[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; xHo&[{
} z;Q<F
int i1=l; Ai"-w"
int i2=mid+1; X!tf#tl
for(int cur=l;cur<=r;cur++){ 0F:1\9f5
if(i1==mid+1) xW_yLbE
data[cur]=temp[i2++]; =IjQ40W
else if(i2>r) _&#S@aGw
data[cur]=temp[i1++]; @=Fi7M
else if(temp[i1] data[cur]=temp[i1++]; U@F)2?
else RJ4. kt
data[cur]=temp[i2++]; }uY!(4Rw
} 6l\FIah@
} )]43R
qO@@8/l
} atF?OP|{,w
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改进后的归并排序: }{[mrG
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package org.rut.util.algorithm.support; A,gEM4
k`{7}zxS
import org.rut.util.algorithm.SortUtil; Wu1{[a|
*G5c|Y
/** XORk!m|
* @author treeroot 'gso'&Uaj
* @since 2006-2-2 ut2~rRiK
* @version 1.0 !j:`7PT\
*/ As&vFt P
public class ImprovedMergeSort implements SortUtil.Sort { OJAIaC\
o@bNpflb`
private static final int THRESHOLD = 10; qk/:A+
LiQgR 6j
/* xiblPF_n3
* (non-Javadoc) I=DxRgt
* zj{r^D$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3< Od0J
*/ g\SrO {*
public void sort(int[] data) { Z{6kWA3Kk
int[] temp=new int[data.length]; Cq)IayD@
mergeSort(data,temp,0,data.length-1); I@#;nyAj"
} tWeFEVg
5ExDB6Bx@y
private void mergeSort(int[] data, int[] temp, int l, int r) { SQ*k =4*r
int i, j, k; Q]/Uq~m C
int mid = (l + r) / 2; [U@;\V$
if (l == r) {LHR!~d}5f
return; IuF_M<d,
if ((mid - l) >= THRESHOLD) \!]hU%Un
mergeSort(data, temp, l, mid); mEyK1h1G@
else LUX*P7*B
insertSort(data, l, mid - l + 1); y !$alE
if ((r - mid) > THRESHOLD) ~@ jY[_
mergeSort(data, temp, mid + 1, r); EZ;"'4;W
else =3ioQZ^Vz
insertSort(data, mid + 1, r - mid); !~]<$WZV
Sq\(pfvo
for (i = l; i <= mid; i++) { 6z0@I*
temp = data; w;UqEC V
} 8lF\v/vN
for (j = 1; j <= r - mid; j++) { SP*fv`
temp[r - j + 1] = data[j + mid]; CIU1R;
} mrIh0B:`
int a = temp[l]; m%;D
int b = temp[r]; W14F
for (i = l, j = r, k = l; k <= r; k++) { ;5-r_D;9
if (a < b) { 5tjP6Z`!9`
data[k] = temp[i++]; RlT3Iz;
a = temp; b45|vX+j
} else { goat<\a
data[k] = temp[j--]; k>x&Ip8p
b = temp[j]; WQyLf;!Lz
} p'7*6bj1
} l3Njq^T
} DejA4XdW
h$eEn l}
/** yRp"jcD
* @param data toN^0F?Qm
* @param l ,p(<+6QZ
* @param i RrUBpqA
*/ qTZFPfyU
private void insertSort(int[] data, int start, int len) { !Z VU,b>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xGTP;NT_H
} kmzH'wktt
} lj+u@Z<xA
} Zo1,1O
} ]Q]W5WDe:
4DZ-bt'
堆排序： ]smkTo/
uqz]J$
package org.rut.util.algorithm.support; R.=}@oPb
c'/l,k
import org.rut.util.algorithm.SortUtil; N?Lb
rZ8`sIWQt
/** |rmg#;/D
* @author treeroot V#VN%{
* @since 2006-2-2 Xpzfm7CB/
* @version 1.0 ca+5=+X7
*/ df7wN#kO+
public class HeapSort implements SortUtil.Sort{ 9tF9T\jW
;a:[8Yi
/* (non-Javadoc) Eke5Nb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n:MdYA5,m
*/ boDt`2=
public void sort(int[] data) { 8M!:N(a
MaxHeap h=new MaxHeap(); *_>Lmm.yh
h.init(data); )"Ztlhs`#
for(int i=0;i h.remove(); D3|I:Xm
System.arraycopy(h.queue,1,data,0,data.length); p/+a=Yo
} ;!(<s,c#:
P.gb1$7<
private static class MaxHeap{ sQkhwMg
t!RiUZAo
void init(int[] data){ N7e"@Ic
this.queue=new int[data.length+1]; 1GzAG;UUo6
for(int i=0;i queue[++size]=data; k:7(D_
fixUp(size); -GxaV #{
} W6Y]N/v3>
} 21"1NJzP
|1j["u1
private int size=0; dAuJXGo
j]`PSl+w
private int[] queue; l\i)$=d&g
TYW&!sm
public int get() { EFz&N\2
return queue[1]; ]\|VpIg
} 0Vx.nUQ
%7|9sQ:
public void remove() { &Xf}8^T<V
SortUtil.swap(queue,1,size--); YPxM<Gfa8
fixDown(1); .mR8q+I6
} {;2PL^i
file://fixdown _bNzXF
private void fixDown(int k) { q.;u?,|E/
int j; GWfL
while ((j = k << 1) <= size) { v/_
if (j < size %26amp;%26amp; queue[j] j++; wRVUu)
if (queue[k]>queue[j]) file://不用交换 $` ""
break; nR*ryv
SortUtil.swap(queue,j,k); W)bLSL]`E
k = j; T:~vk.Or
} 7<*yS310
} ^~etm
private void fixUp(int k) { j:v@pzTD
while (k > 1) { ?{[ v+t#
int j = k >> 1; |!4K!_y
if (queue[j]>queue[k]) +{oG|r3L
break; p>huRp^w
SortUtil.swap(queue,j,k); (JOgy.5C~
k = j; iUN Ib
} " )1V]}+m
} K|[*t~59
H:V2[y8\
} GB=X5<;
a!v1M2>
} @J/K-.r
n"c[,k+R`U
SortUtil： H*PSR
WvY? +JXJ
package org.rut.util.algorithm; {ttysQ-
yd d7I&$
import org.rut.util.algorithm.support.BubbleSort; JkbQyn
import org.rut.util.algorithm.support.HeapSort; Wi)_H$KII
import org.rut.util.algorithm.support.ImprovedMergeSort; nWw":K<@Q_
import org.rut.util.algorithm.support.ImprovedQuickSort; + R~'7*EI
import org.rut.util.algorithm.support.InsertSort; ^'PWI{ O
import org.rut.util.algorithm.support.MergeSort; m+]K;}.}R
import org.rut.util.algorithm.support.QuickSort; NXrJfp
import org.rut.util.algorithm.support.SelectionSort; 3EPv"f^V
import org.rut.util.algorithm.support.ShellSort; ?Lk)gO^C
o6.^*%kM'
/** rC^WPW
* @author treeroot s Z].8.
* @since 2006-2-2 yPb"V
* @version 1.0 VY7[)
*/ Yi.N&&o
public class SortUtil { Pd_U7&w,5
public final static int INSERT = 1; [1Qo#w1
public final static int BUBBLE = 2; inMA:x}cF1
public final static int SELECTION = 3; fHx*e'eA
public final static int SHELL = 4; qm/22:&v5
public final static int QUICK = 5; <h0?tv]
public final static int IMPROVED_QUICK = 6; |ATvS2
public final static int MERGE = 7; EM(gmWHij
public final static int IMPROVED_MERGE = 8; YJT&{jYi
public final static int HEAP = 9; Z 2V.3
2K/4Rf0;
public static void sort(int[] data) { "#2a8#
sort(data, IMPROVED_QUICK); iu=7O
} KJ)k =mJ
private static String[] name={ K0|FY=#2y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ymhtX6]
}; 2} /aFR
V]lLw)
private static Sort[] impl=new Sort[]{ NJWA3zz
new InsertSort(), ];[}:f
new BubbleSort(), "o-zy'I
new SelectionSort(), ?]_$Dcmx
new ShellSort(), wd8l$*F*
new QuickSort(), -b9\=U[
new ImprovedQuickSort(), <KL,G};0pm
new MergeSort(), |4;Fd9q^m
new ImprovedMergeSort(), /[ 5gX^A
new HeapSort() ) j#`r/
}; l[0RgO*S
PR#exm&
public static String toString(int algorithm){ 9<6;Hr,>G
return name[algorithm-1]; {HltvO%8
} 'CM|@Zz%
Q4#m\KK;i9
public static void sort(int[] data, int algorithm) { ;"5&b!=t
impl[algorithm-1].sort(data); ?jv/TBZX4
} &R'c.
O`IQ(,yef
public static interface Sort { P^~yzI
public void sort(int[] data); _^Ubs>d=*
} NvceYKp:
JE"x
public static void swap(int[] data, int i, int j) { 5IGX5x
int temp = data; e:DCej^z
data = data[j]; t6"%3#s
data[j] = temp; %HhnSi1K
} l`lk-nb
} RB7tmJc