[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; wk#cJ`wG;
} lVCnu>8
int i1=l; :%_h'9Qq
int i2=mid+1; ]nNn"_qh
for(int cur=l;cur<=r;cur++){ 21O@yNpS$
if(i1==mid+1) V:/v r
data[cur]=temp[i2++]; ,rV;T";r
else if(i2>r) }9kn;rb$g
data[cur]=temp[i1++]; >n3ig~0d
else if(temp[i1] data[cur]=temp[i1++]; p:V1VHT,
else 2@W`OW Njm
data[cur]=temp[i2++]; y+p"5s"
} D#P]tt.Z
} w3;{z ,,T
vi.INe
} R^B8** N
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改进后的归并排序: *zQhTYY
h=Q2 ?O8
package org.rut.util.algorithm.support; orOq5?3
EU Z7?4o
import org.rut.util.algorithm.SortUtil; z\"9T?zoo
k t'[
/** fZoQQ[s
* @author treeroot :k-@w5(
* @since 2006-2-2 g/(BV7V
* @version 1.0 *eGG6$I
*/ Zv2]X-
public class ImprovedMergeSort implements SortUtil.Sort { G5%k.IRz
8"TlWHF`
private static final int THRESHOLD = 10; jn`5{ ]D
#"8'y
/* \H&;.??W
* (non-Javadoc) E@EP9X >
* &c}2[=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PjofW%7F
*/ |qVM`,%L
public void sort(int[] data) { YC$>D?FW
int[] temp=new int[data.length]; K4-_a{)/
mergeSort(data,temp,0,data.length-1); (|#%omLL
} MV w.Fl
w/:ibG@
private void mergeSort(int[] data, int[] temp, int l, int r) { ~^'WHuzPy
int i, j, k; ?gBFfi
int mid = (l + r) / 2; ~k%XW$cV
if (l == r) ayh235>a(
return; Vw3=jIQN:!
if ((mid - l) >= THRESHOLD) .K1wp G[4
mergeSort(data, temp, l, mid); FY-eoq0O3
else yY{
insertSort(data, l, mid - l + 1); YeVo=hYH@
if ((r - mid) > THRESHOLD) g6+5uvpd
mergeSort(data, temp, mid + 1, r); F("|SOhc
else AQ0zsy
insertSort(data, mid + 1, r - mid); =J"c'Z>.
aK_k'4YTm
for (i = l; i <= mid; i++) { }u1h6rd `
temp = data; bN6i*)}
} QyY<Zi;6
for (j = 1; j <= r - mid; j++) { .4l cES~
temp[r - j + 1] = data[j + mid]; ;VEKrVD
} <2fy(9y
int a = temp[l]; =**Q\Sl
int b = temp[r]; o^'QGs"
for (i = l, j = r, k = l; k <= r; k++) { ;.<HpDfG_
if (a < b) { ZmycK:f
data[k] = temp[i++]; Jz*A!Li
a = temp; cj^hwtx
} else { xj9xUun
data[k] = temp[j--]; acgx')!c
b = temp[j]; dWu;F^
} Lxv6\3I+
} {;m|\652B
} of GoaH*h
52NI{"
/** J qmL|S)
* @param data ggrkj0
* @param l lIZ&' z
* @param i x6$3KDQm
*/ 8F'm#0
private void insertSort(int[] data, int start, int len) { s}yN_D+V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TA8
} m.\JO
} o q6^
} 4)>S3Yr
} KV-h~C
OT$++cj^
堆排序： \KS.A 4
qq_ZkU@xg
package org.rut.util.algorithm.support; O4:_c-V2
o9yUJ@ :i
import org.rut.util.algorithm.SortUtil; OEX\]!3_Fm
LPZ\T}<l
/** =6f)sZpPh
* @author treeroot 6__HqBQ
* @since 2006-2-2 ^t*Ba>A
* @version 1.0 /{/mwS"W
*/ !N_eZPU.v
public class HeapSort implements SortUtil.Sort{ US"UkY-\
Pp_? z0M
/* (non-Javadoc) Ra6}<o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rZ)7(0BBs
*/ )D)4=LJ
public void sort(int[] data) { {t.S_|IE
MaxHeap h=new MaxHeap(); `I4E': ZG
h.init(data); ~=t9-AF-
for(int i=0;i h.remove(); hs:iyr]@9
System.arraycopy(h.queue,1,data,0,data.length); ie>mOsz
} 8J- ?bo
Z6Z/Y()4Tl
private static class MaxHeap{ xP;>p| M
CN}0( 2n
void init(int[] data){ ?A24h!7
this.queue=new int[data.length+1]; F\GNLi
for(int i=0;i queue[++size]=data; QAMcI:5
fixUp(size); :XoR~syT
} TJ>1?W\Z
} vA[7i*D{w
,7DyTeMpN
private int size=0; 94]i|2qj*
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private int[] queue; XW\ 3ttx
4Ssy (gt
public int get() { Fey^hx w =
return queue[1]; YfMs~}h,
} ue4{h
#?eMEws
public void remove() { dWe%6s;
SortUtil.swap(queue,1,size--); g!r)yzK
fixDown(1); PnB2a'(^@?
} <OJqeUo+*\
file://fixdown $!_}d
private void fixDown(int k) { yD`pUE$
int j; <^'IC9D]
while ((j = k << 1) <= size) { }_mMQg2>=
if (j < size %26amp;%26amp; queue[j] j++; o>T+fBHE
if (queue[k]>queue[j]) file://不用交换 y\[* mgl:
break; ,2i1 4H
SortUtil.swap(queue,j,k); Tj\hAcD
k = j; Fg}t{e]3a
} ]scr@e
} 'A\0^EvVv
private void fixUp(int k) { #`l&HV
while (k > 1) { ~V?\@R:g
int j = k >> 1; Fpwhyls
if (queue[j]>queue[k]) aGws?<1$
break; 'z)cieFKP
SortUtil.swap(queue,j,k); {yEL$8MC
k = j; 1,U)rx$H
} 0]$-}AYM
} 0>e]i[P.
%nE%^Enw
} <]|!quY<*
yX%> %#$
} _\= /~>Xl
4cJ/XgX
SortUtil： *,*XOd:3TL
gw%L M7yQR
package org.rut.util.algorithm; :S!!J*0
HCe/!2Y/%
import org.rut.util.algorithm.support.BubbleSort; >Rb jdM5K4
import org.rut.util.algorithm.support.HeapSort; 0dI7{o;<|
import org.rut.util.algorithm.support.ImprovedMergeSort; ,OP\^
import org.rut.util.algorithm.support.ImprovedQuickSort; {i3=N{5b
import org.rut.util.algorithm.support.InsertSort; ] \!,yiVeU
import org.rut.util.algorithm.support.MergeSort; #e[r0f?U
import org.rut.util.algorithm.support.QuickSort; ,9ew75Jl
import org.rut.util.algorithm.support.SelectionSort; E @Rb+8},"
import org.rut.util.algorithm.support.ShellSort; U!RIeC
a5d_= :S;
/** TV0Y{x*~iH
* @author treeroot PGVp1TQ
* @since 2006-2-2 oR7f3';?6
* @version 1.0 /q7$"wP
*/ >?G!>kw
public class SortUtil { ljz=u;O)
public final static int INSERT = 1; EU'rdG*t/R
public final static int BUBBLE = 2; k)y<iHR_o
public final static int SELECTION = 3; A1z<2.R
public final static int SHELL = 4; Y$j!-l5z
public final static int QUICK = 5; hewc5vrL
public final static int IMPROVED_QUICK = 6; P=9UK`n
public final static int MERGE = 7; w !<-e>
public final static int IMPROVED_MERGE = 8; knb0_nA
public final static int HEAP = 9; 9(_n8br1
9#~jlq(
public static void sort(int[] data) { Y`6<:8[?
sort(data, IMPROVED_QUICK); Gc5mR9pV
} g?Rq .py]!
private static String[] name={ MU:v& sk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i~M-V=Zg
}; <'A-9y]-v
+Mn(s36f2
private static Sort[] impl=new Sort[]{ rg 0u#-
new InsertSort(), {!wd5C@
new BubbleSort(), U7,.L
new SelectionSort(), `bn@;7`X
new ShellSort(), -*-"kzgd
new QuickSort(), Ys?0hd<cn
new ImprovedQuickSort(), A8AeM`
new MergeSort(), 62G%.'7
new ImprovedMergeSort(), RQ#9[6w!v
new HeapSort() iV\*7
}; - ku8n%u
yZNg[KH
public static String toString(int algorithm){ o"A?Aq
return name[algorithm-1]; Fta=yH}
} o>m*e7l,
U9Q[K`
public static void sort(int[] data, int algorithm) { ORXH<;^0y
impl[algorithm-1].sort(data); ]XL=S|tIq
} C{G%"q
yLl:G;
public static interface Sort { [[Nn~7
public void sort(int[] data); tn(6T^u
} lYr4gFOs
d?cCSf
public static void swap(int[] data, int i, int j) { ST4[d'|j
int temp = data; [p(0g;bx
data = data[j]; 89P7iSV#*
data[j] = temp; 0U#m7j
} 9o]!D,u8=5
} R4zOiBi'B