[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; QsI$4:yl
} +de.!oY
int i1=l; LLaoND6
int i2=mid+1; ,+zLFQC0@
for(int cur=l;cur<=r;cur++){ ZFz>" vt@
if(i1==mid+1) ~w4aA<2Uq
data[cur]=temp[i2++]; 9at7$Nq
else if(i2>r) .+.Y`0
data[cur]=temp[i1++]; N:"E%:wSbi
else if(temp[i1] data[cur]=temp[i1++]; Yx XDRb\kW
else 78}iNGf
data[cur]=temp[i2++]; 7<-D_$SrU
} 3smcCQA%
} RFQa9Rxk
HZfcLDrO
} >q[Elz=dI
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改进后的归并排序: u8-)LOf(
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package org.rut.util.algorithm.support; o?/N4$&5l
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import org.rut.util.algorithm.SortUtil; )h>Cp,|{
!7^fji
/** i"sVk8+o!
* @author treeroot C.pNDpx-
* @since 2006-2-2 <J?i+b
* @version 1.0 G8akMd]2
*/ $\m=-5 0-
public class ImprovedMergeSort implements SortUtil.Sort { Ha4?I$'$
Hdj0! bUx
private static final int THRESHOLD = 10; Hsx`P
Z*s/%4On
/* 1T!_d&A1o
* (non-Javadoc) D[;6xJ
* n'%*vdHKm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o(|`atvK
*/ /$I&D}uR`
public void sort(int[] data) { _%Mu{Ni&
int[] temp=new int[data.length]; %)\Cwl
mergeSort(data,temp,0,data.length-1); }Ct_i'Ow
} p5G O@^i
*A c~
private void mergeSort(int[] data, int[] temp, int l, int r) { nSgg'I(
int i, j, k; *!lq1h
int mid = (l + r) / 2; r`28fC
if (l == r) a] >|2JN<&
return; >N+e c_D^
if ((mid - l) >= THRESHOLD) Y5PIR9-
mergeSort(data, temp, l, mid); zS|%+er~zO
else ]<W1edr
insertSort(data, l, mid - l + 1); *C's7O{O
if ((r - mid) > THRESHOLD) LFV;Y.-(h
mergeSort(data, temp, mid + 1, r); w#XE!8`
else H\^5>ccU>V
insertSort(data, mid + 1, r - mid); C=%go1! $
8m-jU 5u
for (i = l; i <= mid; i++) { tlqDY1
temp = data; od?Q&'A
} AvP*p{we
for (j = 1; j <= r - mid; j++) { 6t/})Xv
temp[r - j + 1] = data[j + mid]; E(]yjZ/
} IO]Oo3
int a = temp[l]; ckN/_ u3
int b = temp[r]; LF*3Iw|v
for (i = l, j = r, k = l; k <= r; k++) { BniFEW:<
if (a < b) { <m UDx n
data[k] = temp[i++]; YN"102CK
a = temp; 2/?pI/W
} else { -aKL 78
data[k] = temp[j--]; G}D?+MWY
b = temp[j]; vAwFPqu
} hiU_r="*ox
} Ldt7?Y(V(
} J6NQ5S\
/=[M
/** )bw>)&)b`
* @param data Fk=_Q LI
* @param l e0>@Yp[Kd
* @param i Me5umA
*/ AVNB)K"
private void insertSort(int[] data, int start, int len) { 2MB\!fh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8q_3*++D
} owYfrf3ZLX
} >Z<ym|(T*
} ,ulNap"R
} &WvJg#f
'#u2q=n4*
堆排序： bis/Nfr]
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package org.rut.util.algorithm.support; E3NYUHfZ
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import org.rut.util.algorithm.SortUtil; [h8F)
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/** _2f}WY3S
* @author treeroot 8a. |CgI#h
* @since 2006-2-2 T7cT4PAW
* @version 1.0 \mWXr*;
*/ S)JZb_
public class HeapSort implements SortUtil.Sort{ jcx/ZR
>`,v?<>+
/* (non-Javadoc) t#Yyo$9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iVXR=A\er
*/ WMh'<'wN_
public void sort(int[] data) { 0Xk;X1Xl
MaxHeap h=new MaxHeap(); >+,1@R
h.init(data); R&PQ[Xc
for(int i=0;i h.remove(); a7#Eyw^H{
System.arraycopy(h.queue,1,data,0,data.length); Hvor{o5|tB
} \ov>?5
_eO+O=j_x
private static class MaxHeap{ |a\s}M1
/:awPYGH<1
void init(int[] data){ #c/v2
this.queue=new int[data.length+1]; \4zvknk<
for(int i=0;i queue[++size]=data; r]0o
fixUp(size); *xL#1
} r\=p.cw<
} y7,~7f!N2
o L6[i'H|
private int size=0; u$<FKp;I
@@ZcW<Y"
private int[] queue; :MJBbrV ,
/ HaS.
public int get() { :p8JO:g9
return queue[1]; hh:)"<[
} WxO*{`T!
] mP-HFl
public void remove() { Q&M(wnl5
SortUtil.swap(queue,1,size--); 1Rp|*>
fixDown(1); 6LvUi|~"<
} y=
file://fixdown `4;<\VYCr
private void fixDown(int k) { jX+LI
int j; BLMcvK\9
while ((j = k << 1) <= size) { BKvF,f/g
if (j < size %26amp;%26amp; queue[j] j++; wJ IJPYTK
if (queue[k]>queue[j]) file://不用交换 ~xvQ?c?-
break; %R&3v%$y*
SortUtil.swap(queue,j,k); ZMx_J
k = j; ?{{E/J:%
} .iew5.eB+
} gfr``z=>O
private void fixUp(int k) { 7zQD.+&L
while (k > 1) { HJg)c;u/2;
int j = k >> 1; Z$WT ~V
if (queue[j]>queue[k]) k"Sw,"e>+
break; #"7:NR^H^
SortUtil.swap(queue,j,k); C: e}}8i
k = j; xn}'!S2-b
} CB?.|)Xam
} BAt2m-
VT'$lB%IK
} D4o?
K=06I
} Y6{p|F?&"
jh8%Xu]t
SortUtil： Eda sGCo
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package org.rut.util.algorithm; % qAhETZ%
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import org.rut.util.algorithm.support.BubbleSort; !+fHdB
import org.rut.util.algorithm.support.HeapSort; eh)J'G]G
import org.rut.util.algorithm.support.ImprovedMergeSort; <w2Nh eM 3
import org.rut.util.algorithm.support.ImprovedQuickSort; |<BTK_R
import org.rut.util.algorithm.support.InsertSort; U*a!Gn7l
import org.rut.util.algorithm.support.MergeSort; ={feN L
import org.rut.util.algorithm.support.QuickSort; k5}i^^.
import org.rut.util.algorithm.support.SelectionSort; dc lJ
import org.rut.util.algorithm.support.ShellSort; #+_OyZ*
vZ|-VvG
/** I;mtyS
* @author treeroot 4] DmgOru%
* @since 2006-2-2 Y{p *$
* @version 1.0 AA05wpu8
*/ \uanQ|Nu
public class SortUtil { F7"Ihb^l
public final static int INSERT = 1; :;??!V
public final static int BUBBLE = 2; >Zmpsa+
public final static int SELECTION = 3; fDbs3"H Q
public final static int SHELL = 4; m+uh6IqN./
public final static int QUICK = 5; F ^E(AE
public final static int IMPROVED_QUICK = 6; u)Y#&qA
public final static int MERGE = 7; 9`09.`U9[
public final static int IMPROVED_MERGE = 8; \t!+]v8f8
public final static int HEAP = 9; 3:=XU9p)x
?58pkg J
public static void sort(int[] data) { CQtd%'rt6
sort(data, IMPROVED_QUICK); 9sT?"(=
} Wa[~)A
private static String[] name={ SXod r}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A#jiCIc
}; $B$=,^)3
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private static Sort[] impl=new Sort[]{ *><] [|Y@H
new InsertSort(), PK+][.6H
new BubbleSort(), 9:=a FP
new SelectionSort(), y>~KeUC
new ShellSort(), /6S/a*`<X
new QuickSort(), n+!.0d}6
new ImprovedQuickSort(), Box,N5AA
new MergeSort(), CZ&TUE|:DA
new ImprovedMergeSort(), XriVHb
new HeapSort() cAktSoF
}; z1V0WDVm
/pyKTZ|
public static String toString(int algorithm){ FAQ:0L$G
return name[algorithm-1]; crhck'?0
} Zn9w1ev
I1}{7-_t
public static void sort(int[] data, int algorithm) { %@BQv4oJ
impl[algorithm-1].sort(data); ]AHi$Xx
} Tzk8y7$[
X2Lhb{ZHE
public static interface Sort { M#|TQa N
public void sort(int[] data); @pG\5Jnf
} \8t g7Sdq
Z;n}*^U
public static void swap(int[] data, int i, int j) { O-&n5
int temp = data; pP".?|n
data = data[j]; `*N0 Lbl]
data[j] = temp; m,.d< **
} '2.F-~
} @Qx;J<{+g