[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; q,Nhfo(
} fOUW{s
int i1=l; 2 -C*RHRx
int i2=mid+1; j@o \d%.'!
for(int cur=l;cur<=r;cur++){ kq4ii`zi8
if(i1==mid+1) $bCN;yE
data[cur]=temp[i2++]; K*/X{3J;
else if(i2>r) v'e5j``=
data[cur]=temp[i1++]; qlU"v)Mx
else if(temp[i1] data[cur]=temp[i1++]; m>:zwz< ;
else 2uEvu
data[cur]=temp[i2++]; @ L=dcO{r
} +7V4mF!u
} 2R`dyg
V4CL%i
} + FG Xx
$&ZN%o3
改进后的归并排序: xm*6I
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package org.rut.util.algorithm.support; xgQ&'&7l
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import org.rut.util.algorithm.SortUtil; 1"fbQ^4`
[h0.k"&[
/** gLzQM3{X9
* @author treeroot q(s&2|
* @since 2006-2-2 LDgGVl
* @version 1.0 Q13>z%Rge
*/ uG^RU\(
public class ImprovedMergeSort implements SortUtil.Sort { INF}~DN]
sKniqWi
private static final int THRESHOLD = 10; JBMJR
hhr!FQ.+/
/* -VafN
* (non-Javadoc) n:P++^ j
* ;Ob`B@!=b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OaF[t*]D3
*/ I=c}6
public void sort(int[] data) { W&s@2y?rF
int[] temp=new int[data.length]; N#&/d nV
mergeSort(data,temp,0,data.length-1); py%_XL=w,
} P>wTp)
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private void mergeSort(int[] data, int[] temp, int l, int r) { @w @SOzS)
int i, j, k; )Q5ja}-{V
int mid = (l + r) / 2; zi?G wh~
if (l == r) uD8,E!\
return; E,gpi
if ((mid - l) >= THRESHOLD) _J ZlXY
mergeSort(data, temp, l, mid); #7BX,jvn>
else }~+_|
insertSort(data, l, mid - l + 1); lr~c w#h*
if ((r - mid) > THRESHOLD) cqZuG}VR
mergeSort(data, temp, mid + 1, r); ?5Q_G1H&
else <d] t{M62W
insertSort(data, mid + 1, r - mid); iT,Ya-9"
>,A&(\rO
for (i = l; i <= mid; i++) { /=+Bc=<lZ
temp = data; MzpDvnI9
} Sc,ajT
for (j = 1; j <= r - mid; j++) { ~`!{5:v
temp[r - j + 1] = data[j + mid]; gK",D^6T*Y
} 4)z*Vux
int a = temp[l]; oBI@.&tG}
int b = temp[r]; _d*QA{
for (i = l, j = r, k = l; k <= r; k++) { "H3DmsB
if (a < b) { @z<IsAE
data[k] = temp[i++]; Y:KIaYkk
a = temp; vf/|b6'y
} else { ;Vlt4,s)
data[k] = temp[j--]; 6[S-%|f
b = temp[j]; dW} m44X
} <}n"gk1is
} =DLVWz/<
} WOR H4h9
pGT?=/=*
/** Vohd d_x
* @param data lL6W:Fq@(
* @param l |N%#;7
* @param i CoTe$C7
*/ iVAAGZ>am
private void insertSort(int[] data, int start, int len) { Lf0Wc'9{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :7 OhplI
} qJ%AbdOI8
} !rPU5y*
} <)9dTOdd
} ~xakz BE
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堆排序： C)qy=lx%
3R)_'!R[B
package org.rut.util.algorithm.support; l#^weXSlk
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import org.rut.util.algorithm.SortUtil; _}3NLAqg
`ZZq Sc4
/** P{%R*hb]
* @author treeroot AroYDR,3+
* @since 2006-2-2 ,l7',@6Y
* @version 1.0 L{uQ:;w1
*/ XI7:y4M
public class HeapSort implements SortUtil.Sort{ 5rlZ'>I.
<EM'|IR?
/* (non-Javadoc) JLu>w:\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z[G:
*/ .XPPd?R
public void sort(int[] data) { }Sv\$h
MaxHeap h=new MaxHeap(); H`EsFKw\%
h.init(data); -'~61=PD
for(int i=0;i h.remove(); S?e*<s9k
System.arraycopy(h.queue,1,data,0,data.length); SPo}!&p$~
} =x5k5NIF
.j^=]3
private static class MaxHeap{ J8#3?Lp
xY$@^(Q\
void init(int[] data){ H:!pFj
this.queue=new int[data.length+1]; &7Lg)PG
for(int i=0;i queue[++size]=data; .qg 2zE$0
fixUp(size); +MvO+\/
} .qD=u1{p9
} {<L|Z=&k`
66Bx,]"6
private int size=0; ^Kfm(E
|[/'W7TV%?
private int[] queue; zIy&gOX
QrRnXlEM8
public int get() { Ah Rvyj
return queue[1]; 1y7FvD~v
} s]Qo'q2
<jIuVX
public void remove() { <z R CT
SortUtil.swap(queue,1,size--); }E&48$0h
fixDown(1); NNn sq@?6
} ;Wedj\Kkp
file://fixdown [kL`'yi
private void fixDown(int k) { c);vl%
int j; 9Je+|+s]
while ((j = k << 1) <= size) { h$$2(!G4
if (j < size %26amp;%26amp; queue[j] j++; xa$4P [
if (queue[k]>queue[j]) file://不用交换 N%fDgK
break; RR[1mM
SortUtil.swap(queue,j,k); w'zSV1
k = j; +!eh\.u|]
} :?f^D,w_B
} cs0rz= ZdH
private void fixUp(int k) { 2"8qtG`Et
while (k > 1) { k4`(7Z
int j = k >> 1; v9XevLs
if (queue[j]>queue[k]) cxc-|Xori
break; Bz4;R9_%I
SortUtil.swap(queue,j,k); Y20T$5{#
k = j; Q1[EiM3
} xyyEaB
} UIK4]cYC'
qX:YI3:,@
} QW= X#yrDO
H-jxH,mJmW
} qTI_'q
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SortUtil： Wh^wKF~%
\JBPZ~N3
package org.rut.util.algorithm; !;M5.Y1j&"
Yk=2ld;;
import org.rut.util.algorithm.support.BubbleSort; @f`s%o
import org.rut.util.algorithm.support.HeapSort; H/$oGhvl
import org.rut.util.algorithm.support.ImprovedMergeSort; 8om)A0S
import org.rut.util.algorithm.support.ImprovedQuickSort; sPRo=LB
import org.rut.util.algorithm.support.InsertSort; * \%b1
import org.rut.util.algorithm.support.MergeSort; g [c^7
import org.rut.util.algorithm.support.QuickSort; 5~{s-Ms
import org.rut.util.algorithm.support.SelectionSort; U[M~O*9
import org.rut.util.algorithm.support.ShellSort; /kNSB;
}T&~DVM
/** "HtaJVp//
* @author treeroot i^}ib RQbN
* @since 2006-2-2 y)mtSA8
* @version 1.0 /TY=ig1z
*/ T~)R,OA7m
public class SortUtil { g<^-[w4/
public final static int INSERT = 1; R/jHH{T3
public final static int BUBBLE = 2; SY$%)(c8kL
public final static int SELECTION = 3; HiSNEp$-4$
public final static int SHELL = 4; mO&zE;/[
public final static int QUICK = 5; gb}>xO
public final static int IMPROVED_QUICK = 6; `qhZZ{s)1U
public final static int MERGE = 7; 495A\8#
public final static int IMPROVED_MERGE = 8; +l;AL5h
public final static int HEAP = 9; nHl{'|~
<uvA([r=Vq
public static void sort(int[] data) { %H3 M0J2L
sort(data, IMPROVED_QUICK); Ti$_V_
} pZ5eGA=
private static String[] name={ . H9a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sZI$t L<j
}; k;Ask#rs
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private static Sort[] impl=new Sort[]{ !#dp[,nk
new InsertSort(), ='Yg^:n
new BubbleSort(), G-5ezVli
new SelectionSort(), b=XHE1^rM
new ShellSort(), SHRn$<
new QuickSort(), tf6 Zz[
new ImprovedQuickSort(), );d"gv(]D
new MergeSort(), Wd?=RO`a
new ImprovedMergeSort(), ,D2nUk
new HeapSort() .~fov8
}; tgC)vZ&a
3M5wF6nY[[
public static String toString(int algorithm){ +^ `n- m
return name[algorithm-1]; V z-]H]MW,
} J }|6m9k!
Zx)gLDd
public static void sort(int[] data, int algorithm) { }-~LXL%!3
impl[algorithm-1].sort(data); ="de+S8W
} a([8r- zP
HM &"2c
public static interface Sort { R7/ET"
public void sort(int[] data); i!yE#zew
} 9*2^2GR^;
yZc#@R[0
public static void swap(int[] data, int i, int j) { h6Cqc}P
int temp = data; L u1pxL
data = data[j]; "~L$oji
data[j] = temp; }70A>JBw
} ^J)0i_RS
} d[oHjWk