[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; @\!ww/QT
} (xbIUz.
int i1=l; db'K!M)
int i2=mid+1; 2?*||c==*
for(int cur=l;cur<=r;cur++){ vsc&Ju%k
if(i1==mid+1) }{A?PHV5
data[cur]=temp[i2++]; j"i#R1T
else if(i2>r) \x(.d.l/
data[cur]=temp[i1++]; *CzCUu:%t
else if(temp[i1] data[cur]=temp[i1++]; ;HP#bx
else 2p+C%"n>
data[cur]=temp[i2++]; ^B|YO8.v
} j!7Qw 8
} ZRPE-l_3:
my4\mi6P
} S{-f$Q*
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改进后的归并排序: Tn /Ut}]O
22|"K**3J|
package org.rut.util.algorithm.support; r 3|4gG
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import org.rut.util.algorithm.SortUtil; i0iez9B
Y|:YrZSC
/** xFU5\Zuw
* @author treeroot [1Uz_HY["3
* @since 2006-2-2 i_NJ -K
* @version 1.0 fQP,=
*/ H@Q`
public class ImprovedMergeSort implements SortUtil.Sort { puA|NT
4j{oaey
private static final int THRESHOLD = 10; W~<m[#:6C
lJUy;yp_+
/* \1]rlzXGUT
* (non-Javadoc) W-ez[raY
* _Ds@lVY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >IBTBh_ka
*/ d-h"JZ9
public void sort(int[] data) { UP]1(S?
int[] temp=new int[data.length]; CIEJql?`
mergeSort(data,temp,0,data.length-1); X% X$Y6
} Hv8H.^D>
ODek%0=
private void mergeSort(int[] data, int[] temp, int l, int r) { &>g~-s
int i, j, k; mbGcDG[HQ
int mid = (l + r) / 2; *Wso3 6an
if (l == r) p&\K9hfi
return; @UV{:]f~e
if ((mid - l) >= THRESHOLD) o)p[ C
mergeSort(data, temp, l, mid); gJKKR]4*
else K?[)E3
insertSort(data, l, mid - l + 1); ^&-a/'D$,
if ((r - mid) > THRESHOLD) 1|]xo3j"'
mergeSort(data, temp, mid + 1, r); dqxd3,Z
else [g`,AmR\!
insertSort(data, mid + 1, r - mid); 7=vYO|a/4
W_%W%i|
for (i = l; i <= mid; i++) { ^4 8\>-Q\
temp = data; e"~)Utk
} wA631kr
for (j = 1; j <= r - mid; j++) { VXwPdMy*L
temp[r - j + 1] = data[j + mid]; ogJ<e_m
} nPOO3!<{
int a = temp[l]; 3}j1RYtz
int b = temp[r]; Za0gs @$
for (i = l, j = r, k = l; k <= r; k++) { St2Q7K5s{
if (a < b) { VKNp,Lf
data[k] = temp[i++]; `R0Y+#$8h
a = temp; vtZ?X';wh
} else { >D~w}z/fk
data[k] = temp[j--]; Z(`r-}f I
b = temp[j]; |(RZ/d<X\a
} "$DldHC
} c|Y!c!9F
} _Z.cMYN
{-h, ZdH^
/** fnWsm4
* @param data S/fW/W*/}
* @param l CL1 oAk
* @param i MJ\r 4n
*/ +sRP<as
private void insertSort(int[] data, int start, int len) { `s%QeAde
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); / gu3@@h
} 'in@9XO
} kW+G1|
} ).Gd1pE
} :3 y_mf>
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堆排序： h R~v
@hsbq
package org.rut.util.algorithm.support; JhJLqb@q
LipxAE?O
import org.rut.util.algorithm.SortUtil; 9~~UM<66W
np=kTJ
/** V^2-_V]8
* @author treeroot \K}aQKB/j
* @since 2006-2-2 8YKQItK
* @version 1.0 ~#Aa Ldq
*/ r)8z#W>s
public class HeapSort implements SortUtil.Sort{ "xn|zB
LABNj{=D!
/* (non-Javadoc) :Y^I]`lR"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]u0Jd#@
*/ a_{6Qdl
public void sort(int[] data) { dyO E6Ex
MaxHeap h=new MaxHeap(); s:b"\7
h.init(data); c3#q0Ma
for(int i=0;i h.remove(); Vo >Xp
System.arraycopy(h.queue,1,data,0,data.length); 6c&Y
} (bvoF5%
nB&j
private static class MaxHeap{ R04J3D|
>0T Za
void init(int[] data){ SX_4=^
this.queue=new int[data.length+1]; H(&Z:{L
for(int i=0;i queue[++size]=data; t!t=|JNf{
fixUp(size); 6v>z h
} \igaQ\~
} oCuV9dA.
uw"*zBxl
private int size=0; {g_@Tuu
c{4R*|^
private int[] queue; U0IE1_R
u(2BQO7
public int get() { w~LU\Ct
return queue[1]; y<*-tZV[
} %Rarr
n|C|&
public void remove() { o_rtH|ntX5
SortUtil.swap(queue,1,size--); 6pm~sD
fixDown(1); j|(:I:]
} 9^\hmpP@D
file://fixdown N"1QX6
private void fixDown(int k) { Q.ukY@L.'
int j; 4U{m7[
while ((j = k << 1) <= size) { O]ZC+]}/
if (j < size %26amp;%26amp; queue[j] j++; q~O>a0f0
if (queue[k]>queue[j]) file://不用交换 75AslL?t
break; 61|B]ei/
SortUtil.swap(queue,j,k); FWY[=S
k = j; JJ-i_5\q
} U|?,N0%Z1
} kFwxK"n@C
private void fixUp(int k) { L[]BzsIv
while (k > 1) { -_|]N/v\
int j = k >> 1; zo44^=~%
if (queue[j]>queue[k]) hVf^
break; h[Mdr
SortUtil.swap(queue,j,k); =fWdk\Wv
k = j; vi|Zit
} >UWStzH<
} ZAeQ~ j~
(}"S)#C
} n1 v,#GE
?0z)EPQ|
} X" \}sl5
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SortUtil： M=[th
QiU_hz6?v
package org.rut.util.algorithm; RJPcn)@l
H+`*Y<F@
import org.rut.util.algorithm.support.BubbleSort; *B{-uc3o
import org.rut.util.algorithm.support.HeapSort; v$3_o :
import org.rut.util.algorithm.support.ImprovedMergeSort; #_fY4vEO
import org.rut.util.algorithm.support.ImprovedQuickSort; SUu >6'LN
import org.rut.util.algorithm.support.InsertSort; >a@>N
import org.rut.util.algorithm.support.MergeSort; +?V0:Kz]
import org.rut.util.algorithm.support.QuickSort; [+gzdLad
import org.rut.util.algorithm.support.SelectionSort; pl\b-
import org.rut.util.algorithm.support.ShellSort; 4>k I^
-[$&s FD
/** 0'@u!m?
* @author treeroot >?V<$>12
* @since 2006-2-2 )&z4_l8`=
* @version 1.0 ]QS](BbD:
*/ L#ZLawG
public class SortUtil { (3O1?n[n
public final static int INSERT = 1; KIIym9%
public final static int BUBBLE = 2; zX~}]?|9
public final static int SELECTION = 3; )S Q('vwg
public final static int SHELL = 4; H%C\Uz"o
public final static int QUICK = 5; yQwVQUW8B
public final static int IMPROVED_QUICK = 6; waQtr,m)
public final static int MERGE = 7; HamEIL-l.
public final static int IMPROVED_MERGE = 8; _[JkJwPTx
public final static int HEAP = 9; ; 8E;
{MxnIg7'
public static void sort(int[] data) { :'Xr/| s
sort(data, IMPROVED_QUICK); :x+ig5
} <m1sSghg
private static String[] name={ k/bque
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6w!e?B2/%
}; L=m:/qQL
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private static Sort[] impl=new Sort[]{ ]#5^&w)'
new InsertSort(), 2&x7W*
new BubbleSort(), Z(UD9wY5m
new SelectionSort(), 4|F#gK5E
new ShellSort(), cAibB&`~
new QuickSort(), ^jOCenE3
new ImprovedQuickSort(), QT;Va#a
new MergeSort(), 1LyT7h
new ImprovedMergeSort(), @'HT;Q!\Vd
new HeapSort() xE1rxPuq)d
}; VF=Z`
CO'ar,
public static String toString(int algorithm){ DB~MYOX~
return name[algorithm-1]; y;:]F|%<
} G *@@K
e`AUYli"
public static void sort(int[] data, int algorithm) { fkG##!
impl[algorithm-1].sort(data); 4,zvFH*AH
} ^9'$Oa,*
avBua6i'
public static interface Sort { C#$6O8O
public void sort(int[] data); P\T|[%E'
} 5&*zY)UL
;Z4o{(/zU
public static void swap(int[] data, int i, int j) { <tW:LU(!
int temp = data; t9Vb~ Ubdb
data = data[j]; YLmjEs%
data[j] = temp; #s{aulx
} (Com,
} 1 KB7yG-#6