[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; TBba3%
} a2i:fz=[
int i1=l; PYY<
int i2=mid+1; -U?%A:,a|
for(int cur=l;cur<=r;cur++){ d{@'&?tj
if(i1==mid+1) x!pd50-
data[cur]=temp[i2++]; )1R[X!KQ7
else if(i2>r) N2k{@DY
data[cur]=temp[i1++]; A )CsF
else if(temp[i1] data[cur]=temp[i1++]; ,1lW`Krx
else hNgT/y8
data[cur]=temp[i2++]; !W0JT#0
} 7.g,&s%q
} X}C8!LA
.*>C[^
} Z?3B1o9
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改进后的归并排序: R\#5;W^
H1KXAy`&
package org.rut.util.algorithm.support; R[fQ$` M
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import org.rut.util.algorithm.SortUtil; @Gw]cm
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/** EM+! ph
* @author treeroot QQS"K g
* @since 2006-2-2 yv>uzb`N
* @version 1.0 i.?rom
*/ wN/v-^2
public class ImprovedMergeSort implements SortUtil.Sort { DAORfFG74
u(?U[pe[
private static final int THRESHOLD = 10; bJR\d0Z
k]RQ 7e
/* 7v0VZ(UR
* (non-Javadoc) eoQt87VCU
* ^nOh8L;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T?.l_"%%d
*/ D+jvF
public void sort(int[] data) { Ukf:m&G
int[] temp=new int[data.length]; 0JR)-*
mergeSort(data,temp,0,data.length-1); )"M;7W?R0
} ?A r}QN
b'R]DS{8
private void mergeSort(int[] data, int[] temp, int l, int r) { .W2w/RayC
int i, j, k; \:q@I]2
int mid = (l + r) / 2; QyZ'%T5J
if (l == r) XH/!A`ZK
return; ]*U; }
if ((mid - l) >= THRESHOLD) Q`Pe4CrWvu
mergeSort(data, temp, l, mid); HJpx,NU'
else (dO0`wfM
insertSort(data, l, mid - l + 1); V|HO*HiB3
if ((r - mid) > THRESHOLD) (I>SqM Y
mergeSort(data, temp, mid + 1, r); cd=H4:<T5
else p?P.BU\CR
insertSort(data, mid + 1, r - mid); m6xbO
M\IdQY-c
for (i = l; i <= mid; i++) { oblw!)
temp = data; n:s _2h(u
} mc@Z+t'
for (j = 1; j <= r - mid; j++) { SNSoV3|k-
temp[r - j + 1] = data[j + mid]; 00y(E@~
} VAyAXN~
int a = temp[l]; ~YviXSW
int b = temp[r]; 4 EA$<n(A-
for (i = l, j = r, k = l; k <= r; k++) { 7*Zm{r@u
if (a < b) { v{*2F
data[k] = temp[i++]; |Dq?<Ha
a = temp; ) R\";{`M
} else { r8czDc),b
data[k] = temp[j--]; ybv< 1
b = temp[j]; h2:TbQ
} Bqk+ne
} <+b~E,
} !A|}_K1Cr
JPj/+f
/** <dBz]W
* @param data vQ$"|8,
* @param l 1 un!
* @param i =i7CF3
*/ 16.?45
private void insertSort(int[] data, int start, int len) { Nr]guC?rE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [=Nv=d<[p
} zqI|VH
} 7/BjWU5*
} iF.f*3-NJB
} o4z|XhLr
T`<Tj?:^&
堆排序： "15frr?
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package org.rut.util.algorithm.support; "EWq{l_I5$
;9J6)zg !n
import org.rut.util.algorithm.SortUtil; 61HJ%
BuC\Bd^0
/** \]\GDpu[
* @author treeroot X;vUz
* @since 2006-2-2 8hyXHe
* @version 1.0 XZ(<Mo\v
*/ jr-9KxE
public class HeapSort implements SortUtil.Sort{ 37M,Os1(
']OT7)_
/* (non-Javadoc) Hf30ve}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *Id[6Z
*/ RgM=g8}M
public void sort(int[] data) { ~rAcT6#
MaxHeap h=new MaxHeap(); V^}$f3\B
h.init(data); 6bf!v
for(int i=0;i h.remove(); ~ySsv
System.arraycopy(h.queue,1,data,0,data.length); V;~\+@
} Lo}/k}3Sx
_Ii=3Qsf
private static class MaxHeap{ lC d\nE8G
a^O>i#i
void init(int[] data){ X>]<rEh
this.queue=new int[data.length+1]; yRQNmR;Uy
for(int i=0;i queue[++size]=data; #}tdA( -
fixUp(size); dWhqu68_
} #AO}JP
} "Z dI~
^R7X!tOq4
private int size=0; YXdo&'Q<qX
?D_}',Wx
private int[] queue; :."+&gb
gh^w !tH3
public int get() { 3 "Qg"\
return queue[1]; ?TmVLny
} %?S[{ 4A&
tWTC'Gx-J
public void remove() { \3F)M`g
SortUtil.swap(queue,1,size--); bIV9cpW
fixDown(1); Mdu\ci)lr
} l$W)Vk<B(T
file://fixdown ?1eu9;q\*
private void fixDown(int k) { r,L`@A=v
int j; a [f}-t9
while ((j = k << 1) <= size) { 7+6I~&x!Lz
if (j < size %26amp;%26amp; queue[j] j++; 7WmY:g#s
if (queue[k]>queue[j]) file://不用交换 s]D1s%Mx
break; k6\&[BQs
SortUtil.swap(queue,j,k); =<ht@-1
k = j; !rG-[7K
} 6eNBldP!
} bp}]'NA
private void fixUp(int k) { 3u;0,:X&
while (k > 1) { z38Pi
int j = k >> 1; rvb@4-i>iI
if (queue[j]>queue[k]) |H5$VSw
break; oj,;9{-
SortUtil.swap(queue,j,k); z 5~X3k7
k = j; Pb59RE:7V
} #wh[F"zX
} h]VC<BD6S
xZQyH
} a%/x
,wyEo>>4)
} wDBU+Z
m?;/H
SortUtil： Q7mikg=1-
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package org.rut.util.algorithm; -KqMSf&9
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import org.rut.util.algorithm.support.BubbleSort; ^j1G08W
import org.rut.util.algorithm.support.HeapSort; Gxt6]+r
import org.rut.util.algorithm.support.ImprovedMergeSort; !4YmaijeN
import org.rut.util.algorithm.support.ImprovedQuickSort; X7MA>j3m
import org.rut.util.algorithm.support.InsertSort; T@n};,SQ
import org.rut.util.algorithm.support.MergeSort; ;YBk.} %
import org.rut.util.algorithm.support.QuickSort; w.=rea~
import org.rut.util.algorithm.support.SelectionSort; 4NIb_E0
import org.rut.util.algorithm.support.ShellSort; aq(i^d
Kzwe36O;?
/** xBqZ: BQ
* @author treeroot U\[b qw
* @since 2006-2-2 G^/8^Zi
* @version 1.0 )31xl6@
*/ EKmn@S-&P
public class SortUtil { ;iUO1t)^
public final static int INSERT = 1; Go[anf
public final static int BUBBLE = 2; ~D/1U)kt
public final static int SELECTION = 3; v<| iN#
public final static int SHELL = 4; 1Z_ H%(
public final static int QUICK = 5; fvA167\
public final static int IMPROVED_QUICK = 6; W!* P
public final static int MERGE = 7; ;9vY5CxzC
public final static int IMPROVED_MERGE = 8; @CC 6`D
public final static int HEAP = 9; h+9~^<oFl
vJb/.)gh]
public static void sort(int[] data) { j`MK\*qmz
sort(data, IMPROVED_QUICK); [Z!oVSCZD%
} +9#qNkP
private static String[] name={ "`* >co6r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %e+*&Z',
}; t\n'Kuk`
2>Qy*
private static Sort[] impl=new Sort[]{ [X@JH6U r
new InsertSort(), DJ!pZUO{
new BubbleSort(), Pup%lO`.0
new SelectionSort(), =n8M'
new ShellSort(), 6ywOL'OBM
new QuickSort(), mdcsL~R
new ImprovedQuickSort(), J{nA ?[
new MergeSort(), ]Z[0xs
new ImprovedMergeSort(), !H6X%hlk
new HeapSort() bj?=\u
}; <J.q[fd1*
(Hs,Tj
public static String toString(int algorithm){ 'GLpSWL+*
return name[algorithm-1]; QEF$Jx
} (!9+QXb'
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public static void sort(int[] data, int algorithm) { iaRCV6cl
impl[algorithm-1].sort(data); "Sw raq
} =L{-Hu/j
?&VKZSo
public static interface Sort { 9N6 \Ou~
public void sort(int[] data); )C rsm&
} [?2,(X0yh1
KfQR(e9n
public static void swap(int[] data, int i, int j) { $JiypX^DOP
int temp = data; Yt=2HJY
data = data[j]; "2PT]!
data[j] = temp; hsYv=Tw3C
} b]N&4t
} s$^2Qp