[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; 9':/Sab:7v
} oAaf)?8
int i1=l; H<XlUCr_~+
int i2=mid+1; E)Srj~$d
for(int cur=l;cur<=r;cur++){ Z>&K&ttJ
if(i1==mid+1) 3r`<(%\
data[cur]=temp[i2++]; .5NZf4:C
else if(i2>r) SKW;MVC
data[cur]=temp[i1++]; {<r`5
else if(temp[i1] data[cur]=temp[i1++]; GeVc\$K-
else @~hz_Nm@8
data[cur]=temp[i2++]; Q84t9b
} %^T!@uZr
} rX:1_q`xA
38"cbHE3
} n{3|E3
L*v93;|s
改进后的归并排序: \wFhTJY
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package org.rut.util.algorithm.support; ze ?CoDx2
tbY SK
import org.rut.util.algorithm.SortUtil; =:;YTie
xp(mB7;:
/** HI z9s4Y_
* @author treeroot $CM4&{B"i
* @since 2006-2-2 [C2kK *JZ
* @version 1.0 }pt-q[s>
*/ AsD1-$
public class ImprovedMergeSort implements SortUtil.Sort { $=lJG(2%
"`[$&:~
private static final int THRESHOLD = 10; O8iu+}]/6
1aVgwAI
/* ThbP;CzI#
* (non-Javadoc) (%.</|u
* EtJD'&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GgT=t)}wu
*/ 48;~bVr}
public void sort(int[] data) { 6S)$3Is
int[] temp=new int[data.length]; `TOX1cmw
mergeSort(data,temp,0,data.length-1); )S#j.8P'B
} coSTZ&0
FRc |D
private void mergeSort(int[] data, int[] temp, int l, int r) { y. Tct.
int i, j, k; > e;]mU`,
int mid = (l + r) / 2; +B](5z4
if (l == r) "\}21B~{7'
return; ]gEu.Nth`
if ((mid - l) >= THRESHOLD) ipfm'aQ
mergeSort(data, temp, l, mid); T4l-sJ'|
else k-io$
insertSort(data, l, mid - l + 1); $,g 3*A
if ((r - mid) > THRESHOLD) BSjbnnW}"
mergeSort(data, temp, mid + 1, r); 8Er[M
else 7G?Ia%u
insertSort(data, mid + 1, r - mid); y{:]sHyG
PMD,8]|
for (i = l; i <= mid; i++) { X E!2Q7Q9
temp = data; dy'X<o^?W
} P"2Q&M_/
for (j = 1; j <= r - mid; j++) { .&Y,D-h}7|
temp[r - j + 1] = data[j + mid]; p_A5C?&
} 4{g:^?1=
int a = temp[l]; /E;;j9
int b = temp[r]; Wn2Ny jX
for (i = l, j = r, k = l; k <= r; k++) { ]j72P
if (a < b) { 2lX[hFa5
data[k] = temp[i++]; vI4%d,
a = temp; 'M47'{7T
} else { sb8z_3
data[k] = temp[j--]; <XU8a:w'T
b = temp[j]; h5<T.vV
} dCW0^k
} >N :|Km\
} \,$r,6-g
nomu$|I
/** InAU\! ew
* @param data yp( ?1
* @param l b/T20F{W\o
* @param i i0i.sizu
*/ 5?<|3
private void insertSort(int[] data, int start, int len) { h4J{jh.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FZM ]o
} "cIGNTLFA
} ?3.(Vqwog
} ^A:!ni@3
} [_B+DD=}
8L%%eM_O
堆排序： 2nG{>,#C:O
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package org.rut.util.algorithm.support; i=,B88ko
~ra#UG\Y8
import org.rut.util.algorithm.SortUtil; 6RR4L^(m
e);bF>.~
/** ,Zf :R
* @author treeroot O6M}W_
* @since 2006-2-2 >u'/$k
* @version 1.0 >#Grf)@"6
*/ azz#@f1
public class HeapSort implements SortUtil.Sort{ GGFar\ EzW
DQL06`pX/
/* (non-Javadoc) KIXwx98
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o06A=4I
*/ 'vqj5YTj
public void sort(int[] data) { AH"g^ gw~T
MaxHeap h=new MaxHeap(); XhJP87A
h.init(data); ]1YYrgi7
for(int i=0;i h.remove(); gOBj0P8s|}
System.arraycopy(h.queue,1,data,0,data.length); ;m2"cL>{l
} }I` ku.@5
J)#59a
private static class MaxHeap{ :)^# xE(
&>+I7Ts]
void init(int[] data){ 6qz!M
this.queue=new int[data.length+1]; ?NL&x
for(int i=0;i queue[++size]=data; EF*oPn0|
fixUp(size); X_^_r{
} luP'JUq
} )]0[`iLe
]4LT#
private int size=0; Yc. ~qmG/z
-eSPoZ
private int[] queue; mGMinzf
m!FM+kge
public int get() { iXr`0V
return queue[1]; 2@=cqD7x
} <;TP@-a
;XKo44%
public void remove() { pqGf@24c<
SortUtil.swap(queue,1,size--); c_D,MW\IC
fixDown(1); oHc-0$eMKY
} c(_oK ?
file://fixdown os"[Iji
private void fixDown(int k) { ?%8})^Dd>4
int j; Q(!}t"u
while ((j = k << 1) <= size) { Kq@m?h
if (j < size %26amp;%26amp; queue[j] j++; [Ls2k&)0
if (queue[k]>queue[j]) file://不用交换 7DC0W|Fe
break; 2>_brz|7:|
SortUtil.swap(queue,j,k); IlC:dA
k = j; 32)&;
} \$$b",2 h
} F$sF 'cw
private void fixUp(int k) { I;kUG_c(4
while (k > 1) { P?3YHa^up
int j = k >> 1; V5(tf'
if (queue[j]>queue[k]) 5~kW-x
break; `o^;fcnG
SortUtil.swap(queue,j,k); 2yCd:wg
k = j; T9XW%/n
} J1u@A$4l?
} f)ucC$1=
~(l2%(3G
} CHdet(_=v
r['=a/.C
} F]dd>#
yv#c=v|
SortUtil： hq&
j 44bF/
package org.rut.util.algorithm; nIN%<3U2
YiQeI|{oN
import org.rut.util.algorithm.support.BubbleSort; .T62aJ
import org.rut.util.algorithm.support.HeapSort; X T)hPwg.
import org.rut.util.algorithm.support.ImprovedMergeSort; @88z{
import org.rut.util.algorithm.support.ImprovedQuickSort; cQ8$,fo
import org.rut.util.algorithm.support.InsertSort; _nIqy&<
import org.rut.util.algorithm.support.MergeSort; 4LB9w21
import org.rut.util.algorithm.support.QuickSort; f@xfb ie!
import org.rut.util.algorithm.support.SelectionSort; k1LtqV
import org.rut.util.algorithm.support.ShellSort; 4 L~;>]7
M#8Ao4 T
/** X~Rk ,d3
* @author treeroot !=q:>}g
* @since 2006-2-2 '#An+;x{
* @version 1.0 ;&t1FH#=
*/ _]PfeCn:j
public class SortUtil { YVg}q#
public final static int INSERT = 1; Dry;$C}P
public final static int BUBBLE = 2; i1_>>49*
public final static int SELECTION = 3; Kj1#R
public final static int SHELL = 4; D0E"YEo\nv
public final static int QUICK = 5; 6UzT]"LR;
public final static int IMPROVED_QUICK = 6; >Wr
public final static int MERGE = 7; :v WYII7
public final static int IMPROVED_MERGE = 8; @D=2Er\
public final static int HEAP = 9; Gad2EEZ%0
[&O:qaD^
public static void sort(int[] data) { a*n%SUP
sort(data, IMPROVED_QUICK); :x*|lz[
} ]rX?n
private static String[] name={ }9+1<mT9a/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]Buk9LTe
}; *l'$pJ X
/cg]wG!n8
private static Sort[] impl=new Sort[]{ $et :
new InsertSort(), @,>=X:7
new BubbleSort(), ~|B!.+
new SelectionSort(), &T{B~i3w8
new ShellSort(), R82Zr@_
new QuickSort(), *O}'2Ht6\
new ImprovedQuickSort(), M]/wei"X
new MergeSort(), .V)2Tz
new ImprovedMergeSort(), G4J6
new HeapSort() _ry En
}; !k??Kj
DRg~HT
public static String toString(int algorithm){ Tdmo'"m8z_
return name[algorithm-1]; ,%b1 ]zZQ
} (.nJT"&
4kY{X%9
public static void sort(int[] data, int algorithm) { e#eO`bT
impl[algorithm-1].sort(data); ^N}~U5
} <+1w'-
ZD] '$
public static interface Sort { q$2taG}
public void sort(int[] data); *,*:6^t
} -Fw4;&>
bHo?Rw!.
public static void swap(int[] data, int i, int j) { RKJWLofX&
int temp = data; &=yqWW?
data = data[j]; eiSO7cGy
data[j] = temp; d8q$&(]<
} fjZveH0
} [j+0EVwB