[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; zs:7!
} j1C.#-P[
int i1=l; 9tEKA|8
int i2=mid+1; 49$4
for(int cur=l;cur<=r;cur++){ fEc_r:|\6
if(i1==mid+1) cZzZNGY^ts
data[cur]=temp[i2++]; /xbZC{R
else if(i2>r) Z+W&C@Uw
data[cur]=temp[i1++]; ^ks^9*'|j
else if(temp[i1] data[cur]=temp[i1++]; =ol][)Bd
else F s\P/YX
data[cur]=temp[i2++]; cB}2(`z9 B
} ,O)\,tg
} DOIWhd5:
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} RbM~E~$
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改进后的归并排序: kw:D~E(
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package org.rut.util.algorithm.support; Le JlTWotC
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import org.rut.util.algorithm.SortUtil; 4Z9 3g{
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/** J\$l3i/I
* @author treeroot R<HZC;x
* @since 2006-2-2 [5*-V^m2
* @version 1.0 UjOhaj "h
*/ |I5?5 J\
public class ImprovedMergeSort implements SortUtil.Sort { *m@w^In^
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private static final int THRESHOLD = 10; A<5`[<x$
WbWW=(N'd
/* xBfe8lor
* (non-Javadoc) LC\:xia{X
* J8BT%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :_a]T-GL
*/ 1 "7#|=1/
public void sort(int[] data) { cu?(P;mQi
int[] temp=new int[data.length]; ]U1,NhZu
mergeSort(data,temp,0,data.length-1); 4`P2FnJ?
} b Ne\{k
H8]^f=
private void mergeSort(int[] data, int[] temp, int l, int r) { %O=V4%"m\
int i, j, k; Zt2@?w;
int mid = (l + r) / 2; xM//]
if (l == r) ]N"F?3J 8
return; X7d.Ie
if ((mid - l) >= THRESHOLD) fP1OH&Ar
mergeSort(data, temp, l, mid); sVdK^|j
else ('6g)@=\U
insertSort(data, l, mid - l + 1); &qP-x98E?
if ((r - mid) > THRESHOLD) tZ j,A%<
mergeSort(data, temp, mid + 1, r); :U.)YHY
else rL sK-qQ
insertSort(data, mid + 1, r - mid); "5JNXo,H
[H%?jTQ
for (i = l; i <= mid; i++) { LsQ8sFP_"
temp = data; b\;u9C2y'
} 3|+f si)x
for (j = 1; j <= r - mid; j++) { H..ZvGu
temp[r - j + 1] = data[j + mid]; ,Zf!KQw
} J-\?,4mcP
int a = temp[l]; _+04M)q0
int b = temp[r]; }t%>_
for (i = l, j = r, k = l; k <= r; k++) { _d| 62VS
if (a < b) { 1 j^c
data[k] = temp[i++]; kTZx-7~
a = temp; U%t/wq
} else { 8{<[fZyC
data[k] = temp[j--]; [&qbc#L
b = temp[j]; a950M7
} mHEf-6|C`
} 7Jx-W|
} C{hcK 1-K
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/** soq".+Q
* @param data qm}>J^hnB#
* @param l s>VEuLY*
* @param i Sj{ia2AE_
*/ rt^45~
private void insertSort(int[] data, int start, int len) { ff}a <w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +e8>?dkq
} 3[=`uO0\7
} aR)en{W
} V9E6W*IE
} Lkl|4L
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堆排序： }S vw,c
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package org.rut.util.algorithm.support; "?SOBA!vy
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import org.rut.util.algorithm.SortUtil; H : T N
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/** Lubs{-5lk
* @author treeroot *Cnq2=A]A
* @since 2006-2-2 ^5^}MB%
* @version 1.0 _rMT{q3
*/ j:e^7|.
public class HeapSort implements SortUtil.Sort{ `N,Vs n"
5{FM#@
/* (non-Javadoc) [Yy\>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B80odU&
*/ k?HrD"k"
public void sort(int[] data) { }PFt
MaxHeap h=new MaxHeap(); &=-e`=qJ'6
h.init(data); ]`@]<6
for(int i=0;i h.remove(); *F szGn<
System.arraycopy(h.queue,1,data,0,data.length); O5^J!(.O\Z
} iTLW<wG
{b,2;w}95
private static class MaxHeap{ MxgLztY
Sn(l$wk=
void init(int[] data){ #A3v]'7B
this.queue=new int[data.length+1]; ~n/Aq*
for(int i=0;i queue[++size]=data; TmYP_5g:
fixUp(size); Cfr<D3&,]
} Dr6s^}}~n
} g8,?S6\nMz
^S#\O>GHP
private int size=0; ("?&p3];b
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private int[] queue; kG$E tE#
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public int get() { >:jM}*dnL
return queue[1]; -MrtliepW*
} Eq=wdI
7 DY WdDX
public void remove() { sOl>5:D6
SortUtil.swap(queue,1,size--); oSn! "<x
fixDown(1); Qsg/V]
} 5 o#<`_=J
file://fixdown {Z#e{~m#
private void fixDown(int k) { >I4p9y(u
int j; `S\zqF<
while ((j = k << 1) <= size) { .kc"E
if (j < size %26amp;%26amp; queue[j] j++; I7fb}j`/
if (queue[k]>queue[j]) file://不用交换 *#1y6^
break; fVDDYo2\
SortUtil.swap(queue,j,k); %AG1oWWc>.
k = j; #v4LoNm
} sTtX$&Qu
} )u8*zwq
private void fixUp(int k) { 1yBt/U2
while (k > 1) { !/j,hO4Z4
int j = k >> 1; w; 4jx(
if (queue[j]>queue[k]) iiX\it$s
break; %kh#{*q$
SortUtil.swap(queue,j,k); Q(510)
k = j; iuC7Y|
} 1~2R^#rm
} jg [H}
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} S\e&?Y`
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} N0Efw$u
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SortUtil： y?pD(u
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package org.rut.util.algorithm; e}42/>}#D
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import org.rut.util.algorithm.support.BubbleSort; |h&<_9
import org.rut.util.algorithm.support.HeapSort; "l@A[@R
import org.rut.util.algorithm.support.ImprovedMergeSort; @Od^k#
import org.rut.util.algorithm.support.ImprovedQuickSort; H8@8MFz\
import org.rut.util.algorithm.support.InsertSort; "z^(dF|
import org.rut.util.algorithm.support.MergeSort; q,B3ru.?d
import org.rut.util.algorithm.support.QuickSort; e>l,(ql
import org.rut.util.algorithm.support.SelectionSort; i:o}!RZ>
import org.rut.util.algorithm.support.ShellSort; ZFS7{:
nbI=r+
/** AGOx@;w
* @author treeroot I-b_h5ZD6
* @since 2006-2-2 d2rL 8jW
* @version 1.0 \q~w<%9Dq
*/ 0"EoC
public class SortUtil { "S5S|dBc
public final static int INSERT = 1; XTJvV
public final static int BUBBLE = 2; vSOT*0r
public final static int SELECTION = 3; EgTFwEj
public final static int SHELL = 4; ep+
public final static int QUICK = 5; CjZZm^O
public final static int IMPROVED_QUICK = 6; R?cUy8?'S
public final static int MERGE = 7; _!n}P5
public final static int IMPROVED_MERGE = 8; QR<`pmB~y
public final static int HEAP = 9; 43zUN
+TC1nkX
public static void sort(int[] data) { CqqXVF3
sort(data, IMPROVED_QUICK); <i{K7}':
} .xO _E1Ku;
private static String[] name={ !;%y$$gxh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /XcDYMKgh
}; dY}pN"
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private static Sort[] impl=new Sort[]{ %*lp< D
new InsertSort(), AZ[75>
new BubbleSort(), )kYOHS
new SelectionSort(), pb#mg^8
new ShellSort(), b"``D ?
new QuickSort(), KP3n^ $~
new ImprovedQuickSort(), x97L6!
new MergeSort(), Lf. 1>s
new ImprovedMergeSort(), Sp:l;SGd
new HeapSort() WsR+Np@c
}; 4qhWm"&CM
5[C~wvO
public static String toString(int algorithm){ n`q2s'Pc
return name[algorithm-1]; @mf({Q>
} g\U/&.}DN
wtXY:O
public static void sort(int[] data, int algorithm) { f/}
impl[algorithm-1].sort(data); @F>F#-2
} \m4T3fy
'-vE%U@<
public static interface Sort { #'@ilk/.
public void sort(int[] data); P z ?m>>#
} 38~PWKt
%}q.cV
public static void swap(int[] data, int i, int j) { <l$P&jSF3
int temp = data; Vtb1[cnna
data = data[j]; n`(~OO
data[j] = temp; -4w%Iy
} rK1-Mu
} t9FDU