[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; K&gE4;>
} $83Qd
int i1=l; /P46k4M1U
int i2=mid+1; ,VUOsNN4\
for(int cur=l;cur<=r;cur++){ ux6)K= ]
if(i1==mid+1) MU `!sb*
data[cur]=temp[i2++]; xdaq` ^Bbt
else if(i2>r) d|~'#:y@
data[cur]=temp[i1++]; P%Q'w
else if(temp[i1] data[cur]=temp[i1++]; t.O~RE
else 'Ce?!UO
data[cur]=temp[i2++]; #}~?8/h!
} 5 /oW/2"
} z.2UZ%:
rxJl;!7G
} [(TmAEON
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改进后的归并排序: d>#X+;-k
? IlT[yMw
package org.rut.util.algorithm.support; h. 4#C}> )
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import org.rut.util.algorithm.SortUtil; o"P)(;
K)Z~ iBRM
/** s9+lC!!
* @author treeroot j b'M
* @since 2006-2-2 2lN0Sf@
* @version 1.0 [ws;|nh
*/ I.~=\%Z{
public class ImprovedMergeSort implements SortUtil.Sort { !mwMSkkq
b`DPlQHj
private static final int THRESHOLD = 10; )u]=^
ZdPqU\G^q
/* _ogN
* (non-Javadoc) +~,q"6
* \FCPD.2s+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o~4kJW#
*/ JP ;SO
public void sort(int[] data) { b{x/V9&|
int[] temp=new int[data.length]; /Zx"BSu
mergeSort(data,temp,0,data.length-1); SymlirL
} _pvt,pW
M9~'dS'XI
private void mergeSort(int[] data, int[] temp, int l, int r) { f= }!c*l"
int i, j, k; **1=|aa:
int mid = (l + r) / 2; n3eWqwQ$5
if (l == r) E\9HZ;}G
return; 5UK}AkEe&x
if ((mid - l) >= THRESHOLD) N693eN!
mergeSort(data, temp, l, mid); +~ Y.m8
else 5s4x%L (~}
insertSort(data, l, mid - l + 1); .;,,{;
if ((r - mid) > THRESHOLD) j9/iBK\Y
mergeSort(data, temp, mid + 1, r); g@?R"
else 2sEG#/Y=
insertSort(data, mid + 1, r - mid); }#=t%uZ/
fmLDufx
for (i = l; i <= mid; i++) { 3{ea~G)[9
temp = data; I-kK^_0mV<
} fti0Tz'
for (j = 1; j <= r - mid; j++) { _KyhX|
temp[r - j + 1] = data[j + mid]; KxFA@3
} p-!/p#
int a = temp[l]; )lUocm
int b = temp[r]; q8R,#\T*
for (i = l, j = r, k = l; k <= r; k++) { ! 8Ro5),
if (a < b) { q 4Ok$~"I
data[k] = temp[i++]; }h3[QUVf%
a = temp; jsKKg^g
} else { I.SMn,N
data[k] = temp[j--]; GFnwj<V+{
b = temp[j]; m5P@F@
} n#4T o;CS
} rV-Xsf7Z
} /P/0\3TCi
lX50JJwk
/** 7(o:J
* @param data `Uvc^
* @param l ,Vz-w;oDn
* @param i "N}MhcdS
*/ DwTVoCC
private void insertSort(int[] data, int start, int len) { 4JH^R^O<n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U:PtRSdn!b
} e%9zY{ABR%
} l Yj$3
} onv0gb/J
} V-63
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堆排序： yVpru8+eD
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package org.rut.util.algorithm.support; R"z}q(O:
^ZBTd5t#
import org.rut.util.algorithm.SortUtil; UZ:z|a3
i0?/\@gd
/** E429<LQI/
* @author treeroot 3_{rXtT)'
* @since 2006-2-2 usi3z9P>n
* @version 1.0 #nj;F'O](
*/ mMCd
public class HeapSort implements SortUtil.Sort{ *d 4A3|
PHH,vO[eO
/* (non-Javadoc) md/h\o&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7$R^u7DZ
*/ Tj6Czq=*%T
public void sort(int[] data) { ZF<$6"4N
MaxHeap h=new MaxHeap(); tq*6]q8c>
h.init(data); }Cb-7/
for(int i=0;i h.remove(); T*(mi{[T
System.arraycopy(h.queue,1,data,0,data.length); ;j<#VS-]
} q[. p(6:
-f<}lhmQ
private static class MaxHeap{ =C7<I
"837b/>/
void init(int[] data){ = ^%*:iT
this.queue=new int[data.length+1]; h=kC3ot\
for(int i=0;i queue[++size]=data; 4`+R |"4
fixUp(size); q1rD>n&d
} %."w]fy>P
} \@{TF((Y
WZviC_
private int size=0; v++&%
{~'Iu8TvZ
private int[] queue; O`9vEovjs
1V,DcolRY
public int get() { sP>-k7K.
return queue[1]; 1T4#+kW&
} b |ijkys
z6Nz)$!_i
public void remove() { *c(YlfeZ#
SortUtil.swap(queue,1,size--); q5) K
fixDown(1); J7kqyo"
} a3Xd~Qs
file://fixdown {?}^HW9{
private void fixDown(int k) { 5'|W(yR}
int j; ;[:IC^9fv
while ((j = k << 1) <= size) { wf^p?=Ke
if (j < size %26amp;%26amp; queue[j] j++; 12tAx3p
if (queue[k]>queue[j]) file://不用交换 IGA4"\s
break; n3\~H9
SortUtil.swap(queue,j,k); q{xF7}i
k = j; r( bA>L*mk
} }Am5b@g"$Y
} =8Z-ORW51
private void fixUp(int k) { jK{qw
while (k > 1) { 5YgT*}L+,
int j = k >> 1; ZdT-
if (queue[j]>queue[k]) py wc~dWvz
break; :8A@4vMS)?
SortUtil.swap(queue,j,k); {WTy/$ Qk
k = j; xg'xuz$U
} 79+i4(H
} DjvPeX
.OlPVMFt
} 1%";|
)E^Pn|H
} wVF qkJ
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SortUtil： l,UOP[j
zNg[%{mz
package org.rut.util.algorithm; ~,x4cOdR#
?kF? ~\c
import org.rut.util.algorithm.support.BubbleSort; ]\/"-Y#4Q
import org.rut.util.algorithm.support.HeapSort; 3sl6$NKo
import org.rut.util.algorithm.support.ImprovedMergeSort; 9&Z+K'$=
import org.rut.util.algorithm.support.ImprovedQuickSort; xiqeKoAD
import org.rut.util.algorithm.support.InsertSort; Tsdgg?#
import org.rut.util.algorithm.support.MergeSort; Dnd
import org.rut.util.algorithm.support.QuickSort; MieO1l
import org.rut.util.algorithm.support.SelectionSort; C;_00EQ=
import org.rut.util.algorithm.support.ShellSort; UMK9[Iy$<M
-U|Z9sia
/** nx%eq,Pq
* @author treeroot Ou+bce
* @since 2006-2-2 i*T -9IP
* @version 1.0 AN)r(86L
*/ u>*qDr*d
public class SortUtil { "1UpoF'w
public final static int INSERT = 1; NIp]n[=.q
public final static int BUBBLE = 2; (g1Op~EM
public final static int SELECTION = 3; jPn.w,=)27
public final static int SHELL = 4; N7_(,Gu*R
public final static int QUICK = 5; )&%Y{a#
public final static int IMPROVED_QUICK = 6; :G&:v
public final static int MERGE = 7; k+hl6$:Qj%
public final static int IMPROVED_MERGE = 8; VeOM `jy
public final static int HEAP = 9; wU"w
(#]9{C;
public static void sort(int[] data) { ``>z8t[ks
sort(data, IMPROVED_QUICK); X(Z(cY(
} @S6@pMo,
private static String[] name={ `$vf9'\+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #];ulDq
}; G?Za/G
w zi7pJjXh
private static Sort[] impl=new Sort[]{ |+qsO;
new InsertSort(), }[(v(1j='~
new BubbleSort(), _`,ZI{.J^
new SelectionSort(), /L./-92NH4
new ShellSort(), u~~ ~@p
new QuickSort(), Emw]`
new ImprovedQuickSort(), d<w]>T5VW
new MergeSort(), gu&W:FY
new ImprovedMergeSort(), |\94a
new HeapSort() n3$u9!|P
}; 3#eAXIW[
-vc ,O77z"
public static String toString(int algorithm){ +x<OyjY5?]
return name[algorithm-1]; L^K,YlNBR
} w}e_17A
Q% ^_<u
public static void sort(int[] data, int algorithm) { Hoi~(Vc.
impl[algorithm-1].sort(data); K#VGG,h7Y
} MeAY\V%G=o
\C{Zqo,
public static interface Sort { /)<kG(Z
public void sort(int[] data); .kJu17!
} &>G8DvfJ9
J|VDZ# c7
public static void swap(int[] data, int i, int j) { _nSEp>]L
int temp = data; >~tx8aI{
data = data[j]; n'%cO]nSx
data[j] = temp; AtxC(gm 1
} ,bP8"|e
} 4M+f#b1