[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; 9*GL@_c
} |R_xY=z?
int i1=l; :kf3_?9rc
int i2=mid+1; EvGUj$
for(int cur=l;cur<=r;cur++){ Apw-7*/
if(i1==mid+1) !5g)3St
data[cur]=temp[i2++]; rsIt~w
else if(i2>r) ve64-D
data[cur]=temp[i1++]; &?`d8\z
else if(temp[i1] data[cur]=temp[i1++]; ;-<<1Jz/2
else d'**wh,
data[cur]=temp[i2++]; ?kT~)k
} % @^VrhS
} +e{djp@m
EF_h::A_
} Z3u""oM/
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改进后的归并排序: z9uEOX&2\
6):sO/es
package org.rut.util.algorithm.support; 8WLh]MD`
];wohW%
import org.rut.util.algorithm.SortUtil; FZ}C;yUPD
w oY)G7%
/** ZT3jxwe
* @author treeroot U_zpLpm^
* @since 2006-2-2 ' /@!"IXz
* @version 1.0 *YEIG#`
*/ %]P@G^Bv
public class ImprovedMergeSort implements SortUtil.Sort { )Or:wFSMq
.J7-4
private static final int THRESHOLD = 10; W4] 0qp`\
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/* se*pkgWbz
* (non-Javadoc) 'Rar>oU
* H'0J1\ h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (cqA^.Td
*/ RIVN>G[;L
public void sort(int[] data) { e[py J.
int[] temp=new int[data.length]; 5qODS_Eq
mergeSort(data,temp,0,data.length-1); D$^7Xhk
} ve_4@J)
L>R!A3G1
private void mergeSort(int[] data, int[] temp, int l, int r) { hTNYjXj
int i, j, k; 7UEy L }N
int mid = (l + r) / 2; @v:ILby4-
if (l == r) D4x'
return; |SJ% _#=i
if ((mid - l) >= THRESHOLD) C*6bR? I9
mergeSort(data, temp, l, mid); :XZJxgx
else Wf&G9Be?8
insertSort(data, l, mid - l + 1); fb S.
if ((r - mid) > THRESHOLD) Q:xI} ]FM
mergeSort(data, temp, mid + 1, r); YJtOdgG|q
else jWb\"0)
insertSort(data, mid + 1, r - mid); %/,Uk+3p
w|U@jr*H]
for (i = l; i <= mid; i++) { TJGKQyG$L
temp = data; tX2>a
} W3{5Do.h
for (j = 1; j <= r - mid; j++) { oR%E_g?mI~
temp[r - j + 1] = data[j + mid]; )F9%^a(
} mrBhvp""
int a = temp[l]; [4(A458H
int b = temp[r]; _ER cmP
for (i = l, j = r, k = l; k <= r; k++) { 0aq-drl5\
if (a < b) { ]V[
data[k] = temp[i++]; OG<]`!"
a = temp; ysP/@;jC
} else { }X.8.S'
data[k] = temp[j--]; 3kzGL
b = temp[j]; l#(g&x6J
} ~'YSVx& )
} I7-PF?
} Yv`1ySR
]H@uuPT!
/** (Gb{ckzs
* @param data XajY'+DIsz
* @param l Jv$2wH
* @param i Sv]"Y/N
*/ w})&[d
private void insertSort(int[] data, int start, int len) { W SeRV?+T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $F'~^2
} ok=E/77`
} nd9-3W
} IU"!oM^
} '2B0D|r"a
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堆排序： LAjw!QB
mjJlXA
package org.rut.util.algorithm.support; SEn8t"n
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import org.rut.util.algorithm.SortUtil; pmXWI`s
C3`.-/{D"
/** K`mxb}
* @author treeroot !"qEB2r
* @since 2006-2-2 gM/_:+bT>P
* @version 1.0 BqJrL/(
*/ zqEZ+|c=
public class HeapSort implements SortUtil.Sort{ Boz_*l|
O9 r44ww
/* (non-Javadoc) ?Pf ,5=*B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xuC6EK+
*/ G`<1>%"F
public void sort(int[] data) { gA8u E
MaxHeap h=new MaxHeap(); *h8XbBZH
h.init(data); P6Ol+SI#m
for(int i=0;i h.remove(); Y-9j2.{
System.arraycopy(h.queue,1,data,0,data.length); pF{Ri
} 91'^--N
zCN;LpbEJY
private static class MaxHeap{ NomK(%8m$
,wy:RVv@e
void init(int[] data){ 2Uw}'J_N
this.queue=new int[data.length+1]; . *+7xL
for(int i=0;i queue[++size]=data; bJu,R-f
fixUp(size); TuPxyB
} u(Q(UuI
} _!T$|,a
p5 PON0dS
private int size=0; Z-=7QK.\{
&]A1 _dy
private int[] queue; %x)U8
+mel0ZStS
public int get() { kUBHK"}K
return queue[1]; LA(JA
} G5@@m-
J~ rC
public void remove() { W`rE\P
SortUtil.swap(queue,1,size--); -CNv=vj 3
fixDown(1); W8/6
} Y{B_OoTun
file://fixdown ;5S7_p2]j
private void fixDown(int k) { HCZ%DBU96
int j; ^hTJp{
while ((j = k << 1) <= size) { YXOD fd%L
if (j < size %26amp;%26amp; queue[j] j++; B#lj8I^|
if (queue[k]>queue[j]) file://不用交换 )bJ6{&
break; 0md{e`'q:
SortUtil.swap(queue,j,k); `o-<,
k = j; .jU0Hu{F4
} !,WRXE&j
} AZP>\Dq
private void fixUp(int k) { P =Gb
while (k > 1) { zTzG&B-
int j = k >> 1; Q9 ",
if (queue[j]>queue[k]) ~|jy$*m4A
break; */qc%!YV9
SortUtil.swap(queue,j,k); '4S@:.D`
k = j; JVYYwA^.
} B_1u<00kg
} eJdQ7g[>
X'p%$HsMG
} [aUT #
T7X2$ '
} u01^ABn
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SortUtil： 7q=xW6
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package org.rut.util.algorithm; )W#g@V)>
LxGh *7K-
import org.rut.util.algorithm.support.BubbleSort; B(NL3WJ
import org.rut.util.algorithm.support.HeapSort; }tq9 /\
import org.rut.util.algorithm.support.ImprovedMergeSort; rkXSygb
import org.rut.util.algorithm.support.ImprovedQuickSort; X0L{#U
import org.rut.util.algorithm.support.InsertSort; O
import org.rut.util.algorithm.support.MergeSort; U5s]dUs (
import org.rut.util.algorithm.support.QuickSort; 'GT`%ck
import org.rut.util.algorithm.support.SelectionSort; l$@lk?dc
import org.rut.util.algorithm.support.ShellSort; y$W3\`2q
ZPFTNwf
/** V,,iKr@TG
* @author treeroot p{GDW_
* @since 2006-2-2 ~UFsiVpL
* @version 1.0 kKO]q#9sO
*/ 61 |xv_/
public class SortUtil { ?Cl"jcQ*
public final static int INSERT = 1; D~);:}}>
public final static int BUBBLE = 2; "Vy\-^
public final static int SELECTION = 3; P_%l}%
public final static int SHELL = 4; ~Dh}E9E:
public final static int QUICK = 5; wN.Jyb
public final static int IMPROVED_QUICK = 6; Ee| y[y,
public final static int MERGE = 7; 1z!Lk*C)
public final static int IMPROVED_MERGE = 8; %8}w!2D S
public final static int HEAP = 9; <FLc0s
~)(Dm+vZ
public static void sort(int[] data) { 9a,CiH%@
sort(data, IMPROVED_QUICK); VUhu"h@w%
} 2sq<"TlQXI
private static String[] name={ C*zdHzMj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7qp|Msf},
}; )f|6=x4
< ,n4|z)
private static Sort[] impl=new Sort[]{ WVFy ZpB
new InsertSort(), A}O9e
new BubbleSort(), ]P5u:~U
new SelectionSort(), BGOI
new ShellSort(), YkbLf#2AE|
new QuickSort(), u{^Kyo#v
new ImprovedQuickSort(), $x0F(|wxt
new MergeSort(), W;yZ$k#q}(
new ImprovedMergeSort(), ;B@l0)7(x
new HeapSort() @[lr F7`o
}; 1k(*o.6
m\Nc}P_"p
public static String toString(int algorithm){ =uEhxsj)S
return name[algorithm-1]; ~d]7 Cl
} jeNEC&J
Er`PYE J
public static void sort(int[] data, int algorithm) { Dbd5d]]n3
impl[algorithm-1].sort(data); F*u;'K
} c7 -j
|&.)_+w
public static interface Sort { jiDYPYx;I
public void sort(int[] data); F[Up
} m5*RB1
^%.<(:k[L
public static void swap(int[] data, int i, int j) { \Ld7fP
int temp = data; C7:Ry)8'I
data = data[j]; 0>Nq$/!
data[j] = temp; irS62Xe
} xR3A4m
} )i>KgX