8A
public void sort(int[] data) { # Wi?I=,
MaxHeap h=new MaxHeap(); lpXGsKH2
h.init(data); Y\9}LgIvr
for(int i=0;i h.remove(); uE.BB#
System.arraycopy(h.queue,1,data,0,data.length); jJIP $
} wp@_4Iq1$
=!t;e~^8]
private static class MaxHeap{ Xqw}O2QQ1
TVNgj.`+u!
void init(int[] data){ 1_t+lJI9j
this.queue=new int[data.length+1]; Srx:rUCv
for(int i=0;i queue[++size]=data; ^i|R6oO_5
fixUp(size); t,r]22I,`
} :.5l
} >e {1e
~vA{I%z5~
private int size=0; u@dvFzc
ktrIi5B
private int[] queue; #][i!9$
IW~wO
public int get() { c*rH^Nz
return queue[1]; Zp)=l Td
} @dv8 F "v
O&<p 8
public void remove() { e@vtJaSu
SortUtil.swap(queue,1,size--); >OaD7
fixDown(1); Aax;0qGbH
} }@q/.Ct! x
file://fixdown jh/,G5RM9
private void fixDown(int k) { +51heuu[o
int j; ~yJ2@2I
while ((j = k << 1) <= size) { fk,Vry
if (j < size %26amp;%26amp; queue[j] j++; "jAd.x?X7e
if (queue[k]>queue[j]) file://不用交换 &B&8$X
break; 3q73L<f
SortUtil.swap(queue,j,k); %_W4\
k = j; o*)Sg6Yk
} -8^qtB
} ketp9}u
private void fixUp(int k) { ASHU0v
while (k > 1) { @?<[//1
int j = k >> 1; CFh9@Nx
if (queue[j]>queue[k]) 3'.@aMA@
break; I6 ?(@,
SortUtil.swap(queue,j,k); k^Qf |
k = j; %]Z4b;W[Y
} U1r]e%df)
} w*6b%h%ww
44}5o
} \<pr28
Jx5`0?
} ;v.[aq
i#V(oSx
SortUtil： Fs~(>w@
1x|3|snz)
package org.rut.util.algorithm; g$s;;V/8e
P)K$+oo
import org.rut.util.algorithm.support.BubbleSort; #Kb /tOp1
import org.rut.util.algorithm.support.HeapSort; %(6IaqJ[
import org.rut.util.algorithm.support.ImprovedMergeSort; >IIq_6Z#
import org.rut.util.algorithm.support.ImprovedQuickSort; ,Iyc0
import org.rut.util.algorithm.support.InsertSort; p{L;)WTI
import org.rut.util.algorithm.support.MergeSort; S-Y{Vi"2
import org.rut.util.algorithm.support.QuickSort; 2Xl+}M.:Y
import org.rut.util.algorithm.support.SelectionSort; <(KCiM=E$
import org.rut.util.algorithm.support.ShellSort; fLe~X!#HF
,m<YSMKX
/** (S!UnBb&
* @author treeroot Y]([K.I=
* @since 2006-2-2 B2[f1IMI
* @version 1.0 2{h2]F
*/ OV]xo8a;
public class SortUtil { eJo" Z
public final static int INSERT = 1; %NQ%6B
public final static int BUBBLE = 2; jg?UwR&
public final static int SELECTION = 3; `a&L
public final static int SHELL = 4; U"7o;q
public final static int QUICK = 5; eaFkDl
public final static int IMPROVED_QUICK = 6; K(?V]Mxl6
public final static int MERGE = 7; naaKAZ!S
public final static int IMPROVED_MERGE = 8; WPRk>j
public final static int HEAP = 9; w<H Xe
P7-k!p"
public static void sort(int[] data) { ATkd#k%S
sort(data, IMPROVED_QUICK); {P6Bfh7CZ
} %"f85VfZ
private static String[] name={ H7'42J@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `&A`&-nc=
}; Sl8+A+
Tm`@5
private static Sort[] impl=new Sort[]{ Z+k) N
new InsertSort(), ]S%_&ZMCM
new BubbleSort(), MUl`0H"tR
new SelectionSort(), L~5f*LE$1
new ShellSort(), GUu8 N
new QuickSort(), c \??kQH
new ImprovedQuickSort(), fZ-"._9UyH
new MergeSort(), TIJH}Ri
new ImprovedMergeSort(), IIAp-Y~B
new HeapSort() qA '^b~
}; C)U4Fr ?E:
+1wEoU.l2
public static String toString(int algorithm){ ""7H;I&
return name[algorithm-1]; ]izHn;+
} h>bjG
QqF<HCO
public static void sort(int[] data, int algorithm) { >c0leT
impl[algorithm-1].sort(data); igQzL*X
} MX]#|hEeQ
i]<@
public static interface Sort { 3YLK?X8
public void sort(int[] data); yr+QV:oVA
} :WWHEZK
'ij+MU1
public static void swap(int[] data, int i, int j) { ;}6wj@8He
int temp = data; C5(XZscq
data = data[j]; eM!Oc$C8[
data[j] = temp; ~EmK;[Z
} K_+M?ap_
} j?C[ids<