[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; ZVit]3hd
} x@:98P
int i1=l; kV3LFPf>0
int i2=mid+1; ?}EWfsA
for(int cur=l;cur<=r;cur++){ `M-
if(i1==mid+1) X7gB.=\X
data[cur]=temp[i2++]; |:u5R%
else if(i2>r) ISTAJ8" D
data[cur]=temp[i1++]; % 3fpIzm
else if(temp[i1] data[cur]=temp[i1++]; n"Jj'8k
else !"aGo1$$
data[cur]=temp[i2++]; 0BAZWm
} oeI[x
} *$/Go8t4u
f/Z-dM\e
} {nS(B
E;"VI2F
改进后的归并排序: A.YK=_J
1k"i"kRM
package org.rut.util.algorithm.support; ?Qts2kae#
.dvs&+I
import org.rut.util.algorithm.SortUtil; '%YTMN@
.I>CL4_
/** x/0x&la
* @author treeroot b0tbS[j
* @since 2006-2-2 psS^
* @version 1.0 .RS
*/ LOgB_$9_3
public class ImprovedMergeSort implements SortUtil.Sort { ]]5(:>l
jASK!3pY
private static final int THRESHOLD = 10; #X6=`Xe#
vv
/* z,VXH ?.Zo
* (non-Javadoc) Yt r*"-
* `2xt%kC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XD[9wd5w8
*/ c|4_nT 2
public void sort(int[] data) { =E~_F>SD
int[] temp=new int[data.length]; 9AD0|,g
mergeSort(data,temp,0,data.length-1); aQso<oK
} f_:>36{1^!
J,=^'K(
private void mergeSort(int[] data, int[] temp, int l, int r) { 5+)_d%v=6!
int i, j, k; za8+=?
int mid = (l + r) / 2; YT@H^=
if (l == r) 0BOL0<Wq
return; [c99m:*+
if ((mid - l) >= THRESHOLD) %Wc$S]>i
mergeSort(data, temp, l, mid); LC0-O1
else -1R7 8(1
insertSort(data, l, mid - l + 1); mUiJ@
if ((r - mid) > THRESHOLD) r&XxF>
mergeSort(data, temp, mid + 1, r); X0KUnxw
else zXd#kw;
insertSort(data, mid + 1, r - mid); 5%DHF-W)
nYK!'x$
for (i = l; i <= mid; i++) { =e6!U5 f
temp = data; <*p
} 14y>~~3C4
for (j = 1; j <= r - mid; j++) { V("T9g
temp[r - j + 1] = data[j + mid]; t1aKq)?
} &2W`dEv]?
int a = temp[l]; W#9LK Jj
int b = temp[r]; NV`7VYU
for (i = l, j = r, k = l; k <= r; k++) { r\} O{ZO
if (a < b) { cP0(Q+i7
data[k] = temp[i++]; EFs\zWF
a = temp; k:1|Z+CJ
} else { xf{=~j/L
data[k] = temp[j--]; K*"Fpx{M
b = temp[j]; Vb~;"WABo
} 3d_g@x#9
} 1sfs!b&E
} ~@iYP/=/Q
kwFo*1 {
/** Km0P)Z
* @param data d,t'e?
* @param l T{ /\q 5
* @param i PMiG:bM
*/ o(xt%'L`t
private void insertSort(int[] data, int start, int len) { ;B"S*wYMN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4rNuAK`2
} BCr*GtR)W
} 1ka58_^
} mmEe@-lE
} vLM-v
cA+O]",}
堆排序： ?w@KF%D
d^XRkB:h
package org.rut.util.algorithm.support; Fi#b0S
kn6X I*
import org.rut.util.algorithm.SortUtil; \J{%xW>
{s[,CUL0
/** Je~<2EsQ
* @author treeroot +/8KN
* @since 2006-2-2 PvS\
* @version 1.0 &$_#{?dPt
*/ `~ R%}ID
public class HeapSort implements SortUtil.Sort{ Iy{&T#e"
<:`x> _
/* (non-Javadoc) #^<Rx{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `z`"0;,7S
*/ }m-+EUEo9
public void sort(int[] data) { |",/
MaxHeap h=new MaxHeap(); ILXVyU
h.init(data); 3 e<sNU?
for(int i=0;i h.remove(); :8Jn?E (36
System.arraycopy(h.queue,1,data,0,data.length); KEvT."t
} 0p ZX_L'
+8q]O%B
private static class MaxHeap{ MIWI0bnf
8w4cqr4m
void init(int[] data){ P/hIJV[
this.queue=new int[data.length+1]; o_ SR
for(int i=0;i queue[++size]=data; x-ShY&k
fixUp(size); Q::6|B,G
} a$'=a09
} {afR?3GK
CZ_ (IT7
private int size=0; bcZ s+FOPd
[#6Eax,j
private int[] queue; Z,m;eCLG]
gdyP,zMD7
public int get() { ,Q8)r0c
return queue[1]; !&OybjQ
} Y;WHjW(K
3xGk@ 333
public void remove() { Wo+'j $k
SortUtil.swap(queue,1,size--); :3Hr:~
fixDown(1); X(ZouyD<
} 7'9~Kx&+
file://fixdown F2$Z4%x#
private void fixDown(int k) { U[UjL)U
int j; {`vv-[j|
while ((j = k << 1) <= size) { -hIDL'5u-I
if (j < size %26amp;%26amp; queue[j] j++; SMdQ,n1]
if (queue[k]>queue[j]) file://不用交换 #(G#O1+
break; U`fxe`nVa
SortUtil.swap(queue,j,k); { f@k2^
k = j; lIj2w;$v
} n/fMq,<8
} I?mU_^no
private void fixUp(int k) { ,#PeK(
while (k > 1) { |tU4(hC
int j = k >> 1; 3tlA!e
if (queue[j]>queue[k]) 7Bhi72&6
break; >1=sw qa
SortUtil.swap(queue,j,k); D20n'>ddg
k = j; {$ghf"
} ?=;dNS@i@
} |-c)OS3#D
420cJ{;A
} 6R+m;'
):lq}6J#
} ` qqUuFMM
\y9( b
SortUtil： SqhG\qE{Qj
(bk~,n_
package org.rut.util.algorithm; d!%:Ok
W^Jh'^E
import org.rut.util.algorithm.support.BubbleSort; )kSE5|:pi
import org.rut.util.algorithm.support.HeapSort; I-Ya#s#m
import org.rut.util.algorithm.support.ImprovedMergeSort; 8Ilg[Drj*
import org.rut.util.algorithm.support.ImprovedQuickSort; h4 s!VK1X
import org.rut.util.algorithm.support.InsertSort; n 4:Yc@,
import org.rut.util.algorithm.support.MergeSort; P7;=rSW
import org.rut.util.algorithm.support.QuickSort; {U&*8Q(/
import org.rut.util.algorithm.support.SelectionSort; =Zcbfo_&
import org.rut.util.algorithm.support.ShellSort; Pd@y+|
x>^r%<WbX
/** |.x |BJ
* @author treeroot 0^Vc,\P?
* @since 2006-2-2 vt3yCS
* @version 1.0 n"'1.
*/ }>\+eG
public class SortUtil { |RBgJkS;8
public final static int INSERT = 1; 6_a42#
public final static int BUBBLE = 2; U[1Ir92:
public final static int SELECTION = 3; LY%`O#i.
public final static int SHELL = 4; >W= 0N(
public final static int QUICK = 5; /h=:heS4$
public final static int IMPROVED_QUICK = 6; @3/.W+
public final static int MERGE = 7; P%8zxU;
public final static int IMPROVED_MERGE = 8; E4^zW_|xE
public final static int HEAP = 9; R&13P&:g
fdIk{o
public static void sort(int[] data) { 5gV%jQgkC
sort(data, IMPROVED_QUICK); 0s"g%gq|
} $F!)S
private static String[] name={ 2YD;Gb[8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }VlX!/42
}; ~l~ai>/
\Lxsg!wtJ
private static Sort[] impl=new Sort[]{ D}1Z TX_
new InsertSort(), Ij_Y+Mnl4:
new BubbleSort(), >E&mNp
new SelectionSort(), 6mr5`5~w
new ShellSort(), \K+LKa)
new QuickSort(), i?uJ<BdU[
new ImprovedQuickSort(), Z}(,OZh
new MergeSort(), 3+gp_7L
new ImprovedMergeSort(), n22k<@y
new HeapSort() SqL8MKN)
}; -I7"9}j3
q(0V#kKC
public static String toString(int algorithm){ ">QNiR!
return name[algorithm-1]; fS50
} d(RSn|[0
K4]c
public static void sort(int[] data, int algorithm) { k23*F0Dv
impl[algorithm-1].sort(data); 0*S2_&Q)
} +@),Fk_
e;:~@cB,c
public static interface Sort { .,t"iC:E
public void sort(int[] data); N5u.V\F!z\
} Zi47)8
;W6P$@'zs
public static void swap(int[] data, int i, int j) { x/Pi#Xm
int temp = data; ~C6Qp`VF
data = data[j]; gz6BfHQG
data[j] = temp; hC@oyC(4
} HMbF#!E
} Mq!03q6