[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; 4^W!,@W
} Ku,wI86
int i1=l; dun`/QKV
int i2=mid+1; U*C^g}iA
for(int cur=l;cur<=r;cur++){ J 8%gC
if(i1==mid+1) r/sSkF F
data[cur]=temp[i2++]; 2#.s{Bv
else if(i2>r) %P0
data[cur]=temp[i1++]; 12Oa_6<\0;
else if(temp[i1] data[cur]=temp[i1++]; m%[e_eS
else 1cK'B<5">]
data[cur]=temp[i2++]; XH?//.q
} u}nSdZC
} %/Wk+r9uu
n&:ohOH%
} qk<jvha
bSsg`
改进后的归并排序: ]:gW+6w"C
9w=7A>.U
package org.rut.util.algorithm.support; +7gd1^|$e
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import org.rut.util.algorithm.SortUtil; V;%ug'j
>Q/;0>V
/** V$ H(a`!
* @author treeroot 'SFAJ
* @since 2006-2-2 /i,n75/y?
* @version 1.0 Lu}jk W*
*/ %nZ:)J>kz
public class ImprovedMergeSort implements SortUtil.Sort { c~vhkRA
%hSQ\T<8[o
private static final int THRESHOLD = 10; j,j|'7J%
>aAM&4
/* eNd&47lJ
* (non-Javadoc) Lk !)G'42
* -V}oFxk]q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +aOdaNcI
*/ %LrOGr
public void sort(int[] data) { L?h?LZnq
int[] temp=new int[data.length]; r:bJU1P1$s
mergeSort(data,temp,0,data.length-1); qofAA!3z
} ~X3g_<b_8
g=t`3X#d
private void mergeSort(int[] data, int[] temp, int l, int r) { v'i'I/
int i, j, k; |]9@JdmV
int mid = (l + r) / 2; T01Iu
if (l == r) 5sT3|yq
return; to?!qxn
if ((mid - l) >= THRESHOLD) 1sHjM%
mergeSort(data, temp, l, mid); mXz*Gi
else ]CzK{-W
insertSort(data, l, mid - l + 1); u#Ig!7iUu
if ((r - mid) > THRESHOLD) zr|DC] 3
mergeSort(data, temp, mid + 1, r); I>;{BYPV
else yJI~{VmU7
insertSort(data, mid + 1, r - mid); 3=d%WPgQ
,ucRQ&P
for (i = l; i <= mid; i++) { ^sf,mM~D
temp = data; !5}}mf
} M{L- V
for (j = 1; j <= r - mid; j++) { s`$}xukT
temp[r - j + 1] = data[j + mid]; &3t973=
} H7Q$k4\l
int a = temp[l]; /9pxEidVAS
int b = temp[r]; v.|#^A?Qx
for (i = l, j = r, k = l; k <= r; k++) { 8%K{lg"
if (a < b) { -Rpra0o. C
data[k] = temp[i++]; <[[yV
a = temp; yUnV%@.
} else { 7W)W9=&BT
data[k] = temp[j--]; dx@dnWRT,
b = temp[j]; &G"s!:
} /0/ouA>+
} PZ|I3z
} Eiu/p&ct
N-K/jY
/** r!&174DSR1
* @param data m54>}
* @param l %>&ex0j]
* @param i D"pT?\kO
*/ z6R|1L 1
private void insertSort(int[] data, int start, int len) { p-iFe\+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _{jC?rzb
} Z^>4qf,k
} {IgH0+z
} $eFMn$o
} RB %+|@c
t1w]L
堆排序： +;~N; BT
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package org.rut.util.algorithm.support; (vG*)a
}[akj8U
import org.rut.util.algorithm.SortUtil; #KiJ{w'
W_}j~[&
/** I(*3n"
* @author treeroot I,hw0e
* @since 2006-2-2 K%dQ;C*?
* @version 1.0 ],weqs
*/ a<&K^M&
public class HeapSort implements SortUtil.Sort{ <G}Lc
RvAgv[8
/* (non-Javadoc) 4G,FJjE`p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2 q4p-
*/ 9K@I
public void sort(int[] data) { &\9%;k
MaxHeap h=new MaxHeap(); f- XUto
h.init(data); J]U_A/f
for(int i=0;i h.remove(); <mFDC?j
System.arraycopy(h.queue,1,data,0,data.length); m+!.H\
} J!l/.:`6
<W#G)c0
private static class MaxHeap{ :Dty([
vi}16V84l
void init(int[] data){ Ca'BE#q
this.queue=new int[data.length+1]; 44u)F@)
for(int i=0;i queue[++size]=data; Yk|6?e{+)
fixUp(size); +g g_C'"
} !CU-5bpu
} DU\ytD`u
c0zcR)=mL
private int size=0; (c[u_~ ;
TX=894{nGh
private int[] queue; _p6r5Y
5.\p]>|G1
public int get() { mS'Ad<
return queue[1]; fM ID}S
} zb{79Os[B
A M[f
public void remove() { zd[k|lj
SortUtil.swap(queue,1,size--); C>Hdp_Lm
fixDown(1); 2OJlE) .
} v;\cM/&5
file://fixdown BI?, 3
private void fixDown(int k) { G[ U5R?/
int j; $l*?Ce:
while ((j = k << 1) <= size) { )8C`EPe
if (j < size %26amp;%26amp; queue[j] j++; Da 7(jA+
if (queue[k]>queue[j]) file://不用交换 I$.lFQ%(
break; GKFRZWXdT
SortUtil.swap(queue,j,k); 7K.75%}
k = j; nms[No?
} nod&^%O"
} rNk'W,FU
private void fixUp(int k) { #r#[&b
while (k > 1) { ]jD\4\M}
int j = k >> 1; /O:4u_
if (queue[j]>queue[k]) @ ;!IPiU
break; R%szN.cI
SortUtil.swap(queue,j,k); oYN"L
k = j; _\4#I(
} :2KHiT5
} =H)]HxEEM
d'96$e o~
} /''=V.-N
f!kZyD7
} )l`Ks
+A?P4}
SortUtil： Bug.>ln1
G{[w+ObX
package org.rut.util.algorithm; k( Sda>-
e#/&A5#Ya
import org.rut.util.algorithm.support.BubbleSort; QwX81*nx
import org.rut.util.algorithm.support.HeapSort; Zy+ERaF|]
import org.rut.util.algorithm.support.ImprovedMergeSort; EK4%4<"
import org.rut.util.algorithm.support.ImprovedQuickSort; 8vuTF*{yZ
import org.rut.util.algorithm.support.InsertSort; o6A$)m5V
import org.rut.util.algorithm.support.MergeSort; hM]Z T5;<
import org.rut.util.algorithm.support.QuickSort; H/{@eaV
import org.rut.util.algorithm.support.SelectionSort; y^ skE{
import org.rut.util.algorithm.support.ShellSort; t[TM\j0jW
iQ" LIeD
/** 3g4=as4w
* @author treeroot fJr EDj4(
* @since 2006-2-2 Cdz?+hb
* @version 1.0 0 8)f
*/ \H .Cmm^I
public class SortUtil { `"65 _?B i
public final static int INSERT = 1; ^"7-`<J
public final static int BUBBLE = 2; 8p 4[:M@
public final static int SELECTION = 3; 1*p6UR&
public final static int SHELL = 4; %JBLp xnq
public final static int QUICK = 5; ta{24{?M\
public final static int IMPROVED_QUICK = 6; eOb--@~8
public final static int MERGE = 7; rY(7IX
public final static int IMPROVED_MERGE = 8; ~T;:Tg*
public final static int HEAP = 9; KD A8x W
M ]047W
public static void sort(int[] data) { Y#c439&
sort(data, IMPROVED_QUICK); MtL<)?HQ
} %j^QK>%
private static String[] name={ @K!JE w\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =u}~\ 'd
}; +A8q.-N G
.T7CMkYt
private static Sort[] impl=new Sort[]{ zd%f5L('
new InsertSort(), iYBc4'X
new BubbleSort(), c/+6M
new SelectionSort(), )yyH_Ax2
new ShellSort(), [lML^CYQ
new QuickSort(), ZY,$oFdsi
new ImprovedQuickSort(), 'l(s)Oa{M:
new MergeSort(), zI[<uvxzW`
new ImprovedMergeSort(), /lR*ab
new HeapSort() 8a*&,W
}; 1av#u:jy~>
JL4E`
public static String toString(int algorithm){ SLEOcOAmD
return name[algorithm-1]; Evj%$7H1L1
} SAq.W"ri
8TpYt)]S
public static void sort(int[] data, int algorithm) { ((`\i=-o5
impl[algorithm-1].sort(data); )&T 5/+
} FDgo6x
t#(=$
public static interface Sort { |kh{EUE ;
public void sort(int[] data); >N al\
} _yAY5TIv
T/ECW
public static void swap(int[] data, int i, int j) { HTQTDbhV^
int temp = data; FiMM-c|
data = data[j]; }IWt\a<d
data[j] = temp; Yr{hJGw[
} E+i(p+=4
} 8SRUqe[H]