[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; io4/M<6<
} {F*81q\
int i1=l; hr GfA
int i2=mid+1; (#r>v h(
for(int cur=l;cur<=r;cur++){ 9Jf.Ls
if(i1==mid+1) #)<WQZ)
data[cur]=temp[i2++]; :c&F\Q=
else if(i2>r) zCpXF<_C
data[cur]=temp[i1++]; 53?B.\
else if(temp[i1] data[cur]=temp[i1++]; OjY#xO+'
else $4rMYEn08
data[cur]=temp[i2++]; /m*+N9)
} Z E},xU%
} _n3"
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} P%kJq^&
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改进后的归并排序: ,*{9g6
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package org.rut.util.algorithm.support; 7@9R^,M4:
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import org.rut.util.algorithm.SortUtil; fBt`D !Z8
$3:O}X>
/** >^+c s^jCM
* @author treeroot 9]*hP](
* @since 2006-2-2 7V7iIbi
* @version 1.0 J~1=?</
*/ aEC&#Q(]q
public class ImprovedMergeSort implements SortUtil.Sort { L[p[m~HjG^
Eza B}BLQ9
private static final int THRESHOLD = 10; ^/v!hq_#%&
;,jms~ik
/* 3h>56{P
* (non-Javadoc) :~dI2e\:
* Kx5VR4f`J@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PLDp=T%
*/ p |xMXoa`
public void sort(int[] data) { kX:d?*{KB
int[] temp=new int[data.length]; ugMfpT)
mergeSort(data,temp,0,data.length-1); 81/t)Cp
} %DF-;M"8
a2`|6M;
private void mergeSort(int[] data, int[] temp, int l, int r) { jM|-(Es.)
int i, j, k; 5oR/Q|^
int mid = (l + r) / 2; hS7o=G[
if (l == r) -PH!U Hg
return; aYPD4yX"/
if ((mid - l) >= THRESHOLD) H+2m
mergeSort(data, temp, l, mid); t"L-9kCM
else e8ZMB$byP
insertSort(data, l, mid - l + 1); p7d[)* L>C
if ((r - mid) > THRESHOLD) ;bxL$1
mergeSort(data, temp, mid + 1, r); _^"0"<,
else -H(\[{3{V
insertSort(data, mid + 1, r - mid); K#<cuHGC
Ju 0
for (i = l; i <= mid; i++) { lQnqPQY
temp = data; B&k"B?9mL
} /qX=rlQ/n
for (j = 1; j <= r - mid; j++) { eZ[O:Wvk:
temp[r - j + 1] = data[j + mid]; |oI]
} $bT<8:g
int a = temp[l]; P% ZCACzV
int b = temp[r]; OKp0@A)8
for (i = l, j = r, k = l; k <= r; k++) { 1{7*0cv$iL
if (a < b) { (*\*7dIo
data[k] = temp[i++]; v08Xe*gNU
a = temp; ;`MKi5g
} else { W|aFEY
data[k] = temp[j--]; 57eA(uI
b = temp[j]; 5 U{}A\q
} WTP~MJ#C
} l^*'W(%
} gx)!0n;
r @ IyK%
/** ^u[n!R\
* @param data PQFr4EY?i
* @param l DU>#eR0G
* @param i h1'j1uI
*/ (lBwkQNQGd
private void insertSort(int[] data, int start, int len) { ^saH^kg1"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <; (pol|
} AqHH^adzA:
} !uJDhC
} Q(J6;s#b
} 8KU5x#
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堆排序： =u#xPI0:
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package org.rut.util.algorithm.support; XFU['BI
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import org.rut.util.algorithm.SortUtil; $8"G9r
ggn:DE"
/** a*gzVE7W#n
* @author treeroot p Y[dJxB
* @since 2006-2-2 c8cPGm#i
* @version 1.0 vUU)zZB~
*/ @L ,hA v^
public class HeapSort implements SortUtil.Sort{ 4)XZ'~|
SZ[,(h
/* (non-Javadoc) =5jng.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lQSKY}h
*/ )LP=IT
public void sort(int[] data) { 93aRWEu3
MaxHeap h=new MaxHeap(); `/0S]?a.{B
h.init(data); 1:+f@#
for(int i=0;i h.remove(); R!8qkG
System.arraycopy(h.queue,1,data,0,data.length); / .ddx<
} ,xeJf6es
;$Q&2}L[
private static class MaxHeap{ DiLZ5^`]
9+o`/lk1
void init(int[] data){ .7|kxJq
this.queue=new int[data.length+1]; #o]/&T=N=
for(int i=0;i queue[++size]=data; X!vBD
fixUp(size); ^+m6lsuA
} '4""Gz
} 0$~zeG"
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private int size=0; C;C= g1I}
TZ2-%k#
private int[] queue; muc>4!Q
Pq@%MF]5
public int get() { Av#_cL
return queue[1]; u\9t+wi}<
} `(rnD
XDWR]
public void remove() { fi6i{(K
SortUtil.swap(queue,1,size--); O_u2V'jy9
fixDown(1); FXi"o $N
} ~F ,mc.
file://fixdown -J$,W`#z
private void fixDown(int k) { ~x:B@Ow
int j; CE'd`_;HLn
while ((j = k << 1) <= size) { >8*J ;(:W
if (j < size %26amp;%26amp; queue[j] j++; "?<$>\@; q
if (queue[k]>queue[j]) file://不用交换 lLb"><8a
break; P'dH*}H
SortUtil.swap(queue,j,k); :Rq>a@Rp
k = j; Kn!n}GtR
} 8 )W{&#C>
} ?%RN? O(
private void fixUp(int k) { VX!UT=;
while (k > 1) { NR*s7>
int j = k >> 1; ZT\=:X*e
if (queue[j]>queue[k]) {b<;?Dus^
break; jC;^2e
SortUtil.swap(queue,j,k); EPE9HvN
k = j; [-*1M4D9
} gg-4ce/
} U0PQ[Y#\
VKjDK$
} }52]
V@QWJZ"
} xTy[X"sJ
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SortUtil： xzqgem`[\
\,b@^W6e>
package org.rut.util.algorithm; @.PVUP
lBbUA)z6
import org.rut.util.algorithm.support.BubbleSort; jI-\~
import org.rut.util.algorithm.support.HeapSort; ]Ywj@-*q
import org.rut.util.algorithm.support.ImprovedMergeSort; SP,#KyWP0)
import org.rut.util.algorithm.support.ImprovedQuickSort; UY)e6 Zd
import org.rut.util.algorithm.support.InsertSort; 9&>)4HNd?
import org.rut.util.algorithm.support.MergeSort; nMniHB'
import org.rut.util.algorithm.support.QuickSort; uEK9
import org.rut.util.algorithm.support.SelectionSort; eq|G\XJ
import org.rut.util.algorithm.support.ShellSort; }3"FQ/6C
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/** bR6g^Yf
* @author treeroot zPC&p{S>
* @since 2006-2-2 ranLHm.nB
* @version 1.0 VeJM=s.y7
*/ w}OJ2^
public class SortUtil { &_LFV@/
public final static int INSERT = 1; Kn WjP21
public final static int BUBBLE = 2; !yo/ F&6
public final static int SELECTION = 3; L7_qs+
public final static int SHELL = 4; qM."W=XVN
public final static int QUICK = 5; dFu<h
public final static int IMPROVED_QUICK = 6; ~s :Ml
public final static int MERGE = 7; DQ<{FN
public final static int IMPROVED_MERGE = 8; 8hTtBa
public final static int HEAP = 9; J^Dkx"1GD
y?t2@f]!XK
public static void sort(int[] data) { lcv&/ A
sort(data, IMPROVED_QUICK); RY>BP[h
} @+9x8*~S'
private static String[] name={ yEaim~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E!~Ok
}; "1<>c/h
<`B4+:;w6
private static Sort[] impl=new Sort[]{ |Ew~3-u!
new InsertSort(), ^* xhbM;
new BubbleSort(), I$#B#w?!$r
new SelectionSort(), 0X`sQNx
new ShellSort(), }\9elVt'2
new QuickSort(), "kE$2Kg
new ImprovedQuickSort(), 3Ishe"
new MergeSort(), +}XFkH~
new ImprovedMergeSort(), Ddf7wszW
new HeapSort() zfAkWSY
}; vS! TnmF
:V(+]<
public static String toString(int algorithm){ 7rc6
return name[algorithm-1]; 4QK~qAi
} w3l+BUn:X
P4M*vZq)
public static void sort(int[] data, int algorithm) { 3$.R=MQ7
impl[algorithm-1].sort(data); }mz6z<pJ_
} our$Ka31
~f.fg@v`+v
public static interface Sort { e~Oge
public void sort(int[] data); NW/RQ(
} PRs[!EB6
X&B2&e;
public static void swap(int[] data, int i, int j) { $_j\b4]%
int temp = data; qdlz#-B
data = data[j]; .,)C^hs@
data[j] = temp; .pP{;:Avpn
} mSw$? >
} l>KkK|!T^i