[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; =7pLU+ u
} j4Ppn
int i1=l; &NiDv
int i2=mid+1; A$.woE@
for(int cur=l;cur<=r;cur++){ l/0TNOA
if(i1==mid+1) .dwb@$
data[cur]=temp[i2++]; /M(FuV
else if(i2>r) Q`}1 B
data[cur]=temp[i1++]; #aUe7~
else if(temp[i1] data[cur]=temp[i1++]; pfsRV]
else k ]C+/
data[cur]=temp[i2++]; n.P$7%G`2
} jrT5Rw_}q
} Wo&10S w
\hv1"WaJ
} ?LAKH$t
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改进后的归并排序: bv,_7UOG
4L\bT;dQ|.
package org.rut.util.algorithm.support; $$`E@\5P
i2`i5&*
import org.rut.util.algorithm.SortUtil; "mr;|$Y
i3g;B?54
/** TWE$@/9)g
* @author treeroot M6U/. n
* @since 2006-2-2 os*QWSs
* @version 1.0 |9.`qv
*/ 0p\R@{
public class ImprovedMergeSort implements SortUtil.Sort { fXCx!3m
^,[V;3
private static final int THRESHOLD = 10; 6N[XWyS
d51l7't
/* 4SSq5Ve<
* (non-Javadoc) (r,tU(
* d4<Ic#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uV?[eiezD0
*/ R06q~>
public void sort(int[] data) { Qag@#!&n
int[] temp=new int[data.length]; E8#r<=(m
mergeSort(data,temp,0,data.length-1); so_
} +o})Cs`|=A
H)aeSF5
private void mergeSort(int[] data, int[] temp, int l, int r) { GPnd7}Tn
int i, j, k; HT7V} UiaO
int mid = (l + r) / 2; C(7uvQ
if (l == r) xb$eFiQ
return; +V*FFv
if ((mid - l) >= THRESHOLD) Un\h[m
mergeSort(data, temp, l, mid); )? WiO}"
else OLpE0gZ.|`
insertSort(data, l, mid - l + 1); v`8dRVN
if ((r - mid) > THRESHOLD) y)_T!&ze
mergeSort(data, temp, mid + 1, r); Pda(O;aNU
else -#T?C]}
insertSort(data, mid + 1, r - mid); I;kKY
is_`UDaB
for (i = l; i <= mid; i++) { bJ8G5QU
temp = data; O.4ty)*
} (m|w&oA/
for (j = 1; j <= r - mid; j++) { RkP g&R;i
temp[r - j + 1] = data[j + mid]; v WKUV|
} FRpTYLA2
int a = temp[l]; hp?hb-4l
int b = temp[r]; H^P uC (
for (i = l, j = r, k = l; k <= r; k++) { +FiM?,G
if (a < b) { ._JM3o}F
data[k] = temp[i++]; ZZqImB.Cz6
a = temp; )u~LzE]{_
} else { Xao 0cb.R
data[k] = temp[j--]; :=x-b3U
b = temp[j]; =BW>jD
} J8w#J
} gHc0n0ZV
} 5]n5nqz
c%Ht; sK`*
/** JI-q4L|
* @param data AK%2#}k.
* @param l FaO1?.
* @param i f6n'g:&.W
*/ IKSe X
private void insertSort(int[] data, int start, int len) { e-vL!&;2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H/m -$;cF3
} CbTYt6DC
} 6u^MfOc
} rxtp?|v9
} r<4FF=
+BcJHNIB
堆排序： v#i,pBj
2OFrv=F
package org.rut.util.algorithm.support; 3]Rb2$p[=
J{c-'Of2yi
import org.rut.util.algorithm.SortUtil; `[x`#irD
iDej{95
/** xKIzEN &
* @author treeroot "F%w{bf
* @since 2006-2-2 m }I@:s2
* @version 1.0 d;UP|c>2
*/ :/'2@M
public class HeapSort implements SortUtil.Sort{ 3n-~+2l
9fR`un)f}
/* (non-Javadoc) y\7 -!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vL~nJv
*/ Ig*68M<
public void sort(int[] data) { 2:0'fNXop
MaxHeap h=new MaxHeap(); =jZ}@L/+
h.init(data); )Cl!,m)~
for(int i=0;i h.remove(); NU>={9!
System.arraycopy(h.queue,1,data,0,data.length); u'}SaX]0
} m3zmyw}
CC,_I>t
private static class MaxHeap{ :^".cs?g
luD.3&0n
void init(int[] data){ W.b?MPy]
this.queue=new int[data.length+1]; b,U"N-6
for(int i=0;i queue[++size]=data; 1s5FjD?M
fixUp(size); lJHV c"*/
} ^b)8l
} g/Q hI
]#>;C:L
private int size=0; 8$</HNu,
Z%_"-ENT
private int[] queue; [>l2E
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public int get() { w~EBm=v_>
return queue[1]; 1"k"<{%
} ir^%9amh
Dj!v+<b
public void remove() { ;w,+x 7
SortUtil.swap(queue,1,size--); 8nn%wps
fixDown(1); .*+?]
} 9Qja|;
file://fixdown CD|)TXy
private void fixDown(int k) { PMPB}-d
int j; .{U@Hva_K
while ((j = k << 1) <= size) { ?CSc5b`eo
if (j < size %26amp;%26amp; queue[j] j++; gaeMcL_^a
if (queue[k]>queue[j]) file://不用交换 8!87p?Mz
break; R_iQLBrd
SortUtil.swap(queue,j,k); f4F13n_0X
k = j; wxw3t@%mNm
} hxcRFqX"
} 9 -7.4!]I
private void fixUp(int k) { U1zcJl^
while (k > 1) { m]t`;lr<
int j = k >> 1; HmxA2 ~C
if (queue[j]>queue[k]) k@QU<cvI
break; V2-fJ!
SortUtil.swap(queue,j,k); _?]E)i'RI
k = j; w7d(|`
} CMk0(sztU_
} Y"J' 'K
q)S70M_1
} x;d*?69f]
UuDs
} [k)xn3[
AWkXWl}
SortUtil： dN'2;X
Jo%5NXts4
package org.rut.util.algorithm; .~J}80a/
dUAZDoLi
import org.rut.util.algorithm.support.BubbleSort; :oRR1k
import org.rut.util.algorithm.support.HeapSort; 8^bc4(H
import org.rut.util.algorithm.support.ImprovedMergeSort; 7RW5U'B
import org.rut.util.algorithm.support.ImprovedQuickSort; Ww8<f$
import org.rut.util.algorithm.support.InsertSort; 05_aL` &eb
import org.rut.util.algorithm.support.MergeSort; =2;2_u?
import org.rut.util.algorithm.support.QuickSort; -"m4 A0
import org.rut.util.algorithm.support.SelectionSort; 3/+r*lv>X
import org.rut.util.algorithm.support.ShellSort; qfF/X"#0
')]K&
/** NCm>iEeY
* @author treeroot xw2dEvjgp%
* @since 2006-2-2 jhs('n,
* @version 1.0 XN+~g.0
*/ "VEA71
public class SortUtil { d4'*K1m
public final static int INSERT = 1; Gwl]sMJ
public final static int BUBBLE = 2; /F#_~9JXG
public final static int SELECTION = 3; h>jLhj<07W
public final static int SHELL = 4; R+}x#
public final static int QUICK = 5; \^=Wp'5R
public final static int IMPROVED_QUICK = 6; or2BG&W
public final static int MERGE = 7; X~ca8!Dq
public final static int IMPROVED_MERGE = 8; 6|#+
public final static int HEAP = 9; VK/@jrL+
SRL`!
public static void sort(int[] data) { sfLH[Q?
sort(data, IMPROVED_QUICK); 3awh>1N2W
} jkz.qo-%
private static String[] name={ :)/%*<vq,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~hYTs
}; 8^/V2;~^,>
mc{gcZIm
private static Sort[] impl=new Sort[]{ >GRL5Iow
new InsertSort(), O0|**Km\+
new BubbleSort(), '3B\I#
new SelectionSort(), cY&SKV#
new ShellSort(), /{|<3CEe
new QuickSort(), EvA{@g4>
new ImprovedQuickSort(), \SA"DT
new MergeSort(), G8Hj<3`
new ImprovedMergeSort(), ] T`6Hz!
new HeapSort() JPeZZ13sS
}; TRB)cJZ?
p1zT]
public static String toString(int algorithm){ aD5jy
return name[algorithm-1]; B.:DW3
} dy>iIc>
RL0#WBR
public static void sort(int[] data, int algorithm) { 014p= W
impl[algorithm-1].sort(data); P<Wtv;Z1Z
} g[Tl#X7F
] qT\z<}
public static interface Sort { N#C"@,}Y
public void sort(int[] data); eVRFb#EU0e
} `jl 1Q,~2r
irqNnnMGEa
public static void swap(int[] data, int i, int j) { cQ:Y@f 9
int temp = data; d[h2Y/AR
data = data[j]; 'A#`,^]uLF
data[j] = temp; -c%K_2`
} )9(Mt_
} v=-8} S