[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; L@}PW)#
} >lI7]hbIs
int i1=l; $=aO*i
int i2=mid+1; v2T2/y%
for(int cur=l;cur<=r;cur++){ =ily=j"hK
if(i1==mid+1) X>q`F;W
data[cur]=temp[i2++]; *$f=`sj
else if(i2>r) ys_2?uv
data[cur]=temp[i1++]; h Yu6PWK
else if(temp[i1] data[cur]=temp[i1++]; &|yLTx
else q z)2a2C
data[cur]=temp[i2++]; &2'-v@kK
} M`MxdwR
} sNf& "C!;
Z6!Up1
} }Zhe%M=}G
qi-XNB`b
改进后的归并排序: rxY|&!f
rb*|0ST
package org.rut.util.algorithm.support; j=\h|^gA
-,bFGTvYQ
import org.rut.util.algorithm.SortUtil; nt.LiM/L
H]TdW;ZbZ
/** l|5 h
* @author treeroot 'Zx5+rM${}
* @since 2006-2-2 n1[c\1
* @version 1.0 BN/4O?jD9
*/ j,IRUx13f
public class ImprovedMergeSort implements SortUtil.Sort { XS<>0YM
N?GTfN
private static final int THRESHOLD = 10; 2e48L677-
2TK \pfD
/* 7ZcF0h
* (non-Javadoc) }=R]<`Sj.j
* $l.*;h*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F^!D[:;jK
*/ 2y[Q
public void sort(int[] data) { JK,MK|
int[] temp=new int[data.length]; (d9~z
mergeSort(data,temp,0,data.length-1); `Rq=:6U;3
} ('J/Ww<
^2+Ex+
private void mergeSort(int[] data, int[] temp, int l, int r) { F.s$Y+c!6
int i, j, k; pEyZH!W
int mid = (l + r) / 2; yOM/UdWq
if (l == r) ~ |G&cg
return; h>Kx
if ((mid - l) >= THRESHOLD) !-I,Dh-A
mergeSort(data, temp, l, mid); n ]%2Kx
else 4jT6h9%
insertSort(data, l, mid - l + 1); CEfqFn3^
if ((r - mid) > THRESHOLD) .)E#*kLWR
mergeSort(data, temp, mid + 1, r); #qRoTtMq7
else Bfb~<rs[
insertSort(data, mid + 1, r - mid); cXweg;
pn"!wqg
for (i = l; i <= mid; i++) { LKN7Lkl
temp = data; iUkUo x
} srS!X$cec
for (j = 1; j <= r - mid; j++) { Bwg(f_[1
temp[r - j + 1] = data[j + mid]; >a3m!`lq
} EEe$A?a;
int a = temp[l]; eqtZU\GI>
int b = temp[r]; F`=p/IAJK
for (i = l, j = r, k = l; k <= r; k++) { "O$bq::(]e
if (a < b) { ?<Qbp;WBo
data[k] = temp[i++]; RhYe=Qh4{p
a = temp; Jv~R/qaaD
} else { :s)cTq|3
data[k] = temp[j--]; :8S;34Y;
b = temp[j]; VH7t^fb
} w4 yrAj 2
} Lg4|6.Ez|P
} G1|1Z5r
s,R:D).
/** g{&5a(W&`
* @param data Iv6 lE:)
* @param l |# 0'_
* @param i 0kJ8H!~u
*/ ?mMM{{%(.
private void insertSort(int[] data, int start, int len) { 9qX$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zC50 @S3|
} -TD\?Q
} T;M ;c.U
} bH+NRNI]
} k(H&Af+
fW= N
堆排序： }6Pbjm*
4!sK>l!
package org.rut.util.algorithm.support; @9^OHRZX
#1dVp!?3T
import org.rut.util.algorithm.SortUtil; ]p|?S[!=
9hr7+fW]t
/** qV=:2m10x
* @author treeroot nbxY'`8F
* @since 2006-2-2 L|1,/h 8p
* @version 1.0 j_C"O,WS
*/ V7,dx@J-
public class HeapSort implements SortUtil.Sort{ fz=8"cDR
ByqVNz0L
/* (non-Javadoc) #WjQ'c:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A%#M#hD/
*/ -!!]1\S*Y
public void sort(int[] data) { |GMo"[
MaxHeap h=new MaxHeap(); 97Dq;
h.init(data); 3$hIc)
for(int i=0;i h.remove(); YCRE-5!
System.arraycopy(h.queue,1,data,0,data.length); `E|i8M3g
} $WIE`P%
a&{Y~Og?%
private static class MaxHeap{ K/9Jx(I,qL
75a3hPCZ
void init(int[] data){ *I :c@iCNJ
this.queue=new int[data.length+1]; "U^m~N9k{
for(int i=0;i queue[++size]=data; !aSj1 2J
fixUp(size); et5lfj
} _1[Wv?
} t]I9[5Pq\
)bM,>x
private int size=0; fTXip)n!r
wa<k%_# M
private int[] queue; # fqrZ9:@
)W=O~g
public int get() { m 3UK`~ji
return queue[1]; jyD~ER}J
} Xz@#,F:@
7;+G)44
public void remove() { NCh-BinK@
SortUtil.swap(queue,1,size--); SY|K9$M^
fixDown(1); ]I)ofXu]
} \ Bj{.jL
file://fixdown oeg Bk
private void fixDown(int k) { T1q27I
int j; Xfg3q.q
while ((j = k << 1) <= size) { %16Lo<DPm
if (j < size %26amp;%26amp; queue[j] j++; S3M!"l
if (queue[k]>queue[j]) file://不用交换 bN-!&Td
break; eP"B3Jw
SortUtil.swap(queue,j,k); G_?U?:!AC
k = j; @<eKk.Y?+
} g"748LY>=p
} msxt'-$M
private void fixUp(int k) { =Rx4ZqTI|
while (k > 1) { wH8J?j"5>
int j = k >> 1; M6&=-
if (queue[j]>queue[k]) HL&HY)W1gf
break; |dQz(z&6{5
SortUtil.swap(queue,j,k); y?a71b8m
k = j; ?fH1?Z\'K
} 7LU^Xm8
} 7SS#V
)T"Aji-hy
} C jf<,x$
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} ~qQZhu"
3F]Dh^IR9
SortUtil： O`0r'&n
rX)&U4#[m
package org.rut.util.algorithm; [L X/O@
&V1d"";SZ
import org.rut.util.algorithm.support.BubbleSort; -XXsob}/8
import org.rut.util.algorithm.support.HeapSort; QTBc_Z
import org.rut.util.algorithm.support.ImprovedMergeSort; Soq#cl'll-
import org.rut.util.algorithm.support.ImprovedQuickSort; iXy1{=BDv
import org.rut.util.algorithm.support.InsertSort; \{`^Q+<
import org.rut.util.algorithm.support.MergeSort; S>I` y]qlR
import org.rut.util.algorithm.support.QuickSort; <L8|Wz
import org.rut.util.algorithm.support.SelectionSort; h#Z["BG
import org.rut.util.algorithm.support.ShellSort; joskKik^
wr"0+J7
/** qdI%v#'M
* @author treeroot P}~MO)*1
* @since 2006-2-2 QP.Lq}
* @version 1.0 N$kxf
*/ lXTE#,XVf
public class SortUtil { ^P@:CBO
public final static int INSERT = 1; "x9yb0
public final static int BUBBLE = 2; ;+XrCy!.)L
public final static int SELECTION = 3; nrMW5>&-`
public final static int SHELL = 4; 'y;Kj
public final static int QUICK = 5; 0&sa#g2
public final static int IMPROVED_QUICK = 6; %\ i&g$
public final static int MERGE = 7; V3ozaVk;
public final static int IMPROVED_MERGE = 8; iGSJ\
public final static int HEAP = 9; }},0#Ap
60^j<O
public static void sort(int[] data) { "6\5eFN;
sort(data, IMPROVED_QUICK); :wS&3:h
} $,@}%NlHc
private static String[] name={ is8i_FoD,n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \"(?k>]E
}; xx!8cvD4?
AMjr[!44 @
private static Sort[] impl=new Sort[]{ YA$YT8iMe
new InsertSort(), R?iCJ5m
new BubbleSort(), IWu=z!mO
new SelectionSort(), P4Pc;8T@!
new ShellSort(), g6%]uCFB
new QuickSort(), ,Tr&`2w
new ImprovedQuickSort(), ?d3K:|g
new MergeSort(), xH\\#4/
new ImprovedMergeSort(), :W0p36"
new HeapSort() eZOR{|z
}; $x'jf?zs!
^}Vc||S
public static String toString(int algorithm){ x3cjyu<K
return name[algorithm-1]; Jm<NDE~rw
} ?pZU'5le`
7he,(V
public static void sort(int[] data, int algorithm) { B`e/ /
impl[algorithm-1].sort(data); <VhmtT%7
} t$nJmfzm
R 9`[C
public static interface Sort { B{&W|z{$
public void sort(int[] data); 6:G&x<{
} ij0I!ilG4
8c.>6 Hy
public static void swap(int[] data, int i, int j) { F%-@_IsG#
int temp = data; HNS^:XR
data = data[j]; e2c'Wab
data[j] = temp; QD,m`7(
} ;SU<T^a
} "'[M~Js