[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; $ylxl"Y
} (;HO3Z".q$
int i1=l; )k `+9}OO
int i2=mid+1; V{}TG]
for(int cur=l;cur<=r;cur++){ F0kQ/x
if(i1==mid+1) +5kQ;D{+
data[cur]=temp[i2++]; *$mb~k^R
else if(i2>r) XqcNFSo)
data[cur]=temp[i1++]; Jr>Nc}!U
else if(temp[i1] data[cur]=temp[i1++]; ^{E_fQJX
else f uH3C~u7<
data[cur]=temp[i2++]; nGTqW/k[+s
} Fg2/rC:_
} cn9=wm\\
E6-~
} &G3$q,`H
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改进后的归并排序: .Lm`v0'w
s>TC~d82
package org.rut.util.algorithm.support; ;\T~Hc}&;
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import org.rut.util.algorithm.SortUtil; 160BgFM
o+S?j*mv@
/** F5w=tK
* @author treeroot =knBwjeD
* @since 2006-2-2 D2\EpL/
* @version 1.0 = mhg@N4
*/ Yg1HvSw\
public class ImprovedMergeSort implements SortUtil.Sort { Z/;8eb*B7
~6OdwGWV
private static final int THRESHOLD = 10; 8PG&/"K
FGpV ]p
/* J]Q-#g'Z
* (non-Javadoc) SNHALF
* P>|sCF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~k ]$J|}za
*/ 4%u\dTg/B
public void sort(int[] data) { #"o`'5
int[] temp=new int[data.length]; f>?b2a2HX
mergeSort(data,temp,0,data.length-1); Jd33QL}Hj
} 1flBA,6L
uU+?:C
private void mergeSort(int[] data, int[] temp, int l, int r) { !B#tJD
int i, j, k; UXHtmi|_:
int mid = (l + r) / 2; "YVvmCp
if (l == r) Hqu?="f=
return; 7TZ,bD_
if ((mid - l) >= THRESHOLD) Uz`OAb
mergeSort(data, temp, l, mid); G4uOY?0N
else ORfMp'uP=
insertSort(data, l, mid - l + 1); ZYz8ul$E
if ((r - mid) > THRESHOLD) ;#7:}>}rO
mergeSort(data, temp, mid + 1, r); id/y_ekfP
else O*Z-3l
insertSort(data, mid + 1, r - mid); *uF Iw}C/
01+TVWKX
for (i = l; i <= mid; i++) { C3C&hq\%
temp = data; `O?j -zR
} W{kTM4
for (j = 1; j <= r - mid; j++) { c>#3{}X|x%
temp[r - j + 1] = data[j + mid]; 1EliR uJ
} y*I,i*iv
int a = temp[l]; : p7PiqQ
int b = temp[r]; mxCqN1:#
for (i = l, j = r, k = l; k <= r; k++) { F Zk[w>{
if (a < b) { 3X1 U
data[k] = temp[i++]; h;J%Z!Rjw
a = temp; Oc/ i'
} else { F[0w*i&u5
data[k] = temp[j--]; v0%FG9Gk
b = temp[j]; 7+P-MT
} 08nA}+k
} b.xG'
} //^{u[lr
Lo +H&-
/** G-DOI
* @param data s09&A]G
* @param l _2<d6@}
* @param i x0q`Uc
*/ kg$w<C@#"
private void insertSort(int[] data, int start, int len) { sg_%=;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9]a!1
} 0}$R4<"{Y>
} H$xUOqL
} v+d? #^
} MAgoxq~;V
-qB{TA-.\
堆排序： K- TLzoYA
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package org.rut.util.algorithm.support; R=L-Ulhk
ER<Z!*2
import org.rut.util.algorithm.SortUtil; twql)lbx
qB3=wFI
/** @P<Mc)o^
* @author treeroot `=I@W
* @since 2006-2-2 q&: t$tSS
* @version 1.0 !f#[4Xw
*/ b*cVC^{Dy
public class HeapSort implements SortUtil.Sort{ 6 $+b2&V
B|-W
/* (non-Javadoc) 8?t}S2n2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l'"Ici#7Ls
*/ ztV%W6
public void sort(int[] data) { ^FK-e;J
MaxHeap h=new MaxHeap(); /6#i$\ j
h.init(data); \Jr7Hy1;
for(int i=0;i h.remove(); OJ)XJL
System.arraycopy(h.queue,1,data,0,data.length); /#e-x|L
} W%K=N-kE_
j`k:)
private static class MaxHeap{ 3}i(i0+
j4eq.{$
void init(int[] data){ \l/<[ZZ
this.queue=new int[data.length+1]; +Pb@@C&
for(int i=0;i queue[++size]=data; l gTw>r
fixUp(size); Yr 1k\q
} ?4lEHef
} bU_P@GKB
S| l%JM^
private int size=0; x7c#kU2A&Z
#h2 qrX&+
private int[] queue; .&n;S';"
lAPPng`
public int get() { *Q,9 [k
return queue[1]; s^-o_K\*c
} o1rH@D6/-
:74G5U8%
public void remove() { ~>5
SortUtil.swap(queue,1,size--); AF"XsEt.e
fixDown(1); W^1)70<y
} 8,?*eYNjb
file://fixdown QQX7p!~E
private void fixDown(int k) { v'u}%FC
int j; XM?C7/^k
while ((j = k << 1) <= size) { 3qrjb]E%}
if (j < size %26amp;%26amp; queue[j] j++; a*Ng+~5)6
if (queue[k]>queue[j]) file://不用交换 Z`{GjV3%wH
break; *!yY7 ~#
SortUtil.swap(queue,j,k); ^a;412
k = j; :X#'ELo|
} vN`JP`IBx
} ddvtBAX
private void fixUp(int k) { rJc=&'{&)N
while (k > 1) { ?YhGW
int j = k >> 1; hbTJXP~~?
if (queue[j]>queue[k]) (^LR9 CW
break; Y j*Y*LB~
SortUtil.swap(queue,j,k); v^(J+d_>
k = j; 2I1CKA:7g
} "l 1z@
} C 4hvk'=
e2MjV8Bs
} lxOUV?m^N
p!2t/XIM
} tcj3x<
hg}R(.1K=
SortUtil： 420yaw/":
3("E5lI(g:
package org.rut.util.algorithm; r[RO"Ej"
U7d05y'
import org.rut.util.algorithm.support.BubbleSort; 2B=+p83<
import org.rut.util.algorithm.support.HeapSort; ,:?=j80m
import org.rut.util.algorithm.support.ImprovedMergeSort; S)G*+)
import org.rut.util.algorithm.support.ImprovedQuickSort; <+e&E9;>6
import org.rut.util.algorithm.support.InsertSort; q|N4d9/b
import org.rut.util.algorithm.support.MergeSort; ,PZ[CX;H@
import org.rut.util.algorithm.support.QuickSort; ]gB:ht
import org.rut.util.algorithm.support.SelectionSort; , @dhJ8/
import org.rut.util.algorithm.support.ShellSort; }y#aO
9c=`Q5
/** >d5L4&r
* @author treeroot km9@*@)
* @since 2006-2-2 ]d50J@W c
* @version 1.0 (,2U?p
*/ _}:#T8h
public class SortUtil { e^Glgaf
public final static int INSERT = 1; Zi ;7.PqL
public final static int BUBBLE = 2; VyxX5Lrj
public final static int SELECTION = 3; F=~LVaF/_
public final static int SHELL = 4; g9:V00^<
public final static int QUICK = 5; .0#{?R,
public final static int IMPROVED_QUICK = 6; Yjp*T:6
public final static int MERGE = 7; bDM;7fFp$
public final static int IMPROVED_MERGE = 8; :V:siIDn
public final static int HEAP = 9; 5D`!Tu3
R(<_p"9(
public static void sort(int[] data) { 6gJc?+
sort(data, IMPROVED_QUICK); gL6.,4q+1
} rJ fO/WK
private static String[] name={ Ihg1%.^V\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y_N h5
}; PW GNUNc
'' Pfs<!
private static Sort[] impl=new Sort[]{ ?/^x)Nm
new InsertSort(), C+Pw
new BubbleSort(), lsRW.h,
new SelectionSort(), +"Mlj$O
new ShellSort(), HWi: CDgm
new QuickSort(), F`JW&r\
new ImprovedQuickSort(), qJT|om LY
new MergeSort(), -)Y[t Z^*`
new ImprovedMergeSort(), #EX NSr
new HeapSort() yU< "tgE
}; ]5j1p6;(`
uw9w{3]0f
public static String toString(int algorithm){ @w@ `-1
return name[algorithm-1]; $z'_Hr'
} :,Ad1(
L|K^w *\C
public static void sort(int[] data, int algorithm) { 9:]|TIPi
impl[algorithm-1].sort(data); FpFkZFtG'm
} .V?>Jhok
SyCa~M!}>
public static interface Sort { Bu,VLIba
public void sort(int[] data); nTxN>?l2E
} yc3i> w`
W)fh}|.5
public static void swap(int[] data, int i, int j) { DyPb]Udb:
int temp = data; QN OA66
data = data[j]; V.Qy4u7m
data[j] = temp; Xo~kB)|,
} pQ9~^
} ^fxS=Qs+