[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; w3>|mDA}I
} H[ q{R
int i1=l; K}BX6dA
int i2=mid+1; w C"%b#(}
for(int cur=l;cur<=r;cur++){ S41>VbtEp
if(i1==mid+1) P{18crC[1
data[cur]=temp[i2++]; DF2&j!
else if(i2>r) Ysu/7o4
data[cur]=temp[i1++]; ;\+0H$
else if(temp[i1] data[cur]=temp[i1++]; *q{UipZbx
else $Stu-l1e a
data[cur]=temp[i2++]; $P3nP=mf
} [3Rj?z"S
} 5b p"dIe
Qs:r@"hE
} s 'xmv{|
A]$+ `uS\
改进后的归并排序: k#xpY!'7
T"U t).
package org.rut.util.algorithm.support; 8BDL{?Mu
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import org.rut.util.algorithm.SortUtil; dL(|Y{4
mC`! \"w
/** q;.]e#wvh
* @author treeroot G>QTPXcD
* @since 2006-2-2 sfE8b/Z8
* @version 1.0 HU9y{H
*/ (_ah~VnO
public class ImprovedMergeSort implements SortUtil.Sort { ~py0Vx,F
BtChG] N|
private static final int THRESHOLD = 10; @U@yIv
;4$C$r!t
/* 0h4}RmS
* (non-Javadoc) ^<0NIu}
* QaR.8/xV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NCt sx /C
*/ Xf9%A2 iB
public void sort(int[] data) { RCXSz
int[] temp=new int[data.length]; rrYp^xLa`
mergeSort(data,temp,0,data.length-1); PqLqF5`S
} ;NE/!!
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private void mergeSort(int[] data, int[] temp, int l, int r) { ~-wJ#E3g
int i, j, k; tL{~O=
int mid = (l + r) / 2; 0z7mre^Q
if (l == r) 7"ps#)O
return; ]xEE7H]\h
if ((mid - l) >= THRESHOLD) yuEOQ\!(u
mergeSort(data, temp, l, mid); p]Zabky
else tY'QQN||
insertSort(data, l, mid - l + 1); 4&hqeY3
if ((r - mid) > THRESHOLD) / LM
mergeSort(data, temp, mid + 1, r); -oBas4J
else f*{;\n(.t
insertSort(data, mid + 1, r - mid); =pyZ^/}P
u7Y< ~
for (i = l; i <= mid; i++) { \N+Ta:U1P
temp = data; fMPq
} 1Z8Oh_DC
for (j = 1; j <= r - mid; j++) { O'|P|
temp[r - j + 1] = data[j + mid]; Ks2%F&\cE
} %C0O?q
int a = temp[l]; pm@Z[g
int b = temp[r]; x*8f3^ wE
for (i = l, j = r, k = l; k <= r; k++) { E(kpK5h{
if (a < b) { [.xk
data[k] = temp[i++]; cjC6\.+l3
a = temp; oV>AFs6
} else { zy6(S_j
data[k] = temp[j--]; a<jE25t
b = temp[j]; sJK:xk.6!
} (Zg'pSs)
} y6jmn1K
} gzCMJ<3!D
I S8nvx\
/** p[F=LP
* @param data ^.kAZSgO
* @param l ZQ-`l:G
* @param i 9$V_=Bo
*/ 9^#gVTGXv
private void insertSort(int[] data, int start, int len) { 0gD59N'C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K6*UFO4}i
} vq:OH H
} i2a"J&,6O
} L_1_y, 0N
} |z.GSI_!)
bL],KW;Q
堆排序： 3J~kiy.nfW
m2q;^o:J
package org.rut.util.algorithm.support; 'h6}cw+K
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import org.rut.util.algorithm.SortUtil; %iL@:'?K
roj04|
/** gq_7_Y/
* @author treeroot A='+tJa
* @since 2006-2-2 p$1Rgm\
* @version 1.0 ?Ga2K
*/ #C;zS9(]B
public class HeapSort implements SortUtil.Sort{ ]n]uN~)9
pebx#}]p-
/* (non-Javadoc) -C-OG}XjI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9#T%bB"J
*/ ?V)C9@bp
public void sort(int[] data) { 3^R][;
MaxHeap h=new MaxHeap(); tZu*Asx7
h.init(data); t#pqXY/;D
for(int i=0;i h.remove(); #w,WwL!
System.arraycopy(h.queue,1,data,0,data.length); CpRu*w{
} ~? FrI
+.(}u ,:8
private static class MaxHeap{ ?+,*YVT
RTgA[O4J
void init(int[] data){ Ns|V7|n]
this.queue=new int[data.length+1]; u->@|tEq
for(int i=0;i queue[++size]=data; ' MS!ss=r
fixUp(size); y }&4HrT&
} <% 7P
} xngeV_xc2
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private int size=0; &!DZW5
F;Q_*0mIQ
private int[] queue; XAU_SPAjiw
'/u:,ar
public int get() { `gt&Y-
return queue[1]; or%gTVZ
} >1a\%G
@W1WReK]f
public void remove() { 3r-VxP 5n
SortUtil.swap(queue,1,size--); [}p
fixDown(1); _/jUs_W
} Ku0H?qft(
file://fixdown x7KcO0F{
private void fixDown(int k) { Z(LxB$^l[
int j; 8yE%X!E
while ((j = k << 1) <= size) { iFnOl*TC
if (j < size %26amp;%26amp; queue[j] j++; YV1a3
if (queue[k]>queue[j]) file://不用交换 gY>;|),
break; ;-9zMbte:
SortUtil.swap(queue,j,k); 8!uL-_Bn
k = j; T@Ss&eGT2
} VA=#0w
} M2;%1^
private void fixUp(int k) { Esz1uty
while (k > 1) { Q3BLL`W~
int j = k >> 1; 9QC"Od9H
if (queue[j]>queue[k]) Y/^[qD
break; rq<`(V'2
SortUtil.swap(queue,j,k); 'NT#(m%
k = j; @)OnIQN~
} ~@-QbkC
} h9<mThvgn
'0R/6Z|/Y
} .K|P&
BN\fv,
} i>tW|N
`z3|M#r\;
SortUtil： $ DDSN
} g3HoFC
package org.rut.util.algorithm; QmH/yy3.%
qE#&)
import org.rut.util.algorithm.support.BubbleSort; Kf05<J!
import org.rut.util.algorithm.support.HeapSort; 8^<c,!DM
import org.rut.util.algorithm.support.ImprovedMergeSort; vx\nr8'k
import org.rut.util.algorithm.support.ImprovedQuickSort; y3={NB+
import org.rut.util.algorithm.support.InsertSort; `d}W;&c
import org.rut.util.algorithm.support.MergeSort; qa 6=W
import org.rut.util.algorithm.support.QuickSort; ^i{,z*vi
import org.rut.util.algorithm.support.SelectionSort; Y]+e Df
import org.rut.util.algorithm.support.ShellSort; 0NL :z1N-h
>vD['XN,
/** \#\`!L[1
* @author treeroot F* 3G_V
* @since 2006-2-2 TnN^2:cU
* @version 1.0 E1c>nrnh*
*/ 9,S,NvSq
public class SortUtil { [<D+pqh
public final static int INSERT = 1; $:f.Krj
public final static int BUBBLE = 2; tk`: CT *
public final static int SELECTION = 3; 84[|qB,ML
public final static int SHELL = 4; tr}KPdE
public final static int QUICK = 5; K[Yc<Q
public final static int IMPROVED_QUICK = 6; z3^RUoGU
public final static int MERGE = 7; X+`ddX
public final static int IMPROVED_MERGE = 8; -@%t"8
public final static int HEAP = 9; U9<_6Bsd
/Y;+PAy
public static void sort(int[] data) { (oLpnjJ(,
sort(data, IMPROVED_QUICK); 9"WRIHt'c
} y0scL7/
private static String[] name={ I$aXnd6)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" yD"]{
}; s~'9Hv9
(g%JK3
private static Sort[] impl=new Sort[]{ 5*JV )[
new InsertSort(), {[Uti^)m%
new BubbleSort(), %:" RzHN
new SelectionSort(), Jq#[uX
new ShellSort(), Rz`@N`U
new QuickSort(), v\fzO#vj
new ImprovedQuickSort(), gXq!a|eH
new MergeSort(), kk 8R
new ImprovedMergeSort(), @ \!KF*v
new HeapSort() H,(F1+~d
}; 96vj)ql
-`-ACWeNV
public static String toString(int algorithm){ jv*Dg (
return name[algorithm-1]; pZu?V"R
} @kwLBAK}@
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public static void sort(int[] data, int algorithm) { N1YgYL
impl[algorithm-1].sort(data); )2)Zz +<
} ^Lsc`<xC
~J%R-{U9
public static interface Sort { L&:M8xiA~$
public void sort(int[] data); |2qR^Hd&5
} @ L\-ZWq
nped
public static void swap(int[] data, int i, int j) { lN);~|IOv7
int temp = data; PASuf.U$"
data = data[j]; H!Wis3S3G
data[j] = temp; BD hLz
} !$D&6M|C8l
} w|&,I4["