[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; ?:8wDV
} "M`ehgCBr
int i1=l; c<T'_93
int i2=mid+1; VlLc[eVV
for(int cur=l;cur<=r;cur++){ !"dn!X
if(i1==mid+1) !Eof7LUE
data[cur]=temp[i2++]; <kY||
else if(i2>r) ,:G3Y )
data[cur]=temp[i1++]; kJy bA
else if(temp[i1] data[cur]=temp[i1++]; 71$MhPvd<
else i*q!|^M
data[cur]=temp[i2++]; c2$&pZ M
} q%^vx%aL\
} MZ/PXY
74hQ?Atw:
} $AI0&#NM
bM%c*_$F7
改进后的归并排序: lMcSe8LBQa
vW\|% @hW,
package org.rut.util.algorithm.support; [u=DAk?8
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import org.rut.util.algorithm.SortUtil; TAXl73j_CY
#_zd`s3k
/** Qey6E9eCA
* @author treeroot DJm/:td
* @since 2006-2-2 tG{?
* @version 1.0 Aj22t
*/ WecJ^{g>r{
public class ImprovedMergeSort implements SortUtil.Sort { *C0gpEf9S
CYxrKW l:'
private static final int THRESHOLD = 10; Rlq6I?S+
7+h*&f3>
/* wn$:L9"YN
* (non-Javadoc) _:tclBc8R
* c=-2c&=&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =XT'D@q~W
*/ wu2AhMGmw
public void sort(int[] data) { h/CF^0m"!
int[] temp=new int[data.length]; 0 CJ4]mYl
mergeSort(data,temp,0,data.length-1); ji &*0GJQ
} bhFAt1h
h0N*hx
private void mergeSort(int[] data, int[] temp, int l, int r) { JKFV7{%Gl
int i, j, k; ? 77ye
int mid = (l + r) / 2; @c8s<9I]
if (l == r) SwDUg}M~
return; {mlJE>~%
if ((mid - l) >= THRESHOLD) })l+-H"
mergeSort(data, temp, l, mid); yk5T"#'+
else >Kd(.r[Er
insertSort(data, l, mid - l + 1); (5"BKu1t
if ((r - mid) > THRESHOLD) cZ" Ut
mergeSort(data, temp, mid + 1, r); JMMsOA_]
else J{Z-4y
insertSort(data, mid + 1, r - mid); zn |=Q$81
wmNc)P4
for (i = l; i <= mid; i++) { Wu 71q=
temp = data; OGy/8B2c
} p,?8s%
for (j = 1; j <= r - mid; j++) { '9,14e6
temp[r - j + 1] = data[j + mid]; v!;E1
} ,]N!I%SI
int a = temp[l]; d E@R7yU@
int b = temp[r]; `;^%t
for (i = l, j = r, k = l; k <= r; k++) { @UO=)PxN3
if (a < b) { Z{ntF
data[k] = temp[i++]; Cf_Ik
a = temp; PAe2hJ
} else { zN\~v
data[k] = temp[j--]; NRS!Ox
b = temp[j]; @"~Mglgw
} %qzpt{'?<
} 7eh|5e$@
} mf26AIlkQ
y>S.B/d
/** F:/R'0
* @param data 5JbPB!5;
* @param l 'DQp
* @param i t[6g9e$
*/ ;+-$=l3[a
private void insertSort(int[] data, int start, int len) { ]|q\^k)JU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i\S } aCm
} [@}{sH(#Ta
} }lgqRg)F9[
} Av*R(d=`
} (BC3[R@/l
}9=\#Le~\
堆排序： O_f|R1G5z
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package org.rut.util.algorithm.support; `d=$9Pi
Z`xz|:D+
import org.rut.util.algorithm.SortUtil; PL8{|Q
F}Bc +i#]
/** iSxxy1R
* @author treeroot 'JEZ;9}
* @since 2006-2-2 TJ9,c2d+
* @version 1.0 _%s_w)
*/ B{ NKDkDH
public class HeapSort implements SortUtil.Sort{ FhB^E$r%
Vgs( feGs
/* (non-Javadoc) JF*JFOb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O0xL;@rBe
*/ x5m .MQ J
public void sort(int[] data) { r^P}xGGK
MaxHeap h=new MaxHeap(); "F+ 9xf&r
h.init(data); Jkt L|u:k
for(int i=0;i h.remove(); H^Xw<Z=
System.arraycopy(h.queue,1,data,0,data.length); DYH-5yX7
} ( $3j
'uUp1+
private static class MaxHeap{ v@k62@;
~?vm97l
void init(int[] data){ :~^ec|tp
this.queue=new int[data.length+1]; qy@gW@IU
for(int i=0;i queue[++size]=data; [E(DGt
fixUp(size); ?B %y)K
} 8\8uXOS
} gQ h0-Dnw
u+s#Fee I
private int size=0; L6j 5pI
$*%Ml+H-
private int[] queue; uLb- NxQ-
dUn8Xqj1
public int get() { o})4Jt1vj
return queue[1]; -!MDYj+U
} ew4IAF
@hm%0L
public void remove() { TE*$NxQ 2
SortUtil.swap(queue,1,size--); 0+8ThZ?n
fixDown(1); %_1~z[Dv
} 76)(G/
file://fixdown j:|60hDz^
private void fixDown(int k) { mf@YmKbp
int j; -3VxjycY
while ((j = k << 1) <= size) { | qHWM
if (j < size %26amp;%26amp; queue[j] j++; R*TCoEKO
if (queue[k]>queue[j]) file://不用交换 #'<I!G
break; h^>kjMM
SortUtil.swap(queue,j,k); xn@?CP`-y
k = j; v%&f00
} jjvm<;lv
} .,,?[TI
private void fixUp(int k) { 5%?La`C9[
while (k > 1) { P,iLqat
int j = k >> 1; Vw9^otJu
if (queue[j]>queue[k]) *@G4i
break; 5G){7]P+r"
SortUtil.swap(queue,j,k); *^c4q|G.-
k = j; [ZURs3q
} /^uvY
} Njq#@*>[p
2O9dU 5b
} ACl:~7;
\\hZlCV,
} M)EKS
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SortUtil： z}C#+VhQ`
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package org.rut.util.algorithm; NfR,m]
[X^JV/R
import org.rut.util.algorithm.support.BubbleSort; v.6"<nT2
import org.rut.util.algorithm.support.HeapSort; =]xNpX)
import org.rut.util.algorithm.support.ImprovedMergeSort; .1I];Cy0D
import org.rut.util.algorithm.support.ImprovedQuickSort; :`3b|u=KZ
import org.rut.util.algorithm.support.InsertSort; }jiqUBn%
import org.rut.util.algorithm.support.MergeSort; ADv a@P
import org.rut.util.algorithm.support.QuickSort; 6{azzk8
import org.rut.util.algorithm.support.SelectionSort; K^{`8E&A
import org.rut.util.algorithm.support.ShellSort; Yc?taL)
Z mi<Z
/** 83i%3[L
* @author treeroot W%Rh2l
* @since 2006-2-2 ~8pf.^,fi
* @version 1.0 QJdSNkc6
*/ AV d
public class SortUtil { @dCu]0oNI
public final static int INSERT = 1; ^#3$C?d
public final static int BUBBLE = 2; gyCb\y+\a
public final static int SELECTION = 3; $o]zNW;X
public final static int SHELL = 4; ;S`Nq%,
public final static int QUICK = 5; mkE*.I0=
public final static int IMPROVED_QUICK = 6; IH~H6US
public final static int MERGE = 7; 2z0HB+Y}x
public final static int IMPROVED_MERGE = 8; (m04Z2#
public final static int HEAP = 9; mZ/B:)_
jcq(=7j
public static void sort(int[] data) { :jp?FF^j;
sort(data, IMPROVED_QUICK); ?783LBe
} hD>:WJ
private static String[] name={ wmo'Pl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QV .A.DK
}; &@+K%qW[e
gP(-Op
private static Sort[] impl=new Sort[]{ @/$mZ]|T
new InsertSort(), F|P2\SPL
new BubbleSort(), "bf8[D
new SelectionSort(), n+Ag|.,|
new ShellSort(), <*(~x esPS
new QuickSort(), p+8]H %
new ImprovedQuickSort(), 7vj[ AOq3l
new MergeSort(), z%Z}vWn
new ImprovedMergeSort(), &g& &-=7)
new HeapSort() =l7LEkR
}; sM5 w~R>Y
TdQ^^{SRp
public static String toString(int algorithm){ r]HLO'<]
return name[algorithm-1]; !%s7I^f*
} "apv)xdW
KG3*~G
public static void sort(int[] data, int algorithm) { =JVRm 2#*
impl[algorithm-1].sort(data); =dA T^e##
} (ZEVbAY?i
|%RFXkHS
public static interface Sort { GU[Cq=k
public void sort(int[] data); `=KrV#/758
} iT5H<uS
0a'@J~v!
public static void swap(int[] data, int i, int j) { ~!&[;EM<bm
int temp = data; M9&tys[KX
data = data[j]; ~ml\|
data[j] = temp; g8x8u|
} ]_pL79y
} 7>~iS@7GV