[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; #y&O5
} L@HWm;aN
int i1=l; CERT`W%o
int i2=mid+1; ;v^1V+1:z
for(int cur=l;cur<=r;cur++){ J 4OgV?
if(i1==mid+1) ,a/<t"
data[cur]=temp[i2++]; h\i>4^]X.
else if(i2>r) ^w|apI~HSE
data[cur]=temp[i1++]; 4w5mn6MxR
else if(temp[i1] data[cur]=temp[i1++]; u$?t |Ll
else R3=]Av46
data[cur]=temp[i2++]; 9n#Em
} ![*7HE>},
} Pe_FW8e#J
O}IRM|r"
} V,CVMbn/%N
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改进后的归并排序: 0QxE6>xL=
<^(g<B`>
package org.rut.util.algorithm.support; &.}Zj*BD
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import org.rut.util.algorithm.SortUtil; Tp?l;DU
{g(-C&
/** c={bunnz#
* @author treeroot x:O;Z~ |.
* @since 2006-2-2 7xmif YC
* @version 1.0 #c:b8rw
*/ uY6|LTK&x
public class ImprovedMergeSort implements SortUtil.Sort { APA:K9jD
;<=B I!
private static final int THRESHOLD = 10; ~'9>jpnw
1ZF>e`t8
/* \.%GgTF
* (non-Javadoc) p/k6}Wl
* CgO&z<A!&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M'4$z^@Z
*/ qJZ5w}
public void sort(int[] data) { 9cm9;
int[] temp=new int[data.length]; D8''q%
mergeSort(data,temp,0,data.length-1); C`0;
} M@/Hd0$
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private void mergeSort(int[] data, int[] temp, int l, int r) { E{Ux|r~
int i, j, k; JBKCa 3
int mid = (l + r) / 2; pjP R3 r
if (l == r) XeT{y]lkd
return; &m>sGCZ
if ((mid - l) >= THRESHOLD) ?$#,h30
mergeSort(data, temp, l, mid); (7qdrAeP
else #K3`$^0 s
insertSort(data, l, mid - l + 1); >$yqx1=jW
if ((r - mid) > THRESHOLD) DVWqrK}q
mergeSort(data, temp, mid + 1, r); CI )89`
else k7gm)}RKcu
insertSort(data, mid + 1, r - mid); DJmT]Q]o)
0cwb^ffN
for (i = l; i <= mid; i++) { e5 ?;{H
temp = data; TEK]$%2
} eaxp(VX?oy
for (j = 1; j <= r - mid; j++) { [*k25N
temp[r - j + 1] = data[j + mid]; Iw<: k
} dk^Uf84.Gr
int a = temp[l]; 7O,y%NWaK
int b = temp[r]; }RvP*i
for (i = l, j = r, k = l; k <= r; k++) { @l:o0(!W
if (a < b) { JPt=~e(
data[k] = temp[i++]; 18AKM
a = temp; dSkW[r9Z%l
} else { E?z~)0z2`
data[k] = temp[j--]; ^atX/
b = temp[j]; cN5,\I.
} 9y~5@/32R
} \MA4>
} $bd&$@sA
azxGUS_i<
/** #Wz7ju;
* @param data w)hH8jx{
* @param l &ZRriqsQg
* @param i EC4RA'Bg1k
*/ .qcIl)3
private void insertSort(int[] data, int start, int len) { !4(X9}a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xSQ:#o=8G
} <=D\Ckmb
} 5)rMoYn25
} s5DEuu>g
} V4PV@{G
P)2.Gx/
堆排序： )\bA'LuFy
9"=1 O
package org.rut.util.algorithm.support; a&Stdh
KL8G2"Z
import org.rut.util.algorithm.SortUtil; 2k}" 52
P@m_tA%
/** )e$}sw{t
* @author treeroot |(Bc0sgw}
* @since 2006-2-2 3Vu_-.ID
* @version 1.0 $fhb-c3
*/ r{V=)h
public class HeapSort implements SortUtil.Sort{ %V+hm5Q
R<J1bH1n3
/* (non-Javadoc) _7h:NLd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g8JO/s5xV
*/ <@DF0x!
public void sort(int[] data) { O]>FNsh!
MaxHeap h=new MaxHeap(); LovVJ^TD0i
h.init(data); vnNX)$f
for(int i=0;i h.remove(); P9Yw\
System.arraycopy(h.queue,1,data,0,data.length); 0~(K@U>#
} YTc X4cC
{xFgPtCM
private static class MaxHeap{ zT\nj&7
[p+]H?(A
void init(int[] data){ (V:z7
this.queue=new int[data.length+1]; =V- ^
for(int i=0;i queue[++size]=data; V!Px975P
fixUp(size); ScgaWJ
} gH+s)6
} |4J ;s7us
3KyIBrdi?
private int size=0; +:a#+]g
=i4%KF9x
private int[] queue; ig Q,ZY1
>tmv3_<=
public int get() { A)2eo<ij4
return queue[1]; V__|NVoOm
} C#^V<:9
B1x# 7>K
public void remove() { N-0kB vo
SortUtil.swap(queue,1,size--); (;9-8Y&_d
fixDown(1); $ ]ew<j
} y@#JzfY?Hr
file://fixdown %j.B/U$
private void fixDown(int k) { #%~PNki
int j; (R.l{(A
while ((j = k << 1) <= size) { o =oXL2}
if (j < size %26amp;%26amp; queue[j] j++; g[D(]t\#x
if (queue[k]>queue[j]) file://不用交换 Y<4%4>a
break; >TB"Ez09
SortUtil.swap(queue,j,k); G`/5=
k = j; kB2]Z}
} P}2i[m.*,
} 3 #8bG(
private void fixUp(int k) { f: j9ze
while (k > 1) { w$XqxI/&
int j = k >> 1; >@g+%K]
if (queue[j]>queue[k]) HX;JO[0
break; \E(Negt7
SortUtil.swap(queue,j,k); ` XvuyH
k = j; n=z=%T6
} Ft<6`C
} %4=r .9
LpQ=Y]{j
} o*fNY
n(}W[bZ4
} oMb&a0-7u
c'wxCqnE
SortUtil： Y<]A5cm
w$aiVOjgT
package org.rut.util.algorithm; 1}7Q2Ad w
8_d>=*(
import org.rut.util.algorithm.support.BubbleSort; dR9[K4`p/
import org.rut.util.algorithm.support.HeapSort; m]7oTmS
import org.rut.util.algorithm.support.ImprovedMergeSort; n$*e(
import org.rut.util.algorithm.support.ImprovedQuickSort; L@|xpq
import org.rut.util.algorithm.support.InsertSort; #OQT@uF!
import org.rut.util.algorithm.support.MergeSort; A-&'/IHR"B
import org.rut.util.algorithm.support.QuickSort; (GeOD V?U
import org.rut.util.algorithm.support.SelectionSort; w1Xe9'$Qb
import org.rut.util.algorithm.support.ShellSort; e5s=@-[
^Fn~@'
/** B24,;2J
* @author treeroot xJ);P.
* @since 2006-2-2 7;8#iS/
* @version 1.0 CDT%/9+-
*/ ]8m_+:`=
public class SortUtil { 6T qs6*
public final static int INSERT = 1; 7)i6L'r
public final static int BUBBLE = 2; -p-<mC@<&S
public final static int SELECTION = 3; V-7A80!5
public final static int SHELL = 4; RBA{!
public final static int QUICK = 5; CJ~gE"
public final static int IMPROVED_QUICK = 6; URo#0fV4C
public final static int MERGE = 7; Xi:y35q
public final static int IMPROVED_MERGE = 8; ,rU>)X
public final static int HEAP = 9; ;X zfd
U2DE zr
public static void sort(int[] data) { ,S%DHT
sort(data, IMPROVED_QUICK); vNA~EV02
} =SUCcdy&
private static String[] name={ a(s%3"*Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U WU PY
}; 3G.-JLhs
s|O4>LsG
private static Sort[] impl=new Sort[]{ <5xlP:Cx
new InsertSort(), O-N@HZC
new BubbleSort(), tLD(%s_
new SelectionSort(), GGWdMGI/
new ShellSort(), |4_[wX r
new QuickSort(), h{Zd, 9H
new ImprovedQuickSort(), gK6_vS4K)
new MergeSort(), m%p;>:"R
new ImprovedMergeSort(), pR,eus;8
new HeapSort() 8rNRQOXOa
}; j,J/iJs
{SOy-
public static String toString(int algorithm){ @((Y[<
return name[algorithm-1]; &~ .n}h&
} 2Sha&Z*CE
&x#3N=c#
public static void sort(int[] data, int algorithm) { iiWm>yy
impl[algorithm-1].sort(data); yQ/E0>Uj!
} DOa%|H'P
ukAE7O(W&
public static interface Sort { :W6R]y
public void sort(int[] data); KB\A<(o,
} +FGw)>g8'm
5/f"dX
public static void swap(int[] data, int i, int j) { gNj~o^6|@
int temp = data; <`P7^ 'z!
data = data[j]; 1oSU>I_i
data[j] = temp; VS\+"TPuH
} 0+m4 }]6l
} <W2YG6^i