[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; zZ{(7Kfz
} _:?b-44
int i1=l; jMQ7^(9-
int i2=mid+1; teg[l-R"7z
for(int cur=l;cur<=r;cur++){ pDG>9P#mO
if(i1==mid+1) t[b@P<F
data[cur]=temp[i2++]; {DbWk>[DkG
else if(i2>r) iGsD!2
data[cur]=temp[i1++]; h v/+
else if(temp[i1] data[cur]=temp[i1++]; p$@l,4@{
else !jyy`q=
data[cur]=temp[i2++]; Rln@9muXA
} "!_,N@\t
} R'p- 4
P(Q}r7F~(
} 3"iJ/Hc}9
o.KE=zp&z
改进后的归并排序: m[6c{$A/w
tf?"AY4
package org.rut.util.algorithm.support; DO9_o9'
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import org.rut.util.algorithm.SortUtil; l08JL
BMovl4*5
/** nO .:f
* @author treeroot K.::P84m;
* @since 2006-2-2 3B[u2o>
* @version 1.0 r>x>aJ
*/ be:=-B7!
public class ImprovedMergeSort implements SortUtil.Sort { )dZ1$MC[
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private static final int THRESHOLD = 10; }}wZ
R'x^Y"
/* -)Y[t Z^*`
* (non-Javadoc) Dh B*k<S
* H(F9&6}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &=hkB9 ;
*/ uw9w{3]0f
public void sort(int[] data) { <l"rnM%
int[] temp=new int[data.length]; fIm=^}?fwK
mergeSort(data,temp,0,data.length-1); W3-g]#\?
} 9:]|TIPi
T,fDH!a
private void mergeSort(int[] data, int[] temp, int l, int r) { SyCa~M!}>
int i, j, k; 95hdQ<W
int mid = (l + r) / 2; IltU6=]"l
if (l == r) jK-usn
return; @sLB _f
if ((mid - l) >= THRESHOLD) K8g9IZ*lT
mergeSort(data, temp, l, mid); ]:F?k#c
else \4roM1&[
insertSort(data, l, mid - l + 1); u^]Z{K_B
if ((r - mid) > THRESHOLD) I=}pT50~9
mergeSort(data, temp, mid + 1, r); 1\ab3n
else )5U2-g#U
insertSort(data, mid + 1, r - mid); DYaOlT(rE
|n+ `t?L^
for (i = l; i <= mid; i++) { $JZ}=\n7
temp = data; !t+eJj
} @c^g<
for (j = 1; j <= r - mid; j++) { <;':'sW
temp[r - j + 1] = data[j + mid]; NM&R\GI
} &xMQ
int a = temp[l]; o C#W
int b = temp[r]; _Q6` Wp6m
for (i = l, j = r, k = l; k <= r; k++) { b<"LUM*;
if (a < b) { Jqgo\r%`
data[k] = temp[i++]; [gxH,=Pb
a = temp; N"&qy3F
} else { jv'q:uA^
data[k] = temp[j--]; %E`=c]!
b = temp[j]; Q"b62+03
} |FxTP&8~
} bd@1j`i
} HC/?o0
s.9_/cFWB
/** rWD*DmY@"
* @param data ^)0b= (.
* @param l +a!uS0fIJi
* @param i co [
*/ Onj)AJ9M0r
private void insertSort(int[] data, int start, int len) { mUjM5ceAXO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V[baGNe
} =Z}=nS?4
} ,1|0]:
} 8/`ij?gn
} <)ltvo(
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堆排序： 4'BZ+A,p
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package org.rut.util.algorithm.support; R1NwtnS
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import org.rut.util.algorithm.SortUtil; &1$|KbmV4
Y<9]7R(\;
/** UZb!tO2
* @author treeroot qhqqCVrsW
* @since 2006-2-2 YB3?Ftgw
* @version 1.0 _omz74
*/ Ul%D}(,
public class HeapSort implements SortUtil.Sort{ '(!U5j
;iTZzmB
/* (non-Javadoc) 2L|)uCb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wA?q/cw C
*/ -VO* P
public void sort(int[] data) { z{ MO~d9
MaxHeap h=new MaxHeap(); ewORb
h.init(data); .l}oxWWoS
for(int i=0;i h.remove(); Ki(
System.arraycopy(h.queue,1,data,0,data.length); (YKkJ
} '
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private static class MaxHeap{ QTT2P(Pz
GBo'=
void init(int[] data){ $3je+=ER
this.queue=new int[data.length+1]; FCA]zR1
for(int i=0;i queue[++size]=data; 2}jC%jR2
fixUp(size); xI(Y}>
} Yo;Mexo!
} l~c# X3E
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private int size=0; ]B>g~t5J
ERZWK
private int[] queue; 5;_&C=[
!R@s+5P)U
public int get() { 2JX@#vQ4
return queue[1]; D~LU3#n
} KG9FR*"
DfV'1s4y
public void remove() { >{@:p`*
SortUtil.swap(queue,1,size--); {u{8QKeC
fixDown(1); UTph(U#
} n06Jg+
file://fixdown B[B(=4EzMP
private void fixDown(int k) { mdy+ >e<
int j; ~ w,hJ `
while ((j = k << 1) <= size) { a0=>@?
if (j < size %26amp;%26amp; queue[j] j++; [[gfR'79{
if (queue[k]>queue[j]) file://不用交换 x3]y*6
break; O)?
SortUtil.swap(queue,j,k); hR(p{$-T
k = j; unN=yeut
} .BjnV%l7Id
} <Pg<F[eDM
private void fixUp(int k) { TDR2){I
while (k > 1) { (Q~(t
int j = k >> 1; 6*tbil_G+
if (queue[j]>queue[k]) &=`6- J
break; z)0%gd|
SortUtil.swap(queue,j,k); $mLiEsJ
k = j; MR-cOPn
} =VOl *
} c?XqSK`',Z
0|D l/1
} e=Teq~K
$ Ov#^wfA
} %^ g(2^
; 6*Ag#Z
SortUtil： CyEEE2cV
TATH,Sz:x
package org.rut.util.algorithm; 3P[u>xE
cu#s}*Ip
import org.rut.util.algorithm.support.BubbleSort; Ye"#tCOEG
import org.rut.util.algorithm.support.HeapSort; 5x1_rjP$|
import org.rut.util.algorithm.support.ImprovedMergeSort; Aa`'g0wmc
import org.rut.util.algorithm.support.ImprovedQuickSort; JTI 'W
import org.rut.util.algorithm.support.InsertSort; tDwj~{a~
import org.rut.util.algorithm.support.MergeSort; A.@Af+
import org.rut.util.algorithm.support.QuickSort; rJqRzF{|P6
import org.rut.util.algorithm.support.SelectionSort; 8jz[;.jP",
import org.rut.util.algorithm.support.ShellSort; F}dq~QCzw
$mZpX:7/u8
/** CY i{WV(:
* @author treeroot N_qKIc_R
* @since 2006-2-2 4,P!D3SH
* @version 1.0 &7m)K>E27
*/ Kt/Wd
public class SortUtil { ^":Dk5gl
public final static int INSERT = 1; +KKx\m*
public final static int BUBBLE = 2; K}1eQS&$a
public final static int SELECTION = 3; Sw^-@w=!U5
public final static int SHELL = 4; IQA<xqX
public final static int QUICK = 5; ;$>wuc'L
public final static int IMPROVED_QUICK = 6; ;_<K>r*
public final static int MERGE = 7; 4[^lE?+
public final static int IMPROVED_MERGE = 8; >W7IWhm3
public final static int HEAP = 9; Wk*t-
Zk#?.z}
public static void sort(int[] data) { g1zX^^nd,V
sort(data, IMPROVED_QUICK); v'W`\MKY)
} [*|QA9
private static String[] name={ H]JVv8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #Y'svn1H
}; 2*1FW v
D|rcSa.M
private static Sort[] impl=new Sort[]{ <"rckPv_H
new InsertSort(), &6}] v:
new BubbleSort(), i1JWdHt
new SelectionSort(), |nTZ/MXbw
new ShellSort(), Y\1XKAfB
new QuickSort(), ` "JslpN
new ImprovedQuickSort(), V- HO_GDo
new MergeSort(), KQ\d$fX
new ImprovedMergeSort(), TDnbX_xC<
new HeapSort() P2^((c
}; .ugQH<B
Yt% E,U~g
public static String toString(int algorithm){ ZUxlk+o9d
return name[algorithm-1]; !ii'hwFm$
} O)i]K`jk
</B5^}
public static void sort(int[] data, int algorithm) { Jb4A!g5C
impl[algorithm-1].sort(data); UZq1qn@+
} jQ[M4)>_k`
+HxL>\
public static interface Sort { OlI{VszR
public void sort(int[] data); eg vgi?y
} _$Hx:^p:
%B{NH~
public static void swap(int[] data, int i, int j) { &?@5G
int temp = data; wBK%=7
data = data[j]; uRu)iBd D
data[j] = temp; M$Of.
} )-4xI4
} b+`mh