[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; e anR$I;Yj
} N% !TFQf
int i1=l; #]5A|-O^
int i2=mid+1; ,~nrNkhp
for(int cur=l;cur<=r;cur++){ Cw$7d:u
if(i1==mid+1) M$$Lsb [
data[cur]=temp[i2++]; (CR]96n
else if(i2>r) CwdeW.A"j
data[cur]=temp[i1++]; h#~\-j9>
else if(temp[i1] data[cur]=temp[i1++]; Qk[YF
else 0@LC8Bz+'
data[cur]=temp[i2++]; U.A:'9K,
} d9Uv/VGp
} IY40d^x
~m6b6Aj@6
} ttd ^jT
#gcv])to
改进后的归并排序: \u$[$R5
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package org.rut.util.algorithm.support; %/}46z9\
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import org.rut.util.algorithm.SortUtil; WvN{f*
A81'ca/
/** YwU[kr-i
* @author treeroot (TTS-(
* @since 2006-2-2 p?V@P6h
* @version 1.0 ,JqCxb9
*/ B6-1q& E/
public class ImprovedMergeSort implements SortUtil.Sort { SSn{,H8/j
)N3XbbV
private static final int THRESHOLD = 10; 8s9ZY4_
'B9q&k%<
/* ;km^ OO$
* (non-Javadoc) q(\kCUy!
* mkuK$Mj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZbfpMZ g
*/ l>*L Am5
public void sort(int[] data) { ^Rh`XE
int[] temp=new int[data.length]; pB:/oHV
mergeSort(data,temp,0,data.length-1); 0Z1';A3
} Id^)WEK4
,!vI@>nhG
private void mergeSort(int[] data, int[] temp, int l, int r) { ddzMwucjp
int i, j, k; #5yz~&
int mid = (l + r) / 2; HAmAmEc,
if (l == r) $nqVE{ksV
return; YLv5[pV
if ((mid - l) >= THRESHOLD) VM}7 ~
mergeSort(data, temp, l, mid); ;:1o|>mX
else c|s7cG$+-
insertSort(data, l, mid - l + 1); w`_"R6
if ((r - mid) > THRESHOLD) }!QVcu"+t/
mergeSort(data, temp, mid + 1, r); ?p&( Af)
else :kKdda<g#
insertSort(data, mid + 1, r - mid); @MKf$O4K
a)QSq<2*
for (i = l; i <= mid; i++) { 8 -YC#&
temp = data; ht_'GBS)
} ZtGtJV"H
for (j = 1; j <= r - mid; j++) { Vb,'VN%
temp[r - j + 1] = data[j + mid]; x(7Q5Uk\
} td5! S]
int a = temp[l]; C;I:?4
int b = temp[r]; ^tY _ q
for (i = l, j = r, k = l; k <= r; k++) { Y2aN<>f
if (a < b) { 8}K4M(
data[k] = temp[i++]; LV@tt&|N
a = temp; x4XCR,-
} else { jidRh}>a=
data[k] = temp[j--]; ![&9\aH
b = temp[j]; ^l{q{O7U$
} F% z$^ m-
} _c>8y
} 4SJb\R)XK
V`m9+<.1b
/** }v6@yU
* @param data Zg$RiQ^-{J
* @param l I9L7,~s
* @param i ~oz??SX
*/ 3c+ps;nh
private void insertSort(int[] data, int start, int len) { Ya;y@44
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QxT\_Nej*n
} LnPG+<
} q0{_w
} +1nzyD_E
} W H%EC$
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堆排序： l#TE$d^ym
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package org.rut.util.algorithm.support; F^CR$L& K
t!\B6!Fo
import org.rut.util.algorithm.SortUtil; wwE3N[
.u:aX$t+
/** :6J&%n
* @author treeroot /vs79^&
* @since 2006-2-2 Ch_eK^ g1
* @version 1.0 (,D:6(R7t
*/ yX.; x 0
public class HeapSort implements SortUtil.Sort{ HcM/
H'}6Mw%ra
/* (non-Javadoc) jI%glO'2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,olP}
*/ yof8LWXx
public void sort(int[] data) { Nxr\Yey
MaxHeap h=new MaxHeap(); =wlPm5
h.init(data); "V`5 $ur
for(int i=0;i h.remove(); nd }Z[)
System.arraycopy(h.queue,1,data,0,data.length); v8K`cijSS
} .Bojb~zt
V1yP{XT=
private static class MaxHeap{ $|t={s34
.'b|pd
void init(int[] data){ 06e dVIRr
this.queue=new int[data.length+1]; 40G'3HOp
for(int i=0;i queue[++size]=data; zEt!Pug
fixUp(size); W'6sY@0m
} F+!9T
} aU*}.{<!
\_x~lRqJJ
private int size=0; 54#P
'Pxq>Os
private int[] queue; CU:HTz=
Py#TXzEcC
public int get() { 9Dp0Pi?29
return queue[1]; ?JBA`,-
} &gcZ4gpH
4 %V9
public void remove() { PMT}fg
SortUtil.swap(queue,1,size--); 9"zp>VR
fixDown(1); $b)t`r+
} iK!FVKi}
file://fixdown n`V?n
private void fixDown(int k) { D!z'Y,.
int j; 5+UNLvsZ
while ((j = k << 1) <= size) { -$$mrU
if (j < size %26amp;%26amp; queue[j] j++; <H$!OPV
if (queue[k]>queue[j]) file://不用交换 LtUvFe
break; Pn l}<i
SortUtil.swap(queue,j,k); x[xRqC vL
k = j; aYM~Ub:x{
} )iid9K<HB
} /D964VR1M\
private void fixUp(int k) { 3taGb>15
while (k > 1) { ^6J*:(eM
int j = k >> 1; *4%%^*g.I
if (queue[j]>queue[k]) A0OA7m:~4
break; F` &W5[
SortUtil.swap(queue,j,k); GK;IY=8W
k = j; }R/we`
} p`EgMzVO,
} xQl}~G]!
Bo\~PV[
} 8tVSai8[
x~=Mn%Ew0
} Ze <)B *
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SortUtil： 1OV] W f
[SD mdr1T$
package org.rut.util.algorithm; hM[3l1o{|
*qu5o5Q
import org.rut.util.algorithm.support.BubbleSort; eL.WP`Lz
import org.rut.util.algorithm.support.HeapSort; 56Z
import org.rut.util.algorithm.support.ImprovedMergeSort; E#,\[<pc
import org.rut.util.algorithm.support.ImprovedQuickSort; U8-OQ:2.
import org.rut.util.algorithm.support.InsertSort; HD& Cp
import org.rut.util.algorithm.support.MergeSort; T2_iH=u
import org.rut.util.algorithm.support.QuickSort; ?#Y:2LqPC
import org.rut.util.algorithm.support.SelectionSort; Xppv
import org.rut.util.algorithm.support.ShellSort; Uf MQ?(,
qoZ)"M
/** ,.h@tN<C
* @author treeroot EwmNgmYq
* @since 2006-2-2 >TiEYMW
* @version 1.0 /8!n7a7
*/ /;{L~f=et)
public class SortUtil { ([^#.x)hz
public final static int INSERT = 1; I@\D tQZ
public final static int BUBBLE = 2; w=3 j'y{f
public final static int SELECTION = 3; y0-UO+;
public final static int SHELL = 4; \&~YFjB
public final static int QUICK = 5; RAnF=1[v
public final static int IMPROVED_QUICK = 6; 1;'-$K`}
public final static int MERGE = 7; }h1eB~6M
public final static int IMPROVED_MERGE = 8; bYZU}Kl;(
public final static int HEAP = 9; \98N8p;,I
><S(n#EB
public static void sort(int[] data) { o 0T1pGs'
sort(data, IMPROVED_QUICK); gf?N(,
} i=1crJ:
private static String[] name={ EJRkFn8XG'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ke=+D'=
}; 6kMkFZ}+
\ \Tz'>[\
private static Sort[] impl=new Sort[]{ D[}^G5
new InsertSort(), t&NpC;>v
new BubbleSort(), RWX!d54&
new SelectionSort(), ,7k-LAA
new ShellSort(), ALcPbr
new QuickSort(), z"mpwmv5
new ImprovedQuickSort(), 8!HB$vdw7
new MergeSort(), cx ("F/Jm
new ImprovedMergeSort(), Z`86YYGK
new HeapSort() n>7aZ1Qa
}; wOCAGEg
gFrNk Uqp
public static String toString(int algorithm){ 0TSB<,9a[
return name[algorithm-1]; #ti%hm
} BvH?d]%
8e^uKYR<
public static void sort(int[] data, int algorithm) { k<MQ
impl[algorithm-1].sort(data); 7S^G]g!x
} 8qaU[u&$
g<,0kl2'S
public static interface Sort { 0 q1x+
public void sort(int[] data); 0 x' d^
} d0C _:_
U]w"T{;@.)
public static void swap(int[] data, int i, int j) { KV$4}{
int temp = data; X/90S2=P
data = data[j]; c8Ud<M .
data[j] = temp; Zd%wX<hU"
} XogCq?_m
} v;U5[