[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; V%(T#_E/6
} H:nO\]
int i1=l; o@m7@$7
int i2=mid+1; 3*T/ 7\
for(int cur=l;cur<=r;cur++){ 75pn1*"gQ
if(i1==mid+1) =Fc}T%
data[cur]=temp[i2++]; 7g5Pc_
else if(i2>r) 7z_ZD0PxPc
data[cur]=temp[i1++]; ;VzdlCZ@
else if(temp[i1] data[cur]=temp[i1++]; Q\W)}
else 8=@f lK
data[cur]=temp[i2++]; v^J']p
} HVdB*QEH
} yIf^vx_G
O2":)zU.
} |{ =Jp<}s
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改进后的归并排序: KjMwrMgC
]Q,&7D Ah
package org.rut.util.algorithm.support; ]4/C19Fe!
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import org.rut.util.algorithm.SortUtil; La28%10
k0&FUO
/** t%%zuqF`
* @author treeroot Wv%F^(R7
* @since 2006-2-2 V$wbmz
* @version 1.0 '9'f\
*/ XI:+EeM?
public class ImprovedMergeSort implements SortUtil.Sort { p(-EtxP
#F6<N]i
private static final int THRESHOLD = 10; ^?_MIS`4N
A>,kmU5
/* BUdO:fr
* (non-Javadoc) fu{v(^
* v-8{mK`9\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n^rbc;}
*/ c_,pd
public void sort(int[] data) { XZQ-Ig18
int[] temp=new int[data.length]; +vH#xc\'
mergeSort(data,temp,0,data.length-1); >Hmho'
} FRL;fF
'SXLnoeTa
private void mergeSort(int[] data, int[] temp, int l, int r) { ~.6% %1?
int i, j, k; _+)n}Se
int mid = (l + r) / 2; lfG',hlI;
if (l == r) `gF]
return; &xvNR=K[`
if ((mid - l) >= THRESHOLD) ,<C~DSAyZ
mergeSort(data, temp, l, mid); QpiDBJCL
else ]k BC,m(
insertSort(data, l, mid - l + 1); zlB[Eg^X
if ((r - mid) > THRESHOLD) I*f@M}
mergeSort(data, temp, mid + 1, r); ,Y#f0
else @\:@_}Z`_}
insertSort(data, mid + 1, r - mid); /cVZ/"
TwF.UL@G%
for (i = l; i <= mid; i++) { s'd\"WaQV
temp = data; [S-#}C?~
} QxuU3#l
for (j = 1; j <= r - mid; j++) { 6(7dr?^eGT
temp[r - j + 1] = data[j + mid]; ?!$Dr0r
} D><^7nr%
int a = temp[l]; a2]>R<M
int b = temp[r]; !HtW~8|:
for (i = l, j = r, k = l; k <= r; k++) { dj4a)p|YN
if (a < b) { {d0 rUHP
data[k] = temp[i++]; l)~$/#k
a = temp; I.>8p]X
} else { XWX]/j2jA
data[k] = temp[j--]; }jP/XO1f
b = temp[j]; {%RwZ'
} sO!m,pK(
} mVN\
} ]GsI|se
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/** hZ/p'
* @param data knfmJUT
* @param l bPkz=^-
* @param i )cL`$h4DD
*/ 3hEbM'L
private void insertSort(int[] data, int start, int len) { !w0=&/Y{R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dB QCr{7
} )>iPx.hVSS
} q0['!G%["
} b.8T<@a
} :~ &#9
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堆排序： bb+iUV|Do
ixoN#'y<"
package org.rut.util.algorithm.support; OB^j b8
&Z9rQH81f>
import org.rut.util.algorithm.SortUtil; h&!$ `)
Bt1v7M
/** u6:$AA
* @author treeroot "`4M4`'
* @since 2006-2-2 J$T(p%
* @version 1.0 o{l]n*
*/ jR+kx:+
public class HeapSort implements SortUtil.Sort{ O*n@!ye
2E!Q5 l!j
/* (non-Javadoc) \NKw,`/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g:6`1C
*/ aN6HO
public void sort(int[] data) { <^942y-=
MaxHeap h=new MaxHeap(); 9/I xh?
h.init(data); w6-<HPW<S
for(int i=0;i h.remove(); sv#b5,>9
System.arraycopy(h.queue,1,data,0,data.length); 6?JvvS5
} QBfo=9[=e
%ZDO0P !/
private static class MaxHeap{ f|3LeOyz
k@gQY_
void init(int[] data){ : &~LPmJ
this.queue=new int[data.length+1]; Pmd5P:n*,
for(int i=0;i queue[++size]=data; 8_O?#JYi
fixUp(size); ?N@[R];
} YTr+"\CkA
} [81q 0@
P{: 5i%qC
private int size=0; g+(Y)9h&
Q]$pg5O
private int[] queue; cJM.Q_I}Y
j6L(U~%
public int get() { l|;]"&|_]c
return queue[1]; 8]bLp
} T`]P5Bk8r
{.e^1qE
public void remove() { CW.T`F
SortUtil.swap(queue,1,size--); ::-*~CH)
fixDown(1); *D1vla8
} }'n]C|gZ
file://fixdown EW+QVu@
private void fixDown(int k) { WSGho(\
int j; X!@ Y,
while ((j = k << 1) <= size) { l 3 jlKB
if (j < size %26amp;%26amp; queue[j] j++; ktp<o.f[
if (queue[k]>queue[j]) file://不用交换 y'non0P.
break; %'S[f
SortUtil.swap(queue,j,k); /a6i`
k = j; iqN?'8
} QFgKEUNgl
} \m:('^\6o
private void fixUp(int k) { %8d]JQ
while (k > 1) { 3.KNAObO
int j = k >> 1; Q\btl/?
if (queue[j]>queue[k]) $\M];S=CY
break; x@[6u
SortUtil.swap(queue,j,k); jvo^I$|2h
k = j; Zq5~M bldh
} *M$'dLn
} FPM l;0{
eo.B0NZsF
} a>Zp?*9
~=|QPO(d
} ,,BWWFg~
zJ@^Bw;A^@
SortUtil： "b%FkD
Z9Z\2t
package org.rut.util.algorithm; MV07RjeS
F07X9s44E
import org.rut.util.algorithm.support.BubbleSort; c%1{l]
import org.rut.util.algorithm.support.HeapSort; yhs:.h
import org.rut.util.algorithm.support.ImprovedMergeSort; z%\&n0
import org.rut.util.algorithm.support.ImprovedQuickSort; !(Y,2{
import org.rut.util.algorithm.support.InsertSort; yT~x7,
import org.rut.util.algorithm.support.MergeSort; e*U6^Xex
import org.rut.util.algorithm.support.QuickSort; f[ia0w5 m
import org.rut.util.algorithm.support.SelectionSort; qdxaP% p2
import org.rut.util.algorithm.support.ShellSort; aPQxpK?
?-)v{4{s
/** &So1;RR,_M
* @author treeroot NB+/S;`
* @since 2006-2-2 LWhPd\
* @version 1.0 <XN=v!2;
*/ G\B+bBz
public class SortUtil { 4IvT}Us#+
public final static int INSERT = 1; "\=Phqw
public final static int BUBBLE = 2; ^)(tO$S
public final static int SELECTION = 3; [^^Pl:+
public final static int SHELL = 4; Y*S:/b~y
public final static int QUICK = 5; q alrG2
public final static int IMPROVED_QUICK = 6; o"_'cNAz
public final static int MERGE = 7; \O\q1 s~
public final static int IMPROVED_MERGE = 8; n9n)eI)R
public final static int HEAP = 9; EdkIT|c{
yc`*zLWh
public static void sort(int[] data) { S4'<kF0z
sort(data, IMPROVED_QUICK); o{^`Y
} +.OdrvN4)
private static String[] name={ 1ANb=X|hig
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k%Vprc
}; _x|.\j
,>8w|951'
private static Sort[] impl=new Sort[]{ >?rMMR+A
new InsertSort(), K[LuvS
new BubbleSort(), z?( b|v
new SelectionSort(), fc9@l a
new ShellSort(), .{} 8mFi1
new QuickSort(), !a-B=pn!]
new ImprovedQuickSort(), \4^rb?B
new MergeSort(), S!+>{JyQ
new ImprovedMergeSort(), >]~|Nf/i
new HeapSort() !?/:p.
}; j@D,2B;
4^M"V5tDx
public static String toString(int algorithm){ cD}]4
return name[algorithm-1]; p:z~>ca
} "H<us?r{
D79:L:
public static void sort(int[] data, int algorithm) { I.GoY[u_%
impl[algorithm-1].sort(data); Y[dq"
} v8j3 K
r[H8;&EL
public static interface Sort { ?Ve IlD
public void sort(int[] data); -Ou.C7ol
} Dfa3&##{
]z/R?SM
public static void swap(int[] data, int i, int j) { #j=yQrJ
int temp = data; lM{fld
data = data[j]; +a1iZ bh
data[j] = temp; x|(pmqIH+
} m<#12#D
} %0N HU`j