[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; 5|~nX8>
} 6K )K%a,9
int i1=l; AE+BrN +"2
int i2=mid+1; H2H[DVKv
for(int cur=l;cur<=r;cur++){ XI|k,Ko<
if(i1==mid+1) Rnoz[1y?0
data[cur]=temp[i2++]; c~~4eia)
else if(i2>r) ke!
data[cur]=temp[i1++]; S~ Z<-@S
else if(temp[i1] data[cur]=temp[i1++]; )/vom6y*
else !h4A7KBYG
data[cur]=temp[i2++]; ,Jh#$mil
} 9l"=]7~%
} 7y3WV95Z\
=.CiKV$E
} 9a=>gEF],@
NtM ?Jh
改进后的归并排序: ~;]kqYIJ
=+K?@;?
package org.rut.util.algorithm.support; ^"p. 3Hy
}:{9!RMO
import org.rut.util.algorithm.SortUtil; ]Ml
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/** EPH n"YK
* @author treeroot Bm,Vu 1]t
* @since 2006-2-2 e ><0crb
* @version 1.0 ^+CWo@.
*/ {|hg3R~A
public class ImprovedMergeSort implements SortUtil.Sort { nIr`T^c9c
q4Wr$T$gs=
private static final int THRESHOLD = 10; %cg| KB"l
$pAJ$0=sw
/* vG'#5%,|
* (non-Javadoc) M;Pry3J
* .MG83Si
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8U(o@1PT
*/ ` 6*]cn#(
public void sort(int[] data) { B~ i
int[] temp=new int[data.length]; $l"%o9ICG
mergeSort(data,temp,0,data.length-1); ^~-YS-.J#,
} R'`'q1=R
&K60n6q{aQ
private void mergeSort(int[] data, int[] temp, int l, int r) { zsQ|LwQ
int i, j, k; K$Vu[!l`
int mid = (l + r) / 2; *|g[Mn
if (l == r) 2[Lv_<i|
return; *l{epum;
if ((mid - l) >= THRESHOLD) Nj3iZD|
mergeSort(data, temp, l, mid); u%e~a]
else -W1p=od
insertSort(data, l, mid - l + 1); AK,'KO%{=
if ((r - mid) > THRESHOLD) ~?Ky{jah:^
mergeSort(data, temp, mid + 1, r); cjPXrDl{\
else z,ERq,g+L
insertSort(data, mid + 1, r - mid); x1#>"z7
7~QI4'e
for (i = l; i <= mid; i++) { ur8+k4]\"
temp = data; 5Y^"&h[/
} :K]7(y7>
for (j = 1; j <= r - mid; j++) { 96<oX:#
temp[r - j + 1] = data[j + mid]; t!3N|`x
} u-,}ug|
int a = temp[l]; lTqlQ<`V
int b = temp[r]; DbH;DcV7
for (i = l, j = r, k = l; k <= r; k++) { eIalcBY
if (a < b) { /Yp#`}Ii
data[k] = temp[i++]; lP`BKc,
a = temp; \alV #>J5
} else { ]}N01yw|s
data[k] = temp[j--]; )h]#:,pm
b = temp[j]; =?.oH|&\h
} uStAZ~b\
} Dho6N]86r
} 3._ ep
6 Ln~b<I
/** 4\&Y;upy+
* @param data F!EiF&[\J
* @param l QcQ%A%VIV
* @param i |A'I!Jm
*/ kJ FWk
private void insertSort(int[] data, int start, int len) { /9G72AD!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Lcpe*C x-
} 9%T"W
} i^%$ydg
} (^ EuF]
} I* C~w
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堆排序： ulIEx~qP
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package org.rut.util.algorithm.support; ":Tm6Nj
Yw3'9m^
import org.rut.util.algorithm.SortUtil; '1ySBl1>
vlbZ5
/** Vz/w.%_g
* @author treeroot _=s9o/Cn]
* @since 2006-2-2 -Y/i h(I^
* @version 1.0 O+=%Mz(l
*/ 4kM/`g6?,q
public class HeapSort implements SortUtil.Sort{ !B%em%Tv
^-~JkW'z
/* (non-Javadoc) ?x #K:a?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~< bpdI0
*/ H\ejW@<;h
public void sort(int[] data) { mfQ#n!{ZH
MaxHeap h=new MaxHeap(); 0Xh_.PF
h.init(data); Xh;.T=/E|
for(int i=0;i h.remove(); >%U+G0Fq
System.arraycopy(h.queue,1,data,0,data.length); \s5Uvws
} |g3:+&
b/z-W`gw
private static class MaxHeap{ ja_8n["z
]WDmx$"&e
void init(int[] data){ ^b+>r
this.queue=new int[data.length+1]; RtMI[
for(int i=0;i queue[++size]=data; v<!S_7h
fixUp(size); 29RP$$gR
} DQXUh#t\(]
} ?8V.iHJk
eTx9fxw
private int size=0; ux&"TkEp
W%g*sc*+
private int[] queue; I1E9E$m5\<
.Az36wD
public int get() { E?XaU~cpc
return queue[1]; QPx5`{nN
} %vJHr!x
46A sD
public void remove() { SraZxuPg>
SortUtil.swap(queue,1,size--); qLDj\%~(
fixDown(1); elCYH9W^
} !'jq.RawP
file://fixdown ^U_T<x8{
private void fixDown(int k) { !,[#,oy;
int j; yXR1NYg
while ((j = k << 1) <= size) { `Y?VQ~ci>
if (j < size %26amp;%26amp; queue[j] j++; 6^"QABc
if (queue[k]>queue[j]) file://不用交换 w==BSH[
break; 4!Js="
SortUtil.swap(queue,j,k); %hnBpz
k = j; r<+C,h;aww
} k5S;G"iJ
} 2!/Kt O)i^
private void fixUp(int k) { wGArR7r
while (k > 1) { LlQsc{Ddf
int j = k >> 1; !2LX+*;
if (queue[j]>queue[k]) cJ96{+
break; p`Pa;=L
SortUtil.swap(queue,j,k); ~$HB}/
k = j; Y_'ERqQ
} n N<N~
} t/iI!}
b&z#ZY
} lYx_8x2
Zo3!Hs ZA
} ;l@94)@0
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SortUtil： h:%,>I%{
d/7fJ8y8
package org.rut.util.algorithm; MgJ6{xzz
7=l~fKu
import org.rut.util.algorithm.support.BubbleSort; 2Xt4Rqk$
import org.rut.util.algorithm.support.HeapSort; u;`]U$Qq9
import org.rut.util.algorithm.support.ImprovedMergeSort; OpUfK4U)
import org.rut.util.algorithm.support.ImprovedQuickSort; bWswF<y-
import org.rut.util.algorithm.support.InsertSort; )/;KxaKt
import org.rut.util.algorithm.support.MergeSort; p/h\QG1
import org.rut.util.algorithm.support.QuickSort; Y [`+7w
import org.rut.util.algorithm.support.SelectionSort; ?*fa5=ql
import org.rut.util.algorithm.support.ShellSort; Ww]$zd-bo
Lzh8-d=HQ
/** xE1?)
* @author treeroot bwsKdh
* @since 2006-2-2 mk>; 3m*
* @version 1.0 RaJTya^
*/ v ccH(T
public class SortUtil { t%=7v)IOE
public final static int INSERT = 1; nh} Xu~#_
public final static int BUBBLE = 2; INg0[Lpc
public final static int SELECTION = 3; sU_K^=6*
public final static int SHELL = 4; f@OH~4FG
public final static int QUICK = 5; w$}q`k'
public final static int IMPROVED_QUICK = 6; 2@|`Ugjptl
public final static int MERGE = 7; ]EiM~n
public final static int IMPROVED_MERGE = 8; iiPVqU%
public final static int HEAP = 9; X{-4w([
s5VK
public static void sort(int[] data) { NdXHpq;
sort(data, IMPROVED_QUICK); 0]DOiA
} 8?yIixhw
private static String[] name={ .hT>a<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O =Z}DGa+
}; .a%6A#<X
;2f=d_/x
private static Sort[] impl=new Sort[]{ VeA@HC`?"
new InsertSort(), ^)AECn
new BubbleSort(), V*p[6{U0
new SelectionSort(), n ay\)
new ShellSort(), HsCL%$k
new QuickSort(), voa)V1A/]
new ImprovedQuickSort(), |9E:S
new MergeSort(), 8em'7hR9
new ImprovedMergeSort(), 5nG\J g7
new HeapSort() "Lp.*o
}; W5R/Ub@g
m}]{Y'i]R
public static String toString(int algorithm){ &;BhL%)}
return name[algorithm-1]; QiPqN$n
} _}l(i1o,/
|+cz\+
public static void sort(int[] data, int algorithm) { t~+M>Fjm?d
impl[algorithm-1].sort(data); <y6`8J7:
} PQHztS"
km%r{
public static interface Sort { >F$9&s&
public void sort(int[] data); QQJGqM3a2
} s9?mX@>h
{53FR
public static void swap(int[] data, int i, int j) { H=/1d.p
int temp = data; ]iV]7g8:
data = data[j]; <5zR-UA>
data[j] = temp; oC&}lp)q
} omfX2Oa2
} A*h8 o9M