[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; ?(' wn<
} GfxZ'VIn
int i1=l; fa jGZyd0:
int i2=mid+1; |B?m,U$A!
for(int cur=l;cur<=r;cur++){ X:f UI4
if(i1==mid+1) h0*!;Z7
data[cur]=temp[i2++]; u:6Ic)7'
else if(i2>r) v+W&9>
data[cur]=temp[i1++]; )al]*[lY
else if(temp[i1] data[cur]=temp[i1++]; -]N x,{
else 9tU]`f
data[cur]=temp[i2++]; ''A_[J `>
} [N-Di"
} e&|'I"
@wGPqg
} 6y-@iJ*ld;
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改进后的归并排序: 7X`g,b!
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package org.rut.util.algorithm.support; n*R])=F@c
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import org.rut.util.algorithm.SortUtil; 'Cb6Y#6
uanhr)Ys
/** 8l>?Pv
* @author treeroot 6C1#/
* @since 2006-2-2 J|W<;
* @version 1.0 1jmjg~W
*/ JK7G/]j+Ez
public class ImprovedMergeSort implements SortUtil.Sort { A9KET$i@v
.Yamc#A-
private static final int THRESHOLD = 10; :(E@Gf
5N#aXG^9
/* A]_7}<<N
* (non-Javadoc) NlA,'`,
* oM X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lF<]8m%F
*/ N~nziY*C,*
public void sort(int[] data) { +RHS!0
int[] temp=new int[data.length]; ^rB8? kt
mergeSort(data,temp,0,data.length-1); aj-Km`5r}
} k%]3vRo<
f$o_e90mu
private void mergeSort(int[] data, int[] temp, int l, int r) { vz@A;t
int i, j, k; {UX!go^J
int mid = (l + r) / 2; gT6z9
if (l == r) &pxg. 3
return; J@/kIrx
if ((mid - l) >= THRESHOLD) [7:,?$tC
mergeSort(data, temp, l, mid); CQc+#nRe
else o3XvRj
insertSort(data, l, mid - l + 1); @JiLgIe`
if ((r - mid) > THRESHOLD) 0.Q Ujw
mergeSort(data, temp, mid + 1, r); %HhBt5w
else ,5P0S0*{
insertSort(data, mid + 1, r - mid); [CTnXb
'9%\;
for (i = l; i <= mid; i++) { B5,N7z34F
temp = data; <X#C)-.
} ^7`BP%6
for (j = 1; j <= r - mid; j++) { [>vLf2OID
temp[r - j + 1] = data[j + mid]; v1#otrf
} ,X?{07gH
int a = temp[l]; P7ao5NP
int b = temp[r]; j}#w)M
for (i = l, j = r, k = l; k <= r; k++) { bS{bkE>
if (a < b) { m=1N>cq '
data[k] = temp[i++]; !K#qeY}
a = temp; K$z2YJ%
} else { x[|}.Ew
data[k] = temp[j--]; $o!zUH~'v
b = temp[j]; tb 5`cube
} kx8G
} `](e:be}
} qfX6TV5J}!
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/** +l42Awl>K
* @param data .S EdY:
* @param l l&[O
* @param i ),_@WW;k
*/ uIY#e<)}G
private void insertSort(int[] data, int start, int len) { n5|fHk^s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O4 w(T
} "BAK !N$9
} xKbXt;l2
} SA:Zc^aV
} D=TvYe
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堆排序： ?C]vS_jAh
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package org.rut.util.algorithm.support; PhLn8jNti
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import org.rut.util.algorithm.SortUtil; pt?bWyKG
NCveSP
/** )',R[|<
* @author treeroot {.`vs;U
* @since 2006-2-2 @?ebuj5{e
* @version 1.0 ]IaMp788
*/ ~"gA,e-)
public class HeapSort implements SortUtil.Sort{ rV.}PtcFY
` #0:gEo
/* (non-Javadoc) @b\$yB@z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1> ?M>vK
*/ n>z9K')
public void sort(int[] data) { IZf{nQ[0
MaxHeap h=new MaxHeap(); >[f?vrz
h.init(data); ,};&tR
for(int i=0;i h.remove(); 'I|v[G$l
System.arraycopy(h.queue,1,data,0,data.length); j\yjc/m
} XoK:N$\}t
$L`d&$Vh
private static class MaxHeap{ 'JtBZFq
P-[-pi@
void init(int[] data){ /|w6:;$;mn
this.queue=new int[data.length+1]; `6;?9NI
for(int i=0;i queue[++size]=data; e v}S+!|U
fixUp(size); +SzU
} 3qgS&js 7
} uuEV_"X
6dQ-HI*Y#
private int size=0; a9e>iU
2B1q*`6R
private int[] queue; je\Ph5"
85= )lu
public int get() { rCEyQ)R_}
return queue[1]; !"AvY y9
} m~BAyk^jo3
TJd)K$O>
public void remove() { .D~;u-%|F
SortUtil.swap(queue,1,size--); fy1|$d{'
fixDown(1); Mc lkEfn
} W_293["lS
file://fixdown S)(.,x
private void fixDown(int k) { Ng&%o
int j; - nm"of\o
while ((j = k << 1) <= size) { 2YL?,uLS
if (j < size %26amp;%26amp; queue[j] j++; 4(n-_BS
if (queue[k]>queue[j]) file://不用交换 &$BjV{,/zc
break; 1y&\5kB
SortUtil.swap(queue,j,k); @3i\%R)n;
k = j; bG"~"ipn%
} +.8 \p5
} >tS'Q`R
private void fixUp(int k) { d7^}tM
while (k > 1) { b#c:u2
int j = k >> 1; &N9 a<w8+
if (queue[j]>queue[k]) 'ycJMYP8
break; Ep_HcX`
SortUtil.swap(queue,j,k); OG~gFZr)6
k = j; u2I*-K
} YpHg&|Fr
} @)+AaC#-
gk4;>}
} 7O2/z:$f
8LJ8 }%*
} &,vcJ{.
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SortUtil： J-:.FKf\5l
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package org.rut.util.algorithm; ;<Sd~M4f
hR n<em
import org.rut.util.algorithm.support.BubbleSort; CZe ]kXNv
import org.rut.util.algorithm.support.HeapSort; )CYGQMK
import org.rut.util.algorithm.support.ImprovedMergeSort; ;1W6G=m
import org.rut.util.algorithm.support.ImprovedQuickSort; <V'@ks%
import org.rut.util.algorithm.support.InsertSort; QhFVxCA
import org.rut.util.algorithm.support.MergeSort; 3yme1Mb
import org.rut.util.algorithm.support.QuickSort; ? V1*cVD6i
import org.rut.util.algorithm.support.SelectionSort; yu {d! {6
import org.rut.util.algorithm.support.ShellSort; t,Lrfv])
udH7}K v
/** ]]![EHi(\
* @author treeroot TprTWod2]t
* @since 2006-2-2 LrfVh-}|:Y
* @version 1.0 1nM #kJ"
*/ <{p4V|:
public class SortUtil { 4KAZ ':
public final static int INSERT = 1; &AMl:@p9
public final static int BUBBLE = 2; mUC)gA/
public final static int SELECTION = 3; PQt")[
public final static int SHELL = 4; A QU+mo
public final static int QUICK = 5; L+F@:H6/0
public final static int IMPROVED_QUICK = 6; f)rq%N &
public final static int MERGE = 7; KkyVSoD\
public final static int IMPROVED_MERGE = 8; S72+d%$
public final static int HEAP = 9; YaqR[F
k}CVQ@nd
public static void sort(int[] data) { )m+W j
sort(data, IMPROVED_QUICK); ssA`I<p#
} A 'be8
private static String[] name={ ZoqZap6e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2W(s(-hD
}; 3NqB <J
\\ij(>CI
private static Sort[] impl=new Sort[]{ :G=fl)!fE
new InsertSort(), Ny7S
new BubbleSort(), y7cl_rK
new SelectionSort(), /<k/7TF`
new ShellSort(), (/YHk`v2
new QuickSort(), <nf@U>wlw
new ImprovedQuickSort(), ]mq|w
new MergeSort(), F<1fX7c
new ImprovedMergeSort(), -IudgO]
new HeapSort() qo~O|~
}; EWt[z.`T1
//MUeTxR
public static String toString(int algorithm){ dFc':|
return name[algorithm-1]; h4}84}5d
} \K{ z
]c*4J\s
public static void sort(int[] data, int algorithm) { qZh/IW
impl[algorithm-1].sort(data); =*.~BG
} C=xa5Y
P;no?
public static interface Sort { ,Vax&n+J
public void sort(int[] data); }#+^{P3;
} rHI{aO7
I,DS@SK
public static void swap(int[] data, int i, int j) { QL/(72K
int temp = data; rXq.DvQ
data = data[j]; cZ*@$%_
data[j] = temp; O\tb R=
} xH,a=8&9
} 7z,C}-q