[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; UuT>qWxQ8
} DcoTa-~
int i1=l; 3Q[]lFJ}F
int i2=mid+1; M O* m@
for(int cur=l;cur<=r;cur++){ s;}';#
if(i1==mid+1) Mim 9C]h(
data[cur]=temp[i2++]; 9{i6g+
else if(i2>r) mMrvr9%
data[cur]=temp[i1++]; 'm}~
else if(temp[i1] data[cur]=temp[i1++]; ]G&?e9OA
else jb)z[!FbM
data[cur]=temp[i2++]; P>L-,R(7e
} 7r"!&P*,
} 9|jIrS%/~
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} EPI mh
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改进后的归并排序: 4,FkA_k
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package org.rut.util.algorithm.support; lZ^XZjwoM
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import org.rut.util.algorithm.SortUtil; [$.oyjd
H|F>BjXn5
/** \R&`bAdk
* @author treeroot 8<)[+@$0
* @since 2006-2-2 k4pvp5}%
* @version 1.0 +ls *04
*/ HJBUN1n
public class ImprovedMergeSort implements SortUtil.Sort { }K"=sE
A &w)@DOe
private static final int THRESHOLD = 10; dSIMwu6u
kp<9o!?)
/* (U!WD`Ym
* (non-Javadoc) E_WiQ?p
* Dr(.|)hv[&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I"sKlMD
*/ )^%,\l-!
public void sort(int[] data) { ]t0?,q.$7
int[] temp=new int[data.length]; N Ja]UZx
mergeSort(data,temp,0,data.length-1); g IX"W;
} sdS<-! %u4
E'[pNU*"x-
private void mergeSort(int[] data, int[] temp, int l, int r) { 28X)s!W'
int i, j, k; }}grJh>tGg
int mid = (l + r) / 2; f(D?g
if (l == r) "793R^Tz
return; 9AB~*;U
if ((mid - l) >= THRESHOLD) SL%4w<
mergeSort(data, temp, l, mid); i-sE\m
else xZ`t~4qR
insertSort(data, l, mid - l + 1); zd#qBj]g
if ((r - mid) > THRESHOLD) 3p!R4f)GN
mergeSort(data, temp, mid + 1, r); _3A$zA
else J[LGa:``
insertSort(data, mid + 1, r - mid); axU!o /m>
aeSy,:
for (i = l; i <= mid; i++) { p4{?Rhb6
temp = data; Z`b,0[rG[
} (jY.S|%
for (j = 1; j <= r - mid; j++) { + 6r@HK`,t
temp[r - j + 1] = data[j + mid]; n{4&('NRFP
} P[XE5puC
int a = temp[l]; tm+}@CM^.
int b = temp[r]; !nuXK
for (i = l, j = r, k = l; k <= r; k++) { %l:%c
if (a < b) { v~uwQ&AH
data[k] = temp[i++]; JEJ]'3
a = temp; !S(jT?'w
} else { j?w7X?1(
data[k] = temp[j--]; D ?,P\cp
b = temp[j]; |r0j>F
} /^/'9}7
} u#J5M&#
} *WMcE$w/D
-fUz$Df/R
/** 0pkU1t~9
* @param data Mqw&%dz'_
* @param l \8Blq5n-O*
* @param i 9=3V}]^M
*/ "]MF =-v
private void insertSort(int[] data, int start, int len) { ;=h^"et
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HLk}E*.mC
} &rw|fF|]
} _Seiwk&
} P7u5Ykc*
} <PV @JJ"
3%<ia$
堆排序： BvX!n"QIb
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package org.rut.util.algorithm.support; zT_{M qY
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import org.rut.util.algorithm.SortUtil; 'Iu$4xo`[
OkzfQ hC}
/** cE]tvL:g
* @author treeroot #exE~@fy-
* @since 2006-2-2 {_(;&\5
* @version 1.0 MIt\[EB
*/ NRoi` IIj
public class HeapSort implements SortUtil.Sort{ {'d?vm!r
deeOtco$LT
/* (non-Javadoc) EO'3;mo,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xZ,g6s2o
*/ A|y&\~<A
public void sort(int[] data) { TC R(
MaxHeap h=new MaxHeap(); H.i_,ZF
h.init(data); ?FMHK\
for(int i=0;i h.remove(); KY|Q#i|pM
System.arraycopy(h.queue,1,data,0,data.length); [xI@)5Xk
} Y/@4|9!
||Lqx#e=
private static class MaxHeap{ y\x!Be;6Z.
$fnFi|-
void init(int[] data){ R )?8A\<E
this.queue=new int[data.length+1]; BT#'<!7!
for(int i=0;i queue[++size]=data; xTAC&OCk^[
fixUp(size); y'4=
} !*pK#
} o"UqI
PkG+`N
private int size=0; S4?ssI
ND21;
private int[] queue; w #1l)+
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public int get() { vV=$N"bT~
return queue[1]; SrHRpxy
} 7Bmt^J5i&t
C'5i>;
public void remove() { :Z=A,G
SortUtil.swap(queue,1,size--); EzG7RjW
fixDown(1); #~p1\['|M
} `+* Mr
file://fixdown vn,L),"=
private void fixDown(int k) { TSuHY0.cp
int j; 'iL['4~.
while ((j = k << 1) <= size) { l|N1u=Z
if (j < size %26amp;%26amp; queue[j] j++; MR+ndB<
if (queue[k]>queue[j]) file://不用交换 })"9TfC
break; }B0V$
SortUtil.swap(queue,j,k); vQIoj31
k = j; *5|\if\
} #Va@4<4r
} mH}AVje{ `
private void fixUp(int k) { @+xkd(RfN
while (k > 1) { WVwNjQ2PM
int j = k >> 1; 0c:CA>F
if (queue[j]>queue[k]) -?e~S\JH
break; roRZE[ya
SortUtil.swap(queue,j,k); }A2@1TTPX
k = j; g7d)YUc
} $>#PhOC
} ^QFjBQ-Hai
t3bDi/m
} YQYN.\
!-2S(8
} ~yO.R)4v
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SortUtil： //6m2a
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package org.rut.util.algorithm; ~'T]B{.+J
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import org.rut.util.algorithm.support.BubbleSort; `9$?g|rB
import org.rut.util.algorithm.support.HeapSort; K<|eZhp~
import org.rut.util.algorithm.support.ImprovedMergeSort; n|^-qy'w
import org.rut.util.algorithm.support.ImprovedQuickSort; YR[Ii?
import org.rut.util.algorithm.support.InsertSort; i-&kUG_X
import org.rut.util.algorithm.support.MergeSort; Ui1K66{
import org.rut.util.algorithm.support.QuickSort; -{P)\5.L
import org.rut.util.algorithm.support.SelectionSort; _G'.VSGH
import org.rut.util.algorithm.support.ShellSort; gk]r:p<O
GH:Au
/** X\YeO>C
* @author treeroot zHu:Ec7
* @since 2006-2-2 ~8|$KD4I
* @version 1.0 ][qZOIk@
*/ Q$RP2&
public class SortUtil { h!)(R<
public final static int INSERT = 1; %7V?7BE
public final static int BUBBLE = 2; jP}N^
public final static int SELECTION = 3; R\X=Vg
public final static int SHELL = 4; Dy8Go4
public final static int QUICK = 5; Z"E+ TX
public final static int IMPROVED_QUICK = 6; mXa1SZnE
public final static int MERGE = 7; du47la 3
public final static int IMPROVED_MERGE = 8; tpCEWdn5
public final static int HEAP = 9; u,'c:RMV
F]YPq
public static void sort(int[] data) { VSP[G ,J.
sort(data, IMPROVED_QUICK); 3-_4p8OK
} kW/ksz0)
private static String[] name={ $]%k <|X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vmmu[v
}; Wje7fv
l sUQ7%f
private static Sort[] impl=new Sort[]{ ^&Qaf:M
new InsertSort(), {O!fV<Vx 9
new BubbleSort(), Cf%)W:Q9
new SelectionSort(), L(X:=) !K0
new ShellSort(), s!UC{)g,
new QuickSort(), X|.X4fs
new ImprovedQuickSort(), /+66y=`UJ
new MergeSort(), /=-E`%R}!
new ImprovedMergeSort(), Q2k\8i
new HeapSort() @c.QrKSaD
}; ,sJ{2,]~
5F0sfX
public static String toString(int algorithm){ (+Er
return name[algorithm-1]; Rhr]ML
} $Y ]*v)}X
qnT:x{o
public static void sort(int[] data, int algorithm) { NP|U |zn
impl[algorithm-1].sort(data); .0s/O
} 9^jO^[>
[c3hwogf:
public static interface Sort { "w|GIjE+
public void sort(int[] data); .>H7i`1D`
} 4$y|z{[< 5
UkeW2l`:
public static void swap(int[] data, int i, int j) { )_f "[m%
int temp = data; wdp4-*
data = data[j]; c.d*DM}W
data[j] = temp; \WZ00Y,*
} Be}Cj(C
} HK ;C*;vC%