[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; mBWE^
} oVi_X98R
int i1=l; 2y6@:VxSh
int i2=mid+1; T.ZPpxY
for(int cur=l;cur<=r;cur++){ 81?7u!=ic+
if(i1==mid+1) x~1.;dBF
data[cur]=temp[i2++]; WOqAVd\
else if(i2>r) WZ}je!82
data[cur]=temp[i1++]; Arvxl(R\4
else if(temp[i1] data[cur]=temp[i1++]; 5WhR|
else "p]Fq,
data[cur]=temp[i2++]; +!_?f'kv`
} 0u0<)gdX
} r=57,P(:Ca
jvfVB'Tmr
} u=j|']hp#&
2hB';Dv
改进后的归并排序: Mou@G3
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package org.rut.util.algorithm.support; YA(_*h
<(|No3jx
import org.rut.util.algorithm.SortUtil; 6@0 wKV!D
dFdll3bC
/** }mGOEG|F2
* @author treeroot e<_yr>9g"
* @since 2006-2-2 MYVUOd,
* @version 1.0 bpe8 `b(#
*/ 7\.Ax
public class ImprovedMergeSort implements SortUtil.Sort { PT2b^PP
"= H.$ +
private static final int THRESHOLD = 10; E>_?9~8Mf
}qf9ra
/* *7`N^e
* (non-Javadoc) O_}ZSB8"
* e[`E-br^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &uLxAw
*/ !AR$JUnX
public void sort(int[] data) { 6Mpbmfr
int[] temp=new int[data.length]; r 5$(
mergeSort(data,temp,0,data.length-1); B_f0-nKP
} m>po+7"b
79.J`}#
private void mergeSort(int[] data, int[] temp, int l, int r) { 5f54E|vD
int i, j, k; 8mjP2
int mid = (l + r) / 2; `i{k^Q
if (l == r) e"jA#Y #
return; IKJ~sw~AQ
if ((mid - l) >= THRESHOLD) O5"o/Y~m
mergeSort(data, temp, l, mid); c[=%v]j:u
else WA);Z=
insertSort(data, l, mid - l + 1); hl4@Y#n
if ((r - mid) > THRESHOLD) Sr7+DCr
mergeSort(data, temp, mid + 1, r); C=LXL1x2e
else OtopA)
insertSort(data, mid + 1, r - mid); ?nm:e.S+?
!U02>X
for (i = l; i <= mid; i++) { KR
temp = data; cQ4TYr;?
} Q@3.0Hf|{
for (j = 1; j <= r - mid; j++) { wu*WA;FnA
temp[r - j + 1] = data[j + mid]; `[+9n2j
} 9"yBO`
int a = temp[l]; =k4yWC5-
int b = temp[r]; /Vpd*obMB
for (i = l, j = r, k = l; k <= r; k++) { cz_4cMgxu
if (a < b) { lYd#pNN
data[k] = temp[i++]; kndP?#> p1
a = temp; nG#lrYZw
} else { ?e|'I"
data[k] = temp[j--]; rT`D@ I
b = temp[j]; #vO3*-hs
} o3H+.u$
} Xco$ yF%
} Tb-`0^y&X1
'e6W$?z
/** C9-9cdW H
* @param data UI~ENG
* @param l 0XlX7Sk+
* @param i i'!M<>7
*/ .?SClTqg
private void insertSort(int[] data, int start, int len) { }?P~qJ|1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t\2myR3
} YYI
} $Z;HE/3
} <$liWAGX\
} 5iola}6
< %Qw dEO
堆排序： >qA5
i_GE9A=h
package org.rut.util.algorithm.support; A>L(#lz#ek
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import org.rut.util.algorithm.SortUtil; JxQwxey{
*jWU8.W
/** 7YbI|~
* @author treeroot Q:+Y-&||"
* @since 2006-2-2 K*J8(/WkD
* @version 1.0 a@@!Eg A
*/ vg5zsR0u
public class HeapSort implements SortUtil.Sort{ 8Gb=aF1
hoC}@8_
/* (non-Javadoc) .Jdw:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?Di,'
*/ ?xf59mY7
public void sort(int[] data) { yZ&By?.0
MaxHeap h=new MaxHeap(); i:#R U^R
h.init(data); Pi?*rr5WZ
for(int i=0;i h.remove(); =nnS X-x
System.arraycopy(h.queue,1,data,0,data.length); yh_s(>sh
} I#l9
%9mCgHQ9
private static class MaxHeap{ :0T]p"y4
?HIc=
void init(int[] data){ `n-e.{O((
this.queue=new int[data.length+1]; u2<:mu[|P
for(int i=0;i queue[++size]=data; 9[N'HpQ3
fixUp(size); nVG\*#*]|
} NQfIY`lt'
} Vm8;{Sq
]_BG"IR!..
private int size=0; "EpE!jh
17D167\X
private int[] queue; }sy3Mrb
LWbWj ^
public int get() { MC#bo{Bq3-
return queue[1]; |iM*}Ix-
} ?vRz}hiy
B4R,[WE"
public void remove() { `@.YyPxX\
SortUtil.swap(queue,1,size--); svpWABO
fixDown(1); ! # tRl
} ECkfFE`
file://fixdown |0f\>X I
private void fixDown(int k) { qw87B!D
int j; O8u"Y0$*w
while ((j = k << 1) <= size) { 2|}p&~G(
if (j < size %26amp;%26amp; queue[j] j++; 8Z3+S)6
if (queue[k]>queue[j]) file://不用交换 y8+?:=N.
break; lRt8{GFy
SortUtil.swap(queue,j,k); 4)j<(5
k = j; Q X@&~
} Rl5}W\&
} SO p%{b
private void fixUp(int k) { e^'?:j
while (k > 1) { M`?/QU~
int j = k >> 1; LR)is
if (queue[j]>queue[k]) \yG_wZs
break; f`Wfw3
SortUtil.swap(queue,j,k); tu!u9jVv
k = j; 56<LMY|d
} kj0A%q#'}
} 3SIB #"9
q=?"0i&V
} 6C]!>i}U
Zl,K#
} OD1ns
r)j#Skh].
SortUtil： qE,%$0g
O1#rCFC|y
package org.rut.util.algorithm; W>@%d`>o5
L0&!Qct
import org.rut.util.algorithm.support.BubbleSort; V$v;lvt^Uq
import org.rut.util.algorithm.support.HeapSort; T)C
import org.rut.util.algorithm.support.ImprovedMergeSort; Fah}#,
import org.rut.util.algorithm.support.ImprovedQuickSort; "\_}"0H
import org.rut.util.algorithm.support.InsertSort; M.OWw#?p:_
import org.rut.util.algorithm.support.MergeSort; g<.8iW 'c
import org.rut.util.algorithm.support.QuickSort; |e< U%v
import org.rut.util.algorithm.support.SelectionSort; It_yh #s
import org.rut.util.algorithm.support.ShellSort; t*}<v@,
8=nm`7(]
/** }p- %~Y
* @author treeroot JAiV7v4&R
* @since 2006-2-2 :m$%D]WY
* @version 1.0 ^d=Z/d[
*/ {Zseu$c
public class SortUtil { _^'k_a
public final static int INSERT = 1; ;%k%AXw
public final static int BUBBLE = 2; t#pY2!/T3
public final static int SELECTION = 3; Gc 8
public final static int SHELL = 4; .`h+fqa
public final static int QUICK = 5; O3BU.X1'%
public final static int IMPROVED_QUICK = 6; l%w7N9
public final static int MERGE = 7; z:fhq:R(
public final static int IMPROVED_MERGE = 8; U_8I$v-~
public final static int HEAP = 9; }bnkTC
Xr)d;@yi
public static void sort(int[] data) { fglZjT
sort(data, IMPROVED_QUICK); T8m%_U#b
} ZRQPOy
private static String[] name={ !CMN/=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |y=gp
}; x<3vA|o
Rw\DJJrz
private static Sort[] impl=new Sort[]{ { o;0Fx
new InsertSort(), &1u?W%(Px
new BubbleSort(), :<(<tz7dj
new SelectionSort(), *xjIl<`pK
new ShellSort(), ~Igo 8ykl
new QuickSort(), RI*%\~6t?
new ImprovedQuickSort(), L"-&B$B:
new MergeSort(), C4cg,>P7
new ImprovedMergeSort(), PQ(%5c1e
new HeapSort() *|3z($*U]
}; 6?iP z?5
-'VT
public static String toString(int algorithm){ :|A db\b
return name[algorithm-1]; Qp?+_<{
} uA,{C%?
6FmgK"t8
public static void sort(int[] data, int algorithm) { {vH8X(m
impl[algorithm-1].sort(data); iGlZFA
} Z)&HqqT3p
a|53E<5X
public static interface Sort { r 1a{Y8?
public void sort(int[] data); j,-7J*A~
} k %rP*b*
e/3hb)#;
public static void swap(int[] data, int i, int j) { $.cGRz
int temp = data; |S}*M<0
data = data[j]; #P@r[VZ{6
data[j] = temp; Y'~&%|9+T
} c,fedH;
} [aC9vEso!