[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; P{QHG 3
} d8 Jf3Mo
int i1=l; 7hPwa3D^
int i2=mid+1; ]i0=3H2
for(int cur=l;cur<=r;cur++){ xqY'-Hom
if(i1==mid+1) B@dCCKc%/
data[cur]=temp[i2++]; /|}yf/^9X
else if(i2>r) Q}<QE:-&E
data[cur]=temp[i1++]; ?mK&Slh.
else if(temp[i1] data[cur]=temp[i1++]; E11C@%
else &&LB0vH!J
data[cur]=temp[i2++]; Hsv)] %p
} $YY{|8@kjv
} 0QfDgDX
oyk&]'>
} OX]P;#4tU
<,/7:n
改进后的归并排序: 1t^9.!$@y
ln8NcAEx
package org.rut.util.algorithm.support; Kj3Gm>B<y
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import org.rut.util.algorithm.SortUtil; a.?U$F
~@-r
/** 9xzow,mi
* @author treeroot m]fUV8U
* @since 2006-2-2 kRX?o'U~C
* @version 1.0 )YAU|sCAi$
*/ ?r8hl.Z>
public class ImprovedMergeSort implements SortUtil.Sort { C^B$_?
NR k~
private static final int THRESHOLD = 10; #wRhR>6
VX8CEO
/* X;)/<:mX
* (non-Javadoc) 1>L'F8"
* U{[YCs fk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) );t+~YPS
*/ CX\XaM)l
public void sort(int[] data) { 2?Jw0Wq5D
int[] temp=new int[data.length]; Xfqin4/jC
mergeSort(data,temp,0,data.length-1); m}RZ)c
} m9:ah<
ty[p5%L1
private void mergeSort(int[] data, int[] temp, int l, int r) { A]i!131{w|
int i, j, k; u "k< N|.3
int mid = (l + r) / 2; v;;3 K*c>
if (l == r) g<0K i^#
return; )mBYW}} T
if ((mid - l) >= THRESHOLD) `Z5dRLrd
mergeSort(data, temp, l, mid); R0tT4V+
else $)o0{HsL+
insertSort(data, l, mid - l + 1); ,&M#[>\(3
if ((r - mid) > THRESHOLD) 5.&)hmpg
mergeSort(data, temp, mid + 1, r); KZZY9
else ivq(eKy
insertSort(data, mid + 1, r - mid); YCxwIzIR
xYYa%PhIC
for (i = l; i <= mid; i++) { \6?a
temp = data; $rr@3H+
} )qbkKCq/FB
for (j = 1; j <= r - mid; j++) { 1kL8EPT%o
temp[r - j + 1] = data[j + mid]; @,k5T51m
} +M_ _\7
int a = temp[l]; {CBb^BP
int b = temp[r]; zN]%p>,)HB
for (i = l, j = r, k = l; k <= r; k++) { O]@#53)Tz
if (a < b) { F5/,S
data[k] = temp[i++]; jED.0,+K!
a = temp; gz[3xH~
} else { *.|%uf.
data[k] = temp[j--]; YJ"D"QD
b = temp[j]; VlA]A,P}i
} $VF,l#aR
} w0=
} U-fxlg|-C
+8N6tw/&
/** fpo{`;&F
* @param data 0: hv6Ge^
* @param l f?k0(rl
* @param i ?%Nh4+3N>
*/ ztSQrDbbb4
private void insertSort(int[] data, int start, int len) { lm;hW&O9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ={oNY.(Q
} Hh=fv~X
} ~KMah
} DWKQ>X6
} F.$z7ee@
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堆排序： Y 2ANt w@
XxmWj-=qO
package org.rut.util.algorithm.support; <O'U-. Gc
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import org.rut.util.algorithm.SortUtil; ySO\9#Ho
jmr .gW
/** UcQ]n0J=Z
* @author treeroot z6E =%-`
* @since 2006-2-2 4mo/MK&M:
* @version 1.0 _`\!+qGq
*/ 1;=L] L?
public class HeapSort implements SortUtil.Sort{ [C6ba{9B
[ZSC]w^
/* (non-Javadoc) \/3(>g?4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f- 9t
*/ e~lFjr]
public void sort(int[] data) { VrZfjpV
MaxHeap h=new MaxHeap(); gUx}vE-
h.init(data); U; oXX
for(int i=0;i h.remove(); VmPh''Z%-
System.arraycopy(h.queue,1,data,0,data.length); G'/GDN^j
} @s-P!uCaT
_<.VP
private static class MaxHeap{ mk1R~4v
\]Ah=`
void init(int[] data){ Ex p?x
this.queue=new int[data.length+1]; 15j5F5P
for(int i=0;i queue[++size]=data; C][hH?.
fixUp(size); %[*-aA
} St%x\[D
} :gwmk9LZ
9#:nlu9
private int size=0; JL87a^ro
E72N=7v"
private int[] queue; GE!nf6>Km
"t4z)j;
public int get() { :P_h_Tizv
return queue[1]; _j, Tc*T
} UDi(7c0.
Pt5wm\
public void remove() { $mM"C+dD
SortUtil.swap(queue,1,size--); 4%r?(C0x
fixDown(1); VX.LL 5
} Sr6'$8#>Y
file://fixdown ^;PjO|mD Z
private void fixDown(int k) { ZNw|5u^N
int j; g.9C>>tj
while ((j = k << 1) <= size) { g3kbsi7_:
if (j < size %26amp;%26amp; queue[j] j++; vf3)T;X>
if (queue[k]>queue[j]) file://不用交换 wL),/i&<
break; *x2!N$b
SortUtil.swap(queue,j,k); j67a?0<C2U
k = j; aYa`ex
} e x Z/
} /Kli C\
private void fixUp(int k) { R5=J:o
while (k > 1) { G>vK$W$f N
int j = k >> 1; rogy`mh\r2
if (queue[j]>queue[k]) ZUHW*U.
break; Lld45Bayb
SortUtil.swap(queue,j,k); rwj+N%N
k = j; }>@SyE'Q
} }cMkh
} :} =lE"2
a+LK~mC*
} 3#,6(k4>
7(o`>7x*
} *Ze0V9$'
F*U(Wl=
SortUtil： kBk>1jn"
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package org.rut.util.algorithm; 'm*W<
> .NLmzUX
import org.rut.util.algorithm.support.BubbleSort; kB@gy}
import org.rut.util.algorithm.support.HeapSort; f{VV U/$
import org.rut.util.algorithm.support.ImprovedMergeSort; -b!Z(}JK
import org.rut.util.algorithm.support.ImprovedQuickSort; >C_G~R
import org.rut.util.algorithm.support.InsertSort; u=nd7:bv
import org.rut.util.algorithm.support.MergeSort; $rW(*#C
import org.rut.util.algorithm.support.QuickSort; i=<;$+tW
import org.rut.util.algorithm.support.SelectionSort; X9?)P5h=
import org.rut.util.algorithm.support.ShellSort; %( 7##f_
0^>,
/** L3\#ufytb
* @author treeroot npzp/mcIe)
* @since 2006-2-2 h'em?fN(
* @version 1.0 /Yi4j,8!|
*/ FLG"c690
public class SortUtil { c?CfM>
public final static int INSERT = 1; d%k7n+ICQ4
public final static int BUBBLE = 2; 8:c=h/fa
public final static int SELECTION = 3; +r"}@8/\1
public final static int SHELL = 4; 2R,} j@
public final static int QUICK = 5; TsT5BC63
public final static int IMPROVED_QUICK = 6; X>`03?L
public final static int MERGE = 7; qZF&^pCF}
public final static int IMPROVED_MERGE = 8; mmJnE
public final static int HEAP = 9; 1A'eH:$
;8PO}{rD
public static void sort(int[] data) { zB0*KgAn{
sort(data, IMPROVED_QUICK); bDl#806PL
} MuMq%uDA"
private static String[] name={ F<{,W-my `
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t<fah3hl
}; )e5=<'f1
5QK%BiDlr
private static Sort[] impl=new Sort[]{ kP$E+L
new InsertSort(), D|(\5]:R
new BubbleSort(), rP]|`*B
new SelectionSort(), rkji#\_-FV
new ShellSort(), 3m75mny
new QuickSort(), D)x^?!
new ImprovedQuickSort(), uz+WVmb
new MergeSort(), A^FkU
new ImprovedMergeSort(), Tk[]l7R~
new HeapSort() .n8O 3V
}; 7~+Fec`Ut*
O^CBa$
public static String toString(int algorithm){ $\*Z
return name[algorithm-1]; h[qZM
} 4GI3|{
}*rSg .
public static void sort(int[] data, int algorithm) { Htr]_<@
impl[algorithm-1].sort(data); eY#^vB
} ZqrS]i@$
6bUP]^d
public static interface Sort { 6M&ajl`o
public void sort(int[] data); &'i_A%V
} :|kO}NGM
&&l ZUR,`
public static void swap(int[] data, int i, int j) { *(5;5r
int temp = data; 75p9_)>96
data = data[j]; 9;%$
data[j] = temp; @&m]:GR
} G{6@]72
} ?jfh'mCA