[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; 6$ \69
} h)o5j-M>4
int i1=l; 0%b!ARix
int i2=mid+1; i9O;D*
for(int cur=l;cur<=r;cur++){ tT`{xM
if(i1==mid+1) _]"uq/UWp
data[cur]=temp[i2++]; 7+c}D>/`:
else if(i2>r) k "Qr
data[cur]=temp[i1++]; hVLVMqd
else if(temp[i1] data[cur]=temp[i1++]; 8n~ o="
else L_(Y[!
data[cur]=temp[i2++]; rWS],q=c
} ig}H7U2q@
} yq]/r=e!k
mzH3Q564
} MWHzrqCA
eZ`x[g%1
改进后的归并排序: #_9Jam%M
%&\DCAFk
package org.rut.util.algorithm.support; hG!|ts
yGZsPQIaV
import org.rut.util.algorithm.SortUtil; ps&p|
d:GAa
/** &$<7]a\dM
* @author treeroot JXKo zy41
* @since 2006-2-2 b8~7C4
* @version 1.0 skzTw66W.
*/ 3Jj 3!aDB
public class ImprovedMergeSort implements SortUtil.Sort { ;:4PT~\*
yh{Wuz=T
private static final int THRESHOLD = 10; nZP%Z=p7
US2Tdmy@05
/* &br_opNi
* (non-Javadoc) NU |vtD
* 1 ,e`,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2& ZoG%)
*/ Hr/3nq}.
public void sort(int[] data) { =!P
int[] temp=new int[data.length]; aX,ux9#
mergeSort(data,temp,0,data.length-1); kXY p.IVA
} LAcK%
YM4njkI7
private void mergeSort(int[] data, int[] temp, int l, int r) { ,`.`}'
int i, j, k; }v$T1Cw
int mid = (l + r) / 2; .In8!hjYy4
if (l == r) @$] CC1Y
return; o:nh3K/YJ
if ((mid - l) >= THRESHOLD) YdiXj |k+
mergeSort(data, temp, l, mid); 6,:`esl
else OYwH$5
insertSort(data, l, mid - l + 1); "u.4@^+i
if ((r - mid) > THRESHOLD) QCVwslj,K
mergeSort(data, temp, mid + 1, r); F]k$O$)0
else Tj_~BT
insertSort(data, mid + 1, r - mid); avwhGys#
EWn\]f|
for (i = l; i <= mid; i++) { wML5T+
temp = data; dd|/I1
} lL]8~3b
for (j = 1; j <= r - mid; j++) { 8j%hxAV$
temp[r - j + 1] = data[j + mid]; #M5[TN!
} Ey**j
int a = temp[l]; =sa bJsgL
int b = temp[r]; -YfpfNt
for (i = l, j = r, k = l; k <= r; k++) { 53jtwklA
if (a < b) { q)E J?-
data[k] = temp[i++]; &f$[>yg1-
a = temp; "J(7fL$!
} else { Ow7}&\;^-
data[k] = temp[j--]; 2Y'=~*tV
b = temp[j]; 2O~I.(9(
} M+q|z0U
} l: X]$2;
} "Ca?liy
a}]zwV&
/** DU.nXwl]
* @param data `fUem,$)1F
* @param l A! j4;=}
* @param i KN"V(<!)~
*/ 7 *#pv}Y
private void insertSort(int[] data, int start, int len) { g,seqh%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C)Ez>~Z
} 3"OD"
} QA3q9,C"
} U]h5Q.<SG
} Q<F-l.q
.sk$@Q
堆排序： -{A!zTw1w
nS}XY
package org.rut.util.algorithm.support; (8*& 42W
aykNH>#Po
import org.rut.util.algorithm.SortUtil; k_c8\::p#
BEv>?T 0
/** fy`e)?46
* @author treeroot %kg%ttu7
* @since 2006-2-2 }FTyRHD|
* @version 1.0 <Eo;CaaF/
*/ K8l|qe
public class HeapSort implements SortUtil.Sort{ `<C/-Au
=N9a!ii|
/* (non-Javadoc) mt+IB4`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6J|Y+Y$
*/ 4oF8F)ASj
public void sort(int[] data) { U0+Hk+
MaxHeap h=new MaxHeap(); :(|;J<R%_
h.init(data); (Hcd{]M~
for(int i=0;i h.remove(); W:7oGZ>4
System.arraycopy(h.queue,1,data,0,data.length); hoc$aqP6pp
} ^]$x/1I;
I]]3=?Y
private static class MaxHeap{ WJ9=hr
^+JpI*,
void init(int[] data){ v[_C^;
this.queue=new int[data.length+1]; |8$x
for(int i=0;i queue[++size]=data; D! 1oYr
fixUp(size); T'cahkSw'O
} D-/K'|b
} 3+<}Hm+
&cSTem 0
private int size=0; 0@yHT-Dy
);wSay>%(
private int[] queue; wjF/c
C|"h]
public int get() { ZkW,
return queue[1]; m ?a&XZ
} F#X&Tb{
*v[WJ"8@
public void remove() { jmbwV,@Q2
SortUtil.swap(queue,1,size--); 8I)66
fixDown(1); a a=GW%
} GNzkVy:u
file://fixdown 9pKN^FX,76
private void fixDown(int k) { u=h:d+rq@
int j; gRS}Y8
while ((j = k << 1) <= size) { 6.},y<E
if (j < size %26amp;%26amp; queue[j] j++; bb#F2r4
if (queue[k]>queue[j]) file://不用交换 u%<Je
break; V]cD^Fqp
SortUtil.swap(queue,j,k); 5Xu2MY=
k = j; 84UH& b'n
} IcMfZ{H1
} 66*/"dBwm
private void fixUp(int k) { 5-M EOy(
while (k > 1) { nc#}-}`5
int j = k >> 1; n*6Oa/JG7
if (queue[j]>queue[k]) t@[&8j2B>
break; W3s>+yU
SortUtil.swap(queue,j,k); [R[]&\W
k = j; <(dHh9$~
} TT3GFP
} eXY*l>B
l2"{uCcA
} >NWrT^rk
S>isWte
} ?El8:zt?|
p]/HZS.-b
SortUtil： @:\Iw"P
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package org.rut.util.algorithm; ~0"(C#l9
9P;}P!W
import org.rut.util.algorithm.support.BubbleSort; qjQR0MC
import org.rut.util.algorithm.support.HeapSort; InnjZ>$
import org.rut.util.algorithm.support.ImprovedMergeSort; 64Gd^.Z
import org.rut.util.algorithm.support.ImprovedQuickSort; R57>z`;
import org.rut.util.algorithm.support.InsertSort; x%Ph``XI
import org.rut.util.algorithm.support.MergeSort; DPCB=2E
import org.rut.util.algorithm.support.QuickSort; ~.99H
import org.rut.util.algorithm.support.SelectionSort; oc+TsVt
import org.rut.util.algorithm.support.ShellSort; e P]L
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/** HriY-=ji>a
* @author treeroot \c1u$'|v
* @since 2006-2-2 &)[?D<
* @version 1.0 q1!45a
*/ H9}z0VI
public class SortUtil { XpWcf ([
public final static int INSERT = 1; Y+vG]?D
public final static int BUBBLE = 2; `@%hz%8Y
public final static int SELECTION = 3; LpCJfQ
public final static int SHELL = 4; g\_J
public final static int QUICK = 5; 2d),*Cvf
public final static int IMPROVED_QUICK = 6; !C13E lf
public final static int MERGE = 7; E,u/^V9x
public final static int IMPROVED_MERGE = 8; {k BHZ$/
public final static int HEAP = 9; D d['e
HK_Vk\e
public static void sort(int[] data) { .nDB{@#
sort(data, IMPROVED_QUICK); v@m2c_,
} UnTnc6Bo7W
private static String[] name={ F|mppY'<J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &CP]+ at
}; v\&C]W]
dsJMhB_41U
private static Sort[] impl=new Sort[]{ l9Xz,H
new InsertSort(), B^|^hZZ>
new BubbleSort(), Tvp~~Dk
new SelectionSort(), @fz0-vT,
new ShellSort(), |E]`rfr
new QuickSort(), ;t6)(d4z?
new ImprovedQuickSort(), Sq<ds}o'8l
new MergeSort(), )gNS%tc*K
new ImprovedMergeSort(), 8d|/^U.w~V
new HeapSort() #bIUO2yVo
}; w?eJVi@w{
IOL5p*:gz
public static String toString(int algorithm){ RaT.%:CRm
return name[algorithm-1]; JWB3;,S
} d2\#Zlu<
Nqy)jfyex
public static void sort(int[] data, int algorithm) { 62s0$vw
impl[algorithm-1].sort(data); Nw3K@Ge
} Z'Uc}M'U
i>elK<R4
public static interface Sort { w'i8yl bZ
public void sort(int[] data); :`Sd5b>
} gdj,e ^
yb/v?q?Fk
public static void swap(int[] data, int i, int j) { !3*:6
int temp = data; $bo,m2)
data = data[j]; =|j~*6Hd
data[j] = temp; (Zi,~Wqm$
} m)\wbkC
} 6}/m~m