[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; =803rNe
} vCP[7KhGj
int i1=l; X\`']\l
int i2=mid+1; L2>e@p\>
for(int cur=l;cur<=r;cur++){ |Y K,&
if(i1==mid+1) Cn/WNCzst&
data[cur]=temp[i2++]; %T]$kF++&
else if(i2>r) u"&?u+1j
data[cur]=temp[i1++]; hEHd$tH06
else if(temp[i1] data[cur]=temp[i1++]; pl).U#7`
else H^|TV]^;N
data[cur]=temp[i2++]; ^i|R6oO_5
} %W~w\mT
} nYSe0w
:.5l
} *k7BE_&*0Z
kqCsEtm]
改进后的归并排序: -gvfz&Lz
:|n[zjK/S
package org.rut.util.algorithm.support; {.2\}7.c
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import org.rut.util.algorithm.SortUtil; '4uu@?!dVk
b*Y Wd3
/** @Fc:9a@
* @author treeroot .=;IdLO,Bf
* @since 2006-2-2 %>$<s<y
* @version 1.0 bB?E(>N;
*/ U>lf-iI2B
public class ImprovedMergeSort implements SortUtil.Sort { 8)>x)T
(T*$4KGV
private static final int THRESHOLD = 10; OK]QDb
6C2~0b
/* jMn,N9Mf
* (non-Javadoc) yMWh#[phH
* e' M&Eh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Imv#7{ndq
*/ N" L&Z4Z
public void sort(int[] data) { l$&~(YE f
int[] temp=new int[data.length]; 4`i8m
mergeSort(data,temp,0,data.length-1); )I&.6l!#
} n725hY6}<l
p=:Vpg<!
private void mergeSort(int[] data, int[] temp, int l, int r) { ZGZNZ}~#
int i, j, k; n1PptR
int mid = (l + r) / 2; e%cTFwX?n
if (l == r) 94-BcN
return; +4-T_m/W/
if ((mid - l) >= THRESHOLD) U,P>P+\@
mergeSort(data, temp, l, mid); 4fsd5#
else 'yPKQ/y$x
insertSort(data, l, mid - l + 1); l(NQk> w
if ((r - mid) > THRESHOLD) AY5iTbL1
mergeSort(data, temp, mid + 1, r); ai-s9r'MI?
else 7}VqXUwabx
insertSort(data, mid + 1, r - mid); :m<&Ff}
J- S.m(
for (i = l; i <= mid; i++) { 1<G+KC[F
temp = data; x.-d)]a!
} ?Ujg.xo\
for (j = 1; j <= r - mid; j++) { gl+d0<Rzw
temp[r - j + 1] = data[j + mid]; ZjmQ
} d 5yEgc;z
int a = temp[l]; mxqD'^n#
int b = temp[r]; Mm$\j*f/
for (i = l, j = r, k = l; k <= r; k++) { (|BY<Ac3
if (a < b) { E<\$3G-do
data[k] = temp[i++]; bqED5;d'#
a = temp; nx'c=gp
} else { O=3/qs6m
data[k] = temp[j--]; ~bZ=]i
b = temp[j]; 0cycnOd
} m}'_Poc
} g$s;;V/8e
} ZHK>0>;
;Xt<\^e
/** %[$HX'Y
* @param data ~gpxK{
* @param l Kd-1EU
* @param i )bFl-
*/ yus3GqPI
private void insertSort(int[] data, int start, int len) { N; }$!sNIm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZwDL
} lfj5?y
} OL 0YjU@
} fF)Q;~_VA
} 8vVE
q2X::Yqk
堆排序： AfA"QCyO
1@v<
package org.rut.util.algorithm.support; <}J!_$A
a|FkU%sjzZ
import org.rut.util.algorithm.SortUtil; 5e+j51
!ekByD
/** 6axxyh%
* @author treeroot \!\:p/f
* @since 2006-2-2 0 SSdp<
* @version 1.0 b11I$b #
*/ -LiGO#U
public class HeapSort implements SortUtil.Sort{ Jb"FY:/Qv+
R@K\
/* (non-Javadoc) D<J'\mo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8lV:-"+5
*/ |E >h*Y
public void sort(int[] data) { K+`GVmD
MaxHeap h=new MaxHeap(); NTt4sWP!I
h.init(data); ipn-HUrE@
for(int i=0;i h.remove(); aLh(8;$
System.arraycopy(h.queue,1,data,0,data.length); sYS 8]JU
} #p(c{L!
t,9+G<)>H
private static class MaxHeap{ 2V@5:tf
Y_Gd_+oJ
void init(int[] data){ =v<w29P(g
this.queue=new int[data.length+1]; YcA. Bn|as
for(int i=0;i queue[++size]=data; jOV6%
fixUp(size); sa8O<Ab
} */e$S[5
} "0!h-bQN
Ve(<s
private int size=0; dCoP qKy
9Rk(q4.OP
private int[] queue; dT0W8oL
sLA.bp.O
public int get() { 4<($ZN8
return queue[1]; +S{m!j%B
} zls^JTE
[]A9j?_w
public void remove() { ]ltCJq
SortUtil.swap(queue,1,size--); :=hL}(~]
fixDown(1); Yd3lL:M
} "zq'nV=
file://fixdown )3CM9P'0
private void fixDown(int k) { 5&8BO1V.
int j; J920A^)j!
while ((j = k << 1) <= size) { 0HWSdf|w
if (j < size %26amp;%26amp; queue[j] j++; KF'fg R
if (queue[k]>queue[j]) file://不用交换 c$ /.Xp
break; / <(|4e
SortUtil.swap(queue,j,k); ~3bV~H#~m
k = j; {Z/iYHv~#c
} J6CSu7Voa
} 0hoMf=bb$
private void fixUp(int k) { c6F?#@?
while (k > 1) { p-"C^=l
int j = k >> 1; sR/Yv
if (queue[j]>queue[k]) +~V_^-JG&
break; <ci(5M
SortUtil.swap(queue,j,k); #+o$Tg
k = j; JAHg_!
} o*204BGB
} MX]#|hEeQ
i]<@
} Oey Ph9^V
<zqIq9}r
} (.$$U3\
jlb8<xIC]
SortUtil： M;XU"8
#fF5O2E'3
package org.rut.util.algorithm; R>"pJbS;L
J?{sTj"KB
import org.rut.util.algorithm.support.BubbleSort; j?C[ids<
import org.rut.util.algorithm.support.HeapSort; %S^ke`MhF
import org.rut.util.algorithm.support.ImprovedMergeSort; imADjBR]
import org.rut.util.algorithm.support.ImprovedQuickSort; N=u( 3So
import org.rut.util.algorithm.support.InsertSort; I0l3"5X a
import org.rut.util.algorithm.support.MergeSort; ;L:UYhDbUx
import org.rut.util.algorithm.support.QuickSort; 9=}#.W3.
import org.rut.util.algorithm.support.SelectionSort; \ 3E%6L
import org.rut.util.algorithm.support.ShellSort; |d&Kr0QIV
n=b!c@f4
/** ?6*\M
* @author treeroot J,v024TM
* @since 2006-2-2 y=9fuGL6
* @version 1.0 rui 8x4c
*/ T=w0T-[f
public class SortUtil { W/RB|TMT
public final static int INSERT = 1; 9/8+R%
public final static int BUBBLE = 2; -ik$<>{X
public final static int SELECTION = 3; E @r &K
public final static int SHELL = 4; s-6$C
public final static int QUICK = 5; L7lpOy4k
public final static int IMPROVED_QUICK = 6; M`7lYw\Or!
public final static int MERGE = 7; @ebY_*
public final static int IMPROVED_MERGE = 8; N\s-{7K
public final static int HEAP = 9; k3LHLJZ#
YO.ddy*59
public static void sort(int[] data) { 0{d)f1
sort(data, IMPROVED_QUICK); &9gI?b8
} KY2z)#/
private static String[] name={ cC9Zc#aK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LTx,oa:ma
}; \*5z0A9)5)
S^1ZsD.
private static Sort[] impl=new Sort[]{ k0FAI0~(
new InsertSort(), E}zGY2Xx
new BubbleSort(), ]/p>p3@1C
new SelectionSort(), EFU)0IAL[
new ShellSort(), !`H!!Kg0L
new QuickSort(), c;KMox/
new ImprovedQuickSort(), ,WsG,Q(K
new MergeSort(), guCCu2OTA%
new ImprovedMergeSort(), OGH,K'l
new HeapSort() '4GN%xi
}; BC#`S&R
:V6t5I'_
public static String toString(int algorithm){ ?;w`hA3ei
return name[algorithm-1]; ,y0 &E8Z
} kxrYA|x
SPe%9J+
public static void sort(int[] data, int algorithm) { cAx$W6S
impl[algorithm-1].sort(data); ,ZYPffu<*
} }]1C=~lC
`)8SIx
public static interface Sort { |BtFT
public void sort(int[] data); jc32s}/H
} +u |SX/C
lP4s"8E`h
public static void swap(int[] data, int i, int j) { a$iDn_{
int temp = data; s,mt%^x[
data = data[j]; /ZL6gRRA|
data[j] = temp; non5e)w3@
} lQgavP W!
} 2.{zfr