[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; 181P;R=}<
} t`AD9 H"\!
int i1=l; N]duv~JS
int i2=mid+1; CqoL5qt
for(int cur=l;cur<=r;cur++){ J.<m@\U
if(i1==mid+1) j- A|\:
data[cur]=temp[i2++]; f_7p.H6\
else if(i2>r) `&_qK~&/X
data[cur]=temp[i1++]; 073(xAkL{
else if(temp[i1] data[cur]=temp[i1++]; %Y@3)
else 8^{BuUA
data[cur]=temp[i2++]; 7v-C-u[E`
} Lg^m?~{
} (/Ubw4unI
g@QpqrT
} h2q]!01XP
5?b9[o+D
改进后的归并排序: ; H3kb +
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package org.rut.util.algorithm.support; /$n${M5!
8X%;29tow
import org.rut.util.algorithm.SortUtil; $\bH5|Hk]
@:[/uqL
/** U0rz 4fxc
* @author treeroot &^<94l
* @since 2006-2-2 I$Z"o9"
* @version 1.0 +|.#<]GA
*/ iJYr?3nw;
public class ImprovedMergeSort implements SortUtil.Sort { F JzjS;
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private static final int THRESHOLD = 10; t3M/ThIE
, ?%`Ky/
/* TX>;2S3q
* (non-Javadoc) b &JPLUr
* gFKQm(0g2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VYF4q9
*/ p;@PfhEz)
public void sort(int[] data) { rN}^^9
int[] temp=new int[data.length]; O^f@ g l
mergeSort(data,temp,0,data.length-1); TC2aD&cw{
} yqK82z5U*R
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private void mergeSort(int[] data, int[] temp, int l, int r) { 3]!(^N>V
int i, j, k; r[gV`khka
int mid = (l + r) / 2; .,c8cq?
if (l == r) ;7hf'k
return; !yxb<
if ((mid - l) >= THRESHOLD) a%AU9?/q#
mergeSort(data, temp, l, mid); C{c (K!
else :70oO}0m.
insertSort(data, l, mid - l + 1); u4S3NLG)
if ((r - mid) > THRESHOLD) dlWw=^
mergeSort(data, temp, mid + 1, r); D1w_Vpz
else :>,d$f^tqE
insertSort(data, mid + 1, r - mid); M6e"4Gh
H1l'\
for (i = l; i <= mid; i++) { os2yiF",
temp = data; u%|VmM>
} X)yTx8v4
for (j = 1; j <= r - mid; j++) { S&VN</p
temp[r - j + 1] = data[j + mid]; ]\jhtC=2
} J@Li*Ypo
int a = temp[l]; q)P<lKi
int b = temp[r]; P`"dj@1'
for (i = l, j = r, k = l; k <= r; k++) { 9@h>_1RJz
if (a < b) { C}!$'C|
data[k] = temp[i++]; ^)SvH
a = temp; Z?GC+hG`
} else { aqMZ%~7
data[k] = temp[j--]; {ng
b = temp[j]; >uQ!B/C!
} 9u:MF0:W
} z` sH
} l/TH"z(
We" "/X
/** wHAh6lm
* @param data 'n=FBu^
* @param l bDr'W
* @param i D`LwW` 9
*/ rz3&khi
private void insertSort(int[] data, int start, int len) { A1:Fe9q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p0@iGyd
} rf9RG!
} i P/I% D
} *kDXx&7B$
} uZqo"
v.\&gn(
堆排序： ]$z~;\T
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package org.rut.util.algorithm.support; ]AN)M>
] $%{nj<
import org.rut.util.algorithm.SortUtil; s#d>yx_b
E=LaPjEIj
/** bT8BJY%+
* @author treeroot HkQ2G}<
* @since 2006-2-2 p}j{<y
* @version 1.0 +oyc9PoXF
*/ ;B7>/q;g
public class HeapSort implements SortUtil.Sort{ Y(&phv&
p>MX}^6
/* (non-Javadoc) !D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'dx4L }d
*/ H\O|Y@uVr
public void sort(int[] data) { wngxVhu8Ld
MaxHeap h=new MaxHeap(); VB[R!S=
h.init(data); *{C)o0D
for(int i=0;i h.remove(); Q,s,EooIx
System.arraycopy(h.queue,1,data,0,data.length); <H$CCo
} ']qC,;2
MY0Wr%@#0
private static class MaxHeap{ KYlWV<sR
5uu{f&?u)
void init(int[] data){ +8~S28"Wg3
this.queue=new int[data.length+1]; R z[-
for(int i=0;i queue[++size]=data; ~M <4HC
fixUp(size); 7C&`i}/t
} #!<x|N?_<
} u'=#~'6
SK-|O9Ki
private int size=0; q6osRK*20
K7CiICe
private int[] queue; PZ"xW0"-
%.Mtn%:I*
public int get() { 0ai4%=d-
return queue[1]; {(t (}-:Z
} S;CT:kG6Y{
,,@_r&f:
public void remove() { +|o-lb
SortUtil.swap(queue,1,size--); of(Nq@
fixDown(1); [TNYPA>{
} [t ^|l?
file://fixdown `5>IvrzXrK
private void fixDown(int k) { XbHcd8N T
int j; Bw{W-&$o
while ((j = k << 1) <= size) { E6n;_{Se/S
if (j < size %26amp;%26amp; queue[j] j++; <@Ew-JU
if (queue[k]>queue[j]) file://不用交换 ?lbX.+
break; }}ogdq
SortUtil.swap(queue,j,k); *aTM3k)Zs
k = j; >+8mq]8^
} Q>X ;7nt0
} Phx/9Kk
private void fixUp(int k) { a8dR.
while (k > 1) { ."3 J;j
int j = k >> 1; 5|AZ/!rb
if (queue[j]>queue[k]) Ju:=-5r"'
break; dAga(<K
SortUtil.swap(queue,j,k); 89WuxCFS
k = j; jkfI,T
} 2wu 5`Z[E
} m@jOIt!<
+L_.XToq-
} &npf %Eub
CNP?i(Rk
} q.MM|;_u`
!&#CEF@J
SortUtil： xv1$,|^ts
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package org.rut.util.algorithm; `5x,N%9{
-'ZP_$sA
import org.rut.util.algorithm.support.BubbleSort; |QHWX^pO
import org.rut.util.algorithm.support.HeapSort; Q,jlKgB5:
import org.rut.util.algorithm.support.ImprovedMergeSort; !3Pl]S~6!
import org.rut.util.algorithm.support.ImprovedQuickSort; /wIZ '
import org.rut.util.algorithm.support.InsertSort; sz}Nal$AC
import org.rut.util.algorithm.support.MergeSort; DNL TJrN
import org.rut.util.algorithm.support.QuickSort; z?V> ST
import org.rut.util.algorithm.support.SelectionSort; 4N*^%
import org.rut.util.algorithm.support.ShellSort; D:){T>
+!w?g/dV
/** #Xsby
* @author treeroot dU+1@_
* @since 2006-2-2 ,(lD5iN
* @version 1.0 bXtA4O
*/ K)^.96{/@
public class SortUtil { H#6J7\xcS
public final static int INSERT = 1; fDqlN`P@
public final static int BUBBLE = 2; smk0*m4
public final static int SELECTION = 3; Ot v{#bB$
public final static int SHELL = 4; 4;%=ohD:!
public final static int QUICK = 5; ))eR
public final static int IMPROVED_QUICK = 6; js2?t~E]
public final static int MERGE = 7; aIkxN&
public final static int IMPROVED_MERGE = 8; p%j@2U
public final static int HEAP = 9; _gU[FUBtJ
$BNn1C8[
public static void sort(int[] data) { bZa?h.IF
sort(data, IMPROVED_QUICK); ]jM D'vg^b
} KxiZx I
private static String[] name={ ;m;wSp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'd/A+W
}; ;r8,Wx@f1C
ZVda0lex&
private static Sort[] impl=new Sort[]{ .llAiv
new InsertSort(), ]\Ez{MdAT
new BubbleSort(), 3`-[95w
new SelectionSort(), t$s)S>
new ShellSort(), qE(`@G
new QuickSort(), @ /c{gD
new ImprovedQuickSort(), `SOaQ|H
new MergeSort(), p61"a,Xc
new ImprovedMergeSort(), 5%+T~ E*
new HeapSort() (A"oMnjWd
}; vW~_+:),e
mb?yG:L=0b
public static String toString(int algorithm){ HaLEQ73
return name[algorithm-1]; A7ck-9dT/L
} 60QElJ9D
%#|S
public static void sort(int[] data, int algorithm) { idz6m]{~yT
impl[algorithm-1].sort(data); BXm{x6\
} Xa%Z0%{
hydn" 9;
public static interface Sort { -@AGQ+e
public void sort(int[] data); 6`%}s3Xq
} r`6XF
8CMI\yk
public static void swap(int[] data, int i, int j) { QULrE+@
int temp = data; 4yjAi@ /2
data = data[j]; _3ZZ-=J:=*
data[j] = temp; 'L=g(
} >YPfk=0f0
} >oLM2VJ