[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; (Ys0|I3
} "zfy_h
int i1=l; }6`#u:OZ
int i2=mid+1; ktnsq&qNL
for(int cur=l;cur<=r;cur++){ s %/3X\_
if(i1==mid+1) s+,JwV?b
data[cur]=temp[i2++]; iielAj*b
else if(i2>r) ho 4~-xmN
data[cur]=temp[i1++]; fi`*r\
else if(temp[i1] data[cur]=temp[i1++]; ~r+;i,,X
else T2GJoJ!
data[cur]=temp[i2++]; %vgn>A?]1
} 7N 7W0Ky
} 8H;yrNL
Ee^2stc-
} V4iN2
=#^\9|?$
改进后的归并排序: ("ql//SL
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package org.rut.util.algorithm.support; y@e/G3
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import org.rut.util.algorithm.SortUtil; >E6w,Ab
p{NVJ^!+
/** m>DBO|`
* @author treeroot gM&XVhQJ\
* @since 2006-2-2 )$XcO]
* @version 1.0 \9jEpE^Ju(
*/ TZ3"u@ 06
public class ImprovedMergeSort implements SortUtil.Sort { /5pVzv+rm
/{|JQ'gqX
private static final int THRESHOLD = 10; tP^2NTs%]
&C6Z-bS"
/* n Hz Xp:"
* (non-Javadoc) @T)kqT
* RR |Z,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9=TjSRS
*/ wF[%+n (*
public void sort(int[] data) { a'r8J~:jy
int[] temp=new int[data.length]; *:}9(8d
mergeSort(data,temp,0,data.length-1); m -]E|
} zsOOx% +
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private void mergeSort(int[] data, int[] temp, int l, int r) { L.X"wIs^
int i, j, k; +`=rzL"0I7
int mid = (l + r) / 2; bWv2*XC
if (l == r) b v5BV
return; rU/8R'S
if ((mid - l) >= THRESHOLD) @^R6}qJ
mergeSort(data, temp, l, mid); 29z$z$l4
else %1h%#/#[
insertSort(data, l, mid - l + 1); 1K\zamBg
if ((r - mid) > THRESHOLD) >=O5=\`
mergeSort(data, temp, mid + 1, r); p.)IdbC`B
else e>J.r("f
insertSort(data, mid + 1, r - mid); #7v=#Jco
eU(cn8/}
for (i = l; i <= mid; i++) { r?7tI0
temp = data; mM(Z8PA9-
} a1#",%{I
for (j = 1; j <= r - mid; j++) { 6 H{G$[2
temp[r - j + 1] = data[j + mid]; ?hBjq
} ,)?!p_*@:
int a = temp[l]; d RIuA)0s
int b = temp[r]; dj-/%MU
for (i = l, j = r, k = l; k <= r; k++) { *{x8@|K8
if (a < b) { 9KCeKT>v
data[k] = temp[i++]; '"C& dia
a = temp; XmJ?oPr7
} else { FeL!%z
data[k] = temp[j--]; fD3>g{
b = temp[j]; F rd>+
} {&TP&_|H
} Fe1^9ja
} %t*KP=@
6qR5A+|;
/** >zX`qv&>
* @param data j4%\'xj:
* @param l 4OOI$J$Jh
* @param i 7<0oK|~c#
*/ o)WzZ,\F^J
private void insertSort(int[] data, int start, int len) { ?Gx-q+H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BN1,R] *;
} 7hlzuZob+y
} Ju-#F@38
} OE/r0C<&
} n#PXMD*
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堆排序： *4y0Hq
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package org.rut.util.algorithm.support; #]'V#[;~
v m$v[
import org.rut.util.algorithm.SortUtil; ujSzm=_P
nbRg<@
/** 7xcYM
* @author treeroot @]7\.>)
* @since 2006-2-2 =0-qBodbl
* @version 1.0 x~z 2l#ow
*/ axl?t|~I
public class HeapSort implements SortUtil.Sort{ R.QcXz?d
`ya;:$(6
/* (non-Javadoc) .Qt4&B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nzX@:7g
*/ g^kx(p<u`
public void sort(int[] data) { ,pq{& A
MaxHeap h=new MaxHeap(); [O-sVYB
h.init(data); \'19BAm'
for(int i=0;i h.remove(); Aox3s?
System.arraycopy(h.queue,1,data,0,data.length); <Wl(9$
} (I{ $kB"p
tPHS98y
private static class MaxHeap{ V'Qn sI
|'HLz=5\
void init(int[] data){ YpdNX.P,
this.queue=new int[data.length+1]; AyE\fY5
for(int i=0;i queue[++size]=data; vxN0,l
fixUp(size); lm'Zy"~::
} !- ~X?s~L
} OQlG+|
Z&!!]"I
private int size=0; "oc$
}4%/pOi:f
private int[] queue; 8{&["?
F=@i6ERi
public int get() { i4Z4xTn
return queue[1]; ^E>CGGS4
} sLcY,AH
^!:"Q3
public void remove() { ?~ULIO'
SortUtil.swap(queue,1,size--); 2%rLoL$Y2+
fixDown(1); #]KgUc5B
} N=,j}FY
file://fixdown oJ;rc{n-
private void fixDown(int k) { _Sj}~H
int j; ysXx%k
while ((j = k << 1) <= size) { b#Kq[}
if (j < size %26amp;%26amp; queue[j] j++; u>cC O'q
if (queue[k]>queue[j]) file://不用交换 Ya4?{2h@+
break; OHp5z? z
SortUtil.swap(queue,j,k); {E,SHh
k = j; 9q4_j
} H30OUrD
} #n})X,ip2
private void fixUp(int k) { E'dX)J9e$/
while (k > 1) { d!{7r7ob\
int j = k >> 1; DvT+`X?R
if (queue[j]>queue[k]) VQ |^
break; we]>(|
SortUtil.swap(queue,j,k); yqcM(,0]
k = j; juno.$ 6
} f~\Xg7<
} .|]IwyD &
&IQ%\W#aY
} F1u)i
70iH0j)
} QUP|FIpZ
YF[$Q=7.
SortUtil： E <@\>y.[
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package org.rut.util.algorithm; *TnzkNN_,
%Y',|+Arx
import org.rut.util.algorithm.support.BubbleSort; 3V-6)V{KaE
import org.rut.util.algorithm.support.HeapSort; i>GdRG&q
import org.rut.util.algorithm.support.ImprovedMergeSort; k,_i#9X
import org.rut.util.algorithm.support.ImprovedQuickSort; L+R>%d s
import org.rut.util.algorithm.support.InsertSort; XS/n>C
import org.rut.util.algorithm.support.MergeSort; nPf'ee
import org.rut.util.algorithm.support.QuickSort; Vipp /WV
import org.rut.util.algorithm.support.SelectionSort; YX;nMyD?~
import org.rut.util.algorithm.support.ShellSort; fOBN=y6x
w6U @tW
/** P6HGs? *
* @author treeroot 5P\N"Yjx'
* @since 2006-2-2 AN10U;p/O
* @version 1.0 HDj$"pS
*/ /co%:}ln
public class SortUtil { TcZN%
public final static int INSERT = 1; x7gjG"V
public final static int BUBBLE = 2; gb_X?j%p7
public final static int SELECTION = 3; ay[ZsQC
public final static int SHELL = 4; ysth{[<5F3
public final static int QUICK = 5; 9HKf^+';n
public final static int IMPROVED_QUICK = 6; #~e9h9
public final static int MERGE = 7; #Q+R%p[D
public final static int IMPROVED_MERGE = 8; |Mlh;
public final static int HEAP = 9; DPeVKyjU
7vNtv9
public static void sort(int[] data) { s!`H
sort(data, IMPROVED_QUICK); 8r^j P.V
} >;}]pI0T
private static String[] name={ Lupy:4AD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aH^{Vv$]M@
}; x\]z j!
$kv[iI@
private static Sort[] impl=new Sort[]{ /&QQ p3
new InsertSort(), nrbazyKm
new BubbleSort(), _/Tlqzp
new SelectionSort(), 3.~h6r5-
new ShellSort(), fO+UHSC
new QuickSort(), D+hB[*7Fs
new ImprovedQuickSort(), ' 3VqkQ4
new MergeSort(), /x O{ .dr
new ImprovedMergeSort(), iP,v=pS6
new HeapSort() A?' H[2]w"
}; )^(P@D.L
A`Q >h{
public static String toString(int algorithm){ &58 {
return name[algorithm-1]; R9q0,yQW
} 'tut4SwC
NuU'0_")/
public static void sort(int[] data, int algorithm) { ~32Pjk~
impl[algorithm-1].sort(data); 3&es]1b
} W1vCN31
mc?';dEG
public static interface Sort { mA&=q_gS
public void sort(int[] data); Hk,lX r
} D9~}5
Q6=MS>JW]w
public static void swap(int[] data, int i, int j) { o]A XT8
int temp = data; \M9h&I\7
data = data[j]; )o{VmXe@@
data[j] = temp; -Q#o)o
} Q uB+vL
} @rF/]UJ