[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; zy'D!db`Z
} 9nSWE W
int i1=l; wBk@F5\<
int i2=mid+1; 0ZpFE&
for(int cur=l;cur<=r;cur++){ Ddju~510
if(i1==mid+1) 25y6a|`
data[cur]=temp[i2++]; Ucw yxXI
else if(i2>r) _Xcn N:Rt
data[cur]=temp[i1++]; `YBkF
else if(temp[i1] data[cur]=temp[i1++]; Y4.Eq+$gh
else GwU?wIIj^
data[cur]=temp[i2++]; e$)300 o
} 6X2PYJJZ
} uGU;Y'W)
* *H&+T/B
} $:s`4N^
}R4c
改进后的归并排序: cE'L% Z
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package org.rut.util.algorithm.support; 0U/,aHvhP
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import org.rut.util.algorithm.SortUtil; #K\?E.9h
!9iGg*0dx
/** 58xnB!h\}
* @author treeroot %(/!ljh_
* @since 2006-2-2 VZn=rw
* @version 1.0 7%?jL9Vw
*/ _,74)l1
public class ImprovedMergeSort implements SortUtil.Sort { yF._*9Q3hK
FyoEQ%.bI
private static final int THRESHOLD = 10; oEz%={f
BG&cQr
/* `?(Bt|<>
* (non-Javadoc) {:nQl}
* ,|?CU r9Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]q5`YB%_
*/ 3uu~p!2
public void sort(int[] data) { <bck~E
int[] temp=new int[data.length]; &QX`NO6
mergeSort(data,temp,0,data.length-1); e?0q9W
} Z(>'0]G
#:x4DvDkR
private void mergeSort(int[] data, int[] temp, int l, int r) { 2aA`f7
int i, j, k; Uggw-sRU
int mid = (l + r) / 2; ~tFqb<n
if (l == r) <|Yj%f
return; qZEoiNH(Tj
if ((mid - l) >= THRESHOLD) %6%<?jZ
mergeSort(data, temp, l, mid); W/ay.I
else Z=5qX2fy1*
insertSort(data, l, mid - l + 1); m(iR|Zx
if ((r - mid) > THRESHOLD) 4M&`$Wim
mergeSort(data, temp, mid + 1, r); qGmNz}4D5
else X.F^$
insertSort(data, mid + 1, r - mid); g.JN_t5
x"P);su
for (i = l; i <= mid; i++) { <N,)G |&
temp = data; /Ss7"*JLe
} %h"z0@+
for (j = 1; j <= r - mid; j++) { d'6|:z9c
temp[r - j + 1] = data[j + mid]; w@\vHH.;V
} (UCK;k
int a = temp[l]; Qcjc,
int b = temp[r]; x3ERCqTR
for (i = l, j = r, k = l; k <= r; k++) { 5l-mW0,MK
if (a < b) { YT/kC'A
data[k] = temp[i++]; PYRd]%X
a = temp; ^I6^g
} else { zjL.Bhiud
data[k] = temp[j--]; ^&/G|
b = temp[j]; jDM w2#<
} spofLu.
} ;{[>&4
} ~9\WFF/
\qvaE+
/** u}bf-;R
* @param data ow=UtA-^O
* @param l Si9Z>MR
* @param i Q^K"8 ;
*/ ]{~NO{0@Y
private void insertSort(int[] data, int start, int len) { [[~w0G~1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P|2E2=G
} %Pqk63QF
} j;_c+w!P
} Q zZ;Ob]'
} Z4$cyL'$P
[ =x s4=
堆排序： Rv,JU6>i
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package org.rut.util.algorithm.support; )Rat0$6
8n BL\{'B[
import org.rut.util.algorithm.SortUtil; Ioy
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/** Zc |/{$>:W
* @author treeroot CBQhIvq.d
* @since 2006-2-2 SQ,?N XZ
* @version 1.0 <!$:8ls
*/ (KZHX5T=
public class HeapSort implements SortUtil.Sort{ dm"n%
[ao U5;7
/* (non-Javadoc) O|A_PyW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;R=.iOn
*/ LLWB
public void sort(int[] data) { AB Xl
MaxHeap h=new MaxHeap(); x6afI<dm
h.init(data); UX<Qcjm$e
for(int i=0;i h.remove(); +bK.NcS
System.arraycopy(h.queue,1,data,0,data.length); ^ 5VK>
} GhY1k";
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private static class MaxHeap{ 'Djm0
*tOG*hwdT
void init(int[] data){ GT hL/M
this.queue=new int[data.length+1]; /:6Wzj
for(int i=0;i queue[++size]=data; C.^Ven
fixUp(size); +t4BQf
} {k.MS-q
} iz(u=/*\
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private int size=0; N!Qg;(
WD;Y~|
private int[] queue; z|7zj/+g
~m1P_`T
public int get() { b96%")
return queue[1]; B()/.w?A
} fW`&'!
kY,U8a3!
public void remove() { 1CPjil*eb
SortUtil.swap(queue,1,size--); DcMJ^=r8O:
fixDown(1); vB37M@wm
} G1t\Q-|l0
file://fixdown p_ Fy>j
private void fixDown(int k) { ]Q "p\@\!
int j; )2UZ% ?V#
while ((j = k << 1) <= size) { IvpcSam'
if (j < size %26amp;%26amp; queue[j] j++; %;D+k
if (queue[k]>queue[j]) file://不用交换 k *R<,
break; 4ww]9J
SortUtil.swap(queue,j,k); )5%C3/Dl!
k = j; 6*l^1;U
} cH<q:OYi
} VKm!Ri$
private void fixUp(int k) { FVv8--
while (k > 1) { 4$/i%B#ad
int j = k >> 1; ~.PO[hC
if (queue[j]>queue[k]) 2M)]!lYy
break; H$ftGwS8
SortUtil.swap(queue,j,k); [ rNXQ`/
k = j; wdzOFDA
} k{tMzx]F__
} I9o6k?$K
bW#@OrsS
} wiOgyMdx
4RKW
} PUQES(&
4GG>!@|
SortUtil： C=uZ1xg*,
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package org.rut.util.algorithm; 2;L|y._`w
!$A37j6
import org.rut.util.algorithm.support.BubbleSort; m`4R]L]
import org.rut.util.algorithm.support.HeapSort; 'B83m#HR#
import org.rut.util.algorithm.support.ImprovedMergeSort; @ P@c.*}s
import org.rut.util.algorithm.support.ImprovedQuickSort; %puLr'Y
import org.rut.util.algorithm.support.InsertSort; #tt?!\8C
import org.rut.util.algorithm.support.MergeSort; \JG8KE=j
import org.rut.util.algorithm.support.QuickSort; <";,GaZQ
import org.rut.util.algorithm.support.SelectionSort; t3Z_Dp~\
import org.rut.util.algorithm.support.ShellSort; uUE9g
UV}73Sp
/** 5ep/h5*/
* @author treeroot gu)=wu0
* @since 2006-2-2 }],Z;:
* @version 1.0 WqxUXH
*/ *BD=O@
public class SortUtil { 1\RGM<q$f
public final static int INSERT = 1; M:Er_,E
public final static int BUBBLE = 2; |W$DVRA
public final static int SELECTION = 3; l5Y/Ok0,
public final static int SHELL = 4; nfb]VN~(
public final static int QUICK = 5; It_M@
public final static int IMPROVED_QUICK = 6; @=w<B4L
public final static int MERGE = 7; `=#01YX[0
public final static int IMPROVED_MERGE = 8; a m-b!l!q^
public final static int HEAP = 9; 53QfTP
]U[X1W+@
public static void sort(int[] data) { JJV0R}z?TV
sort(data, IMPROVED_QUICK); o sbHs$C
} bf_I9Z3m
private static String[] name={ NRnRMY-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0U66y6
}; )PkNWj6%y
Xf=XBoN|
private static Sort[] impl=new Sort[]{ H-rWDN#
new InsertSort(), |6J ?8y
new BubbleSort(), 4@ILw
new SelectionSort(), |{g+Y
new ShellSort(), #5sD{:f`
new QuickSort(), bLz*A-
new ImprovedQuickSort(), kH*Pn'
new MergeSort(), 3`hUo5K
new ImprovedMergeSort(), >idBS
new HeapSort() ezhDcI_T
}; [MX;,%;;
?!w^`D0}o
public static String toString(int algorithm){ 6nDV1O5
return name[algorithm-1]; L+B?~_*
} OYM@szM
=9L$L|W
public static void sort(int[] data, int algorithm) { Uu6L~iB
impl[algorithm-1].sort(data); CZ2`H[8
} M"q[p
"%WgT2)m.
public static interface Sort { 0)YbI!
public void sort(int[] data); Nd:R" p*8
} \u`)kJ5o1
:Ud[f`t
public static void swap(int[] data, int i, int j) { ]u-SL md
int temp = data; :&}odx!-!C
data = data[j]; ci,+Bjc
data[j] = temp; fkfZ>D^1
} ?wMHS4
} K*K1(_x=