[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; w-f[h
} M0Eq 7:Ba
int i1=l; -M]NdgI
int i2=mid+1; !~X[qT
for(int cur=l;cur<=r;cur++){ ]/byz_7]
if(i1==mid+1) >`\f,yql6
data[cur]=temp[i2++]; xd[GJ;xvs
else if(i2>r) e,j2#wjor
data[cur]=temp[i1++]; F_28q15~:
else if(temp[i1] data[cur]=temp[i1++]; pPI'0x
else ~W?F.
data[cur]=temp[i2++]; UO3QwZ4j;
} +Fn^@/?yC
} luA k$Es
[!^Q_O
} LJ^n6 m|_
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改进后的归并排序: B 4s^X`?z
#jY\l&E
package org.rut.util.algorithm.support; 9 Vn
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import org.rut.util.algorithm.SortUtil; f~U~f}Uw4
2t9JiH
/** U5rcI6
* @author treeroot 2'R;z<_
* @since 2006-2-2 ?-'m#5i"
* @version 1.0 /-Saz29f^Q
*/ OnD!*jy
public class ImprovedMergeSort implements SortUtil.Sort { (_:k s
QU`M5{#
private static final int THRESHOLD = 10; NO(^P+s
93Z/|7
/* f?KHp|
* (non-Javadoc) DV={bcQ
* U`{'-L.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "Jd!TLt\x
*/ rL{3O4O
public void sort(int[] data) { >Yr-aDV
int[] temp=new int[data.length]; @UbH;m
mergeSort(data,temp,0,data.length-1); z ^e99dz
} +ZuT\P&kR5
aT9+] Ig
private void mergeSort(int[] data, int[] temp, int l, int r) { qN5 ru2
int i, j, k; gmCW__oR
int mid = (l + r) / 2; <Mdyz!
if (l == r) j@yK#==k
return; +>zjTP7\e"
if ((mid - l) >= THRESHOLD) 1_AB;^
mergeSort(data, temp, l, mid); Ino$N|G[
else [73 \jT
insertSort(data, l, mid - l + 1); i=m5M]Ef
if ((r - mid) > THRESHOLD) ,r$k79TI
mergeSort(data, temp, mid + 1, r); M%*D}s-QE
else HR.^ y$IE
insertSort(data, mid + 1, r - mid); X@ zw;Se
(lNV\Za
for (i = l; i <= mid; i++) { B=EI&+F+
temp = data; |rjHH<
} rV yw1D
for (j = 1; j <= r - mid; j++) { uL\b*rI
temp[r - j + 1] = data[j + mid]; jkTh)Bm|'
} P}YtT3.K
int a = temp[l]; *u?QO4>
int b = temp[r]; y.xt7 F1
for (i = l, j = r, k = l; k <= r; k++) { R?%J
if (a < b) { h=:*cqp4
data[k] = temp[i++]; 4rcNBmA,
a = temp; bOEO2v'cQ
} else { xiWP^dIF
data[k] = temp[j--]; kAu-=X
b = temp[j]; 5=;LHS*
} D=B$ Pv9%
} 3YKJN4
} xj6@85^
7H$I9e
/** [uJfmrEH
* @param data 6MewQ{hi
* @param l fGeDygV^`
* @param i :i{Svb*_'
*/ >i6sJ)2?>
private void insertSort(int[] data, int start, int len) { l**gM
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k-:wM`C
} q <, b
} #8Bs15aV
} u-8b,$@Z>'
} S.<aCN<@
a#huK~$~
堆排序： >yZe1CP
J?oI%r7^
package org.rut.util.algorithm.support; w5C$39e\G
m;_gNh8Ee
import org.rut.util.algorithm.SortUtil; >)Udb//
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/** wjq;9%eXk
* @author treeroot Fjs:rZ#{
* @since 2006-2-2 (G>S`B
* @version 1.0 ab}Kt($
*/ p\'0m0*
public class HeapSort implements SortUtil.Sort{ K@f@vyw]
As}eI!
/* (non-Javadoc) Bf21u9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jkQ%b.a
*/ %Tv2op
public void sort(int[] data) { 46^9O 5J
MaxHeap h=new MaxHeap(); ]+"25V'L
h.init(data); gNWTzz<[f>
for(int i=0;i h.remove(); \80W?9qj
System.arraycopy(h.queue,1,data,0,data.length); \&6^c=2=
} yd}1Mx
&'V1p4'
private static class MaxHeap{ qxQuXF>:#
5LX%S.CW
void init(int[] data){ O)aWTI
this.queue=new int[data.length+1]; Uhw:XV@m
for(int i=0;i queue[++size]=data; up@I,9C/
fixUp(size); O x),jc[/
} JK/gq}c
} {!L25
0Ym_l?]m[
private int size=0; {f(RYj
F"ua`ercI
private int[] queue; lEYAq'=
!U"?vSl
public int get() { (-[73v-w
return queue[1]; [0?W>A*h
} Q1'4xWu
_C%:AFPP>
public void remove() { iD${7 _
SortUtil.swap(queue,1,size--); Q H57[Yg
fixDown(1); k9_c<TSzu
} &cSZ?0R
file://fixdown PC<[$~
private void fixDown(int k) { V#,jUH|
int j; @OGHS}-\
while ((j = k << 1) <= size) { sqEOXO
if (j < size %26amp;%26amp; queue[j] j++; =L]GQ=d
if (queue[k]>queue[j]) file://不用交换 k^#+Wma7
break; {g]Mx|5Q
SortUtil.swap(queue,j,k); XQPlhpcv
k = j; )>]@@Trx
} NZL$#bRB
} mHF?t.y
private void fixUp(int k) { /Y`u4G()
while (k > 1) { '/'dg5bfV
int j = k >> 1; m>9j dsqB
if (queue[j]>queue[k]) 9SQcChG~j
break; 2r"J"C
SortUtil.swap(queue,j,k); P^57a?[`
k = j; ' 4.T1i,
} f 0r?cZ
} AF\gB2^
w(oi6kg
} })yB2Q0
gLK_b;:
} ?J,K[.z
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SortUtil： `LOW)|6r`
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package org.rut.util.algorithm; UBWUq
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import org.rut.util.algorithm.support.BubbleSort; t`")Re_j
import org.rut.util.algorithm.support.HeapSort; "O/ 6SV
import org.rut.util.algorithm.support.ImprovedMergeSort; 6hiWgbE
import org.rut.util.algorithm.support.ImprovedQuickSort; 1d 1 ~`B
import org.rut.util.algorithm.support.InsertSort; 4ATIF;G'<
import org.rut.util.algorithm.support.MergeSort; rHp2I6.0a
import org.rut.util.algorithm.support.QuickSort; w2) @o>w
import org.rut.util.algorithm.support.SelectionSort; 0fog/c#q(
import org.rut.util.algorithm.support.ShellSort; BMO&(g
&&ZX<wOM
/** dCA! R"HD
* @author treeroot tF:AqR:(~
* @since 2006-2-2 *t300`x
* @version 1.0 R.KznJ
*/ Th!;zu^t
public class SortUtil { -<l2 $&KS
public final static int INSERT = 1; Wi@YJ
public final static int BUBBLE = 2; oV'G67W
public final static int SELECTION = 3; I+/fX0-Lib
public final static int SHELL = 4; :E.T2na
public final static int QUICK = 5; fb8)jd'~}O
public final static int IMPROVED_QUICK = 6; !;Vqs/E
public final static int MERGE = 7; Ez / W$U
public final static int IMPROVED_MERGE = 8; MNf^ml[
public final static int HEAP = 9; 1G8,Eah
%J8uVD.2
public static void sort(int[] data) { Ip|=NQL>
sort(data, IMPROVED_QUICK); :n,x?bM
} ?|Ey WAL
private static String[] name={ v Q51-.g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BB imP
}; #~ZaN;u
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private static Sort[] impl=new Sort[]{ bTMgEY
new InsertSort(), 5KTPlqm0qF
new BubbleSort(), LSrKi$
new SelectionSort(), g?N^9B,$2
new ShellSort(), _%u t#
new QuickSort(), E:y^= Y
new ImprovedQuickSort(), ^p~QHS/
new MergeSort(), trZU_eouI
new ImprovedMergeSort(), XXA.wPD-
new HeapSort() I)MRAo
}; {f\{{JJ]
Nw '$r
public static String toString(int algorithm){ (>uA(#Z
return name[algorithm-1]; 48Jt1^
} =fJ /6
&$ fyY:<\
public static void sort(int[] data, int algorithm) { WWTRB +1>
impl[algorithm-1].sort(data); z.^_;Vql_
} f!F5d1N
Q <ulh s
public static interface Sort { 29zMs9oKPP
public void sort(int[] data); rv c%[HfW;
} "m`}J*s"
2BiFP||
public static void swap(int[] data, int i, int j) { 1amEQ
int temp = data; ^kke
data = data[j]; U6.hH%\}@
data[j] = temp; 5Z:T9F4
} JNo[<SZb
} k2(k0HFR