[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; +e<P7}ZQ
} Fzh%#z0
int i1=l; 9vCn^G%B
int i2=mid+1; {=IK(H
for(int cur=l;cur<=r;cur++){ >`n0{:.1za
if(i1==mid+1) ##Z:/SU
data[cur]=temp[i2++]; 'cy35M
else if(i2>r) -'BJhi\Y]~
data[cur]=temp[i1++]; O7ceSz
else if(temp[i1] data[cur]=temp[i1++]; [Av87!kJ!X
else !vfjo[v
data[cur]=temp[i2++]; ySP1WK
} uljd)kLy4O
} Gv>,Ad ka
Sd' uXX@
} dm,7OQ
,$Qa]UN5Q
改进后的归并排序: QXishHk&
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package org.rut.util.algorithm.support; wfM$JYfI
@!'Pr$`
import org.rut.util.algorithm.SortUtil; c_}i(HQ
5!}xl9D
/** :y!e6
* @author treeroot 8wwqV{O7
* @since 2006-2-2 Yfk[mo
* @version 1.0 !cE>L~cza
*/ kLR4?tX!
public class ImprovedMergeSort implements SortUtil.Sort { 3m#v|52oj
\ lP c,8)
private static final int THRESHOLD = 10; oc?,8I[P5
6(sqS~D
/* yU\&\fD>j
* (non-Javadoc) \v9IbU*js
* ~-GgVi*I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u@}((V
*/ T=:O(R1*0
public void sort(int[] data) { \:8~na+(
int[] temp=new int[data.length]; /tc*jXB
mergeSort(data,temp,0,data.length-1); dn$1OhN8M
} p&B98c
&zlwV"W
private void mergeSort(int[] data, int[] temp, int l, int r) { d,iW#,
int i, j, k; ( Z\OqG
int mid = (l + r) / 2; 5,I'6$J
if (l == r) 'Z+w\0}@
return; %lbSV}V)
if ((mid - l) >= THRESHOLD) IKKd
mergeSort(data, temp, l, mid); L-^vlP)Vu
else 3^q,'!PfB
insertSort(data, l, mid - l + 1); 4} 'Xrg
if ((r - mid) > THRESHOLD) O;ZU{VY
mergeSort(data, temp, mid + 1, r); 7]d396%
else Yb%H9A
insertSort(data, mid + 1, r - mid); j*x8K,fN
b9)%,3-
for (i = l; i <= mid; i++) { UAnq|NJO
temp = data; -_ .f&l8
} bRJYw6oA<
for (j = 1; j <= r - mid; j++) { GbwcbfH
temp[r - j + 1] = data[j + mid]; ^6#FqK+{u
} dI5Z*"`R9
int a = temp[l]; YM 0f_G=
int b = temp[r]; ?Vb=W)Es
for (i = l, j = r, k = l; k <= r; k++) { 1}tZ,w>
if (a < b) { yAU[A
data[k] = temp[i++]; |rH;}t|un
a = temp; :t?9$ dL
} else { -. L)-%wIV
data[k] = temp[j--]; chQt8Ar3
b = temp[j]; S6h=} V)
} e-,U@_B
} xM9EO(u
} F}DdErd!f
>J[g)$,
/** >"f,'S5*
* @param data BXO(B'1)]
* @param l VE& ?Zd~
* @param i >{~W"
*/ /4YXx|V
private void insertSort(int[] data, int start, int len) { 24:;vcb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [g]ks
} eQx9Vnb
} @(JcM=
} iH#~eg
} VFT G3,kI
+&jWM-T"-
堆排序： u ?7(A%
H;k;%Zg;
package org.rut.util.algorithm.support; QN9$n%Z
l:a+o gm3
import org.rut.util.algorithm.SortUtil; miCt)Qd
k sJz44
/** )@ZJ3l.
* @author treeroot ;j-@ $j
* @since 2006-2-2 U/>f" F
* @version 1.0 R@5jEf
*/ T3[\;ib}
public class HeapSort implements SortUtil.Sort{ +hpXMO%?
lJ3/^Htn
/* (non-Javadoc) 6i(V+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MX|CL{H
*/ {q~Bss{z
public void sort(int[] data) { )UI$s"
MaxHeap h=new MaxHeap(); xgrk>Fb|R
h.init(data); C?#if;c
for(int i=0;i h.remove(); 30*^ERO
System.arraycopy(h.queue,1,data,0,data.length); /,"Z^=
} $JypVA(CX
p^&' C_?
private static class MaxHeap{ Cfyas'
f-y4V}
void init(int[] data){ -OB72!sKU
this.queue=new int[data.length+1]; tV9W4`Z2q
for(int i=0;i queue[++size]=data; #]vq <Y
fixUp(size); *DLv$/(0
} p>Ju)o
} x +!<_p
tv+q~TFB=Z
private int size=0; @zEEX9U
Y$--Hp4
private int[] queue; z_*]joL
JS642T
public int get() { e!l!T@ pf
return queue[1]; aa_&WHXkt
} hQ i[7r($8
2xZg, \
public void remove() { t^&:45~Q
SortUtil.swap(queue,1,size--); Oo`P +S#
fixDown(1); n]}+ :
} i92{N$*x
file://fixdown kI<C\*N
private void fixDown(int k) { ^LfCLI9Z
int j; ~2 T_)l?
while ((j = k << 1) <= size) { G-G!c2o
if (j < size %26amp;%26amp; queue[j] j++; Z_iu^Q
if (queue[k]>queue[j]) file://不用交换 iv?'&IUfK
break; i6kW"5t
SortUtil.swap(queue,j,k); iVd*62$@$
k = j; yrdJX
} +o?.<[>!GR
} h.%VWsAO7
private void fixUp(int k) { @\i6m]\X
while (k > 1) { HyiuU`
int j = k >> 1; VD,F?L!
if (queue[j]>queue[k]) 6.6~w\fR8
break; yH|ucN~k5S
SortUtil.swap(queue,j,k); T73oW/.0X?
k = j; r%xp^j}
} h76#HUBr!
} f/Grem
NO +j
} Uey.@2Q
W:3u$LTf*f
} b5_A*-s$M
4adCMfP7.
SortUtil： *GfGyOS(
'<!/\Jz9l
package org.rut.util.algorithm; V8NJ0fF
76c4~IG#
import org.rut.util.algorithm.support.BubbleSort; +AZ=nMgW
import org.rut.util.algorithm.support.HeapSort; ,M>W)TSH
import org.rut.util.algorithm.support.ImprovedMergeSort; H'<9;bD -
import org.rut.util.algorithm.support.ImprovedQuickSort; 3rZFN^
import org.rut.util.algorithm.support.InsertSort; Fw+JhIVP
import org.rut.util.algorithm.support.MergeSort; hAOXOj1
import org.rut.util.algorithm.support.QuickSort; +IuV8XT2(
import org.rut.util.algorithm.support.SelectionSort; k!xi (l<C
import org.rut.util.algorithm.support.ShellSort; zek\AQN
,4NvD2Y
/** ba%[!
* @author treeroot elWN-~
* @since 2006-2-2 6[69|&
* @version 1.0 394u']M
*/ A~ '2ki5$g
public class SortUtil { `kwyF27v]
public final static int INSERT = 1; *na7/ysT<
public final static int BUBBLE = 2; mppBc-#EYr
public final static int SELECTION = 3; Ufv{6"sH
public final static int SHELL = 4; ";`ddN3
public final static int QUICK = 5; {uM0J$P:
public final static int IMPROVED_QUICK = 6; E;$t|~#
public final static int MERGE = 7; Ufq"_^4
public final static int IMPROVED_MERGE = 8; !#rZeDmw
public final static int HEAP = 9; ~`#.ZMO
)FMpfC>An
public static void sort(int[] data) { 3a:(\:?z
sort(data, IMPROVED_QUICK); [=Np.:Y%
} ({m["d
private static String[] name={ b/"gkFe#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kmy?`P10(z
}; GL@s~_;T6
0+/L?J3
private static Sort[] impl=new Sort[]{ <z#r3J
new InsertSort(), C0 .Xp
new BubbleSort(), c500:OSB
new SelectionSort(), [dk|lkj@u\
new ShellSort(), B6 x5E
new QuickSort(), {AO3o<-h
new ImprovedQuickSort(), |QAmN>7U
new MergeSort(), f4/!iiS}r
new ImprovedMergeSort(), }.NR+:0
new HeapSort() 18}L89S>
}; bsr
(^qcX;-
public static String toString(int algorithm){ *7ap[YXZ\w
return name[algorithm-1]; #E^%h
} JGn@)!$+/
iFF/[P
public static void sort(int[] data, int algorithm) { &VR<'^>
impl[algorithm-1].sort(data); +P~zn=
} To}L%)
U(3LeS;mr
public static interface Sort { 2YuaPq/
public void sort(int[] data); 2EG"xA5%
} bkmX@+Pe
@`%.\_
public static void swap(int[] data, int i, int j) { ksu:RJ-
int temp = data; /iy2j8:z
data = data[j]; /J/r62
data[j] = temp; HZ[&ZNTa
} twf;{lZ(
} @*is]d+Ya