[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*n3*rbU:
} o\M
int i1=l; K).Gj2 $
int i2=mid+1; LzS)WjEN
for(int cur=l;cur<=r;cur++){ AwC"c '
if(i1==mid+1) LXGlG
data[cur]=temp[i2++]; _>k&,p]y
else if(i2>r) Lwzk<+>w^
data[cur]=temp[i1++]; +im>|
else if(temp[i1] data[cur]=temp[i1++]; 5i$iUDuT>(
else g~A~|di|
data[cur]=temp[i2++]; ^O9_dP:
} Kb/w+J S
} Pr!H>dH8o
`E4+#_ v
} Q)$RE{*-
15/lX
改进后的归并排序: d7*fP S
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package org.rut.util.algorithm.support; : }q~<
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import org.rut.util.algorithm.SortUtil; nKO4o8js{{
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/** -VO&#Mt5u
* @author treeroot ?_VoO
* @since 2006-2-2 4$wn8!x2|
* @version 1.0 3O'6 Ae
*/ )Gu:eYp+`
public class ImprovedMergeSort implements SortUtil.Sort { $&C~Qti|G
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private static final int THRESHOLD = 10; T08SGB]
gZ^'hW-{
/* zo^34wW^
* (non-Javadoc) p1blPBlp
* |@+/R .l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S]O0zv^}
*/ $BPTk0Y
public void sort(int[] data) { @rV|7%u
int[] temp=new int[data.length]; SdJGhU
mergeSort(data,temp,0,data.length-1); 9 :ubPqt
} ! /^Jma7n
|BC/ERms
private void mergeSort(int[] data, int[] temp, int l, int r) { A0@E^bG
int i, j, k; $1F$3"k
int mid = (l + r) / 2; G 5T{*
if (l == r) !L=RhMI
return; +'@j~\>^yJ
if ((mid - l) >= THRESHOLD) nc.(bb),
mergeSort(data, temp, l, mid); qpCNvhi
else ]m(C}}
insertSort(data, l, mid - l + 1); CHojF+e
if ((r - mid) > THRESHOLD) I_k!'zR[N
mergeSort(data, temp, mid + 1, r); s[}4Q|s%
else .EXe3!J)!
insertSort(data, mid + 1, r - mid); :|V`QM
T[<deQ
for (i = l; i <= mid; i++) { QR#L1+Hn
temp = data; NQdz]o
} 0|^/e-^
for (j = 1; j <= r - mid; j++) { Z +vT76g3
temp[r - j + 1] = data[j + mid]; ~hk;OB;
} E;vF :?|
int a = temp[l]; G""L1?
int b = temp[r]; +pefk+
for (i = l, j = r, k = l; k <= r; k++) { Bc!ZHW*&
if (a < b) { "~|;XoMU
data[k] = temp[i++]; 1>pFUf|cV
a = temp; 43HZ)3!me
} else { &l0-0T>
data[k] = temp[j--]; FB\lUO)U\c
b = temp[j]; us0{y7(p
} ayR;|S
} !=f$ [1
} ylo/]pVs
@7fx0I'n
/** Hx|<NS0}_
* @param data |_ADG
* @param l A;'*>NS
* @param i 0Gr^#`
*/ "{lw;AA5F
private void insertSort(int[] data, int start, int len) { ?cH,!2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t'.oty=
} mx ]a@tu
} jO9w7u6
} ku&m)'
} 'cpO"d?{
-<jd/ 5
堆排序： !idQ-&
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package org.rut.util.algorithm.support; Z{".(?+}1
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import org.rut.util.algorithm.SortUtil; ,o{|W9
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/** \LI 2=J*
* @author treeroot &|%F=/VU
* @since 2006-2-2 j0eGg::
* @version 1.0 yE6EoC^
*/ AvxP0@.`
public class HeapSort implements SortUtil.Sort{ :-.K.Ch|:
]JUb;B;Z
/* (non-Javadoc) nG+L'SmI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wRATe 0'
*/ $zR[2{bg
public void sort(int[] data) { &AS<2hB
MaxHeap h=new MaxHeap(); KXS{@/"-B
h.init(data); Naqz":%.
for(int i=0;i h.remove(); [&B}{6wry
System.arraycopy(h.queue,1,data,0,data.length); @=0O'XM
} &M5_G$5n
eKT'd#o2R
private static class MaxHeap{ -j<g}IG
}p <p(
void init(int[] data){ H)Kt!v8
this.queue=new int[data.length+1]; ':[:12y[
for(int i=0;i queue[++size]=data; $d +n},[C{
fixUp(size); ,O;+fhUJ(
} ^UJ#YRzi
} `"#0\Wh
cfg_xrW0^
private int size=0; w{HDCPuS
NETji:d
private int[] queue; (K}Md~
qOi3`6LCV
public int get() { 4wa8Vw`
return queue[1]; \i +=tGY
} Mb2rHUr
J(s%"d
public void remove() { 51Nh"JTy
SortUtil.swap(queue,1,size--); jl:dKL@
fixDown(1); :6 \?{xD
} a33SY6.
file://fixdown %mv9+WJN.
private void fixDown(int k) { x,3oa_'E
int j; qUMM}ls
while ((j = k << 1) <= size) { bO:m^*
if (j < size %26amp;%26amp; queue[j] j++; o YZmz
if (queue[k]>queue[j]) file://不用交换 HVz,liq
break; bN',-[E
SortUtil.swap(queue,j,k); n5yPUJK2L6
k = j; !N::1c@C
} 3XeCaq'N
} QvF UFawN
private void fixUp(int k) { [8sL);pJO
while (k > 1) { %NI'PXpI
int j = k >> 1; N;.cZp2
if (queue[j]>queue[k]) NUclF|G
break; 6EeUiLd
SortUtil.swap(queue,j,k); 9m:qQ1[\
k = j; 3}}#'5D
} 9kkYD
} GsG9;6c+u
TN=MZ{L
} 'aWzam>
<<Fk[qMA
} wJ|wAS
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SortUtil： HKr6h?Si^
&>!WhC16
package org.rut.util.algorithm; tVf1]3(_>
LAoX'^6
import org.rut.util.algorithm.support.BubbleSort; x4HVB
import org.rut.util.algorithm.support.HeapSort; )$wX~k
import org.rut.util.algorithm.support.ImprovedMergeSort; g!k'tizYD
import org.rut.util.algorithm.support.ImprovedQuickSort; mB:I8g7
import org.rut.util.algorithm.support.InsertSort; m>@$T x
import org.rut.util.algorithm.support.MergeSort; "I|[m%\
import org.rut.util.algorithm.support.QuickSort; I&}Md73
import org.rut.util.algorithm.support.SelectionSort; !u}}V
import org.rut.util.algorithm.support.ShellSort; kdWk{ZT^
x{B%TM-Ey
/** ">? y\#OA
* @author treeroot qX(sx2TK
* @since 2006-2-2 0CYm%p8!
* @version 1.0 Tk'YpL#U
*/ "ct_EPr`
public class SortUtil { ?\7" A
public final static int INSERT = 1; Jk.Ec)w
public final static int BUBBLE = 2; xY/ S;dE
public final static int SELECTION = 3; U 9?!|h;7
public final static int SHELL = 4; \mt0mv;c
public final static int QUICK = 5; d45JT?qg&
public final static int IMPROVED_QUICK = 6; FuYV}C
public final static int MERGE = 7; Rks3L
public final static int IMPROVED_MERGE = 8; h4xRRyK
public final static int HEAP = 9; IEB|Y
#eqy!QdePf
public static void sort(int[] data) { k^pf)*p
sort(data, IMPROVED_QUICK); =9oN#4mWK
} s-Mzl?o
private static String[] name={ ?hu$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %h ?c
}; ]i=\5FH e
kpkN GQ2
private static Sort[] impl=new Sort[]{ mn=G6h T}W
new InsertSort(), (+Yerc.NQt
new BubbleSort(), Jmln*,Ol7
new SelectionSort(), h5bQ
new ShellSort(), Xm7Nr#
new QuickSort(), HDyus5g
new ImprovedQuickSort(), K4vl#*qn
new MergeSort(), O;qerE?i`
new ImprovedMergeSort(), X9f!F2x
new HeapSort() Q<y&*o3YF|
}; *Mt's[8
J`ia6fy.I
public static String toString(int algorithm){ /=x) 9J
return name[algorithm-1]; +3 2"vq)_
} Og`6>?>97
rZDmZm?=
public static void sort(int[] data, int algorithm) { xQ `>\f
impl[algorithm-1].sort(data); t` R#pQ
} /{.
bP`.teO\
public static interface Sort { <Gy)|qpK[
public void sort(int[] data); 0R,?$qM\
} yIwAJl7Xf
:N~1fvx
public static void swap(int[] data, int i, int j) { nlsQf3
int temp = data; sskwJu1
data = data[j]; Qa nE]
data[j] = temp; o;XzJ#P
} JDi|]JY
} 9PA\Eo|Yb