[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; #5^OO ou|
} fQ.S ,lMe
int i1=l; 7N5M=f.DS(
int i2=mid+1; +|<bb8%
for(int cur=l;cur<=r;cur++){ -)&lsFF
if(i1==mid+1) G&Yo2aADR
data[cur]=temp[i2++]; } nIYNeP?D
else if(i2>r) L*p7|rq$"
data[cur]=temp[i1++]; I"8Z'<|/\q
else if(temp[i1] data[cur]=temp[i1++]; ~rq:I<5
else Xmb##:
data[cur]=temp[i2++]; Jp8,s%
} W?N+7_%'
} _TJkYz$
Z,-TMtM7
} VgY6M_V
q)@;8Z=_c
改进后的归并排序: c/F!cW{z^
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package org.rut.util.algorithm.support; vy7?]}MvV
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import org.rut.util.algorithm.SortUtil; &liFUP?
,DCUBD u&
/** vUL@i'0&o
* @author treeroot S@ y! 0,
* @since 2006-2-2 )Fqtb;W=
* @version 1.0 x a\~(B.
*/ F7=\*U
public class ImprovedMergeSort implements SortUtil.Sort { "*c&[ALw
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private static final int THRESHOLD = 10; z0YL,
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/* ;_ 1Rk&o!
* (non-Javadoc) R+U*]5~R
* U(~Nmo'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *y+K{ fM1
*/ /L]@k`.q@
public void sort(int[] data) { .345%j
int[] temp=new int[data.length]; KAT"!b
mergeSort(data,temp,0,data.length-1); =:TQ_>$Nc2
} <h~uGBS"
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private void mergeSort(int[] data, int[] temp, int l, int r) { MP )nQ
int i, j, k; r'|ei,
int mid = (l + r) / 2; wXYT(R
if (l == r) !WB3%E,I
return; >*|Eyv_
if ((mid - l) >= THRESHOLD) .7Pp'-hK
mergeSort(data, temp, l, mid); DU5rB\!.~
else ^|!\IzDp
insertSort(data, l, mid - l + 1); e-xT.RnQ
if ((r - mid) > THRESHOLD) AXo)(\
mergeSort(data, temp, mid + 1, r); @P=n{-pIW
else ?H{?jJj$H
insertSort(data, mid + 1, r - mid); ds2xl7jg
:efDPNm5
for (i = l; i <= mid; i++) { Tjj27+y*\
temp = data; nxm*.&#p?
} k<o<!
for (j = 1; j <= r - mid; j++) { >RiU/L
temp[r - j + 1] = data[j + mid]; ~X;sa,)L1+
} -l"8L;`
int a = temp[l]; xi.QHKBZaH
int b = temp[r]; 2@&"*1(Xu
for (i = l, j = r, k = l; k <= r; k++) { 0'zjPE#
if (a < b) { ~PN[ #e]
data[k] = temp[i++]; idS+&:'
a = temp; )Dcee@/7S
} else { 5mZ9rLn
data[k] = temp[j--]; CWD $\KG
b = temp[j]; sI4 FgO
} )%: W;H
} kWbY&]ZO
} (5RZLRn
)R@Y$*fm
/** )1)&fN41i#
* @param data IJ{VCzi
* @param l Z#GR)jb+
* @param i \x_$Pu
*/ {PL,3EBG
private void insertSort(int[] data, int start, int len) { y}W*P#BDO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Kc3/*eu;
} ;~}!P7z
} k$,y1hH;f8
} `y1,VY
} @d^MaXp_P
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堆排序： E_xk8X~
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package org.rut.util.algorithm.support; |A H@W#7j
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import org.rut.util.algorithm.SortUtil; GlT/JZ9
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/** <1U *{y
* @author treeroot X(>aW*q
* @since 2006-2-2 (g tOYEqx
* @version 1.0 MR* %lZpB
*/ (Q|Y*yI
public class HeapSort implements SortUtil.Sort{ woU3WS0
r6+IJxUd
/* (non-Javadoc) 8PGuZw<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;s-fYS6(>{
*/ !Ome;gS)
public void sort(int[] data) { y8|}bd<Sr
MaxHeap h=new MaxHeap(); iz`ys.Fu
h.init(data); Lo9 \[4FP
for(int i=0;i h.remove(); h*mKS -TC
System.arraycopy(h.queue,1,data,0,data.length); z9zo5Xc=
} lF$$~G
p"n3JV.~k+
private static class MaxHeap{ uF T5Z
c+<gc:#jy
void init(int[] data){ _b[Pk;8}j;
this.queue=new int[data.length+1]; \@7 4I7
for(int i=0;i queue[++size]=data; &KeD{M%
fixUp(size); ZD8E+]+
} b$B-LvHd1
} B=i%Z_r]w
^Ov+n1,)
private int size=0; T%2%*oa
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private int[] queue; &y7~
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public int get() { M[&p[P@
return queue[1]; 2AjP2
} x=44ITe1n[
PE+{<[n
public void remove() { U9//m=_
SortUtil.swap(queue,1,size--); A~wyn5:_
fixDown(1); \H/}|^+@
} ${7s"IX
file://fixdown ">R`S<W
private void fixDown(int k) { ]=%u\~AvL
int j; z`|E0~{-
while ((j = k << 1) <= size) { jx];=IC3tt
if (j < size %26amp;%26amp; queue[j] j++; %U&ztvR0C
if (queue[k]>queue[j]) file://不用交换 StMvz~
break; )B Xl|V,
SortUtil.swap(queue,j,k); 5R#:ALwX:
k = j; Now2ad&
} I]N!cEr;@-
} dcN4N5r
private void fixUp(int k) { Ns[.guWu-
while (k > 1) { %VgK::)r
int j = k >> 1; zm^5WH
if (queue[j]>queue[k]) z%/<|` 7
break; yc@:*Z
SortUtil.swap(queue,j,k); bKPjxN?!9
k = j; #r80FVwiD
} rj;~SC{
} q%Lw#f
M_F4I$V4
} DOWZhD
:J6FI6
} }+ TA+;
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SortUtil： LQa1p
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package org.rut.util.algorithm; S >\\n^SbT
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import org.rut.util.algorithm.support.BubbleSort; i8(n(
import org.rut.util.algorithm.support.HeapSort; IS }U2d,W
import org.rut.util.algorithm.support.ImprovedMergeSort; O:[@?l
import org.rut.util.algorithm.support.ImprovedQuickSort; VN<baK%]
import org.rut.util.algorithm.support.InsertSort; hKFB=U
import org.rut.util.algorithm.support.MergeSort; m\J"P'=
import org.rut.util.algorithm.support.QuickSort; 7e@Bkq0)
import org.rut.util.algorithm.support.SelectionSort; N+ei)-
import org.rut.util.algorithm.support.ShellSort; 6)#%36rP
T04&Tl'CT
/** 3- 4jSN\
* @author treeroot yI*h"?7T
* @since 2006-2-2 (:J U
* @version 1.0 G)y'exk
*/ 4 !M6RL8{
public class SortUtil { F}_Zh9/$(
public final static int INSERT = 1; 8HH\wu$$e
public final static int BUBBLE = 2; _jrkR n1"
public final static int SELECTION = 3; 4fdO Ow
public final static int SHELL = 4; I6F $@
public final static int QUICK = 5; R2nDK7j
public final static int IMPROVED_QUICK = 6; uWerC?da
public final static int MERGE = 7; ,koG*sn
public final static int IMPROVED_MERGE = 8; l`RFi)u~&
public final static int HEAP = 9; :<E\&6# oC
ZUeA&&{
public static void sort(int[] data) { y O?52YO
sort(data, IMPROVED_QUICK); Zq"wq[GCN
} bR|1*<
private static String[] name={ <fcw:Ae
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xT3l>9i
}; Dlu]4n[LB
/pnQKy.
private static Sort[] impl=new Sort[]{ zH?&FtO
new InsertSort(), ,DWC=:@X
new BubbleSort(), fm^)u"
new SelectionSort(), 38(|a5
new ShellSort(), :vy./83W
new QuickSort(), W|[k]A` 2
new ImprovedQuickSort(), G X>T~i\f8
new MergeSort(), 3`Q>s;DjIU
new ImprovedMergeSort(), ),+u>Os&
new HeapSort() kn7Qvk[+
}; e!*%U=[Q
D z5(v1I9A
public static String toString(int algorithm){ 3`\)Qm
return name[algorithm-1]; X+k`UM~
} v@E/?\k"
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public static void sort(int[] data, int algorithm) { v_ W03\
impl[algorithm-1].sort(data); Y@M l}43
} rlVo}kc7:
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public static interface Sort { Ol. rjz9
public void sort(int[] data); G,b1u"
} e.^Y4(
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public static void swap(int[] data, int i, int j) { $ *^E
int temp = data; 'l3K*lck
data = data[j]; x<e-%HB*-
data[j] = temp; (Qys`D
} Y=N; Bj
} <E&"]