[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; 2FGCf} ,
} ]-l4
int i1=l; 2~hQ
int i2=mid+1; s:I 8~Cc
for(int cur=l;cur<=r;cur++){ JC}T*h>Ee
if(i1==mid+1) y8]vl;88yY
data[cur]=temp[i2++]; CS0q#?
else if(i2>r) jJ?G7Q5l
data[cur]=temp[i1++]; m`jGBSlw_
else if(temp[i1] data[cur]=temp[i1++]; Se(apQH
else &+GbklUB~
data[cur]=temp[i2++]; Z1wfy\9c8
} :)Da^V
} Me^L%%:@
:^]FpUY
} ^b*ub(5Ot
am/D$ (l1
改进后的归并排序: xFyBF[c
eGo$F2C6E
package org.rut.util.algorithm.support; HN<e)E38
?yA 2N;
import org.rut.util.algorithm.SortUtil; N<QLvZh
x(rl|o
/** uNpa2{S'
* @author treeroot d!"gb,ec
* @since 2006-2-2 mOb@w/f
* @version 1.0 s+v$sF
*/ }RQ'aeVl(
public class ImprovedMergeSort implements SortUtil.Sort { ?:W=ddg
d%oHcn
private static final int THRESHOLD = 10; (>dL
uFaT~ 4
/* 2gnz=
* (non-Javadoc) Vb?_RE_H
* lNvxt6@s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B*fBb.Z
*/ wL&[Vi_j{
public void sort(int[] data) { :BblH0'
int[] temp=new int[data.length]; fg GTm:
mergeSort(data,temp,0,data.length-1); )XYCr<s2"
} /1r{z1pv\
H)K.2Q
private void mergeSort(int[] data, int[] temp, int l, int r) { oB+@05m8
int i, j, k; ]Yf8
int mid = (l + r) / 2; pH0MVu(W
if (l == r) v&`n}lS
return; E,[v%Xw
if ((mid - l) >= THRESHOLD) s$/Z+"f(
mergeSort(data, temp, l, mid); TH+TcYqO
else CDDEWVd
insertSort(data, l, mid - l + 1); hxGo~<. :
if ((r - mid) > THRESHOLD) H#QPcp@
mergeSort(data, temp, mid + 1, r); GGFrV8
else P}-S[[b73s
insertSort(data, mid + 1, r - mid); :Y)G-:S+
3;Tsjv}
for (i = l; i <= mid; i++) { UDb
temp = data; PH!rWR
} wT:mfS09N
for (j = 1; j <= r - mid; j++) { yI's=Iu`
temp[r - j + 1] = data[j + mid]; l+?sR<e?!
} 6Q`7>l.|?
int a = temp[l]; 9A}nZ1Y
int b = temp[r]; kFi=^#J{
for (i = l, j = r, k = l; k <= r; k++) { 8+~'T|
if (a < b) { ['I5(M@
data[k] = temp[i++]; G)%r|meKGB
a = temp; "=0JYh)%_
} else { --TY[b
data[k] = temp[j--]; J#G\7'?{
b = temp[j]; x%RE3J-
} ;zi4W1
} 7] 17?s]t,
} WQHlf0]
vFK(Dx
/** SuA`F|7?P
* @param data 1(4IcIR5T;
* @param l N'8}5Kx5
* @param i ))uki*UNK
*/ 8FBXdk?A
private void insertSort(int[] data, int start, int len) { wQX%*GbL2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0f,Ii_k bT
} <:~'s]`zf
} d'p@[1/
} *)i+c{~
} HE3x0H}o>
BR0P :h
堆排序： w5mSoKb
RaB%N$.9s
package org.rut.util.algorithm.support; M\=/i\-
S&~;l/
import org.rut.util.algorithm.SortUtil; @|9V]bk
7XiR)jYo*
/** Tc;j)_C)
* @author treeroot ffh3okyW0
* @since 2006-2-2 2tdr1+U?g
* @version 1.0 AO0aOX8_+D
*/ tR-rW)0K3Q
public class HeapSort implements SortUtil.Sort{ =bb)B(
Fx@@.O6
/* (non-Javadoc) .4,l0Nn`W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3d>xg%?
*/ }U$p[Gi<
public void sort(int[] data) { (s!cd]Qa.
MaxHeap h=new MaxHeap(); )}T0SGY
h.init(data); 19^B610
for(int i=0;i h.remove(); *AI?md
System.arraycopy(h.queue,1,data,0,data.length); s#V:! 7
} YnX6U1/^
I#](mRJ6
private static class MaxHeap{ gz`P~7-w:
WJw %[_W
void init(int[] data){ Rs1JCP=d8
this.queue=new int[data.length+1]; "\x\P)j0>
for(int i=0;i queue[++size]=data; ?1/wl;=fm
fixUp(size); j*@EJ"Gm>
} /Wm3qlv
} 4(}V$#^+
aZYs?b>Gm
private int size=0; mX QVL.P\
iCZ1ARi
private int[] queue; W8s/"
h%(0|
public int get() { Ih5F\eM
return queue[1]; c^BeT;
} X5Ff2@."y|
^[-3qi
public void remove() { \d"M&-O
SortUtil.swap(queue,1,size--); [}=/?(5
fixDown(1); rTLo6wI
} isV9nWo$
file://fixdown 1M/_:UH`
private void fixDown(int k) { /*) =o+
int j; hS:j$je
while ((j = k << 1) <= size) { $61*Xf+*
if (j < size %26amp;%26amp; queue[j] j++; >-<7 r?~
if (queue[k]>queue[j]) file://不用交换 9_\1cSk'
break; >&2n\HR\
SortUtil.swap(queue,j,k); /,#&Htk
k = j; :TN^}RML
} p+d?k"WN?
} k6W [//
private void fixUp(int k) { ys$X!Ep
while (k > 1) { <bxp/#6D
int j = k >> 1; \l9S5%L9
if (queue[j]>queue[k]) CGN:=D<
break; Dh{sVRA
SortUtil.swap(queue,j,k); b0"R |d[i
k = j; ?*)wQZt;
} 6?(vXPpT$
} \Dn an5H/
8t Ef>
} G9i?yd4n=B
{`CmE/`{
} &nEQ`3~F
by%k*y
SortUtil： Cz1o@rt
%O_Ed {G4t
package org.rut.util.algorithm; N8w@8|KM
w0N8a%
import org.rut.util.algorithm.support.BubbleSort; ISl-W1u}
import org.rut.util.algorithm.support.HeapSort; 7BDoF!kCx
import org.rut.util.algorithm.support.ImprovedMergeSort; */yR_f
import org.rut.util.algorithm.support.ImprovedQuickSort; 4w-P%-4
import org.rut.util.algorithm.support.InsertSort; b(.,Ex]
import org.rut.util.algorithm.support.MergeSort; QnNddCiu=
import org.rut.util.algorithm.support.QuickSort; p6e9mSs
import org.rut.util.algorithm.support.SelectionSort; U:o(%dk
import org.rut.util.algorithm.support.ShellSort; BSib/)p
0"to]=
/** &lYe
* @author treeroot *wetPt)~v_
* @since 2006-2-2 xnm!$ $W
* @version 1.0 G.#sX
*/ \@i4im@%xU
public class SortUtil { dF/HKBJ
public final static int INSERT = 1; 4Sxt<7[f
public final static int BUBBLE = 2; woCFkO;'O
public final static int SELECTION = 3; />\6_kT
public final static int SHELL = 4; K<Qy1y~[
public final static int QUICK = 5; >*aqYNft
public final static int IMPROVED_QUICK = 6; 9F^rXY.
public final static int MERGE = 7; UjI-<|
public final static int IMPROVED_MERGE = 8; 17{$D,P
public final static int HEAP = 9; 4(FEfde=
jvfQG:F }
public static void sort(int[] data) { 96$qH{]Ap
sort(data, IMPROVED_QUICK); #+,O
} m=uW:~
private static String[] name={ rF8nz:8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t*'U|K4L/
}; Ei[>%Ah
8bIwRVA2\
private static Sort[] impl=new Sort[]{ +P. }<
new InsertSort(), R|h(SXa
new BubbleSort(), BE]PM nI
new SelectionSort(), wkwsBi
new ShellSort(), #^ cmh
new QuickSort(), &^4E)F
new ImprovedQuickSort(), +P?^Yx0d
new MergeSort(), CnA0^JX
new ImprovedMergeSort(), AT%@T|
new HeapSort() ] oh.w
}; xfyUT^
?QXc,*=N
public static String toString(int algorithm){ x.OCE`
return name[algorithm-1]; t$W~X~//
} R%Y#vUmBV{
;.<0lnV
public static void sort(int[] data, int algorithm) { ucVn `
impl[algorithm-1].sort(data); _(Qec?[^Ps
} m"CsJ'\ors
4pfv?!Oj
public static interface Sort { aA5rvP+
public void sort(int[] data); 09psqXU@I
} }L1-2
\-?@ &' :
public static void swap(int[] data, int i, int j) { 7sci&!.2`
int temp = data; ,`ZIW
data = data[j]; +bbhm0f
data[j] = temp; i!jR>+
} lrXi*u]
} UFoxv)