[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; VIb;96$Or
} JvKO $^
int i1=l; @8QFP3\1
int i2=mid+1; cLn;,u4
for(int cur=l;cur<=r;cur++){ yVT&rQ"{
if(i1==mid+1) ;9}w|!/
data[cur]=temp[i2++]; uPI v/&HA
else if(i2>r) [SK2x4
data[cur]=temp[i1++]; qi(&8in
else if(temp[i1] data[cur]=temp[i1++]; |Uc<;> l
else ,m2A p\l
data[cur]=temp[i2++]; joxS+P5#
} Vp|2wlFE-
} 2r %>]y
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} S4;wa6
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改进后的归并排序: :uOZjEZi
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package org.rut.util.algorithm.support; s4x'f$r
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import org.rut.util.algorithm.SortUtil; AmP#'U5
np<f,
/** -0{T
* @author treeroot Rbx97(wK
* @since 2006-2-2 2b; rr
* @version 1.0 kEp.0wL'
*/ xeJ9H~^
public class ImprovedMergeSort implements SortUtil.Sort { pGO|~:E/L
=6.8bZT\
private static final int THRESHOLD = 10; CkmlqqUHC
suA+8}o]
/* OAmES;Ck$(
* (non-Javadoc) j9{O0[v
* pYYqGv^oa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xnJjCEZ
*/ k)?,xY\AV
public void sort(int[] data) { qzuQq94k
int[] temp=new int[data.length]; >+yqjXRzm
mergeSort(data,temp,0,data.length-1); ZC3tbhV
} K<$wz/\
LEYWH%y
private void mergeSort(int[] data, int[] temp, int l, int r) { ;k9 ?
int i, j, k; E"Ya-8d=
int mid = (l + r) / 2; 6a "VCE]
if (l == r) )2iM<-uB
return; ^+(A&PyP?
if ((mid - l) >= THRESHOLD) \[Sm2/9v
mergeSort(data, temp, l, mid); Q%M'[L?[
else vGx?m@
insertSort(data, l, mid - l + 1); F{#N6,T
if ((r - mid) > THRESHOLD) F Q8RK~?`
mergeSort(data, temp, mid + 1, r); O"_erH\nk
else N&6_8=3z
insertSort(data, mid + 1, r - mid); .8u$z`j
YD/B')/ s
for (i = l; i <= mid; i++) { u=p ;A1oy
temp = data; Ss"|1]acP
} .V5q$5j
for (j = 1; j <= r - mid; j++) { 2ApDpH`fiJ
temp[r - j + 1] = data[j + mid]; U%mkhWn
} [;>zqNy
int a = temp[l]; y3 ({(URU
int b = temp[r]; {]t\`fjrg
for (i = l, j = r, k = l; k <= r; k++) { Hs:4I
if (a < b) { ?z\q Mu
data[k] = temp[i++]; '1>g=Ic0
a = temp; \_*?R,$3Y,
} else { %JP&ox|^&
data[k] = temp[j--]; OqfhCNAY
b = temp[j]; nx!qCgo
} c,v^A+sZu
} "E@NZ*"u
} SR&(HH$
.4S^nP
/** J8sJ~FnUj
* @param data b>hBct}
* @param l kjLsk-
* @param i d-6sC@PB
*/ LVR;&Z>j
private void insertSort(int[] data, int start, int len) { >,w\lf9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mhHA!:Y
} `l[6rf_.
} "?2
} w6WGFQ_%
} *6 z'+'
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堆排序： I2t-D1X
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package org.rut.util.algorithm.support; @1pW!AdN
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import org.rut.util.algorithm.SortUtil; ^D]7pe
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/** dvg;
* @author treeroot wf~5lpI[
* @since 2006-2-2 OBKC$e6I
* @version 1.0 Ak\D6eHcB
*/ eeI9[lTw
public class HeapSort implements SortUtil.Sort{ yBYuDfeZ
/?.r!Cp
/* (non-Javadoc) h@PMCmf_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~_dBND?
*/ h8iaJqqvJ
public void sort(int[] data) { ?{@!!te@3v
MaxHeap h=new MaxHeap(); ~# hE&nq
h.init(data); b.mjQ
for(int i=0;i h.remove(); 2HvTM8
System.arraycopy(h.queue,1,data,0,data.length); >0g`U
} ^td!g1"<
{Gk}3u/
private static class MaxHeap{ 0]:*v?
Azq#}Oe)u
void init(int[] data){ ~ X]"P4 u
this.queue=new int[data.length+1]; eu}:Wg2
for(int i=0;i queue[++size]=data; =B/s HN
fixUp(size); np'M4^E;
} ySr091Q
} 7N}\1Di5
&|'Kut?8
private int size=0; AXNszS%4
;4S [ba1/
private int[] queue; zal3j^
(zM+7tJH
public int get() { XqE55Jclp
return queue[1]; C~ }Wo5
} k<j)?_=`
@ @3)D%h
public void remove() { 1v[#::Bs
SortUtil.swap(queue,1,size--); {R1Cxt}
fixDown(1); Ivt)Eg
} %`s9yRk9>E
file://fixdown HkfSx rTgQ
private void fixDown(int k) { -?%{A%'
int j; @0/@p"j
while ((j = k << 1) <= size) { QX.F1T2e?
if (j < size %26amp;%26amp; queue[j] j++; qN`]*baS
if (queue[k]>queue[j]) file://不用交换 yNWbI0a
break; ,h^;~|GT
SortUtil.swap(queue,j,k); a`h$lUb-
k = j; @|\s$L
} *Y^Y
} HZr/0I?
private void fixUp(int k) { PE;0 jgsiI
while (k > 1) { v0jz)z<#
int j = k >> 1; G.q^Zd#.T
if (queue[j]>queue[k]) U*qK*"k
break; RfKxwo|M<
SortUtil.swap(queue,j,k); On96N|
k = j; ;ijfI
} ! 4^L $
} Med"dHo7
NM.f0{:cj
} 82@;.%
->"h5h
} .+JPtL
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SortUtil： k~9Ywf
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package org.rut.util.algorithm; OTFu4"]M
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import org.rut.util.algorithm.support.BubbleSort; hDkqEkq1R
import org.rut.util.algorithm.support.HeapSort; %ucmJ-<y#
import org.rut.util.algorithm.support.ImprovedMergeSort; H R!>g
import org.rut.util.algorithm.support.ImprovedQuickSort; ,w58n%)H
import org.rut.util.algorithm.support.InsertSort; &LxzAL,3!
import org.rut.util.algorithm.support.MergeSort; >0;"qT
import org.rut.util.algorithm.support.QuickSort; ^%OH}Z`ly
import org.rut.util.algorithm.support.SelectionSort; JpHsQ8<
import org.rut.util.algorithm.support.ShellSort; U+}9X^
_~#C $-T
/** buM>^A"
* @author treeroot y@8399;l
* @since 2006-2-2 1oW]O@R
* @version 1.0 fvBC9^3
*/ fN%5D z-e
public class SortUtil { ) ImIPSL
public final static int INSERT = 1; hpi_0lMkI
public final static int BUBBLE = 2; LAVt/TcZS|
public final static int SELECTION = 3; K'rs9v"K|
public final static int SHELL = 4; Zz*mf+
public final static int QUICK = 5; #1!BD!u
public final static int IMPROVED_QUICK = 6; E,?aBRxy
public final static int MERGE = 7; _.8]7f`*Gc
public final static int IMPROVED_MERGE = 8; m=l3O:~J
public final static int HEAP = 9; X'Il:SK
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public static void sort(int[] data) { >`V|`Zi ?
sort(data, IMPROVED_QUICK); x 3co?
} F1[[fH
private static String[] name={ vc1GmB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6o23#JgN
}; Q+js2?7^
Jz8#88cY
private static Sort[] impl=new Sort[]{ .;v'oR1x5
new InsertSort(), z)y(31K<1
new BubbleSort(), 5Fm?,^
new SelectionSort(), D~?*Xv]s~
new ShellSort(), ~map5@Kd
new QuickSort(), EBE>&{%$^
new ImprovedQuickSort(), mb6?$1j
new MergeSort(), 7 ,~Krzv
new ImprovedMergeSort(), -ddatc|
new HeapSort() LO*a>9LI
}; {ZI6!zh'
`ZV'7|
public static String toString(int algorithm){ 7n/I'r
return name[algorithm-1]; mpJ_VS`
} 5*'N Q010
w}<I\*\`!
public static void sort(int[] data, int algorithm) { _BaS\U%1(
impl[algorithm-1].sort(data); EGO@`<"h
} uXa}<=O
nE$ V<Co}
public static interface Sort { w|*G`~l09
public void sort(int[] data); BnY|t2r
} *"L:"i`*$
u+FftgA
public static void swap(int[] data, int i, int j) { 5W'|qmJ
int temp = data; 4KB?g7_*
data = data[j]; A^7Zy79
data[j] = temp; R.$Y1=U6
} D\~$6#B>>
} l),13"?C(