[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; 64^3ve3/a=
} 8\PI1U
int i1=l; ogV v 8Xb
int i2=mid+1; Sg\+al7
for(int cur=l;cur<=r;cur++){ |ss4pN0X
if(i1==mid+1) zIr-Rx'dL^
data[cur]=temp[i2++]; lcfs 1].
else if(i2>r) Oz"_KMz
data[cur]=temp[i1++]; 'S9jMyZrZ
else if(temp[i1] data[cur]=temp[i1++]; tQTjqy{K
else X'xnJtk
data[cur]=temp[i2++]; w.+G+r=
} iWkC:fQz
} V%`\x\Xat
&,\my-4c>
} dkQP.Tj$i
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改进后的归并排序: $9W,1wg
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package org.rut.util.algorithm.support; w,0OO f
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import org.rut.util.algorithm.SortUtil; <EY{goW
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/** E[FE-{B#
* @author treeroot ?0:=+%.
* @since 2006-2-2 @S&QxE^
* @version 1.0 bu=RU
*/ "cvhx/\1#
public class ImprovedMergeSort implements SortUtil.Sort { e`K{
|!CAxE0d$B
private static final int THRESHOLD = 10; HY(XI u
Lx|0G $
/* e^N}(Kpy
* (non-Javadoc) +.-mqtM
* &@w0c>Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gIKQip<
*/ mgb+HNH%q\
public void sort(int[] data) { E=]|v+#~
int[] temp=new int[data.length]; #1WCSLvtV
mergeSort(data,temp,0,data.length-1); qTGi9OP6/
} YhP+{Y8t
x }]"jj2x
private void mergeSort(int[] data, int[] temp, int l, int r) { !%N@>[
int i, j, k; 1-|aeJ
int mid = (l + r) / 2; !x")uYf
if (l == r) *n6L3"cO
return; /Zxq-9
if ((mid - l) >= THRESHOLD) msQ?V&+<
mergeSort(data, temp, l, mid); v[)8 1uY
else ,E"n7*6mr
insertSort(data, l, mid - l + 1); 1Vs>G
if ((r - mid) > THRESHOLD) 8d&%H,
mergeSort(data, temp, mid + 1, r); D2RvFlAXu
else \mWH8Z }Z
insertSort(data, mid + 1, r - mid); [$#G|>x
` }B,w-,io
for (i = l; i <= mid; i++) { w:mm@8N
temp = data; ,wngS=
} 2UxmKp[
for (j = 1; j <= r - mid; j++) { ?%n"{k?#
temp[r - j + 1] = data[j + mid]; *;U<b
} xqQK-?k
int a = temp[l]; !'B='].
int b = temp[r]; &=XK:+
for (i = l, j = r, k = l; k <= r; k++) { .hnq>R\
if (a < b) { /QQjb4S}
data[k] = temp[i++]; D0>Pc9
a = temp; 5=R]1YI~$
} else { Y~?Z'uR
data[k] = temp[j--]; gEw9<Y
b = temp[j]; >*Ej2ex
} 0%)T]SDS
} ~YByyJG
} amQTPNI
}_('3C,Ba
/** 2jxIr-a1G
* @param data ce; zn\
* @param l T6."j_
* @param i :6/$/`I0W
*/ 6;wKL?snO
private void insertSort(int[] data, int start, int len) { Ey=}bBx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %jHe_8=o
} cDK)zD
} ]wi0qc2{
} O%haaL\
} h@o6=d=4
>(.Y%$9"E
堆排序： 9A/bA|$
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package org.rut.util.algorithm.support; A;dD'Kgl
G*jq5_6
import org.rut.util.algorithm.SortUtil; [HL>Lp&A?
!Ce!D0Tx
/** /Gn0|]KI
* @author treeroot @^o7UzS4z
* @since 2006-2-2 :8HVq*itS
* @version 1.0 <0qhc$M
*/ o\; hF3
public class HeapSort implements SortUtil.Sort{ =LGSywWM9
Bf6i{`!G
/* (non-Javadoc) F^`+.G\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FFN Sn
*/ X8-x$07)
public void sort(int[] data) { 5&O%0`t
MaxHeap h=new MaxHeap(); h=JW^\?\]
h.init(data); M"bG(a(6:
for(int i=0;i h.remove(); &`m$Zzl;
System.arraycopy(h.queue,1,data,0,data.length); gS@<sO$d>
} gVI`&W__,
~(7ct*U~
private static class MaxHeap{ &flRrJ
=LKM)d=1
void init(int[] data){ +l.LwA
this.queue=new int[data.length+1]; O0s!3hKu
for(int i=0;i queue[++size]=data; M)nh~gU
fixUp(size); wG9aX*(n
} vxLr034
} DEt!/a{X
8S8UV(K0
private int size=0; ;R Jv7@
qxsHhyB_n;
private int[] queue; ts}OE
<RZqs
public int get() { ?Zsh\^k.g
return queue[1]; R!lug;u#
} nc\2A>f`
aM(#J7;
public void remove() { R/*"N'nH-%
SortUtil.swap(queue,1,size--); I%GQ3D"=
fixDown(1); EtaKo}!A}
} Cl-P6NlR".
file://fixdown !c1M{klP
private void fixDown(int k) { `wQs$!a
int j; ?6hd(^
while ((j = k << 1) <= size) { ]!@=2kG4
if (j < size %26amp;%26amp; queue[j] j++; @rDBK] V
if (queue[k]>queue[j]) file://不用交换 G%;>_E
break; (Y8LyY
SortUtil.swap(queue,j,k); gmgri
k = j; }!R*Q`m
} 4Orq;8!BW
} x[Hx.G}5+
private void fixUp(int k) { TI/RJF b
while (k > 1) { <hiv8/)?
int j = k >> 1; NsSZ?ky
if (queue[j]>queue[k]) :z&kbG
break; -!\%##r7~
SortUtil.swap(queue,j,k); Tsj/alC[
k = j; 8ih_S2Cd
} s}OL)rW=}
} WFFQxd|Z
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} wytMoG\
]+3M\ ib
} 9_iwikD
6 U[VoUU
SortUtil： {*TB }Xsr,
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package org.rut.util.algorithm; Rvx7}ZL!
%.r\P@7/Q
import org.rut.util.algorithm.support.BubbleSort; _ahp7-O
import org.rut.util.algorithm.support.HeapSort; vYb4&VV
import org.rut.util.algorithm.support.ImprovedMergeSort; KV|D]}
import org.rut.util.algorithm.support.ImprovedQuickSort; 6Aq]I$
import org.rut.util.algorithm.support.InsertSort; ~%g,Uypi
import org.rut.util.algorithm.support.MergeSort; gh\u@#$8
import org.rut.util.algorithm.support.QuickSort; :Dw_$
import org.rut.util.algorithm.support.SelectionSort; zGyRzxFN
import org.rut.util.algorithm.support.ShellSort; *pSnEWwE
CJ%'VijhD
/** AG9DJ{T
* @author treeroot 8h@L_*Kr
* @since 2006-2-2 0m4M@94
* @version 1.0 w43b=7
*/ ?O#,{ZZf=
public class SortUtil { aF+Lam(
public final static int INSERT = 1; #)xlBq4cZ
public final static int BUBBLE = 2; h8 N|m0W
public final static int SELECTION = 3; d7[^pN
public final static int SHELL = 4; =<p=?16 x
public final static int QUICK = 5; La9}JvQoX
public final static int IMPROVED_QUICK = 6; hk:>*B}
public final static int MERGE = 7; !E?+1WDS0
public final static int IMPROVED_MERGE = 8; @0P4pt;(
public final static int HEAP = 9; J( XDwt
4s9@4
public static void sort(int[] data) { j,^&U|!
sort(data, IMPROVED_QUICK); oo &|(+"O_
} K;sC#9m
private static String[] name={ k89N}MA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (1^;l;7H
}; |TMn
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private static Sort[] impl=new Sort[]{ l`N#~<.
new InsertSort(), Bt}90#
new BubbleSort(), v"ORn5
new SelectionSort(), gs3(B/";c
new ShellSort(), 9GCK3
new QuickSort(), \zg R]|
new ImprovedQuickSort(), 2{~`q
new MergeSort(), Y`]P&y
new ImprovedMergeSort(), uuwJ-
new HeapSort() kOD=H-vSi
}; 7AT8QC`u
aHuMm&
public static String toString(int algorithm){ Vlz\n
return name[algorithm-1]; iw/~t
} N6-7RoA+
"J+L]IC?AD
public static void sort(int[] data, int algorithm) { bH/4f93Nb
impl[algorithm-1].sort(data); "kFH*I+v
} *izCXfW7
/fb}]e]N
public static interface Sort { ?.< Qgd
public void sort(int[] data); )SJM:E
} E7\K{]
PbZ%[F
public static void swap(int[] data, int i, int j) { )GVTa4}p
int temp = data; V;MmPNP|
data = data[j]; CqC )H7A
data[j] = temp; P8X9bW~GQ
} BT8)t.+pv
} ;.sYE/ZVi