[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; * u>\57W
} 7$=InK
int i1=l; 0S~rgq|O
int i2=mid+1; ?`ZUR& 20
for(int cur=l;cur<=r;cur++){ vE?G7%,
if(i1==mid+1) HV|,}Wks6s
data[cur]=temp[i2++]; u6agoK|^9
else if(i2>r) h]gp^?=
data[cur]=temp[i1++]; n>YKa)|W`
else if(temp[i1] data[cur]=temp[i1++]; NLqzi%s
else da(<K}
data[cur]=temp[i2++]; PZ9I`P!C
} tsjrRMR
} cwg"c4V
K%oG,-wdg
} D,feF9
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改进后的归并排序: bn5 Su=]
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package org.rut.util.algorithm.support; ~>|ziHx
8Z~EwY*
import org.rut.util.algorithm.SortUtil; iBaA9
$&td=OK
/** 3w'tH4C[Y
* @author treeroot S1_RjMbYM
* @since 2006-2-2 #6=
* @version 1.0 {<KVx9
*/ ?caSb=f
public class ImprovedMergeSort implements SortUtil.Sort { [W&T(%(W-
S9.o/mr
private static final int THRESHOLD = 10; 77Dn97l)&
hgq;`_;1,
/* ZECfR>`x
* (non-Javadoc) e^voW"?%
* /N{*"s2)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (LCfUI6;
*/ })%{AfDRF
public void sort(int[] data) { h_'*XWd@
int[] temp=new int[data.length]; }K(TjZR
mergeSort(data,temp,0,data.length-1); 9*M,R,y
} o]V^};B
2,b$7xaf
private void mergeSort(int[] data, int[] temp, int l, int r) { !nnC3y{G
int i, j, k; [/r(__.
int mid = (l + r) / 2; oB7_O-3z
if (l == r) _[BP0\dPW
return; hZb_P\1X
if ((mid - l) >= THRESHOLD) E1 2uZ$X
mergeSort(data, temp, l, mid); :2`e(+Uz
else ,P0) 6>
insertSort(data, l, mid - l + 1); 8s@3hXD&
if ((r - mid) > THRESHOLD) >t+P(*u
mergeSort(data, temp, mid + 1, r); !N^@4*
else {.Jlbi9!
insertSort(data, mid + 1, r - mid); xmoxZW:
:3 mh@[V
for (i = l; i <= mid; i++) { +}AI@+
temp = data; "AqB$^S9t
} 8oGRLYU N
for (j = 1; j <= r - mid; j++) { 2 %]X+`+O
temp[r - j + 1] = data[j + mid]; $??I/6
} HPVEnVn
int a = temp[l]; 2=}FBA,2
int b = temp[r]; x8|J-8A(
for (i = l, j = r, k = l; k <= r; k++) { Hl=xW/%6y
if (a < b) { 2\$oV
data[k] = temp[i++]; yHaGkm
a = temp; c71y'hnT
} else { dE3) |%
data[k] = temp[j--]; |-H&o]
b = temp[j]; Id9TG/H7
} er\|i. Y
} L~3Pm%{@A
} 0jfuBj5!
4+tEFxvX&
/** ['D]>Ot68
* @param data U<XG{<2
* @param l "dlVk~
* @param i x{n=;JD
*/ ;Rf'P}"]
private void insertSort(int[] data, int start, int len) { zQ PQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E{(;@PzE
} xIn:ZKJ'
} i.#:zU%o
} !,PWb3S
} j>kqz>3
`]aeI'[}R
堆排序： rm_Nn8p,
@4#vm@Yf_
package org.rut.util.algorithm.support; 7zc^!LrW<
&^nGtW%a 9
import org.rut.util.algorithm.SortUtil; iy"*5<;*DD
%iB,IEw
/** `D9$v(Ztr
* @author treeroot |W^IlqTH
* @since 2006-2-2 :T~[
* @version 1.0 EQ_aa@M7
*/ h+,@G,|D
public class HeapSort implements SortUtil.Sort{ gqR(.Pu
\)e'`29;
/* (non-Javadoc) 6LhTBV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v:#tWEbo-
*/ [F7hu7zY8
public void sort(int[] data) { KPki}'GO
MaxHeap h=new MaxHeap(); -\MG}5?!
h.init(data); FI.\%x
for(int i=0;i h.remove(); d(K+);!
System.arraycopy(h.queue,1,data,0,data.length); I^]nqK
} Vvo7C!$z
6u%&<")4HP
private static class MaxHeap{ 4M T 7`sr
|j|rS5
void init(int[] data){ qP ,EBE
this.queue=new int[data.length+1]; nt<]d\o0
for(int i=0;i queue[++size]=data; PY'2h4IL
fixUp(size); y7<|_:00
} CJyevMf'
} +[ZY:ZQ
#9s,# }
private int size=0; (k P9hcV
xD7]C|8o
private int[] queue; /{2,zW
kxCSs7J/
public int get() { a9Vi];
return queue[1]; Y0> @vTUX
} n"8Yv~v*2j
EX"yxZ~
public void remove() { ^rz_f{c]-
SortUtil.swap(queue,1,size--); L},_.$I?
fixDown(1); :'ptuY
} CN?gq^
file://fixdown p4QU9DF
private void fixDown(int k) { s#MPX3itK
int j; YYS0`
while ((j = k << 1) <= size) { O0:q;<>z
if (j < size %26amp;%26amp; queue[j] j++; |BYRe1l6l
if (queue[k]>queue[j]) file://不用交换 iRBfx
break; GX%g9f!O
SortUtil.swap(queue,j,k); )B*t :tN
k = j; kf9X$d6
} m[2gdJK
} ig"L\ C"T
private void fixUp(int k) { ^?|"L>y
while (k > 1) { l"]V6!-U
int j = k >> 1; 1Ws9WU
if (queue[j]>queue[k]) H*6W q
break; R-14=|7a-
SortUtil.swap(queue,j,k); #;S*V"
k = j; v^PO|Z
} NlXimq
} 1mJHued=6
sRfcF`7
} c",*h
8EY:tzw
} |a@L}m
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SortUtil： Zd&S@Z
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package org.rut.util.algorithm; @nf`Gw ;
|uDdHX8T
import org.rut.util.algorithm.support.BubbleSort; `u\n0=go
import org.rut.util.algorithm.support.HeapSort; M%#e1"n
import org.rut.util.algorithm.support.ImprovedMergeSort; P2Y^d#jO
import org.rut.util.algorithm.support.ImprovedQuickSort; d5d@k
import org.rut.util.algorithm.support.InsertSort; .C(tMF]D,
import org.rut.util.algorithm.support.MergeSort; JI5Dy>u:
import org.rut.util.algorithm.support.QuickSort; ^@]3R QB
import org.rut.util.algorithm.support.SelectionSort; B<-Wea
import org.rut.util.algorithm.support.ShellSort; (.,G=\!
>3bCTE
/** ,?3G;-
* @author treeroot z{>Rc"%\
* @since 2006-2-2 GthYzd:'hJ
* @version 1.0 8>V5dEbx'
*/ Ts9uL5i
public class SortUtil { I:.s_8mH}
public final static int INSERT = 1; %znc##j)q
public final static int BUBBLE = 2; v,t:+ !8
public final static int SELECTION = 3; ]R*A
public final static int SHELL = 4; ]f3>-)$*
public final static int QUICK = 5; PW4q~rc=:
public final static int IMPROVED_QUICK = 6; ntY]SK%Z
public final static int MERGE = 7; SX*RP;vHy
public final static int IMPROVED_MERGE = 8; gZ5 |UR<
public final static int HEAP = 9; W9)&!&<o
9FX-1,Jx
public static void sort(int[] data) { H.0K?N&\?>
sort(data, IMPROVED_QUICK); 4\i[m:e=@
} f 1d?.)
private static String[] name={ /O9EQPm(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KmF]\:sMD
}; > P)w?:k
r=4eP(w=
private static Sort[] impl=new Sort[]{ @WB@]-+J T
new InsertSort(), nP$9CA
new BubbleSort(), ElXFeJ%[G
new SelectionSort(), c%&>p||
new ShellSort(), IK]d3owA
new QuickSort(), qWw=8Bq
new ImprovedQuickSort(), o(HbGHIP
new MergeSort(), <QvOs@i*
new ImprovedMergeSort(), Mfs?x a
new HeapSort() N;gfbh]
}; ;\]@K6m/Ap
K%d&EYoW]
public static String toString(int algorithm){ 0aAoV0fMDz
return name[algorithm-1]; 2?x4vI np;
} BuwY3F\-O
Xeajxcop#
public static void sort(int[] data, int algorithm) { 4R*,VR.K
impl[algorithm-1].sort(data); F\! `/4
} {8aTV}Ha2
B1STGL`nK
public static interface Sort { ix$bRdl
public void sort(int[] data); _j3fAr(V
} M`>E|"<
1"g<0 W
public static void swap(int[] data, int i, int j) { g5yJfRLxp
int temp = data; ]?*wbxU0
data = data[j]; r3Ykz%6
data[j] = temp; /o[w4d8
} Q;u pau
} HV.t6@\};