[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; ,u2<()`8D
} @7'gr>_E
int i1=l; [?*^&[
int i2=mid+1; mJ7kOQ-.$
for(int cur=l;cur<=r;cur++){ c= uORt>
if(i1==mid+1) mH .I!
data[cur]=temp[i2++]; +8I0.,'
else if(i2>r) a!]%@A6p
data[cur]=temp[i1++]; 7yl'!uz)9
else if(temp[i1] data[cur]=temp[i1++]; 0fU>L^P_?
else blv6
data[cur]=temp[i2++]; a@J:*W
} 5GkM7Zu!{j
} Z5A<TC/:
w2[R&hJ
} .`XA6e(8KR
Lp=B? H
改进后的归并排序: DYK|"@
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package org.rut.util.algorithm.support; (tN$G:+")F
UxtZBNn8
import org.rut.util.algorithm.SortUtil; m=V2xoMw6
[y>.)BU
/** K%Bi8d
* @author treeroot XZGyhX7
* @since 2006-2-2 {o`5&EoM
* @version 1.0 'QU ?O[CH
*/ a\E]ueVD2j
public class ImprovedMergeSort implements SortUtil.Sort { _Ar,]v
H#E0S>Jw|
private static final int THRESHOLD = 10; Nl _Jp:8s
P_g
/* |0-L08DW
* (non-Javadoc) * =l9gv&
* + aFjtb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ppjrm
*/ nv]64mL3
public void sort(int[] data) { 1S:H!h3
int[] temp=new int[data.length]; :9Pqy pd+
mergeSort(data,temp,0,data.length-1); yK^k*)2N
} [f}1wZ*
v( B4Bz2
private void mergeSort(int[] data, int[] temp, int l, int r) { o++Hdvai
int i, j, k; C7PiuL?
int mid = (l + r) / 2; C2v7(
if (l == r) XjbK!.
return; 6"(&lK\^
if ((mid - l) >= THRESHOLD) ~@;7}Aag
mergeSort(data, temp, l, mid); +6*I9R
else t {}1f
insertSort(data, l, mid - l + 1); N}=-+E|
if ((r - mid) > THRESHOLD) { L5m`-x
mergeSort(data, temp, mid + 1, r); ~-/AKaK}
else m/AN*`V
insertSort(data, mid + 1, r - mid); O{V"'o
qDW/8b\^
for (i = l; i <= mid; i++) { edQ><lz
temp = data; jG#sVK]
} iVcBD0 q)
for (j = 1; j <= r - mid; j++) { X1"nq]chGy
temp[r - j + 1] = data[j + mid]; zqkmsFH{
} 1Rh&04O>VL
int a = temp[l]; tJP(eaqZ
int b = temp[r]; y(A"g3^=
for (i = l, j = r, k = l; k <= r; k++) { bOdD:=f
if (a < b) { %O${EN
data[k] = temp[i++]; mVLGQlvVK
a = temp; BJ5#!I%h
} else { #z.x3D@^r6
data[k] = temp[j--]; 5{> cfN\q
b = temp[j]; m[f\I^\%8
} %y q}4[S+o
} xjpW<-)MLf
} 53QP~[F8R]
:`K;0`C+
/** DH%X+r
* @param data J98K:SAR
* @param l ?0x;L/d])
* @param i OZ6%AUot
*/ z$NLFJvy_-
private void insertSort(int[] data, int start, int len) { tj3p71%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BG"6jQh
} EA\~m*k
} 79v&6Io
} K5$ y
} !FO)||'[
sIpK@BQ'
堆排序： 3A5" %
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package org.rut.util.algorithm.support; C6`8dn
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import org.rut.util.algorithm.SortUtil; "Xqj%\
-Da_#_F
/** Sv ,_G'
* @author treeroot *sTQ9 Kr
* @since 2006-2-2 $f+9svq
* @version 1.0 bpzA ' g>
*/ gS%J`X$
public class HeapSort implements SortUtil.Sort{ }73H$ss:
;3!TOY"j;e
/* (non-Javadoc) {f)p|)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) seq$]
*/ FD<~?-
public void sort(int[] data) { 1gC=xMAT
MaxHeap h=new MaxHeap(); b+3pu\w`
h.init(data); ~VOmMw4HV
for(int i=0;i h.remove(); G4i&:0
System.arraycopy(h.queue,1,data,0,data.length); 4{Iz\:G:{/
} .XmD[=
:X^B1z3X4
private static class MaxHeap{ tua+R_"
Ii)TCSt9U?
void init(int[] data){ 7;XdTx
this.queue=new int[data.length+1]; _AFgx8
for(int i=0;i queue[++size]=data; 7Q`4*H6
fixUp(size); wcO+P7g
} AXyuXB
} SG~R!kN}Q
fKfi
private int size=0; =<g\B?s]
C}!|K0t?
private int[] queue; [8"nRlXH
WIg"m[aIs
public int get() { NS1[-ng
return queue[1]; ,MLPVDN*D
} G~JQcJFj
TzOf&cs/r
public void remove() { tFGLqR%/
SortUtil.swap(queue,1,size--); 'g#))y
fixDown(1); b7$?'neH/.
} CB~&!MdMr
file://fixdown Bpgl U=Qr
private void fixDown(int k) { ,YoIn
int j; Gqs8$[o
while ((j = k << 1) <= size) { SbB5J> >7J
if (j < size %26amp;%26amp; queue[j] j++; Z'EZPuZ!'
if (queue[k]>queue[j]) file://不用交换 rg`"m
break; R\<^A~(Gl
SortUtil.swap(queue,j,k); k: {$M yK
k = j; ''Hq-Ng
} 6ul34\;
} pY2nv/
private void fixUp(int k) { MG~^>
while (k > 1) { I{E10;
int j = k >> 1; y]Y)?])
if (queue[j]>queue[k]) W?$ ImW
break; y]/{W}D
SortUtil.swap(queue,j,k); ]`MRH[{
k = j; { "/@,!9rJ
} ;{>z\6N
} Nk7Q
P"- ,^?6
} X\h]N
?0%lB=qQ
} 39OZZaWL
Bp}<H<@
SortUtil： "8-]6p3u
43/|[
package org.rut.util.algorithm; x>t:&Y M
Y A;S'dxY
import org.rut.util.algorithm.support.BubbleSort; ;a68>5Lm*
import org.rut.util.algorithm.support.HeapSort; W4Eo1 E
import org.rut.util.algorithm.support.ImprovedMergeSort; 'Ct+0X:D
import org.rut.util.algorithm.support.ImprovedQuickSort; k\EMO\je
import org.rut.util.algorithm.support.InsertSort; ?J>^X-z
import org.rut.util.algorithm.support.MergeSort; 40Du*5M
import org.rut.util.algorithm.support.QuickSort; ?-(E$ll
import org.rut.util.algorithm.support.SelectionSort; T-27E$0
import org.rut.util.algorithm.support.ShellSort; }g3)z%Xe'[
{&/q\UQ
/** 4b4nFRnH
* @author treeroot D3I;5m`_
* @since 2006-2-2 <uA|nYpp
* @version 1.0 Z!#zr@'k
*/ d/;oNC+
public class SortUtil { 7Npz {C{I
public final static int INSERT = 1; 39u!j|VH
public final static int BUBBLE = 2; utQ_!3u
public final static int SELECTION = 3; s,0,w--=
public final static int SHELL = 4; e'u9 SpJ
public final static int QUICK = 5; TIS}'c'C
public final static int IMPROVED_QUICK = 6; w{0UA6+
public final static int MERGE = 7; ;VvqKyUh7`
public final static int IMPROVED_MERGE = 8; #j@Su )+
public final static int HEAP = 9; /9[nogP
eX}uZR
public static void sort(int[] data) { VDscZt)y8
sort(data, IMPROVED_QUICK); C[~b6UP
} E9|i:
private static String[] name={ h8nJ$jg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?+51 B-
}; YncY_Hu
bj7v<G|Y
private static Sort[] impl=new Sort[]{ k{9s>l~'
new InsertSort(), 5HmX-+XpK
new BubbleSort(), wWwY.}j
new SelectionSort(), KaOS!e'
new ShellSort(), HmQuRW
new QuickSort(), w2Pkw'a{
new ImprovedQuickSort(), -[ F<u
new MergeSort(), N>VA`+aFR
new ImprovedMergeSort(), n-p|7N
new HeapSort() Cgt{5
}; Dtelr=/s
Nk]r2^.z[
public static String toString(int algorithm){ [t,7H
return name[algorithm-1]; l^&#fz
} V7 c7(G
z )k\p'0"
public static void sort(int[] data, int algorithm) { MA"DP7e?v
impl[algorithm-1].sort(data); M7En%sBp
} 7Sr7a{
w${=]h*2
public static interface Sort { Cvq2UNz(R
public void sort(int[] data); "M2HiV
} AOeptv^k3}
3<?#*z4]_
public static void swap(int[] data, int i, int j) { M,:GMO:?a
int temp = data; kyz_r6
data = data[j]; 5^[V%4y>
data[j] = temp; WG<D+P
} *YYm;J'
} 8L.Y0_x