[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; mC&=X6Q]
} .M,RFC
int i1=l; *D4hq=
int i2=mid+1; 0`.^MC?
for(int cur=l;cur<=r;cur++){ (Q[fS:U
if(i1==mid+1) ,y4I[[
data[cur]=temp[i2++]; 5Dp#u
else if(i2>r) a8u9aEB
data[cur]=temp[i1++]; xX3'bsN
else if(temp[i1] data[cur]=temp[i1++]; ELrsx{p:
else bn 6WjJ~Z+
data[cur]=temp[i2++]; n%h^o
} DU%w1+u
} i| \6JpNA:
_(J&aY\
} s?8<50s
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改进后的归并排序: (%iRaw7hp
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package org.rut.util.algorithm.support; ^@P1 JNe
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import org.rut.util.algorithm.SortUtil; AV 8n(
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/** [{4MR%--
* @author treeroot 8x`.26p
* @since 2006-2-2 \ w3]5gJZ
* @version 1.0 l4T7'U>`
*/ 2|\A7.
public class ImprovedMergeSort implements SortUtil.Sort { _%'},Xd.z
<Q|d&vDVfV
private static final int THRESHOLD = 10; e\O/H<
(F7(^.MG
/* R+gz<H.Q
* (non-Javadoc) hF2IW{=!
* <2C7<7{7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kn+S,1r
*/ !4]9!<.k
public void sort(int[] data) { NvM*h%ChM
int[] temp=new int[data.length]; </uOe.l>Q
mergeSort(data,temp,0,data.length-1); :Hxv6
} MX@IHc
keRE==(D
private void mergeSort(int[] data, int[] temp, int l, int r) { ~>9_(L
int i, j, k; L(GjZAP
int mid = (l + r) / 2; RN=` -*E1
if (l == r) 3D?sL!W
return; 8Sz})UZ
if ((mid - l) >= THRESHOLD) 9Fn\FYUq
mergeSort(data, temp, l, mid); );-~j
else \EseGgd21
insertSort(data, l, mid - l + 1); |bgo;J/
if ((r - mid) > THRESHOLD) ">?vir^
mergeSort(data, temp, mid + 1, r); :[;hu}!&
else s+tGFjq
insertSort(data, mid + 1, r - mid); -G6U$
iR"N13
for (i = l; i <= mid; i++) { e<r,&U$
temp = data; Q1@A2+ c
} vq34/c^
for (j = 1; j <= r - mid; j++) { ftH:r_"O#
temp[r - j + 1] = data[j + mid]; B=|cS;bM$3
} }1IpON
int a = temp[l]; q+,Q<2J
int b = temp[r]; YuB+k^
for (i = l, j = r, k = l; k <= r; k++) { V)}rEX
if (a < b) { kQ]$%Lk[
data[k] = temp[i++]; s(W|f|R
a = temp; +>JjvYx}\
} else { # W"=ry3{
data[k] = temp[j--]; fFQ|T:vm
b = temp[j]; b+Br=Fv"T
} 4`,j=3
} 47J5oPT2'
} :6%Z]tt
%D *OO{
/** dO%W+K
* @param data >rvQw63\
* @param l W^"AU;^V56
* @param i 4>J
*/ H/}]FmjN
private void insertSort(int[] data, int start, int len) { W%\C_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kZ"BBJ6w
} |fo0
} n?V+dC=F}
} XC+A_"w)
} R4-~jgzx
G}p\8Q}'
堆排序： }\C-} Q
vx4+QQYP
package org.rut.util.algorithm.support; =JmT:enV
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import org.rut.util.algorithm.SortUtil; CD8}I85K
yq$,,#XDD=
/** --DoB=5%8
* @author treeroot ]LM-@G+Jz
* @since 2006-2-2 A@Dw<.&_I
* @version 1.0 7VP32Eh[
*/ c_>f0i
public class HeapSort implements SortUtil.Sort{ A%^ILyU6c
+zs4a96[
/* (non-Javadoc) QPq7R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N;[>,0&z
*/ fj&i63?e
public void sort(int[] data) { a`0=AQ
MaxHeap h=new MaxHeap(); YX#-nyK
h.init(data); L31|\x]
for(int i=0;i h.remove(); /Ju;MeE9
System.arraycopy(h.queue,1,data,0,data.length); wm^J;<T[
} 3g6j?yYqb
)YqXRm
private static class MaxHeap{ ,\@O(; mF
[n/hkXa$\
void init(int[] data){ [ I/<_AT#
this.queue=new int[data.length+1]; *<!oHEwkN
for(int i=0;i queue[++size]=data; )Dz+X9;g+
fixUp(size); !3ctB3eJ
} ki)#d' }
} =xS+5(
&e8s65`
private int size=0; x|5k<CiA
ZGd!IghL
private int[] queue; 9rA=pH%<>B
-xP!"
public int get() { <=,6p>Eo[
return queue[1]; 71{p+3Z&
} JGQjw(Xs
@|tL8?
public void remove() { S)/_muP
SortUtil.swap(queue,1,size--); jfqopiSi
fixDown(1); @qHNE,K
} $O5UyKI
file://fixdown f1(+ bE%
private void fixDown(int k) { 9U%N@Dq`Z
int j; ^) s2$A:L
while ((j = k << 1) <= size) { |*0<M(YXN
if (j < size %26amp;%26amp; queue[j] j++; k{Aj^O3gD
if (queue[k]>queue[j]) file://不用交换 j ku}QM^
break; pLzk
SortUtil.swap(queue,j,k); HC}YY2
k = j; @Rw!'T
} "^]cQ"A
} TU 1I} ,
private void fixUp(int k) { I2nhqJy^
while (k > 1) { Ck|8qUz-
int j = k >> 1; t0T"@t#c
if (queue[j]>queue[k]) 8M`#pN^
break; e[#j.|m
SortUtil.swap(queue,j,k); ok4@N @
k = j; ]]wA[c~G
} 1[vi.
} |1>*;\o-
jav#f{'
} h^o{@/2
aqc?pqM
} UQI]>#_/v
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SortUtil： iS<I0\D
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package org.rut.util.algorithm; DY?Kfvef
X]dwX%:Z!j
import org.rut.util.algorithm.support.BubbleSort; '4#}e[e
import org.rut.util.algorithm.support.HeapSort; `6xkf&Kt
import org.rut.util.algorithm.support.ImprovedMergeSort; TTTPxO,
import org.rut.util.algorithm.support.ImprovedQuickSort; xsMBC
import org.rut.util.algorithm.support.InsertSort; mA=i)Ga
import org.rut.util.algorithm.support.MergeSort; Ch3jxgQY
import org.rut.util.algorithm.support.QuickSort; OUNd@o
import org.rut.util.algorithm.support.SelectionSort; `p;I}
import org.rut.util.algorithm.support.ShellSort; [a wjio
SrK)t.oK
/** p ObX42
* @author treeroot 9B7^lR
* @since 2006-2-2 :FTMmW,>'
* @version 1.0 Rw:*'1
*/ C .~+*"Vw
public class SortUtil { ktpaU,%
public final static int INSERT = 1; +P`*kj-P\
public final static int BUBBLE = 2; _`:1M2=
public final static int SELECTION = 3; J:zU,IIJ
public final static int SHELL = 4; ~"kb7Fxp
public final static int QUICK = 5; < RH UH)I
public final static int IMPROVED_QUICK = 6; @-!}BUs?
public final static int MERGE = 7; aD$v2)RR
public final static int IMPROVED_MERGE = 8; !74S
public final static int HEAP = 9; 4QIX19{"
8Hn|cf0
public static void sort(int[] data) { PU^l.
sort(data, IMPROVED_QUICK); y3o25}"
} zp%Cr.)$
private static String[] name={ >^*+iEe
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m1Mt#@,$
}; Pf\D-1gi
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private static Sort[] impl=new Sort[]{ 283F)T\Rv
new InsertSort(), +2&@x=xy
new BubbleSort(), }%_ b$
new SelectionSort(), NP/Gn6fr
new ShellSort(), )6D,d5<
new QuickSort(), A"G 1^8wvX
new ImprovedQuickSort(), "Pu!dJ5[]
new MergeSort(), B=^)Ub5'
new ImprovedMergeSort(), m;GbLncA
new HeapSort() [k;\SXDZo
}; vPTM
%~2YE
public static String toString(int algorithm){ ASk|A!
return name[algorithm-1]; EkjN{$*
} J:V6
1Y7Eajt-5
public static void sort(int[] data, int algorithm) { iiS-9>]/
impl[algorithm-1].sort(data); )quM4=u'
} IpcNuZo9&
yl7&5)b#9
public static interface Sort { W"}M1o
public void sort(int[] data); lTV'J?8!-a
} S/e2P|}
mUdOX7$c>
public static void swap(int[] data, int i, int j) { 10q'Z}34
int temp = data; hPUYyjXPB
data = data[j]; ]v]qChZHd
data[j] = temp; Of[XKFn_
} 5ft`zf
} ;h*K}U