[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; kL|\wci
} Y.7}
int i1=l; ((qGh>*
int i2=mid+1; ?b56AE
for(int cur=l;cur<=r;cur++){ -OWZ6#v(
if(i1==mid+1) QCWf.@n
data[cur]=temp[i2++]; n,CD
else if(i2>r) P7Xg{L&@.
data[cur]=temp[i1++]; Y17hOKc`
else if(temp[i1] data[cur]=temp[i1++]; opXDm\
else Apmw6cc
data[cur]=temp[i2++]; %yfE7UPS]
} RpYcD
} 19p8B&
_B3zRO
} 9p4y>3
D*QYKW=)
改进后的归并排序: )&:L'N
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package org.rut.util.algorithm.support; eQ;Q4
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import org.rut.util.algorithm.SortUtil; >g]ON9CGH
|4fF T `
/** aBxiK[[`
* @author treeroot b# u8\H
* @since 2006-2-2 +Ofa#^5);K
* @version 1.0 /OG zt
*/ m*dNrG
public class ImprovedMergeSort implements SortUtil.Sort { y^R4I_* z
6e.[,-eU
private static final int THRESHOLD = 10; hF>u)%J/S
UV@0gdy[
/* `eR 7H>I
* (non-Javadoc) Xb,T{.3@
* Ac`;st%l.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A[)C:q,
*/ "%@v++4y
public void sort(int[] data) { -ihiG_f
int[] temp=new int[data.length]; v+6e;xl8
mergeSort(data,temp,0,data.length-1); 4MLH+/e
} <#*.}w~
! %Ny0JkO
private void mergeSort(int[] data, int[] temp, int l, int r) { ^2C>L}
int i, j, k; $FX,zC<=
int mid = (l + r) / 2; R5(T([w'
if (l == r) >{nH v)
return; T$P-<s
if ((mid - l) >= THRESHOLD) {v,)G)obWw
mergeSort(data, temp, l, mid); Y3rt5\!
else dYF=c
insertSort(data, l, mid - l + 1); 3i=Iu0
if ((r - mid) > THRESHOLD) r,;\/^u*
mergeSort(data, temp, mid + 1, r); N'?u1P4G
else {dzoEM[ 1s
insertSort(data, mid + 1, r - mid); pj8azFZ
f<=Fe:1.
for (i = l; i <= mid; i++) { yWb4Ify
temp = data; Bp_wnd
} k\aK?(.RC7
for (j = 1; j <= r - mid; j++) { ;;#`#v
temp[r - j + 1] = data[j + mid]; v~=\H
} LW:1/w&pv
int a = temp[l]; ^+/kr/
int b = temp[r]; Gquuy7[&
for (i = l, j = r, k = l; k <= r; k++) { T?wzwGp-[
if (a < b) { lm0N5(XP
data[k] = temp[i++]; q.V-LXM
a = temp; w/m:{cHk
} else { \?lz&<
data[k] = temp[j--]; 8Vn4.R[vE
b = temp[j]; +!yXTC
} <<zI\+V
} |J>WC}g@n
} #b)e4vwCq
l"pN90B4
/** i.y)mcB4
* @param data vHKlLl>*2
* @param l o\=n4;S
* @param i #wR;|pN
*/ D4u%6R|F
private void insertSort(int[] data, int start, int len) { Q[u6|jRt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TqAPAHg
} uGVy6,
} \RG!@$i
} *?% k#S
} n/Dp"4H%q
!0}\&<8/m
堆排序： s8mr''
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package org.rut.util.algorithm.support; A\sI<WrH
+OHGn;C
import org.rut.util.algorithm.SortUtil; K[?Xm"4
\2e0|)aF6
/** 9pSUIl9|j
* @author treeroot F-gE<<
* @since 2006-2-2 H=^K@Ti:
* @version 1.0 !CY&{LEYn0
*/ E-2eOT
public class HeapSort implements SortUtil.Sort{ 7jG(<!,
,H kj1x
/* (non-Javadoc) sM2MLh'D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \2v"YVWw
*/ 2I'~2o
public void sort(int[] data) { 9$*s8}|
MaxHeap h=new MaxHeap(); SZU \i*
h.init(data); V9%aBkf8w
for(int i=0;i h.remove(); t*S." q
System.arraycopy(h.queue,1,data,0,data.length); 8At<Wic
} E8[T
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private static class MaxHeap{ }j{!-&
-G|a*^
void init(int[] data){ Dt}rR[yJ
this.queue=new int[data.length+1]; 3`.P'Fh(k
for(int i=0;i queue[++size]=data; `)$_YZq|SR
fixUp(size); 2[yBD-":
} X@A1#z+s0]
} -7qIToO.
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private int size=0; B9dt=j3j2
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private int[] queue; 15\Ph[6g
7A$B{
public int get() { ^eq</5q D
return queue[1]; bCv{1]RC2
} 9"{W,'r&d
W&Y"K)`
public void remove() { u,.3
SortUtil.swap(queue,1,size--); [#^#+ |{\
fixDown(1); 3(E $I5
} Rqipkx
file://fixdown +a@GHx4-
private void fixDown(int k) { QP@<)`1t9
int j; %:v`EjRD0
while ((j = k << 1) <= size) { YNdrWBf)
if (j < size %26amp;%26amp; queue[j] j++; $D1w5o-
if (queue[k]>queue[j]) file://不用交换 C@\{ehG
break; 3 fj
SortUtil.swap(queue,j,k); ~EiH-z4U
k = j; Nh?|RE0t
} <!d"E@%v@
} 6]cryf&b
private void fixUp(int k) { ;i uQ?MR3
while (k > 1) { `TqSQg_l
int j = k >> 1; Yf_6PGNzX
if (queue[j]>queue[k]) z`Wt%tL(
break; ;Y9=!.Ak0y
SortUtil.swap(queue,j,k); DPgm%Xq9(!
k = j; d[gl]tj9
} B:TR2G9UT
} !v|ISyK
X?r48l??
} RF}X ER
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} q}|U4MJm
% ~]xuP[
SortUtil： +ZsX*/TOn
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package org.rut.util.algorithm; 9;t]Hp_+K
^WYQ]@rh3
import org.rut.util.algorithm.support.BubbleSort; \p&~,%
import org.rut.util.algorithm.support.HeapSort; : 9!%ZD
import org.rut.util.algorithm.support.ImprovedMergeSort; [onqNp
import org.rut.util.algorithm.support.ImprovedQuickSort; | $^;wP
import org.rut.util.algorithm.support.InsertSort; GV|9H]_,I
import org.rut.util.algorithm.support.MergeSort; b8KsR=]4I
import org.rut.util.algorithm.support.QuickSort; *O$CaAr\s
import org.rut.util.algorithm.support.SelectionSort; &[R8Q|1j
import org.rut.util.algorithm.support.ShellSort; VL+C&k v]
mdih-u(T|
/** 4R%*Z~
* @author treeroot t@oK~ Nr
* @since 2006-2-2 H!IshZfktn
* @version 1.0 u0)7i.!M
*/ PaB!,<A
public class SortUtil { zJlQ_U-!
public final static int INSERT = 1; kYwb -;
public final static int BUBBLE = 2; '(+<UpG_Q}
public final static int SELECTION = 3; -<_$m6x"A
public final static int SHELL = 4; yBed kj
public final static int QUICK = 5; u`:hMFTID
public final static int IMPROVED_QUICK = 6; 3:/'n
public final static int MERGE = 7; ;$j7H&UNQj
public final static int IMPROVED_MERGE = 8; J'&#mDU
public final static int HEAP = 9; gYop--\14]
4\5uY
public static void sort(int[] data) { `\Ku]6J]5
sort(data, IMPROVED_QUICK); VObrlOkp
} 2GmpCy`L"
private static String[] name={ #_ C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )u ?' ;
}; 7Du1RuxP
:VmHfOO
private static Sort[] impl=new Sort[]{ OK|qv[
new InsertSort(), l7[7_iB&E
new BubbleSort(), U!w1AY|
new SelectionSort(), 1YxgR}7
new ShellSort(), [ee%c Xo
new QuickSort(), ra '
new ImprovedQuickSort(), O{z}8&oR:
new MergeSort(), Br>Fpe$q4
new ImprovedMergeSort(), 'Yy&G\S
new HeapSort() `'_m\uo
}; BfTcI)
ewsKH\#
public static String toString(int algorithm){ !hxIlVd{
return name[algorithm-1]; O OFVnu
} Z^KA
6X g]/FD
public static void sort(int[] data, int algorithm) { 3#kitmV
impl[algorithm-1].sort(data); 72TI
} }}{!u0N},V
7XrfuG*L$
public static interface Sort { Wk;5/
public void sort(int[] data); =8G&3 R
} or ;f&![w
qUF'{K
public static void swap(int[] data, int i, int j) { q!'rz
int temp = data; a5'#j35
data = data[j]; +~Cy$MCX
data[j] = temp; ^W83ByP
} Mc sTe|X
} &(rWwOo6