[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; wXw pKm
} iC- ?F cA
int i1=l; Bfhw0v]Z
int i2=mid+1; GBOz,_pw
for(int cur=l;cur<=r;cur++){ $[9,1.?C
if(i1==mid+1) p_h)|*W{
data[cur]=temp[i2++]; +9Z RCmV
else if(i2>r) d.y2`wT
data[cur]=temp[i1++]; eveGCV;@
else if(temp[i1] data[cur]=temp[i1++]; b(&~f@%|
else :(tSL{FO
data[cur]=temp[i2++]; q)JG_Y.p
} K^z-G=|N
} cy)b/4h@
2y; |6`
} FkJa+ZA
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改进后的归并排序: H{|a+
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package org.rut.util.algorithm.support; BOqq=WY
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import org.rut.util.algorithm.SortUtil; h.0Y!'?
5MY+O\
/** V+M2Gf
* @author treeroot bm1+|gssn
* @since 2006-2-2 cGSoAK
* @version 1.0 +wd} '4)
*/ MU5@(s3B?
public class ImprovedMergeSort implements SortUtil.Sort { H -('!^
R<W#.mpo6
private static final int THRESHOLD = 10; L'=e /&
\ZrLh,6f.
/* ~N+lI\K
* (non-Javadoc) /Z<"6g?
* xo{f"8}^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rhFa rm4a
*/ 'Rk~bAX
public void sort(int[] data) { i[FcY2
int[] temp=new int[data.length]; |u8hxa
mergeSort(data,temp,0,data.length-1); X;_0"g
} c)Ft#vzg&e
rXo2MX@u
private void mergeSort(int[] data, int[] temp, int l, int r) { I0ycLx
int i, j, k; wP3PI.g-g
int mid = (l + r) / 2; #$V`%2>
if (l == r) =QEg~sD^)s
return; rC]jz$sle
if ((mid - l) >= THRESHOLD) M52kau
mergeSort(data, temp, l, mid); J{72%S
else .K^'Q|?
insertSort(data, l, mid - l + 1); @ [_I|
if ((r - mid) > THRESHOLD) Db({k,P'Y
mergeSort(data, temp, mid + 1, r); lv9Ss-c4
else CaNZScnZ
insertSort(data, mid + 1, r - mid); E&0A W{
:4$Ex2
for (i = l; i <= mid; i++) { p}uTqI
temp = data; M64zVxsd
} .FK'TG
for (j = 1; j <= r - mid; j++) { &B3Eq1A
temp[r - j + 1] = data[j + mid]; {y0*cC
} :K{`0U&l5
int a = temp[l]; (\FjbY9&
int b = temp[r]; }|f\'S
for (i = l, j = r, k = l; k <= r; k++) { (_]{[dFr%
if (a < b) { l/OG79qq
data[k] = temp[i++]; jsTb0
a = temp; `xe[\Z2
} else { :7Mo0,Bw,
data[k] = temp[j--]; RLY Ae
b = temp[j]; >>krH'79
} {npKdX
} l1`Zp9I
} >rlQY>5pH
"%ag^v9
/** q,d]i/T
* @param data xt +fuL
* @param l i2b\` 805
* @param i ?zUV3Qgzj
*/ E=gD{1,?
private void insertSort(int[] data, int start, int len) { Fy-nV%P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Sw#Ez-X
} x@.iDP@(
} s9'g'O5
} DMcvu*A
} xTD6?X'4
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堆排序： f4s[R0l
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package org.rut.util.algorithm.support; u]E%R&
@&+h3dV.V
import org.rut.util.algorithm.SortUtil; jLvI!q
7|zt'.56[
/** `]]gD EPG{
* @author treeroot [OG-ZcNu?
* @since 2006-2-2 aVuan&]*=
* @version 1.0 Fhn883
*/ ?>q=Nf^Q.
public class HeapSort implements SortUtil.Sort{ =Cs$0aA
V]H<:UE
/* (non-Javadoc) 23+6u{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c%pW'UE&
*/ CCq<y
public void sort(int[] data) { K1O/>dN_\O
MaxHeap h=new MaxHeap(); ml=1R>#'
h.init(data); <Q\`2{
for(int i=0;i h.remove(); _1y|#o
System.arraycopy(h.queue,1,data,0,data.length); g/+M&k$
} l@1f L%f
sLbz@54
private static class MaxHeap{ toTAWT D
/dOQ4VA\
void init(int[] data){ pRc(>P3;
this.queue=new int[data.length+1]; WbH/K]/1)h
for(int i=0;i queue[++size]=data; !::k\}DS
fixUp(size); pY=?r{@
} spO?5#
} o~P8=1t
3}g?d/^E3
private int size=0; (]1le|+
E\m?0]W|
private int[] queue; i04Sf^
>jl"Yr#
public int get() { a^[io1}-
return queue[1]; \<lV),
} 0 {{7"
]CC~Eo-%-
public void remove() { w?M*n<) O
SortUtil.swap(queue,1,size--); +\Q6Onqr
fixDown(1); .E;6Xx_+r
} od^ha
file://fixdown QH\*l~;B\
private void fixDown(int k) { }r^MXv~(
int j; I]SR.Yp%
while ((j = k << 1) <= size) { vA`[#(C
if (j < size %26amp;%26amp; queue[j] j++; 5tq$SF42X
if (queue[k]>queue[j]) file://不用交换 MiRH i<g0
break; \TMRS(
SortUtil.swap(queue,j,k); <S$y=>.9
k = j; aqzvT5*8%
} w5|@vB/pj
} '2[ _U&e
private void fixUp(int k) { ^"buF\3L
while (k > 1) { Bl`e+&b
int j = k >> 1; 6w1:3~a
if (queue[j]>queue[k]) SmR*b2U
break; [c86b
SortUtil.swap(queue,j,k); bMSF-lQ
k = j; ui 2RTAb
} GMNf#;x
} %< j=&
kI[EG<N1k
} bjT0Fi0-
K=(&iq!VO
} }|SVt`n
STOE=TC>
SortUtil： Q^39Wk@
Be]o2N;J
package org.rut.util.algorithm; GtGToI
:cC`wX$
import org.rut.util.algorithm.support.BubbleSort; {Z?!*Ow
import org.rut.util.algorithm.support.HeapSort; z0Zl'
import org.rut.util.algorithm.support.ImprovedMergeSort; R2J3R5S=[
import org.rut.util.algorithm.support.ImprovedQuickSort; ~Q%QA._R?
import org.rut.util.algorithm.support.InsertSort; R*&3i$S
import org.rut.util.algorithm.support.MergeSort; ;QEGr|(
import org.rut.util.algorithm.support.QuickSort; -5>g 0o2
import org.rut.util.algorithm.support.SelectionSort; T@vVff
import org.rut.util.algorithm.support.ShellSort; uo%O\}#u9
\pPq]k
/** t]&n_]`{.
* @author treeroot ^9{ 2
* @since 2006-2-2 KPO((G0&
* @version 1.0 lJYv2EZ
*/ \uPT-M*
public class SortUtil { 6|jE3rHw
public final static int INSERT = 1; 3t_5Xacj
public final static int BUBBLE = 2; X*Q7Yu
public final static int SELECTION = 3; HE,wEKp
public final static int SHELL = 4; A|a\pL`@
public final static int QUICK = 5; >=Rb:#UM
public final static int IMPROVED_QUICK = 6; jgMWjM6.
public final static int MERGE = 7; ]g)%yuox9F
public final static int IMPROVED_MERGE = 8; ovfw_
public final static int HEAP = 9; \@F{Q-
|ITg-t
public static void sort(int[] data) { UNAuF8>K
sort(data, IMPROVED_QUICK); ?t%5/
} ^|\?vA
private static String[] name={ &WRoNc
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {MEU|9@ Y
}; d[Fsp7U}
'V>+G>U
private static Sort[] impl=new Sort[]{ d z\b]H]
new InsertSort(), Wex4>J<`/
new BubbleSort(), ypifXO;m7
new SelectionSort(), iH$N HfH
new ShellSort(), Uis P 8/k
new QuickSort(), X>B/DT
new ImprovedQuickSort(), Ebk@x=E
new MergeSort(), pucHB<R@bL
new ImprovedMergeSort(), V\xQM;
new HeapSort() p,0 \NUC
}; 7yj2we
v m$v[
public static String toString(int algorithm){ zld>o3K}
return name[algorithm-1]; 2>r.[
} @6Mo_4)O
r\1*N.O3|O
public static void sort(int[] data, int algorithm) { tw(2V$J
impl[algorithm-1].sort(data); a3)#tt=rA
} j>:T)zhyY
@]7\.>)
public static interface Sort { GkO6r'MVE
public void sort(int[] data); L7b{H22
} BA5= D>T-
y7Ub~qU
public static void swap(int[] data, int i, int j) { Xg)yz~Ug
int temp = data; }B.C#Y$@
data = data[j]; j)0R*_-B[
data[j] = temp; 2U+&F'&Q
} 0jS/U|0
} 3_>1j