[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; IDt7KJ@hc
} @ojV8
int i1=l; &~N@M!`Dn
int i2=mid+1; mk`#\=GE
for(int cur=l;cur<=r;cur++){ UTxqqcqEny
if(i1==mid+1) y=e|W=<D&
data[cur]=temp[i2++]; Tml>>O
else if(i2>r) hLSas#B>
data[cur]=temp[i1++]; G8CM
else if(temp[i1] data[cur]=temp[i1++]; JN<u4\e{-&
else X./7b{Pax
data[cur]=temp[i2++]; &Y8S! W@4
} d+6-ten
} qJJ~#W)
&Ht5!zuW,
} V53iWWaFe
lT-LOu|
改进后的归并排序: !-|{B3"6
fJOA5(
package org.rut.util.algorithm.support; &n2dL->*#
R`>z>!)
import org.rut.util.algorithm.SortUtil; }woNI
.5YW>PV
/** {#TZFB
* @author treeroot X2C&q$8
* @since 2006-2-2 } |? W
* @version 1.0 a.G;s2>
*/ s#C~HK
public class ImprovedMergeSort implements SortUtil.Sort { uU`Mq8)R
FP h1}qS
private static final int THRESHOLD = 10; wb (quu
kiR+ Dsl
/* aL0,=g%
* (non-Javadoc) <.c#l':
* 8s<t* pI2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QR{pph*zn-
*/ p V`)
public void sort(int[] data) { %b3s|o3An
int[] temp=new int[data.length]; 2mPU /
mergeSort(data,temp,0,data.length-1); [f@[gE
} "s rRlu
@6z]Xb
private void mergeSort(int[] data, int[] temp, int l, int r) { \~@a/J
int i, j, k; De:| T8&
int mid = (l + r) / 2; ;{K/W.R
if (l == r) /UPe@
return; YhFd0A?]
if ((mid - l) >= THRESHOLD) 0%GQXiy
mergeSort(data, temp, l, mid); f-l(H="e
else }*M>gvPo
insertSort(data, l, mid - l + 1); Yuqt=\? #
if ((r - mid) > THRESHOLD) GUdVsZjz(
mergeSort(data, temp, mid + 1, r); xe!6Pgcb
else C.q4rr
insertSort(data, mid + 1, r - mid); .Fn7yTQ%
;UDd4@3`S"
for (i = l; i <= mid; i++) { KMogwulG
temp = data; ?CUGJT
} ~jn~M_}K
for (j = 1; j <= r - mid; j++) { 4ROuy+Ms'
temp[r - j + 1] = data[j + mid]; Q\[2BJo/
} 3!0~/8!f@
int a = temp[l]; e?)ic\K
int b = temp[r]; 6]5e(J{Fz
for (i = l, j = r, k = l; k <= r; k++) { YO`V'6\
if (a < b) { ?'r=>'6D
data[k] = temp[i++]; 8UN7(J
a = temp; I`FqZw
} else { DE_<LN
data[k] = temp[j--]; h}cR>
b = temp[j]; =^S1+B MY-
} w{5v*SHl}`
} %XAF"J
} Oa/#2C~
sAfNu~d
/** "YePd*W
* @param data ^OnZ9?C{R
* @param l UbSAyf
* @param i JUlCj#%
*/ ]B3\IT
private void insertSort(int[] data, int start, int len) { E\dJb}"x %
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /#xx,?~xx0
} G[M{TS3&Ds
} 2 rx``,7Q
} [|"{a
} ;{hE]jReH
x|`o7.
堆排序： xN=:*#Z"pb
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package org.rut.util.algorithm.support; Cqc5jx0)
0mD=Rjb*a
import org.rut.util.algorithm.SortUtil; \zGmZZ
f?|cQ[#t!\
/** z*B-`i.
* @author treeroot F>/"If#
* @since 2006-2-2 2UJjYrm
* @version 1.0 )7}f.
*/ Y$&+2w,)H,
public class HeapSort implements SortUtil.Sort{ s(MLBV5)w
C)xM>M_CB
/* (non-Javadoc) @Rp#*{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nr#" 5<W
*/ 2E*h,Mo
public void sort(int[] data) { o+I'nFtnI
MaxHeap h=new MaxHeap(); sxFkpf_h
h.init(data); `37$YdX
for(int i=0;i h.remove(); HH3Ln+AWg_
System.arraycopy(h.queue,1,data,0,data.length); 7ajkp+E6
} .`Rju|l
nYbI =_-
private static class MaxHeap{ A4`3yy{0-
\GEf,%U<K
void init(int[] data){ bfl%yGkd/|
this.queue=new int[data.length+1]; Hm*?<o9mxC
for(int i=0;i queue[++size]=data; 1DT}_0{0Q
fixUp(size); 7r,h[9~e
} deVbNg8gs
} UG:S!w'
na,i(m?l
private int size=0; 1]% ]"JbV
(Ceq@eAlT
private int[] queue; rVF7!|&
%kSpMj|
public int get() { l11+sqg
return queue[1]; $>=?'wr
} CZ4Nw]dtR
a15kFun
public void remove() { ,J)wn;@
SortUtil.swap(queue,1,size--); aq-R#q
fixDown(1); ,3~[cE<4
} ?|,-Bft3
file://fixdown w9Z,3J6r
private void fixDown(int k) { 5w#7B
int j; T(2*P5%&
while ((j = k << 1) <= size) { W_%@nm\y
if (j < size %26amp;%26amp; queue[j] j++; 3;Ztm$8
if (queue[k]>queue[j]) file://不用交换 &x>8 %Q s
break; &2\^S+4
SortUtil.swap(queue,j,k); E/IoYuB
k = j; ])3(@.
} R-lpsvDDL2
} |h(05Kbk
private void fixUp(int k) { tVFydN~
while (k > 1) { 4<(U/58a*
int j = k >> 1; I5mtr
if (queue[j]>queue[k]) W&`{3L
break; m(o^9R_=^9
SortUtil.swap(queue,j,k); "nQ&~KQ
k = j; 0P7sMCYu
} -jdhdh
} .Mb<.R3
3tu:Vc.:M
} V~!lY\
6<qVeO&uZ
} U1;<NUg
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SortUtil： lJIcU RI4
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package org.rut.util.algorithm; `y0u(m5
[,86||^
import org.rut.util.algorithm.support.BubbleSort; }ofx?s}
import org.rut.util.algorithm.support.HeapSort; 5g\>x;cc
import org.rut.util.algorithm.support.ImprovedMergeSort; @4xV3Xkf&C
import org.rut.util.algorithm.support.ImprovedQuickSort; .bloaeu-
import org.rut.util.algorithm.support.InsertSort; :Cdqj0O3u
import org.rut.util.algorithm.support.MergeSort; J*FUJT
import org.rut.util.algorithm.support.QuickSort; EPu-oE=HW4
import org.rut.util.algorithm.support.SelectionSort; UZJ<|[
import org.rut.util.algorithm.support.ShellSort; +pG[ [}/
v_L2>Pa.
/** Wv7hY"
* @author treeroot iPeW;=-2Wk
* @since 2006-2-2 [8v>jQ)
* @version 1.0 .mwB'Ll
*/ +]dh`8*8>1
public class SortUtil { H&_drxUq;L
public final static int INSERT = 1; G%FLt[
public final static int BUBBLE = 2; S\"#E:A
public final static int SELECTION = 3; ]21`x
public final static int SHELL = 4; x*7Q
public final static int QUICK = 5; @/f'i9?oM`
public final static int IMPROVED_QUICK = 6; `%ulorS
public final static int MERGE = 7; f@7HVv&
public final static int IMPROVED_MERGE = 8; J_`a}ox
public final static int HEAP = 9; tQ7:4._
)~2~q7
public static void sort(int[] data) { 7GG:1:2+>
sort(data, IMPROVED_QUICK); >O$JS,
} y)*W!]:7^>
private static String[] name={ u0{R;)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3)0z(30
}; gUWW}*\ U
E -+t[W
private static Sort[] impl=new Sort[]{ (\$=de>?
new InsertSort(), b9RJ>K
new BubbleSort(), +Z=%4
new SelectionSort(), "J"RH:$v
new ShellSort(), H9%[! RF
new QuickSort(), cf+EQY
new ImprovedQuickSort(), P1qQ)-J
new MergeSort(), aGbHDo
new ImprovedMergeSort(), !))!!{
new HeapSort() U ljWBd
}; "[ #.
cJLAP%.L
public static String toString(int algorithm){ p>9|JMk
return name[algorithm-1]; 20Z=_},
} d\-v+'d*+
E/@
public static void sort(int[] data, int algorithm) { ?DgeKA"A
impl[algorithm-1].sort(data); V:<Z
} >QSlH]M
>1 %|T
public static interface Sort { twP%+/g]<
public void sort(int[] data); <IO@Qj1*
} S;iJQS
TD.t)
public static void swap(int[] data, int i, int j) { Dn[uzY6
int temp = data; t>}(`0
data = data[j]; \__xTL\
data[j] = temp; Hj97&C{Q^
} 1A}#j
} zGaqYbQD