[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; j@v*q\X&
} IaH8#3+a
int i1=l; C&,&~^_F
int i2=mid+1; #!OCEiT_
for(int cur=l;cur<=r;cur++){ KFdV_e5lU
if(i1==mid+1) nyi}~sB
data[cur]=temp[i2++]; Av^{$9yl
else if(i2>r) 3p"VmO
data[cur]=temp[i1++]; h$DFp
else if(temp[i1] data[cur]=temp[i1++]; OlK3xdg7
else ~+A?!f;-J
data[cur]=temp[i2++]; 2Auhv!xV
} gtyo~f
} I(#Y\>DG
Z2(z,pK
} pB&3JmgR$)
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改进后的归并排序: _:Tjq)
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package org.rut.util.algorithm.support; BZ">N
@R_a'v-
import org.rut.util.algorithm.SortUtil; 4v33{sp
wxkCmrV
/** nk>
* @author treeroot 3DV';
* @since 2006-2-2 .|JJyjRA+
* @version 1.0 v98=#k!F
*/ Mhm3u
public class ImprovedMergeSort implements SortUtil.Sort { }\:3}'S.$
xKWqDt
private static final int THRESHOLD = 10; 1Zx|SBF
HlqCL1\<
/* \-0@9E<D
* (non-Javadoc) `L`qR,R
* Ah;2\0|t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^G[xQcM73
*/ -X'HZ\)
public void sort(int[] data) { bvuoGG*
int[] temp=new int[data.length]; gYA|JFi
mergeSort(data,temp,0,data.length-1); &8_]omuNV
} ]iRE^o6
|Up+Kc:z/n
private void mergeSort(int[] data, int[] temp, int l, int r) { 7"2L|fG
int i, j, k; 8B JxD<
int mid = (l + r) / 2; J_C<Erx[O
if (l == r) (8TB*BhQ_
return; NKvBNf|D
if ((mid - l) >= THRESHOLD) =${]j
mergeSort(data, temp, l, mid); h$)(-_c3
else ah1d0eP
insertSort(data, l, mid - l + 1); }=z_3JfO
if ((r - mid) > THRESHOLD) 'C8VD+p
mergeSort(data, temp, mid + 1, r); "=@b>d6U+
else n.ZLR=P4
insertSort(data, mid + 1, r - mid); 8>x!n/z)
'3 w=D )
for (i = l; i <= mid; i++) { "^F#oo%L
temp = data; NeAkJG=<
} j2c -01}
for (j = 1; j <= r - mid; j++) { S_/9eI~X
temp[r - j + 1] = data[j + mid]; <`i"5`J
} 15+>W4v
int a = temp[l]; |!E>I
int b = temp[r]; dqnH7okZ
for (i = l, j = r, k = l; k <= r; k++) { y >r7(qg
if (a < b) { z}.y ?#
data[k] = temp[i++]; lqn7$
a = temp; Umjt~K^Z
} else { 0vuL(W8)
data[k] = temp[j--]; RbzSQr>a\
b = temp[j]; /:3:Ky3
} 0?KXQD
} -G e5gQ=
} rZ2X$FO@
b6:A-jb*I
/** PElC0qCn[
* @param data <cNXe4(
* @param l P?p>'avP
* @param i 'bJ!~ML&
*/ _*7h1[,{f
private void insertSort(int[] data, int start, int len) { rl4B(NZi}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7zXFQ|TP
} v#0F1a?]D
} 8^\}\@
} {STOWuY
} h6<abT@I
.) uUpY%K^
堆排序： B4yU}v
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package org.rut.util.algorithm.support; |x@)%QeC
PtCO';9[
import org.rut.util.algorithm.SortUtil; NAjY,)>'K
G6(kwv4
/** Rt:k4Q
* @author treeroot Yv k Qh{
* @since 2006-2-2 [zv>Wlf,%
* @version 1.0 !l|vO(
*/ 2_M+akqy^
public class HeapSort implements SortUtil.Sort{ rqW[B/a{
Ls{z5*<FM
/* (non-Javadoc) b&[9m\AX`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aSdh5?
*/ HeABU(o4
public void sort(int[] data) { !>fYD8Ft,
MaxHeap h=new MaxHeap(); yTzP{I
h.init(data); LOQoi8j
for(int i=0;i h.remove(); c.-h'1
System.arraycopy(h.queue,1,data,0,data.length); A}WRpsA9
} _a1 =?
WA}<Zme3[
private static class MaxHeap{ OzY55
FdEzt
void init(int[] data){ mkgGX|k;
this.queue=new int[data.length+1]; 6hDK;J J&
for(int i=0;i queue[++size]=data; b?9c\-}
fixUp(size); o#3?")>|
} y_EkW f
} uw!
JwCv(1$GM
private int size=0; u$ [R>l9
+13h*
private int[] queue; MJNY#v3
:K.%^ag=j
public int get() { R}Pw#*B
return queue[1]; zvjVM"=G
} 0q'd }DW
L[l?}\
public void remove() { rMXIw
SortUtil.swap(queue,1,size--); ,:g.B\'Q
fixDown(1); $$ %4,\{l
} y_O[r1MF
file://fixdown 5tPBTS<<"L
private void fixDown(int k) { K$OxeJP?F
int j; -c-af%xD
while ((j = k << 1) <= size) { .K`OEdr<
if (j < size %26amp;%26amp; queue[j] j++; wKF #8Y
if (queue[k]>queue[j]) file://不用交换 - s[=$pDU
break; Gr9/@U+
SortUtil.swap(queue,j,k); vSty.:bY\p
k = j; X"WKgC g$
} T=r-6eN
} r=GF*i[3
private void fixUp(int k) { q/y4HT,x
while (k > 1) { MuNM)pyxp
int j = k >> 1; #qkokV6`
if (queue[j]>queue[k]) ZeewGa^r
break; A4LGF
SortUtil.swap(queue,j,k); Z$qFjWp
k = j; 3t<XbHF9
} U'^AJ2L8
} +5J"G/f
'J^ M`/
} bwh7.lDAl
kN3T/96
} tP; &$y.8
)|;*[S4
SortUtil： yMdEH-?/
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package org.rut.util.algorithm; zNSix!F
iVq4&X_x
import org.rut.util.algorithm.support.BubbleSort; WrK!]17or
import org.rut.util.algorithm.support.HeapSort; rZRcy9$y>
import org.rut.util.algorithm.support.ImprovedMergeSort; eXJt9olI
import org.rut.util.algorithm.support.ImprovedQuickSort; >!+.M9
import org.rut.util.algorithm.support.InsertSort; xlPUum-o
import org.rut.util.algorithm.support.MergeSort; TDI8L\rr
import org.rut.util.algorithm.support.QuickSort; wMy$T<:
import org.rut.util.algorithm.support.SelectionSort; 6#~"~WfPQ
import org.rut.util.algorithm.support.ShellSort; &`>[4D*
#Mo`l/Cwp
/** n8(B%KF
* @author treeroot p7(Pymkd
* @since 2006-2-2 '\%c"?
* @version 1.0 V:F;Nq%+j
*/ w0QN5?
public class SortUtil { wX}N===
public final static int INSERT = 1; ;\`~M
public final static int BUBBLE = 2; Enee\!@v
public final static int SELECTION = 3; ~;St,Fw<<
public final static int SHELL = 4; +EJwWDJ!%
public final static int QUICK = 5; #PnuR2s7.
public final static int IMPROVED_QUICK = 6; S,T?(lSl
public final static int MERGE = 7; }* iag\
public final static int IMPROVED_MERGE = 8; ?wE@9g A
public final static int HEAP = 9; Zu(eYH=Q
8@%Xd^
public static void sort(int[] data) { j,Sg?&"%=
sort(data, IMPROVED_QUICK); [c4.E"
} :V2"<]
private static String[] name={ `-zdjc d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *]2LN$
}; $>E\3npV
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private static Sort[] impl=new Sort[]{ qGMM3a)Q
new InsertSort(), ';`fMcN
new BubbleSort(), Ke-Q>sm2Q
new SelectionSort(), M0!;{1
new ShellSort(), +3.Ik,Z}zq
new QuickSort(), N[4v6GS
new ImprovedQuickSort(), }HS:3Dt
new MergeSort(), ?]gZg[
new ImprovedMergeSort(), @C)O[&Sk
new HeapSort() lhg3 }dW
}; Li ,B,
E_&Hje|J_[
public static String toString(int algorithm){ ".L+gn}u-
return name[algorithm-1]; 9fD4xkRS
} )/k0*:OMyO
0z?b5D;
public static void sort(int[] data, int algorithm) { QFoZv+|
impl[algorithm-1].sort(data); n<MMO=+bg
} XfA3Ez,}
zM6yUEg
public static interface Sort { 3_=~7B) 8
public void sort(int[] data); CCKg,v
} WtI1h`Fo
H3{x;{.b
public static void swap(int[] data, int i, int j) { :QgC Zq
int temp = data; Mq) n=M
data = data[j]; R_h(Z{d
data[j] = temp; E [JXQ76
} m1_?xU
} N_<sCRd]9