[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; Vw~\H Gs/~
} {' 5qv@3
int i1=l; m;,xmEp
int i2=mid+1; 7wVH8^|
for(int cur=l;cur<=r;cur++){ ^3~e/PKM
if(i1==mid+1) ^?GmrHC)
data[cur]=temp[i2++]; 7o]HQ[xO
else if(i2>r) )jDJMi_[
data[cur]=temp[i1++]; 6QZp@
else if(temp[i1] data[cur]=temp[i1++]; j-b*C2l
else &c%Y<1e`%
data[cur]=temp[i2++]; 0XU}B\'<
} r>t1 _b+nu
} ,wj"! o#
jndGiMA
} B\CN<<N>dD
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改进后的归并排序: HdX2YPYn;
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package org.rut.util.algorithm.support; zm#nV Y`
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import org.rut.util.algorithm.SortUtil; L%\b'fs
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/** A9:NKY{z
* @author treeroot uGVy6,
* @since 2006-2-2 [f{VIE*?%
* @version 1.0 4. qtp`
*/ i$^ZTb^
public class ImprovedMergeSort implements SortUtil.Sort { fiDl8=~@
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private static final int THRESHOLD = 10; /-M@[p&
,kM)7!]N
/* /X*oS&-M
* (non-Javadoc) #x@eDnb_
* =Lp7{09u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 27Emm c
*/ ccJM>9
public void sort(int[] data) { lB;FUck9
int[] temp=new int[data.length]; &^.57]
mergeSort(data,temp,0,data.length-1); z\!K<d"Xv
} #"*e+.j[;
elPE%'
private void mergeSort(int[] data, int[] temp, int l, int r) { S::>N.y
int i, j, k; G}zZQy
int mid = (l + r) / 2; \_BkY%a
if (l == r) Ym8}ZW-
return; m`A% p
if ((mid - l) >= THRESHOLD) 5Av=3[kh"%
mergeSort(data, temp, l, mid); xL "!~dN
else 5Fw - d
insertSort(data, l, mid - l + 1); }IaA7f
if ((r - mid) > THRESHOLD) ]uh3R{a/
mergeSort(data, temp, mid + 1, r); LHYLC>J
else Xrqx\X
insertSort(data, mid + 1, r - mid); A[N{
0 p uY"[c
for (i = l; i <= mid; i++) { P 7D!6q
temp = data; F7}-!
} YwDt.6(+,
for (j = 1; j <= r - mid; j++) { ^QXbJJ
temp[r - j + 1] = data[j + mid]; Dm0a.J v
} n6Z|Q@F
int a = temp[l]; Y3U9:VB
int b = temp[r]; Me3dpF
for (i = l, j = r, k = l; k <= r; k++) { 2DDsWJ;
if (a < b) { \?fIt?
data[k] = temp[i++]; } p:%[
a = temp; 6" B%)0
} else { 5<YzalNf
data[k] = temp[j--]; V9%aBkf8w
b = temp[j]; ?&+9WJ<M
} :!TIK1
} FY3IUG
} 5"KlRuv%
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/** #1nJ(-D+
* @param data 6p;m\
* @param l }j{!-&
* @param i X[$++p .
*/ t#E}NR
private void insertSort(int[] data, int start, int len) { eVh-_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Sus;(3EX
} bZwnaM4"F
} qL /7^)(
} z?]G3$i(
} -0uV z)
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堆排序： #s5N[uK^m
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package org.rut.util.algorithm.support; oYM3Rgxf9Q
hVpCB,
import org.rut.util.algorithm.SortUtil; TD@v9
n~IVNB*
/** 1OaXo!
* @author treeroot W8WXY_yJt
* @since 2006-2-2 kAYb!h[`
* @version 1.0 B9dt=j3j2
*/ 1 jb/o5n;
public class HeapSort implements SortUtil.Sort{ 8(U{2B8>\%
;3'NMk
/* (non-Javadoc) MjL)IgT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }?@5W,
*/ e&<yX
public void sort(int[] data) { \%jVg\4'
MaxHeap h=new MaxHeap(); ,\)a_@@k
h.init(data); +>f<EPGn
for(int i=0;i h.remove(); Q9F)
System.arraycopy(h.queue,1,data,0,data.length); W&Y"K)`
} VyLH"cCv
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private static class MaxHeap{ D@ek9ARAq
I27,mS+]
void init(int[] data){ F=a+z/xKT
this.queue=new int[data.length+1]; &dB-r&4;+
for(int i=0;i queue[++size]=data; kma?v B
fixUp(size); coE&24,0
} .x83Ah`
} Pt,ebL~
r),PtI0X
private int size=0; sN=6gCau
jH;Du2w
private int[] queue; `6=-WEo
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public int get() { gxNL_(A
return queue[1]; <=K qcHb
} 6 ,ANNj
_u0$,Y?&|
public void remove() { _o3e]{
SortUtil.swap(queue,1,size--); &?,U_)x/
fixDown(1); A;XOT6jv?
} El_Qk[X|A
file://fixdown [IZM.r`Z
private void fixDown(int k) { x[_=#8~.1x
int j; 8,T4lb<<
while ((j = k << 1) <= size) { IIFMYl gF
if (j < size %26amp;%26amp; queue[j] j++; Y,S\2or$
if (queue[k]>queue[j]) file://不用交换 ZfAzc6J?\
break; 6]cryf&b
SortUtil.swap(queue,j,k); U%<rn(xWXD
k = j; XKOUQc4!R
} vT^Sk;E
} Qq& W3
private void fixUp(int k) { w0m^ &,;#
while (k > 1) { @exey
int j = k >> 1; oih5B<&f#
if (queue[j]>queue[k]) dIweg=x
break; \/`?
SortUtil.swap(queue,j,k); 2.uA|~qH
k = j; SUCUP<G
} 9Ru;`
} uLeRZSC
5v.DX`"
} sfT+i;p
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} yY{kG2b,
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SortUtil： ]w).8=I
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package org.rut.util.algorithm; %V G/
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import org.rut.util.algorithm.support.BubbleSort; `bI)<B
import org.rut.util.algorithm.support.HeapSort; `1` f*d v
import org.rut.util.algorithm.support.ImprovedMergeSort; U%B(5cC
import org.rut.util.algorithm.support.ImprovedQuickSort; Z [Xa%~5>5
import org.rut.util.algorithm.support.InsertSort; S:Q! "U
import org.rut.util.algorithm.support.MergeSort; ~^I>#Dd
import org.rut.util.algorithm.support.QuickSort; >>Ar$
import org.rut.util.algorithm.support.SelectionSort; '1SG(0
import org.rut.util.algorithm.support.ShellSort; jF"YTr6
>cMd\%^t
/** P\m7 -
* @author treeroot LHCsk{3
* @since 2006-2-2 w?vVVA
* @version 1.0 5MTgK=c
*/ OWjJxORB
public class SortUtil { . v)mZp
public final static int INSERT = 1; 0BPMmk
public final static int BUBBLE = 2; IakKi4(
public final static int SELECTION = 3; 8^^[XbH
public final static int SHELL = 4; /c#`5L[
public final static int QUICK = 5; V~MiO.B
public final static int IMPROVED_QUICK = 6; rZ1Hf11C
public final static int MERGE = 7; $P o}
public final static int IMPROVED_MERGE = 8; :PYtR
public final static int HEAP = 9; [U =Uo*
l.)}t)my}
public static void sort(int[] data) { SkNre$>t{
sort(data, IMPROVED_QUICK); j=+"Qz/hr_
} ^H'a4G3
private static String[] name={ EpPf_ \o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^4Am %yyT
}; `b5 @}',
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private static Sort[] impl=new Sort[]{ we7c`1E
new InsertSort(), .aOnGp
new BubbleSort(), Y(VJbm`
new SelectionSort(), x|64l`Vp(:
new ShellSort(), vEe NW
new QuickSort(), 9.O8/0w7LV
new ImprovedQuickSort(), k,Qskd-N]
new MergeSort(), :c[n\)U[aa
new ImprovedMergeSort(), uwIc963
new HeapSort() uYG^Pc^v
}; WP**a Bp
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public static String toString(int algorithm){ B@v\eF;
return name[algorithm-1]; ,3DXFV'uxb
} Fig&&b a
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public static void sort(int[] data, int algorithm) { I3S9Us-\
impl[algorithm-1].sort(data); ?NNn:tiD
} ~3h-jK?
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public static interface Sort { KGHq rc
public void sort(int[] data); `em9T oJV
} SF]@|
1M3%fW
public static void swap(int[] data, int i, int j) { "O>n@Q|
int temp = data; 1r)kR@!LNG
data = data[j]; YA(@5CZ
data[j] = temp; +A_J1iJ<
} H(^bC5'
} $3+PbYY