[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; FR}H$R7#
} sv;zvEn;-L
int i1=l; ZW?7g+P
int i2=mid+1; 4{DeF@@
for(int cur=l;cur<=r;cur++){ yo*iv+l
if(i1==mid+1) /,Rca1W
data[cur]=temp[i2++]; nFfCw%T?
else if(i2>r) }91mQ`3
data[cur]=temp[i1++]; H<;Fb;b
else if(temp[i1] data[cur]=temp[i1++]; *!'&:
else mU=6"A0 U
data[cur]=temp[i2++]; |\a:]SlH
} Ib2@Wi
} KCk?)Qv
S(J\<)b
} mei_aN7zW
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改进后的归并排序: A&P1M6Of
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package org.rut.util.algorithm.support; s\W
kppRQ Q*[
import org.rut.util.algorithm.SortUtil; z}1xy+
}o^A^
/** g&4~nEp
* @author treeroot z/KZ[qH\
* @since 2006-2-2 4*vas]
* @version 1.0 ~RXpz-Ye
*/ BZ?W>'B%$
public class ImprovedMergeSort implements SortUtil.Sort { aEDN]O95?
zcB2[eaV
private static final int THRESHOLD = 10; C|f7L>qe
"rGOw'!q>
/* y<`?@(0$
* (non-Javadoc) q.MVF]
* xD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nuQ6X5>.=
*/ $G_Q`w=jM
public void sort(int[] data) { ,Us2UEWNv
int[] temp=new int[data.length]; >J}n@MZ
mergeSort(data,temp,0,data.length-1); 5!ubY 6Ph
} zw:C*sY
*>'2$me=
private void mergeSort(int[] data, int[] temp, int l, int r) { p%"yBpSK
int i, j, k; ^v!im\ r
int mid = (l + r) / 2; DvX3/z#T
if (l == r) Iv(Qa6(
return; naIv=
if ((mid - l) >= THRESHOLD) .NkAD-k`
mergeSort(data, temp, l, mid); cH;TnuX
else D4q>R;
insertSort(data, l, mid - l + 1); YvruK:I
if ((r - mid) > THRESHOLD) "W@XP+POAY
mergeSort(data, temp, mid + 1, r); ,<3uc
else ?Hi}nsw
insertSort(data, mid + 1, r - mid); NGD*ce"w
ns#~}2"d
for (i = l; i <= mid; i++) { MdH97L)L.0
temp = data; iS"8X#[]N
} XY{:tR_al
for (j = 1; j <= r - mid; j++) { VI24+h'J
temp[r - j + 1] = data[j + mid]; )_8}53C
} :Sc8PLT
int a = temp[l]; -~][0PVL9
int b = temp[r]; Vf0fT?/K
for (i = l, j = r, k = l; k <= r; k++) { ZCQ<%f
if (a < b) { 7':f_]
data[k] = temp[i++]; h}|6VJ@.
a = temp; 1s`)yu^`v
} else { %l}Q?Z
data[k] = temp[j--]; @8nLQh^
b = temp[j]; qWO]s=V!
} nlzW.OLM
} 1n'$Ji7
} #SQvXMT
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/** Y}LLOj@L
* @param data ~XUOWY75
* @param l uxOJ3
* @param i RzS|dGNQE
*/ bar0{!Y"
private void insertSort(int[] data, int start, int len) { 5g``30:o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wmo{YS3t|
} l(%k6
} q_T]9d
} k&)K(
} CV&zi6
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堆排序： mX&xn2}qZ"
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package org.rut.util.algorithm.support; \+k, :8s/
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import org.rut.util.algorithm.SortUtil; 'y9*uT~
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/** 5vTv$2@
* @author treeroot (=1q!c`
* @since 2006-2-2 $n= O
* @version 1.0 84=-Lw
*/ yo'9x s
public class HeapSort implements SortUtil.Sort{ X>8-`p
b~_B [cf
/* (non-Javadoc) 4:vTxNs&S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z)lM2x>|*
*/ pkXv.D`
public void sort(int[] data) { HU &)
MaxHeap h=new MaxHeap(); HG2GZ}~^1
h.init(data); [yw%ih)
for(int i=0;i h.remove(); _Vjpw,
System.arraycopy(h.queue,1,data,0,data.length); 2sKG(^=Z
} .^i<xY
:l+_ja&o
private static class MaxHeap{ z%V*K
DVI7]+=nV
void init(int[] data){ ITyzs4"VV
this.queue=new int[data.length+1]; sVu k
for(int i=0;i queue[++size]=data; .H8mRvd?
fixUp(size); %}C9
} &1wpGJqm
} qZaO&"q
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private int size=0; *z0K%@M
D(Qa>B"1
private int[] queue; W57&\PXYn
kMy<G8 s
public int get() { nv"G;W
return queue[1]; p8=|5.
} Qyz>ZPu}sz
u4YM^* S.
public void remove() { &Yp+k}XU
SortUtil.swap(queue,1,size--); Xo Y7/&&
fixDown(1); @,k7xm$u
} nfX12y_SXL
file://fixdown 2"@Ft()]
private void fixDown(int k) { K;x~&G0=
int j; cw;co@!$
while ((j = k << 1) <= size) { iZQ\ m0Zc
if (j < size %26amp;%26amp; queue[j] j++; mDfwn7f
if (queue[k]>queue[j]) file://不用交换 #vQ?
break; P@gtdi(Q
SortUtil.swap(queue,j,k); Ep mJWbU
k = j; cC%j!8!
} @l~7x
} "tL2F*F"6X
private void fixUp(int k) { 7 _g+^e-"
while (k > 1) { x;j{} %
int j = k >> 1; ==N` !+
if (queue[j]>queue[k]) 66Gx.tE
break; (SF1y/g@=
SortUtil.swap(queue,j,k); Z:@6Lv?CN
k = j; _gW{gLYyJ
} )lh8 k{
} ?E<c[*F05
D`VFf\7
} XJSa]P^B1
R}r~p?(M
} /b#q*x-b
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SortUtil： P16YS8$
)~V}oKk0t
package org.rut.util.algorithm; 5Z{_m;I.
4T`&Sl
import org.rut.util.algorithm.support.BubbleSort; }c% pH{HI
import org.rut.util.algorithm.support.HeapSort; KiAcA]0
import org.rut.util.algorithm.support.ImprovedMergeSort; )TU<:V
import org.rut.util.algorithm.support.ImprovedQuickSort; h*Je35
import org.rut.util.algorithm.support.InsertSort; tPU-1by$
import org.rut.util.algorithm.support.MergeSort; bLbR IY"l
import org.rut.util.algorithm.support.QuickSort; \"x>JW4w
import org.rut.util.algorithm.support.SelectionSort; :)IV!_>'d
import org.rut.util.algorithm.support.ShellSort; (a.1M8v+Sg
)eYDQA>J
/** ewnfeg1
* @author treeroot rbyY8 bX
* @since 2006-2-2 "MnSJ2
* @version 1.0 YT=eVg53
*/ & Kmy}q
public class SortUtil { yNa;\UF
public final static int INSERT = 1; ffE#^|
public final static int BUBBLE = 2; GK?4@<fY
public final static int SELECTION = 3; VFj(M j`}G
public final static int SHELL = 4; /0lC KU!=
public final static int QUICK = 5; S~)w\(r
public final static int IMPROVED_QUICK = 6; x<ax9{
public final static int MERGE = 7; M2@;RZ(|
public final static int IMPROVED_MERGE = 8; ?n]FNjd
public final static int HEAP = 9; |~K(F<;j
+Ok%e.\ZM
public static void sort(int[] data) { 6|!NLwa
sort(data, IMPROVED_QUICK); {38\vX,I(w
} Z\? E3j
private static String[] name={ aV6#t*\J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KX3KM!*
}; `8:K[gp
$`ztiVu3
private static Sort[] impl=new Sort[]{ ?6P.b6m}0
new InsertSort(), *(QH{!-$s
new BubbleSort(), a1c1k}
new SelectionSort(), @dgH50o[
new ShellSort(), WVX`<
new QuickSort(), Qi9-z'
new ImprovedQuickSort(), E0l_--
new MergeSort(), \+nGOvM
new ImprovedMergeSort(), 3`F) AWzdr
new HeapSort() =Z,5$6%)
}; M#,Q ^rH#
j6g@tx^)'
public static String toString(int algorithm){ 8=;k"
return name[algorithm-1]; 'bu)M1OLi
} 4w$_]ke
(\,BxvhG=
public static void sort(int[] data, int algorithm) { osHCg
impl[algorithm-1].sort(data); 9}P"^N
} Gy"%R-j7
U \oy8FZ
public static interface Sort { kV&9`c+
public void sort(int[] data); aeP[+I9
} cpZc9;@IC
S%mfs!E>
public static void swap(int[] data, int i, int j) { Ug%_@t/?
int temp = data; jQh^WmN
data = data[j]; {Wv%zA*8
data[j] = temp; >v+jh(^
} U|@V 74
} h7yqk4'Lq