[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; UV>^[/^O
} #&\hgsw/T
int i1=l; tK&.0)*=
int i2=mid+1; Z-m,~Hh
for(int cur=l;cur<=r;cur++){ SM:SxhrGt
if(i1==mid+1) [woR9azC
data[cur]=temp[i2++]; Xq&x<td
else if(i2>r) zE VJ
data[cur]=temp[i1++]; 8uME6]m i
else if(temp[i1] data[cur]=temp[i1++]; @URLFMFi
else lj"L Q(^
data[cur]=temp[i2++]; P=&Je?
} *VT@
} }I7/FqrD
LX.1]T*m`
} 6l#1E#]|
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改进后的归并排序: `+b>@2D_
+j5u[X
package org.rut.util.algorithm.support; &?3?8Q\
EmNB}\IYU
import org.rut.util.algorithm.SortUtil; V|NWJ7
F2yM2Ldx
/** x_Ki5~w5
* @author treeroot =$5[uI2
* @since 2006-2-2 r @~T}<I
* @version 1.0 -"5x? \.{m
*/ o}5:vi]
public class ImprovedMergeSort implements SortUtil.Sort { Yfy6o6*:
$4kc i@.
private static final int THRESHOLD = 10; XKp%7;
1Qf21oN{
/* k>{i_`*
* (non-Javadoc) @1P1n8mH]
* s<qSelj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :o$ R@l
*/ +7<{yP6wU
public void sort(int[] data) { h~elF1dG
int[] temp=new int[data.length]; L{2\NJ"+u
mergeSort(data,temp,0,data.length-1); !?tWWU%P)
} #ITx[X89|
49 3ik
private void mergeSort(int[] data, int[] temp, int l, int r) { SPsq][5eR
int i, j, k; sXTt)J
int mid = (l + r) / 2; HH6b{f@^
if (l == r) }eb%"ZH4|
return; n:he`7.6O
if ((mid - l) >= THRESHOLD) k`js~/Xv
mergeSort(data, temp, l, mid); 0[D5]mcv
else )T#;1qNB
insertSort(data, l, mid - l + 1); ?9X#{p>q
if ((r - mid) > THRESHOLD) 'KQ]7
mergeSort(data, temp, mid + 1, r); W<2%J)N<
else uYL6g:]+ZC
insertSort(data, mid + 1, r - mid); )F? 57eh
P0Na<)\'Y!
for (i = l; i <= mid; i++) { !N,Z3p>Q
temp = data; 5 LX3.
} wRPBJ-C)
for (j = 1; j <= r - mid; j++) { UF<|1;'
temp[r - j + 1] = data[j + mid]; *ILS/`mdav
} ~1Tz[\H#R
int a = temp[l]; T-&CAD3 ,O
int b = temp[r]; ~N[hY1}X[
for (i = l, j = r, k = l; k <= r; k++) { CpS'2@6
if (a < b) { -7ct+3"J
data[k] = temp[i++]; /_,~dt
a = temp; j %TYyL-
} else { ^yK94U;<Gy
data[k] = temp[j--]; q22cp&gmX
b = temp[j]; Hh;w\)/%j
} }(E6:h;}~
} '! 1ts@
} ;~]&$2sk
e%bERds
/** CR934TE+
* @param data w#F+rh3
* @param l |@nvg>mu
* @param i e+y< a~N
*/ 4Bx1L+Cg
private void insertSort(int[] data, int start, int len) { Z(K[oUJx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8fM}UZI
} @hzQk~Gdi
} `4}!+fXQ
} Ynz^M{9)K
} 10#!{].#x
ts;_T..L
堆排序： ";s5It
sQJM 4'8f
package org.rut.util.algorithm.support; c;U\nC<Y
*~!xeL
import org.rut.util.algorithm.SortUtil; +ZRsa`'^
2Fx<QRz
/** 18[f_0@ #
* @author treeroot f=K1ZD
* @since 2006-2-2 X8Sk
* @version 1.0 MruWt*
*/ WKah$l
public class HeapSort implements SortUtil.Sort{ nNhN:?
Z$zUy|s[
/* (non-Javadoc) \)M5o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ysr{1!K
*/ ys#M* {?
public void sort(int[] data) { eaX`S.!jR
MaxHeap h=new MaxHeap(); X3W)c&Pr
h.init(data); h*MR5qa
for(int i=0;i h.remove(); "[[fQpe4@
System.arraycopy(h.queue,1,data,0,data.length); e982IP
} ik$wS#1+L
ZC2C`S\xr
private static class MaxHeap{ 6km u'vw
fykN\b
void init(int[] data){ xZ@Y`2A':
this.queue=new int[data.length+1]; 22BJOh
for(int i=0;i queue[++size]=data; ^7"%eWT`
fixUp(size); raqLXO!j
} 3$Is==>7
} I.8|kscM
0'py7
private int size=0; \^#1~Kx
DGd&x^C
private int[] queue; L//sJe
5ef&Ih.3
public int get() { k oHY AF
return queue[1]; mr('zpkRq
} ^1~/FU
pM46I"
public void remove() { !r LHPg
SortUtil.swap(queue,1,size--); Hzj*X}X#K
fixDown(1); $AXz/fGV
} %x927I>
file://fixdown O]Kb~jkd
private void fixDown(int k) { }TF<C!]
int j; hf?^#=k^
while ((j = k << 1) <= size) { ;! 9_5Ar%
if (j < size %26amp;%26amp; queue[j] j++; `S~u4+y]
if (queue[k]>queue[j]) file://不用交换 3P6'*pZ
break; &R5M&IwL
SortUtil.swap(queue,j,k); 3?O|X+$p
k = j; :?UIyN?
} f%|S>(
} }oN(nPxv9
private void fixUp(int k) { T^nX+;:|
while (k > 1) { +%<Jr<~W
int j = k >> 1; ;9I#>u
if (queue[j]>queue[k]) v PGuEfz
break; K[kmfXKu
SortUtil.swap(queue,j,k); OeAPBhTmFj
k = j; z9+94<J
} D/:)rj14b
} IL\mFjZ'
i&HV8&KygN
} WuNu}Ibl}m
Dw#&x/G
} e{}o:r
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SortUtil： PR'FSTg
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package org.rut.util.algorithm; d#d~t[=
*C:+N>
import org.rut.util.algorithm.support.BubbleSort; L_.}z)S[\
import org.rut.util.algorithm.support.HeapSort; 'pe0Q-
import org.rut.util.algorithm.support.ImprovedMergeSort; R/wSGP`W
import org.rut.util.algorithm.support.ImprovedQuickSort; s{,e^T
import org.rut.util.algorithm.support.InsertSort; /,>.${,;u
import org.rut.util.algorithm.support.MergeSort; X<QE]RZ
import org.rut.util.algorithm.support.QuickSort; J6%op{7/
import org.rut.util.algorithm.support.SelectionSort; ^KaMi_--
import org.rut.util.algorithm.support.ShellSort; Orb(xLChJ
kp6x6%{K\
/** M[{Cy[ta
* @author treeroot 7_3O]e[8
* @since 2006-2-2 *Vc=]Z2G^
* @version 1.0 Tk!b`9
*/ `o3d@Vc
public class SortUtil { FGH>;H@
public final static int INSERT = 1; M/DTD98'N
public final static int BUBBLE = 2; :3t])mL#
public final static int SELECTION = 3; h0eo:Ahi
public final static int SHELL = 4; m2! 7M%]GC
public final static int QUICK = 5; TkBBHg;
public final static int IMPROVED_QUICK = 6; y2U:( H:l!
public final static int MERGE = 7; ?qbp
public final static int IMPROVED_MERGE = 8; ^~aSrREo
public final static int HEAP = 9; |pgkl`
:L[6a>"neE
public static void sort(int[] data) { vjb?N
sort(data, IMPROVED_QUICK); m#ie{u^
} :mrGB3x{
private static String[] name={ /trc&V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A;!FtD/
}; )2$_:Ek
GVM#Xl}w9
private static Sort[] impl=new Sort[]{ 5ZcnZlOOQ
new InsertSort(), 3k<#;(
new BubbleSort(), (=/F=,w
new SelectionSort(), Ueeay^zN
new ShellSort(), x-pMT3m\D#
new QuickSort(), >gZz`CH
new ImprovedQuickSort(), XZInu5(
new MergeSort(), xAjQW=
new ImprovedMergeSort(), 'O`3FI
new HeapSort() )|{{}w~`
}; @5y(>>C}8%
injmP9ed
public static String toString(int algorithm){ nB5[]x'
return name[algorithm-1]; *[H+8/n_
} LU{Z
C6VoOT)\
public static void sort(int[] data, int algorithm) { kpH;D=;
impl[algorithm-1].sort(data); !Ia"pNDf
} j;v%4G
L0kNt &di
public static interface Sort { 'y?|shV{]
public void sort(int[] data); i6d$/yP"
} L:M9|/
J31M:<
public static void swap(int[] data, int i, int j) { >bN~p
int temp = data; nvPE N
data = data[j]; ~vGtNMQg
data[j] = temp; @vYmkF`
} u-{l,p_H
} eeU$uR