[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; +ue1+#
} ',xUU{5?
int i1=l; `)5WA{z
int i2=mid+1; UGd\`*Cj
for(int cur=l;cur<=r;cur++){ 4`)r1D!U
if(i1==mid+1) c-5AI{%bl6
data[cur]=temp[i2++]; \b%c_e
else if(i2>r) FNuE-_
data[cur]=temp[i1++]; y2#"\5dC
else if(temp[i1] data[cur]=temp[i1++]; 0;@>jo6,!
else d/jP2uuA
data[cur]=temp[i2++]; (_!I2"Q*
} vb?.`B_>&
} 9od*N$
c_S~{a44Ud
} #;~HoOK*#
^"D^D`$@
改进后的归并排序: {Q37a=;,
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package org.rut.util.algorithm.support; W6}>iB
q^<HG]
import org.rut.util.algorithm.SortUtil; j'U1lEZm2
K:jn^JN$
/** i!}6FBZ
* @author treeroot Axns
* @since 2006-2-2 S<NK!89
* @version 1.0 akt7rnt?i
*/ hrq% {!Z
public class ImprovedMergeSort implements SortUtil.Sort { m7y[Y
;5L^)Nyd
private static final int THRESHOLD = 10; :H3/+/x
i0$*):b
/* /hu>MZ(\
* (non-Javadoc) \QC{38}
* g hmn3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -e}(\
*/ ` 6*]cn#(
public void sort(int[] data) { lH`TF_
int[] temp=new int[data.length]; h2T\%V_j
mergeSort(data,temp,0,data.length-1); _J!&R:]$
} 2aCf?l(
k9OGnCW\
private void mergeSort(int[] data, int[] temp, int l, int r) { "FA.T7G
int i, j, k; >h\u[I$7
int mid = (l + r) / 2; Lo_+W1+
if (l == r) fn,hP_
return; RC[Sa wA
if ((mid - l) >= THRESHOLD) 3: WEODV2
mergeSort(data, temp, l, mid); wpYk`Lr
else -JF^`hBD-
insertSort(data, l, mid - l + 1); VqV[ @[P
if ((r - mid) > THRESHOLD) Ad>81=Z
mergeSort(data, temp, mid + 1, r); jzJTV4&zjs
else mN}szW,
insertSort(data, mid + 1, r - mid); {eI'0==
t4#gW$+^?H
for (i = l; i <= mid; i++) { r!dWI
temp = data; 3sdL\
} qE[YZ(/f0&
for (j = 1; j <= r - mid; j++) { vs=q<Uw)
temp[r - j + 1] = data[j + mid]; "lw|EpQk`
} |&JeJ0k>~
int a = temp[l]; ,G%UU~/a
int b = temp[r]; =xIZJ8e
for (i = l, j = r, k = l; k <= r; k++) { z/xPI)R[
if (a < b) { j;y~vX b
data[k] = temp[i++]; M yHv>
a = temp; pg4pfi^__V
} else { G2kU_
data[k] = temp[j--]; M)+pH
b = temp[j]; -)oUb=Lk{
} [,Go*r
} }' AY#g
} W6i{yneW
bg-/ 8,
/** .7^(~&5N
* @param data 9;U?_
* @param l t kj
* @param i Y /_CPY
*/ LZe)_9$
private void insertSort(int[] data, int start, int len) { Na/Y1RW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); iOURS
} w'(/dr
} Xj/z),
} *"8Ls0!
} N7J?S~x
8^ f:-5
堆排序： {:uv}4Z
BNNM$.ZIQ
package org.rut.util.algorithm.support; rnj$u-8
u3+B/ 5x
import org.rut.util.algorithm.SortUtil; tj@(0}pi4
1B2#uhT]r
/** ]qv0Y~+`-K
* @author treeroot Yu3S3aRE
* @since 2006-2-2 4G(7V:
* @version 1.0 K'r;#I|"J
*/ l(sVnhL6h
public class HeapSort implements SortUtil.Sort{ !="q"X/*
`2s@O>RV
/* (non-Javadoc) ~h@@y5<4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0W*{ 1W
*/ L/tn;0
public void sort(int[] data) { P{n#^4
MaxHeap h=new MaxHeap(); hvw9i7#
h.init(data); >Dr(%z6CN
for(int i=0;i h.remove(); B{j><uxl
System.arraycopy(h.queue,1,data,0,data.length); JyMk @Y
} M/Yr0"%Q<.
+`Z1L\gmA
private static class MaxHeap{ NAvR^"I~
!|&|%x6@
void init(int[] data){ *tF~CG$r
this.queue=new int[data.length+1]; wL?Up>fr
for(int i=0;i queue[++size]=data; v&YeQC>
fixUp(size); #%p44%W
} c,2& -T}
} Lkm-<
tf~B,?
private int size=0; w_56y8Pd4
{g%N(2
private int[] queue; BUBx}dbCM
eTS}-
public int get() { $5&%X'jk
return queue[1]; {\[Gl
} \tI%[g1M
~U]g;u
public void remove() { ;AEfU^[
SortUtil.swap(queue,1,size--); LBK{-(%
fixDown(1); 2@zduL'do_
} Sf,z
file://fixdown pD$4nH4KST
private void fixDown(int k) { Iy9hBAg\y
int j; |q77
while ((j = k << 1) <= size) { `uMEK>b
if (j < size %26amp;%26amp; queue[j] j++; k <oB9J
if (queue[k]>queue[j]) file://不用交换 |NfFe*q0;8
break; ^Qs}2%
SortUtil.swap(queue,j,k); '9V/w[mI
k = j; Q4"\k. ?
} n(F!t,S1i
} r.H`3m.0q
private void fixUp(int k) { )r9 9zdUk
while (k > 1) { !uEEuD#
int j = k >> 1; a+^`+p/5
if (queue[j]>queue[k]) AatSN@,~z
break; [MTd<@
SortUtil.swap(queue,j,k); !LN8=u.
k = j; tUv>1) [
} >D,Oav
} xPm. TPj
=:WZV8@%
} Ap dXsL
R{#< NE
} l$;"yVdks
b&z#ZY
SortUtil： Zo3!Hs ZA
uks75W!}U
package org.rut.util.algorithm; h&<"jCjL
J6Z[c*W
import org.rut.util.algorithm.support.BubbleSort; i 9) Gt
import org.rut.util.algorithm.support.HeapSort; .Mq#88o.*
import org.rut.util.algorithm.support.ImprovedMergeSort; 0WUBj:@g
import org.rut.util.algorithm.support.ImprovedQuickSort; 7Q .Su
import org.rut.util.algorithm.support.InsertSort; Z,).)y#B
import org.rut.util.algorithm.support.MergeSort; g&Vhu8kNIA
import org.rut.util.algorithm.support.QuickSort; bwsKdh
import org.rut.util.algorithm.support.SelectionSort; )0"Q h
import org.rut.util.algorithm.support.ShellSort; CY1WT
oPSPb(.
/** uwNJM
* @author treeroot ;,4*uU'vq
* @since 2006-2-2 /7AHd ;
* @version 1.0 eHphM;C
*/ \`n(JV
public class SortUtil { 5 D|#l*V
public final static int INSERT = 1; 8?yIixhw
public final static int BUBBLE = 2; `a83RX_\
public final static int SELECTION = 3; F]$ Nu
public final static int SHELL = 4; 6V;Dcfvi
public final static int QUICK = 5; /UCBoQ$/]
public final static int IMPROVED_QUICK = 6; HsCL%$k
public final static int MERGE = 7; uJ% <+I
public final static int IMPROVED_MERGE = 8; 22l'kvo4"
public final static int HEAP = 9; x5lVb$!G
`~GXK
public static void sort(int[] data) { NQdwj>_a
sort(data, IMPROVED_QUICK); H,7='n7"
} 4)8k?iC*
private static String[] name={ Rh'z;Gyr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,1-%C)
}; *lfjsrPu
f1'ByV'2
private static Sort[] impl=new Sort[]{ X5)D[aE6
new InsertSort(), oC&}lp)q
new BubbleSort(), mb\T)rj
new SelectionSort(), uo:RNokjJ
new ShellSort(), 1[egCC\Mo_
new QuickSort(), R`j"iC2
new ImprovedQuickSort(), ^twyy9VR
new MergeSort(), IFLphm5
new ImprovedMergeSort(), N8sT?
new HeapSort() bmT%?it
}; #qd!_oN
Ws2q/[\oz
public static String toString(int algorithm){ !r/i<~'Bx
return name[algorithm-1]; c&c
} *l7 `C)
d?oXz|;H(
public static void sort(int[] data, int algorithm) { {z oGwB
impl[algorithm-1].sort(data); =ejcP&-V/
} uP9b^LEoN
2CC"Z
public static interface Sort { c)EYXo
public void sort(int[] data); E~y8X9HZ)
} U][E`[m#
l+;S$evY
public static void swap(int[] data, int i, int j) { Au2^ T1F
int temp = data; +w0Wg.4V
data = data[j]; Ana[>wSZO@
data[j] = temp; 1d<?K7%^
} 2a@X-Di
} iwnGWGcuS