[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; dzA5l:5
} IX/FKSuq
int i1=l; !%w#h0(b
int i2=mid+1; D2hEI2S
for(int cur=l;cur<=r;cur++){ OPm?kr
if(i1==mid+1) Xxl>,QUA
data[cur]=temp[i2++]; )HZUCi/F]
else if(i2>r) \=n0@1Q=>
data[cur]=temp[i1++]; O<}^`4d
else if(temp[i1] data[cur]=temp[i1++]; /WIO@c
else Z)iRc$;
data[cur]=temp[i2++]; r]!<iw
} b1X.#pz7F
} nq'vq]]
?gZJ v
} a2:Tu
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改进后的归并排序: G`!ff
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package org.rut.util.algorithm.support; 7lP3\7wD@9
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import org.rut.util.algorithm.SortUtil; Rg:3}T`~n
bXN-q!
/** >;E[XG^
* @author treeroot qg7] YT&
* @since 2006-2-2 79.J`}#
* @version 1.0 5f54E|vD
*/ 8mjP2
public class ImprovedMergeSort implements SortUtil.Sort { iU)-YFO
D+ki2UVt&
private static final int THRESHOLD = 10; NW-l_]k
>v4k_JX
/* GPqF>
* (non-Javadoc) V<} ^n
* 9&'I?D&8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) , N:'Z
*/ ,gU%%>-_~w
public void sort(int[] data) { | ?6wlf
int[] temp=new int[data.length]; tE)%*z@<Lt
mergeSort(data,temp,0,data.length-1); xx}R6VKU.
} " mKMym2
KR
private void mergeSort(int[] data, int[] temp, int l, int r) { cQ4TYr;?
int i, j, k; MSEBvZ-
int mid = (l + r) / 2; wu*WA;FnA
if (l == r) Kuh! b`9
return; ]Ll<
if ((mid - l) >= THRESHOLD) Q]*YIb~D
mergeSort(data, temp, l, mid); C,C=W]G
else DdI7%?hK
insertSort(data, l, mid - l + 1); !'14mN#A
if ((r - mid) > THRESHOLD) kndP?#> p1
mergeSort(data, temp, mid + 1, r); nG#lrYZw
else ?e|'I"
insertSort(data, mid + 1, r - mid); l+'1>T.I
k&nhF9Y4
for (i = l; i <= mid; i++) { _ Ko0
temp = data; FNZB M
} _/[n/"gn
for (j = 1; j <= r - mid; j++) { l<<G".?
temp[r - j + 1] = data[j + mid]; ^qpa[6D6x
} vOYcS$,^X%
int a = temp[l]; .js4)$W^
int b = temp[r]; -;$+`<%
for (i = l, j = r, k = l; k <= r; k++) { UQ|zSalv,
if (a < b) { 7YRDQjg
data[k] = temp[i++]; =q|fe%#
a = temp; uTJi }4cw
} else { <$liWAGX\
data[k] = temp[j--]; &%pB; dk
b = temp[j]; #( nheL
} X$JO<@x
} {nQ}t }B
} BfOG e!Si
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/** Vvx(7p-GQ
* @param data $"{V],:T |
* @param l ADX}
* @param i u)P$xkf
*/ 3&*0n^g
private void insertSort(int[] data, int start, int len) { rL URP2~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y? [*qnPj
} T[))ful
} 0:G@a&Lr
} @];#4O
} MW9B -x
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堆排序： U]sU b3
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package org.rut.util.algorithm.support; ZLvw]N&R
#f|-l$a)3a
import org.rut.util.algorithm.SortUtil; o*n""m
Fc}wuW
/** 2W pe( \(
* @author treeroot EpGe'S
* @since 2006-2-2 [[D}vL8d
* @version 1.0 hk ./G'E
*/ )ymF:]QC
public class HeapSort implements SortUtil.Sort{ 89l_%To
}jU{RR%6B
/* (non-Javadoc) &3{:h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :kZ2N67
*/ p!'wOThO`
public void sort(int[] data) { 5*buRYck0
MaxHeap h=new MaxHeap(); oW]&]*>J
h.init(data); =Ak>2
for(int i=0;i h.remove(); v85&s
System.arraycopy(h.queue,1,data,0,data.length); MbnV5b:X
} zi>f436-
~s^&*KaA
private static class MaxHeap{ 7k6rhf7H
tBBN62^X
void init(int[] data){ j~DoMP5Ls
this.queue=new int[data.length+1]; pq5)Ug
for(int i=0;i queue[++size]=data; e;3$7$n Pv
fixUp(size); Lu:!vTRmw
} q\#3G
} @7lZ{jV$
jZv8X5i
private int size=0; s*k"-5
8Z3+S)6
private int[] queue; y8+?:=N.
lRt8{GFy
public int get() { 4)j<(5
return queue[1]; ]^ O<WD
} ZuS+p0H"
2L<TqC{,-
public void remove() { d+T]EpQJ*
SortUtil.swap(queue,1,size--); n]Dq
fixDown(1); L&3=5Bf9
} Tjs-+$P+
file://fixdown bT{P1nUu
private void fixDown(int k) { PLLlo~Bb
int j; >4EcV1y
while ((j = k << 1) <= size) { flLmZ1"
if (j < size %26amp;%26amp; queue[j] j++; [RpFC4W
if (queue[k]>queue[j]) file://不用交换 Y_/Kd7,\~
break; `MTOe1
SortUtil.swap(queue,j,k); '&<-,1^L
k = j; Zl,K#
} OD1ns
} r)j#Skh].
private void fixUp(int k) { R:.7c(s
while (k > 1) { ^\+6*YE 4
int j = k >> 1; I:6xDDpZG`
if (queue[j]>queue[k]) KktTR`W
break; RM<\bZPc
SortUtil.swap(queue,j,k); M2xUs
k = j; bkOm/8k|4
} 5 #kvb$97
} !d(!1fC
5h{Hf]A
} LnJ7i"Q
coLn};W2
} 0>e>G(4(8
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SortUtil： BK /;HG
19#)# n^
package org.rut.util.algorithm; a|s=d
[\.>BK
import org.rut.util.algorithm.support.BubbleSort; gdG: &{|x
import org.rut.util.algorithm.support.HeapSort; ))KsQJ"V
import org.rut.util.algorithm.support.ImprovedMergeSort; Z#J{tXZc
import org.rut.util.algorithm.support.ImprovedQuickSort; 'xi..
import org.rut.util.algorithm.support.InsertSort; '6WDs]\
import org.rut.util.algorithm.support.MergeSort; rLKDeB
import org.rut.util.algorithm.support.QuickSort; z:fhq:R(
import org.rut.util.algorithm.support.SelectionSort; U_8I$v-~
import org.rut.util.algorithm.support.ShellSort; }bnkTC
Xr)d;@yi
/** pH~JPNng
* @author treeroot gRqz8UI
* @since 2006-2-2 {W4t]Ff
* @version 1.0 {(MG: B
*/ 1b!l+ 8!
public class SortUtil { cEQa 6
public final static int INSERT = 1; AMm O+E?
public final static int BUBBLE = 2; #&5\1Qu
public final static int SELECTION = 3; r=[}7N
public final static int SHELL = 4; 9=}/t9k
public final static int QUICK = 5; /6.b>|zF
public final static int IMPROVED_QUICK = 6; JWdG?[$
public final static int MERGE = 7; /nmfp&@
public final static int IMPROVED_MERGE = 8; +es6c')
public final static int HEAP = 9; %4-pw|':
hBqu,A
public static void sort(int[] data) { U&/S
sort(data, IMPROVED_QUICK); >S3 >b
} @"EX%v.
private static String[] name={ ;yXnPAtJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <?7~,#AK
}; X'F$K!o*,:
Uh8ieb
private static Sort[] impl=new Sort[]{ 7>mYD3
new InsertSort(), ,Z^GN%Q7a
new BubbleSort(), V9bLm,DtT
new SelectionSort(), }wb;ulN)
new ShellSort(), 1`AE]
new QuickSort(), DtS{iH=s]
new ImprovedQuickSort(), A3$b_i@P
new MergeSort(), #3$|PM7,_
new ImprovedMergeSort(), 0`thND)?O
new HeapSort() _ o(h]G1].
}; lyeoSd1AN
;7A,'y4f
public static String toString(int algorithm){ "O 'I
return name[algorithm-1]; ;C<A}
} SYwNx">Bq
;(,Fe/wvC
public static void sort(int[] data, int algorithm) { aRwBxf
impl[algorithm-1].sort(data); 'ng/A4
} vJ' 93h
LYFvzw>M
public static interface Sort { 4>HGwk@+8
public void sort(int[] data); sP |i'
} CUG<v3\
tSYnc7
public static void swap(int[] data, int i, int j) { ]mh+4k?b
int temp = data; ]>,|v,i =
data = data[j]; ]z%9Q8q'
data[j] = temp; 1mV0AE538
} 6;*(6$;
} TExlGAHo+O