[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; btuG%D{a^
} Bib<ySCre
int i1=l; mcV<)UA}
int i2=mid+1; m`-);y
for(int cur=l;cur<=r;cur++){ eLSzGbKf
if(i1==mid+1) Ma|4nLC}
data[cur]=temp[i2++]; !:|*!
else if(i2>r) JJd qdX;
data[cur]=temp[i1++]; RRt(%Wm*
else if(temp[i1] data[cur]=temp[i1++]; \Osu1]Jn>
else WiytHuUF
data[cur]=temp[i2++]; PT2;%=f
} ?$6H',u
} T#Z&*
@GN2v,WA?
} 0SL{J*S4[#
PyQ.B*JJ
改进后的归并排序: S[F06.(1
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package org.rut.util.algorithm.support; +]%S}<R
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import org.rut.util.algorithm.SortUtil; |Mq+QDTTw~
b)I-do+
/** 5*$yY-A
* @author treeroot O=2|'L'h!
* @since 2006-2-2 k4ti#3W5eG
* @version 1.0 Bz ;r<Kn
*/ n4kq=Z%
public class ImprovedMergeSort implements SortUtil.Sort { "ioO_
wmr?ANk
private static final int THRESHOLD = 10; ^Gk`n
M1kA-Xr
/* {]Zan'{PCO
* (non-Javadoc) 5.6tVr
* ({!!b"B2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ""-wM~^D
*/ }YDi/b7
public void sort(int[] data) { 5tlRrf
int[] temp=new int[data.length]; 3IMvtg
mergeSort(data,temp,0,data.length-1); [ \_o_W
} :.x(( FU
&!8 WRJ
private void mergeSort(int[] data, int[] temp, int l, int r) { =npE?wK
int i, j, k; (A~7>\r +
int mid = (l + r) / 2; 0#]fEi
if (l == r) Bg~]u+c*
return; ZQfxlzj+X
if ((mid - l) >= THRESHOLD) @N Yl4N
mergeSort(data, temp, l, mid); \(Sly&gL
else x?wvS]EBg
insertSort(data, l, mid - l + 1); H3rA ?F#+*
if ((r - mid) > THRESHOLD) -%`~3*L
mergeSort(data, temp, mid + 1, r); w jkh*Y
else <<>+z5D+
insertSort(data, mid + 1, r - mid); aRMlE*yW
~n]5iGz
for (i = l; i <= mid; i++) { _@ao$)q{J
temp = data; *?X&Y8Kf
} u<S`"MR:J
for (j = 1; j <= r - mid; j++) { #%E`~&[
temp[r - j + 1] = data[j + mid]; *E/Bfp1LIe
} [9">}l
int a = temp[l]; LIID(s!bX
int b = temp[r]; >G5aFk
for (i = l, j = r, k = l; k <= r; k++) { yvB]rz} i
if (a < b) { yzS^8,
data[k] = temp[i++]; =d{6=2Pt
a = temp; 4zMvHe
} else { [bh?p+V
data[k] = temp[j--]; 40kAGs>_
b = temp[j]; ?6:qAFw
} sq'm)g
} kOQ)QX
} I0}.!
ukR0E4p
/** XJ<"S p
* @param data \L*%?~
* @param l _w\9 \<%
* @param i 6eSo.@*l
*/ SxRJ{m~
private void insertSort(int[] data, int start, int len) { j[r}!;O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -$Fj-pO\
} J8:s=#5
} C7%R2>}?f
} roS" q~GS,
} v,-Tk=qP
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堆排序： Q#p)?:o/
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package org.rut.util.algorithm.support; t=P+m
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import org.rut.util.algorithm.SortUtil; <j'K7We/tP
rbd0`J9fq
/** Dd?G4xUG
* @author treeroot agUdI_'~@9
* @since 2006-2-2 ^)dsi
* @version 1.0 CPJ<A,V
*/ R{@saa5I(>
public class HeapSort implements SortUtil.Sort{ UdO8KD#r3
SP%X@~d
/* (non-Javadoc) :xsZz$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bq8#'K2i,
*/ xGsOnY;
public void sort(int[] data) { ~}_^$l8#-Q
MaxHeap h=new MaxHeap(); E/:U,u{
h.init(data); |#yu
for(int i=0;i h.remove(); if'=W6W
System.arraycopy(h.queue,1,data,0,data.length); kORWj<
} /!Rva"
mE<_oRM)
private static class MaxHeap{ kZ% AGc
iV{_?f1jo
void init(int[] data){ .V;,6Vq
this.queue=new int[data.length+1]; 45JL{YRN
for(int i=0;i queue[++size]=data; *Dg@fxCQ
fixUp(size); Wg}KQ6 6
} >|SIqB<%:
} ? $B4'wc5
6{+yAsI
private int size=0; L2VwW
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private int[] queue; {vD$odi
`:C1Wo^<
public int get() { d*6f,z2=
return queue[1]; 3/RwCtc
} N]W*ei
Y(,RJ&7
public void remove() { Y][12{I{
SortUtil.swap(queue,1,size--); 2c Xae
fixDown(1); eCI'<^
} $oW=N
file://fixdown *B&P[n
private void fixDown(int k) { 'dj3y/ k%
int j; J`5VE$2M
while ((j = k << 1) <= size) { (U'n1s/X
if (j < size %26amp;%26amp; queue[j] j++; 6/;YS[jX
if (queue[k]>queue[j]) file://不用交换 +C`!4v\n
break; 1EV bGe%b
SortUtil.swap(queue,j,k); nFni1cCD
k = j; Ft>B% -;
} hlVC+%8
} b()8l'x_|K
private void fixUp(int k) { wiI@DJ>E
while (k > 1) { ^y>V-R/N
int j = k >> 1; a#1r'z~]}
if (queue[j]>queue[k]) KGJSGvo+y
break; KF7w{A){
SortUtil.swap(queue,j,k); D*.3]3-I
k = j; va@;V+cD
} ;W{z"L;nX
} >)K3
!/}4_s`,
} /o4_rzR?
UA.Tp[u
} vJ0v6\
B>i%:[-e
SortUtil： G4i%/_JU
bm;iX*~
package org.rut.util.algorithm; $@VJ@JAe
i7dDklj4
import org.rut.util.algorithm.support.BubbleSort; ,.Ofv):=
import org.rut.util.algorithm.support.HeapSort; E]q>ggeNH
import org.rut.util.algorithm.support.ImprovedMergeSort; N~|f^#L
import org.rut.util.algorithm.support.ImprovedQuickSort; q;AD#A|\
import org.rut.util.algorithm.support.InsertSort; OG#^d5(
import org.rut.util.algorithm.support.MergeSort; lZwjrU| _
import org.rut.util.algorithm.support.QuickSort; C 9%bD
import org.rut.util.algorithm.support.SelectionSort; \B')2phE
import org.rut.util.algorithm.support.ShellSort; 3JD62wtx
;*5z&1O
/** Dml?.-Uv<
* @author treeroot 9?Bh8%$
* @since 2006-2-2 hEjvtfM9\-
* @version 1.0 U,b80%k:
*/ vT5GUO{5
public class SortUtil { b$2=w^*
public final static int INSERT = 1; 3~`\FuHHe
public final static int BUBBLE = 2; 3+>R%TX6i<
public final static int SELECTION = 3; M0m%S:2
public final static int SHELL = 4; A]"6/Lr9P
public final static int QUICK = 5; azmeJpC
public final static int IMPROVED_QUICK = 6; 2\{/|\
public final static int MERGE = 7; 9{u/|,rq1
public final static int IMPROVED_MERGE = 8; QY+{ OCB
public final static int HEAP = 9; G$zY&
tic3a1
public static void sort(int[] data) { j&[lDlI_
sort(data, IMPROVED_QUICK); kXV
} jYU0zGpj
private static String[] name={ .NdsKhg b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e`+
}; 6 w!qZ4$
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private static Sort[] impl=new Sort[]{ em'3 8L|(
new InsertSort(), Q-, 4
new BubbleSort(), k&yBB%g
new SelectionSort(), a\-5tYo`u
new ShellSort(), oItC;T
new QuickSort(), f$ /C.E
new ImprovedQuickSort(), g?1bEOA!
new MergeSort(), [GknE#p
new ImprovedMergeSort(), wB8548C}-
new HeapSort() =YYqgNz+\w
}; 2s2KI=6
:SFf}
public static String toString(int algorithm){ x^3K=l;N
return name[algorithm-1]; >CCy2W^W
} s,J\nbj0h
f[zKA{R
public static void sort(int[] data, int algorithm) { ,9|7{j|u
impl[algorithm-1].sort(data); j.Y!E<e4]
} =[4C[s
z@[n?t!7k
public static interface Sort { t":^:i'M
public void sort(int[] data); [9EL[}
} #~*v*F~3
=]Y'xzJuu
public static void swap(int[] data, int i, int j) { +SV!QMIg
int temp = data; :^7_E&
data = data[j]; K0*er
data[j] = temp; 6mZpyt
} 2QHu8mFU
} .O5|d+S