[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; "'/+}xM"5
} aj=-^iGG
int i1=l; BkY#wJ'
int i2=mid+1; h iK}&
for(int cur=l;cur<=r;cur++){ P@%L.y B
if(i1==mid+1) jy_4W!4a
data[cur]=temp[i2++]; :Ys ;)W+R
else if(i2>r) X":2o|R
data[cur]=temp[i1++]; KTwP.!<v
else if(temp[i1] data[cur]=temp[i1++]; GkI{7GD:z
else cob??|,\m
data[cur]=temp[i2++]; Vv+ oq5hf
} 8k+k\V{
} `b%^_@Fb
#K iqV6E
} K@Xj)
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改进后的归并排序: Wtp=1
#%L_wJB-
package org.rut.util.algorithm.support; o/[Ks;l
1QnaZhu'
import org.rut.util.algorithm.SortUtil; ):A.A,skf
O[z6W.
/** ` k(Q:
* @author treeroot ",#Ug"|2
* @since 2006-2-2 vZs~=nfi#|
* @version 1.0 jVHS1Vsei
*/ _>r(T4}]
public class ImprovedMergeSort implements SortUtil.Sort { jhBfy|Ftu
*pABdP+
private static final int THRESHOLD = 10; Z`|\%D%
(cV1Pmn
/* -Owb@Nw
* (non-Javadoc) P# U|
* lHHx D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) px(~ZZB"
*/ N/<c;"o
public void sort(int[] data) { _H-Fm$Q
int[] temp=new int[data.length]; e2g`T{6M
mergeSort(data,temp,0,data.length-1); 9[lk=1.qN
} ^NM>xIenf
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private void mergeSort(int[] data, int[] temp, int l, int r) { c%&*yR
int i, j, k; ZwiXeD+4
int mid = (l + r) / 2; <*P)"G
if (l == r) .ud&$-[a
return; xsNOjHk
if ((mid - l) >= THRESHOLD) 3JqGLR`z3
mergeSort(data, temp, l, mid); &PFq(4
else zAev@+.ld
insertSort(data, l, mid - l + 1); 91DevizXx
if ((r - mid) > THRESHOLD) WM4,\$
mergeSort(data, temp, mid + 1, r); m Ph=bG
else ^+gD;a|t
insertSort(data, mid + 1, r - mid); : #so"O
`-K[$V
for (i = l; i <= mid; i++) { y{~tMpo<
temp = data; I|;C}lfp
} W7{^/s5r
for (j = 1; j <= r - mid; j++) { I1s$\NZ~]
temp[r - j + 1] = data[j + mid]; lhf5[Rp
} l)'*jZ
int a = temp[l]; sE!g!ht
int b = temp[r]; u yE#EnsH
for (i = l, j = r, k = l; k <= r; k++) { {XD':2E
if (a < b) { D=Yr/qc?
data[k] = temp[i++]; rV?@Kgxi
a = temp; C)UU/4a;
} else { 0kw)-)=
data[k] = temp[j--]; 6$zd2N?
b = temp[j]; -3 "<znv
} ^g"p}zf L"
} Vi0D>4{+
} 7s;;2<k;_
7) af
/** a:4!z;2 |
* @param data i CB:p
* @param l 4Y4zBD=<
* @param i @RL'pKab9
*/ 7(P4KvkI
private void insertSort(int[] data, int start, int len) { ub+XgNO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G|||.B8
} pRUQMPn (
} 6z:/ma^
} 73SH[f[g
} {.DY\;Q
^+k= ;nl
堆排序： bqaj~:}@
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package org.rut.util.algorithm.support; 8U7dd[
Lr=^0
import org.rut.util.algorithm.SortUtil; )HvBceN
h-SKw=n
/** ;E>#qYC6
* @author treeroot LB9W.cA
* @since 2006-2-2 T21?~jS
* @version 1.0 `0MQL@B
*/ !|- U,
public class HeapSort implements SortUtil.Sort{ zJ:%iL@
xuVc1jJH
/* (non-Javadoc) 17 0r5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7#7|+%W0
*/ x"cB8bZ!$
public void sort(int[] data) { IYH4@v/#
MaxHeap h=new MaxHeap(); FJxb!-0&
h.init(data); t~44ub6GN`
for(int i=0;i h.remove(); EWv[Sp
System.arraycopy(h.queue,1,data,0,data.length); |WfL'_?$
} <=w!:
!4 lN[
private static class MaxHeap{ 4gWlSm)
Lw1[)Vk}E
void init(int[] data){ ]1W]
this.queue=new int[data.length+1]; "<%J^Z9G
for(int i=0;i queue[++size]=data; U6y`:G;.
fixUp(size); wfcR[
} 1?.NJ<)F
} 6':Egh[;
w ykaf
private int size=0; 6UL9+9[C
z<0/#OP'
private int[] queue; k`5K&
/<%L&
public int get() { SZ7; } r8
return queue[1]; K@ &;f(Y
} M-q5Jfm
rw0s$~'
public void remove() { .j=mT[N,I
SortUtil.swap(queue,1,size--); %Y5F@=>&
fixDown(1); f&RjvVP?s
} ^62I 5k/u
file://fixdown <U\8&Uv>
private void fixDown(int k) { NA`8 ^PZ
int j; g-NrxyTBlx
while ((j = k << 1) <= size) { _={mKKoHs
if (j < size %26amp;%26amp; queue[j] j++; i&DUlmt)f
if (queue[k]>queue[j]) file://不用交换 ,ei=w,O
break; T7O)
SortUtil.swap(queue,j,k); %=\*OIhl
k = j; e$JATA:j
} oL<5hN*D
} _#{qDG=
private void fixUp(int k) { XdOntP*a
while (k > 1) { WW!-,d{{@
int j = k >> 1; Mm9*$g!R
if (queue[j]>queue[k]) XV`8Vb
break; ;d]vAj
SortUtil.swap(queue,j,k); yF|+oTp
k = j; hJz]N$@W
} OK47Q{.gh
} Ai5+ ;8z+
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} -dfs8[i
GMoz$c6n_
} #CB Kt,
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SortUtil： <E^;RG
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package org.rut.util.algorithm; 9-24c
3a=\$x@
import org.rut.util.algorithm.support.BubbleSort; LX=v _}l J
import org.rut.util.algorithm.support.HeapSort; s~o\j/
import org.rut.util.algorithm.support.ImprovedMergeSort; 9|OOT[
import org.rut.util.algorithm.support.ImprovedQuickSort; nQa:t. rC
import org.rut.util.algorithm.support.InsertSort; YQD/vc~8G
import org.rut.util.algorithm.support.MergeSort; ~@[<y1g?nG
import org.rut.util.algorithm.support.QuickSort; @l5GBsLK
import org.rut.util.algorithm.support.SelectionSort; 9jNh%raG|
import org.rut.util.algorithm.support.ShellSort; R|wS*xd,
GJHJ?^%
/** f;Ijl0d@
* @author treeroot p1mAoVxR
* @since 2006-2-2 && PZ;
* @version 1.0 7 `c!
*/ YNKvR
public class SortUtil { y|3("&)"S
public final static int INSERT = 1; *O)i)["
public final static int BUBBLE = 2; iWW >]3Q
public final static int SELECTION = 3; /WK1(B:
public final static int SHELL = 4; UQ@szE
public final static int QUICK = 5; &0J8ICd=
public final static int IMPROVED_QUICK = 6; 3v`@**
public final static int MERGE = 7; \YF07L]qs-
public final static int IMPROVED_MERGE = 8; ,^eOwWV
public final static int HEAP = 9; ,pQ[e$u1
7m?fvKy
public static void sort(int[] data) { jtE'T}!d
sort(data, IMPROVED_QUICK); R4$(NNC+/
} &yOl}?u
private static String[] name={ T\:*+W37
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &Mt0Qa[
}; dNov= w
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private static Sort[] impl=new Sort[]{ x(~V7L>"i
new InsertSort(), Ap|g[J
new BubbleSort(), \(`C*d
new SelectionSort(), L&uPNcZ`-
new ShellSort(), _?$w8 S%
new QuickSort(), 0(&RmR
new ImprovedQuickSort(), a( N;|<
new MergeSort(), @uG/2'B(
new ImprovedMergeSort(), ej=}OH4
new HeapSort() b5f+q:?{
}; -mLu!32I<
roe_H>
public static String toString(int algorithm){ <yvo<R^30
return name[algorithm-1]; B[+b%a3
} u^WZsW
%|j`;gYV
public static void sort(int[] data, int algorithm) { MfKru,LSh
impl[algorithm-1].sort(data); P:1eWP
} 5~E{bW$
TB84}
public static interface Sort { QA)W(1
public void sort(int[] data); |8GLS4.]t
} .1ep8O<
#cb9g
public static void swap(int[] data, int i, int j) { wjT#D|soI
int temp = data; r/HG{XH`
data = data[j]; Ea0EG>Y
data[j] = temp; y$6EEp
} Y/pK
} 1YU?+K