[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; 7[5g_D t
} *0]E4]ZO
int i1=l; x&9}] E^<
int i2=mid+1; hR,VE'A
for(int cur=l;cur<=r;cur++){ }Kc[pp|9<
if(i1==mid+1) a@`15O:
data[cur]=temp[i2++]; f`'?2
else if(i2>r) !xmvCH=2
data[cur]=temp[i1++]; WccTR aq
else if(temp[i1] data[cur]=temp[i1++]; 3a PCi>i!_
else cPA-EH
data[cur]=temp[i2++]; Pk/{~!+ $
} *A C){M
} dr0<K[S_
<>/0;J1<
} PD$XLZ
z=1 J{]
改进后的归并排序: 'qcLK>E
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package org.rut.util.algorithm.support; h|OqM:J;
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import org.rut.util.algorithm.SortUtil; K3*8JF7_F
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/** q[p+OpA
* @author treeroot e! V`cg0
* @since 2006-2-2 [uCW8:e
* @version 1.0 O="#yE)
*/ E!<w t
public class ImprovedMergeSort implements SortUtil.Sort { QA?e2kd
;;rEv5 /
private static final int THRESHOLD = 10; 5&a4c"fU
M{I8b<hY
/* ipU,.@~#
* (non-Javadoc) Eukj2a
* )RA$E`!b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]la8MaZ<
*/ JJ@O5
public void sort(int[] data) { OZ 4uk.)
int[] temp=new int[data.length]; c{4C4'GD
mergeSort(data,temp,0,data.length-1); D?;8bI%"
} 2)}ic2]pn
lM ]n
private void mergeSort(int[] data, int[] temp, int l, int r) { &}}c>]m
int i, j, k; gN#&Ag<?
int mid = (l + r) / 2; w$I<WS{J:Z
if (l == r) l`c&nf6
return; ,b;eU[!]
if ((mid - l) >= THRESHOLD) BeP]M1\?>
mergeSort(data, temp, l, mid); q#9JJWSs
else >7%Gd-;l
insertSort(data, l, mid - l + 1); CVfQ
if ((r - mid) > THRESHOLD) $1<V'b[E
mergeSort(data, temp, mid + 1, r); +Hx$ABH
else [1{#a {4
insertSort(data, mid + 1, r - mid); MX!t/&X(n
1_JtD|Jy
for (i = l; i <= mid; i++) { df@IC@`pB
temp = data; fNb2>1
} heQ<%NIA"
for (j = 1; j <= r - mid; j++) { {pJ{UJKv?
temp[r - j + 1] = data[j + mid]; XBQ]A89G
} ,iKEIxA!
int a = temp[l]; dXr=&@1
int b = temp[r]; r;:5P%:
for (i = l, j = r, k = l; k <= r; k++) { !DsKa6Zj
if (a < b) { =xwA'D9]
data[k] = temp[i++]; ^M?O
a = temp; / J 3
} else { U~!yGjF
data[k] = temp[j--]; %|mRib|<C
b = temp[j]; hE.NW
} i'Vrx(y3
} \uxDMKy
} u&MlWKCi
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/** (!kd9uV
* @param data bvdAOvxChW
* @param l pqmb&"l
* @param i .b'o}DLa
*/ ygt7;};!
private void insertSort(int[] data, int start, int len) { tXj28sh$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); awP ']iE
} 4o7(cP
} N7%iz+
} EB8=*B8
} f#~X4@DH`
^Mw>'*5^
堆排序： }.md$N_F
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package org.rut.util.algorithm.support; Ay?;0w0
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import org.rut.util.algorithm.SortUtil; r9!jIkILz
'N1_:$z@(
/** }yM /z
* @author treeroot :N!Fe7H,
* @since 2006-2-2 =.vc={_?
* @version 1.0 Z^t"!oY
*/ H/!_D f
public class HeapSort implements SortUtil.Sort{ $`7cs}#
ZJUTtiD
/* (non-Javadoc) jys1Ki
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s$g"6;_\
*/ h<KE)^).
public void sort(int[] data) { U)IW6)q
MaxHeap h=new MaxHeap(); qRXQL"Pe_l
h.init(data); l :sZ
for(int i=0;i h.remove(); Z}#,E;
System.arraycopy(h.queue,1,data,0,data.length); Oc\Bu6F
} .&Uu w
;r(hZ%pD
private static class MaxHeap{ {Rc!S? 8
FPM@%U
void init(int[] data){ 6Y!hz7D
this.queue=new int[data.length+1]; 1J8okBhZ
for(int i=0;i queue[++size]=data; 8?ig/HSt2
fixUp(size); C@!C='b,
} Z";~]]$!Y
} K9JW&5Q
x!6&)T?!n
private int size=0; K$>C*?R
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private int[] queue; C>%2'S^.b
#$!(8>YJ
public int get() { kpc3l[.A
return queue[1]; HJFt{tq2
} 8Ar5^.k
rn1^6qy)
public void remove() { H>8B$fi)$
SortUtil.swap(queue,1,size--); ?m&?BsW$)
fixDown(1); /S}0u}jID?
} L2"fO
file://fixdown 1.7tXjRd+
private void fixDown(int k) { T KpX]H`
int j; ^,@!L-<~(b
while ((j = k << 1) <= size) { SM>V o+
if (j < size %26amp;%26amp; queue[j] j++; _N`:NOM
if (queue[k]>queue[j]) file://不用交换 :Ny.OA
break; *5( h,s3&
SortUtil.swap(queue,j,k); /mMRV:pd
k = j; N[$bP)h7
} 5LVhq[}mP
} d*7nz=0&$
private void fixUp(int k) { L<HJ!
while (k > 1) { S\7-u\)
int j = k >> 1; 8KqrB!
if (queue[j]>queue[k]) "PA:
break; b21c} rI3
SortUtil.swap(queue,j,k); aAHx^X^
k = j; OnO56,+S^
} <~9z.v7
} oj.f uJD
D ==H{c1F
} IooAXwOF
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} r^3QDoy
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SortUtil： R"Q=U}?$
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package org.rut.util.algorithm; .h)o\6Wq
,xA`Fu9^
import org.rut.util.algorithm.support.BubbleSort; 0cV=>|b>;
import org.rut.util.algorithm.support.HeapSort; gg;&a(
import org.rut.util.algorithm.support.ImprovedMergeSort; Rs@2Pe$3
import org.rut.util.algorithm.support.ImprovedQuickSort; J7q]|9Hus|
import org.rut.util.algorithm.support.InsertSort; `% sKF
import org.rut.util.algorithm.support.MergeSort; (n'Mf
import org.rut.util.algorithm.support.QuickSort; MCN}pi
import org.rut.util.algorithm.support.SelectionSort; 9|yn{4E
import org.rut.util.algorithm.support.ShellSort; sjBP#_lW
b&k !DeE
/** &A=>x
* @author treeroot i7h!,vaK
* @since 2006-2-2 KiXXlaOs
* @version 1.0 _YVp$aKDR
*/ #KA,=J
public class SortUtil { O+vuv,gNi
public final static int INSERT = 1; ]Lg$p
public final static int BUBBLE = 2; N?`-$C ]
public final static int SELECTION = 3; CRy;>UI
public final static int SHELL = 4; r+8%oWj
public final static int QUICK = 5; ]Bo !v*12
public final static int IMPROVED_QUICK = 6; wOH$S=Ba5,
public final static int MERGE = 7; /A3tY"Vn
public final static int IMPROVED_MERGE = 8; X}?`G?'
public final static int HEAP = 9; #h'F6
j6wdqa9!~
public static void sort(int[] data) { 5&5 x[S8
sort(data, IMPROVED_QUICK); l4c9.'6
} ur\v[k=
private static String[] name={ ?+Sjt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D[) Z$+D4f
}; c`]_Q1'30w
{Lj]++`fB]
private static Sort[] impl=new Sort[]{ k@1\ULo
new InsertSort(), NFT&\6!o
new BubbleSort(), M1><K:
new SelectionSort(), 9!hiCqA&
new ShellSort(), _~m@ SI
new QuickSort(), #K1VPezN
new ImprovedQuickSort(), v]CH L# |
new MergeSort(), s{v!jZ
new ImprovedMergeSort(), AH$D./a
new HeapSort() [d="94Ab
}; FX QUj&9
t!MGSB~
public static String toString(int algorithm){ %u"3&kOV
return name[algorithm-1]; 3D3/\E#'o
} w i,}sEoM
yyZV/ x~
public static void sort(int[] data, int algorithm) { $ZSjq
impl[algorithm-1].sort(data); -eH5s3:A
} \W5fcxf
OZ2gIK
public static interface Sort { n_[;2XQQ
public void sort(int[] data); d+P<nI/|
} s)HLFdis@
4(5NHsvp
public static void swap(int[] data, int i, int j) { %5|awWo_?
int temp = data; qx3@]9
data = data[j]; @ i$jyc
data[j] = temp; 2y/|/IW=
} 29R_?HBH
} V gLnpPOQ