[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; Op90NZI#K
} );!dg\U
int i1=l; `^zQ$au'u
int i2=mid+1; FTbtAlqh<
for(int cur=l;cur<=r;cur++){ 4]]b1^vVj
if(i1==mid+1) jP7w6sk E
data[cur]=temp[i2++]; wM0E%6 P
else if(i2>r) =nw0# '
data[cur]=temp[i1++]; u X>PefR
else if(temp[i1] data[cur]=temp[i1++]; Q~b_dx{m
else boIVU`F-!
data[cur]=temp[i2++]; d _uFY:
} g*28L[Q~
} }`#Bf
t+J)dr
} zG<0CZQ8
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改进后的归并排序: a 1NCVZ
C?S~L5a#oC
package org.rut.util.algorithm.support; u,\xok"
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import org.rut.util.algorithm.SortUtil; RpjSTV8Tkm
o:4CI
/** Z+Xc1W^
* @author treeroot OK.-]()!
* @since 2006-2-2 }d@LSaM
* @version 1.0 T6;>O`B.r
*/ P$Axc/H
public class ImprovedMergeSort implements SortUtil.Sort { FJW`$5?
-h=c=P
private static final int THRESHOLD = 10; ?f9$OLEB
s 8Jj6V
/* y6bjJ}
* (non-Javadoc) Ty.drM
* }\U0[x#q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5qeT4| Ol
*/ pL%4= ]m
public void sort(int[] data) { }0vtc[!
int[] temp=new int[data.length]; wqf&i^_
mergeSort(data,temp,0,data.length-1); tG_-;03<`4
} WVinP(#nfM
roL}lM$
private void mergeSort(int[] data, int[] temp, int l, int r) { I51M}b,[d
int i, j, k; FU'^n6[<B
int mid = (l + r) / 2; q;KshpfRMD
if (l == r) ^fG`DjA)
return; vrQFx~ZztH
if ((mid - l) >= THRESHOLD) [l`^fnKt
mergeSort(data, temp, l, mid); Qf"6PJ
else s!NisF
insertSort(data, l, mid - l + 1); JtThkh'-"
if ((r - mid) > THRESHOLD) cj`#Tg.
mergeSort(data, temp, mid + 1, r); ,b.kw}k
else < rv1IJ
insertSort(data, mid + 1, r - mid); j\nE8WH
Pb*q;9
for (i = l; i <= mid; i++) { s8{-c^G:R
temp = data; on6<l
} p_A5C?&
for (j = 1; j <= r - mid; j++) { N"&$b_u[
temp[r - j + 1] = data[j + mid]; ZWov_
} ^Kb9@lz/
int a = temp[l]; _T_PX$B
int b = temp[r]; )H.ubM1
for (i = l, j = r, k = l; k <= r; k++) { EUJ1RhajF
if (a < b) { kbD*=d}3{
data[k] = temp[i++]; &Jrq5Q C
a = temp; >t2]Ssi(
} else { {6-;P#Q0_
data[k] = temp[j--]; |+>%o.M&i
b = temp[j]; nl.~^CP
} S$Ns8=
} 9@kcK
} C#ZmgR
;L#LDk{Za
/** zojuH8
* @param data |2WxcW]U.%
* @param l Q9Q!9B@
* @param i Z3LQl(
*/ c1gz#,
private void insertSort(int[] data, int start, int len) { YK(XS"Kl
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0F-mROC=F
} ]JkpRaP$
} 07~pf}
} !pG+Ak?
} *2w_oKE'+5
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堆排序： &C CHxjsKR
41P4?"O
package org.rut.util.algorithm.support; i=,B88ko
~ra#UG\Y8
import org.rut.util.algorithm.SortUtil; 6RR4L^(m
4`?sE*P@`
/** 6GvhEulYR
* @author treeroot fRZUY<t
* @since 2006-2-2 \VoB=Ac&
* @version 1.0 cq+nWHqF{J
*/ PR48~K,?
public class HeapSort implements SortUtil.Sort{ CnM+HN30o
n0Qh9*h
/* (non-Javadoc) # |[`1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~}hba3&b;#
*/ ~{52JeUcP
public void sort(int[] data) { !gD 3CA
MaxHeap h=new MaxHeap(); '8]|E
h.init(data); &!H~bzg
for(int i=0;i h.remove(); 2@"0}po#
System.arraycopy(h.queue,1,data,0,data.length); ux"D ]P
} yfRUTG
03i?"MvNo
private static class MaxHeap{ 6Cop#kW#
1]a*Oer}
void init(int[] data){ _OyP>|L'
this.queue=new int[data.length+1]; +9=@E
for(int i=0;i queue[++size]=data; nR=2eBNf
fixUp(size); B}l}Aq8
} S,d ngb{
} E.5*Jr=J
!#cKF6%
private int size=0; <lg"M;&Ht
luP'JUq
private int[] queue; )]0[`iLe
]4LT#
public int get() { tH<9
return queue[1]; ovo?lE-a0
} H4,.H,PZ
A?6{
public void remove() { / h2*$
SortUtil.swap(queue,1,size--); 2@=cqD7x
fixDown(1); <;TP@-a
} Zu [?'
file://fixdown b.w(x*a
private void fixDown(int k) { '&_y*"/c
int j; Up1$xLSl
while ((j = k << 1) <= size) { c(_oK ?
if (j < size %26amp;%26amp; queue[j] j++; os"[Iji
if (queue[k]>queue[j]) file://不用交换 ?%8})^Dd>4
break; TnMVHO-
SortUtil.swap(queue,j,k); >8F{lbEe
k = j; E980yXJR
} 7DC0W|Fe
} 2>_brz|7:|
private void fixUp(int k) { IlC:dA
while (k > 1) { 32)&;
int j = k >> 1; \$$b",2 h
if (queue[j]>queue[k]) F$sF 'cw
break; LB64W ;#h
SortUtil.swap(queue,j,k); W?4&lC^G
k = j; / %U~lr
} TQbFI;\
} `o^;fcnG
2yCd:wg
} T9XW%/n
J1u@A$4l?
} /v|68x6
ba:mO$
SortUtil： H(DVVHx
hK9t}NE.O
package org.rut.util.algorithm; J?qcRg`1E
5@r_<J<>
import org.rut.util.algorithm.support.BubbleSort; hVt+%tmNy
import org.rut.util.algorithm.support.HeapSort; edImrm1f
import org.rut.util.algorithm.support.ImprovedMergeSort; 99+/W*C
import org.rut.util.algorithm.support.ImprovedQuickSort; R;Gl{
import org.rut.util.algorithm.support.InsertSort; X-;Qorb^
import org.rut.util.algorithm.support.MergeSort; |=h)efo}
import org.rut.util.algorithm.support.QuickSort; c5mhl;+'
import org.rut.util.algorithm.support.SelectionSort; M~g~LhsF
import org.rut.util.algorithm.support.ShellSort; dWq/)%@t
)W}/k$S
/** ]B-$p p
* @author treeroot .$ P2W0G
* @since 2006-2-2 Mh-*5Rx
* @version 1.0 `)( <g
*/ 9-Nq[i"
public class SortUtil { ,P; a/{U
public final static int INSERT = 1; [/fwt!
public final static int BUBBLE = 2; {pQ@0b
public final static int SELECTION = 3; ,N@Icl
public final static int SHELL = 4; v[3hnLN%
public final static int QUICK = 5; e$xv[9
public final static int IMPROVED_QUICK = 6; 0z'={6,
public final static int MERGE = 7; wEHrer
public final static int IMPROVED_MERGE = 8; 6GrMcI@hS
public final static int HEAP = 9; }:c,SO!
7&;jje[ <g
public static void sort(int[] data) { gQ@Pw4bA
sort(data, IMPROVED_QUICK); 65`'Upu
} .KwuhmR
private static String[] name={ a@a1TpLQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %\zCOfN
}; ~"<VUJ=Ly:
p?`|CE@h7
private static Sort[] impl=new Sort[]{ +<9q]V
new InsertSort(), $=QGua V
new BubbleSort(), lj SR?:\
new SelectionSort(), ,h(f\h(9
new ShellSort(), JXy667_
new QuickSort(), /K<GN7vN
new ImprovedQuickSort(), gkq RO19
new MergeSort(), Xw}Y!;<IEu
new ImprovedMergeSort(), OSh mrz28
new HeapSort() 5, "^"*@<
}; -z~ V
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public static String toString(int algorithm){ tx&U"]
return name[algorithm-1]; `S~@FX
} j}?ZsnqV
.X=M!
public static void sort(int[] data, int algorithm) { E.Q} \E
impl[algorithm-1].sort(data); Z :i"|;
} .Zo9^0`C
~C*6V{Tj
public static interface Sort { a ~iEps
public void sort(int[] data); 'N5r2JL[w
} t=pkYq5t8
'/qe#S
public static void swap(int[] data, int i, int j) { U%PMV?L{
int temp = data; mX_Uhpw?t
data = data[j]; ~9/nx|%D
data[j] = temp; t-|=weNy
} n)?F 9Wap
} o? xR[N-J