[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; Qv@Z#
} |%~sU,Y\(
int i1=l; H|iY<7@
int i2=mid+1; g+98G8R
for(int cur=l;cur<=r;cur++){ *"D8E^9
if(i1==mid+1) enGjom
data[cur]=temp[i2++]; -dn\*n5
else if(i2>r) )gR !G]Y
data[cur]=temp[i1++]; :h+gSvn:
else if(temp[i1] data[cur]=temp[i1++]; X6dv+&=?
else e-#!3j!'
data[cur]=temp[i2++]; 7}<057Xn'
} s$ 2@|;
} e.|_=Gd2/
Sy<s/x^`
} 4W''j[Y/
L4'FL?~I
改进后的归并排序: *.DTcV
Lh5d2}tcO
package org.rut.util.algorithm.support; kWgZIkY
%CP:rAd`M.
import org.rut.util.algorithm.SortUtil; &<E*W*b[
w&7-:."1i
/** 8f<[Bu ze
* @author treeroot uE6;;Ir#mF
* @since 2006-2-2 WurpHOJt+
* @version 1.0 ~D)!zQkD
*/ zU9G:jH
public class ImprovedMergeSort implements SortUtil.Sort { kG7q4jFwP
Z)zWfv}
private static final int THRESHOLD = 10; ~agzp`!M
&&;ol}W
/* ]'F{uDm[
* (non-Javadoc) 5Go&+|cvJ
* }bVWV0Aeim
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ''f07R
*/ L@|W&N;%a
public void sort(int[] data) { XKU+'Tz
int[] temp=new int[data.length]; qi\!<clv
mergeSort(data,temp,0,data.length-1); ^vjN$JB
} R;_U BQ)
Tej-mr3P
private void mergeSort(int[] data, int[] temp, int l, int r) { eswsxJ/!
int i, j, k; #w4=kWJ[
int mid = (l + r) / 2; u,e(5LU
if (l == r) v^h \E+@
return; P/'~&*m-
if ((mid - l) >= THRESHOLD) cia4!-#
mergeSort(data, temp, l, mid); /QsFeH
else ^ )Lh5
insertSort(data, l, mid - l + 1); Xh/i5}5 t
if ((r - mid) > THRESHOLD) ,f4mFL0~N
mergeSort(data, temp, mid + 1, r); bg'B^E3
else Fs_umy#
insertSort(data, mid + 1, r - mid); M[ (mH(j
,HEx9*E/s
for (i = l; i <= mid; i++) { s9<fPv0w
temp = data; U3+{!}gn
} ~O)Uz|
for (j = 1; j <= r - mid; j++) { $SQ8,Y,
temp[r - j + 1] = data[j + mid]; bN$!G9I!,
} BHE((3
int a = temp[l]; a<%WFix
int b = temp[r]; 28;D>6c
for (i = l, j = r, k = l; k <= r; k++) { _$me.
if (a < b) { }*~EA=YN;
data[k] = temp[i++]; 5O Ob(
a = temp; 4-4lh TE(
} else { zn T85#]\@
data[k] = temp[j--]; dF{3~0+,
b = temp[j]; mAFqA
} ,uD F#xjl,
} 0KyujU?sF
} A/N$
I)E+
/** /(w:XTO<
* @param data 2sjP":
* @param l ,P ?TYk
* @param i BYEqTwhT&
*/ w0Fi~:b
private void insertSort(int[] data, int start, int len) { :z^ps0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5#.uA_Fov
} 2,O-/A;tW*
} Wiqy".YY
} dhN[\Z%
} Ru Q\H0pr
p;:tzH\l
堆排序： <0T4MR7
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package org.rut.util.algorithm.support; )p"37Ct?
#D3e\(
import org.rut.util.algorithm.SortUtil; Hw5\~!FX
e0HG"z4
/** PKR0y%Ar
* @author treeroot "_ b Sy
* @since 2006-2-2 PNXZ3:W
* @version 1.0 J.:"yK""
*/ .Lo$uKsW$l
public class HeapSort implements SortUtil.Sort{ I]>-~_
YH^_d3A;
/* (non-Javadoc) d3T|N\(DL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (|Am
*/ }$V]00 X
public void sort(int[] data) { 5j`"@C5;O
MaxHeap h=new MaxHeap(); l/yLSGjM
h.init(data); EA2BN}
for(int i=0;i h.remove(); |H5){2V>K
System.arraycopy(h.queue,1,data,0,data.length); rd\mFz-SB
} []0`>rVq
6hYv
private static class MaxHeap{ 2](R}
a J[VX)"J
void init(int[] data){ n<Z;Xh~F
this.queue=new int[data.length+1]; qt}vM*0}V
for(int i=0;i queue[++size]=data; }1w[G;$
fixUp(size); A6}M F
} ?rWqFM:hb
} !h7`W*::
Ly\$?3h
private int size=0; RMDs~
m?xzx^xs/
private int[] queue; !,Wd$UK
7|T<dfQk
public int get() { %96JH YcX
return queue[1]; {$>*~.Wu
} OekcU%C
Kwfrh?
public void remove() { WUAjb,eo
SortUtil.swap(queue,1,size--); knpb$eX4
fixDown(1); X#5dd.RR
} _< 69d
file://fixdown "*#$$e53A
private void fixDown(int k) { ppVjFCv0<
int j; A,MRK#1u
while ((j = k << 1) <= size) { GC H= X
if (j < size %26amp;%26amp; queue[j] j++; Mq42^m:qe
if (queue[k]>queue[j]) file://不用交换 d6<,R;)
break; u.0Z)j}N
SortUtil.swap(queue,j,k); {gl-tRC3
k = j; ][:6En}
} _x z_D12
} ]1%H.pF
private void fixUp(int k) { }f^r@3Cb3
while (k > 1) { eGvHU ;@
int j = k >> 1; 9#/z[!
if (queue[j]>queue[k]) <!K2xb-d^
break; Y:G6Nd VFM
SortUtil.swap(queue,j,k); B8Jev\_
k = j; 'rHkJ
} Iqe4O~)
} %B3E9<9>U
;e()|
} Xgd!i}6Q
{8Hrb^8!
} wlC_rRj~
qDhz|a#
SortUtil： =9y'6|>l
5)V J
package org.rut.util.algorithm; [f.[C5f%"'
(p68Qe%OuG
import org.rut.util.algorithm.support.BubbleSort; Lh"Je-x<<
import org.rut.util.algorithm.support.HeapSort; @= 6}w_
import org.rut.util.algorithm.support.ImprovedMergeSort; 3w ?)H
import org.rut.util.algorithm.support.ImprovedQuickSort; c>!>D7:7
import org.rut.util.algorithm.support.InsertSort; ~({aj|Y
import org.rut.util.algorithm.support.MergeSort; ]0xbvJ8oK
import org.rut.util.algorithm.support.QuickSort; `BMg\2Ud*
import org.rut.util.algorithm.support.SelectionSort; w@X<</`
import org.rut.util.algorithm.support.ShellSort; ]XJpy-U
jr*A1y*
/** '%V ;oJ"
* @author treeroot zkI\ji
* @since 2006-2-2 Jm\'=#U#
* @version 1.0 0^]E-Zf
*/ ,L\OhT
public class SortUtil { %D\TLY
public final static int INSERT = 1; /Y:_qsO1
public final static int BUBBLE = 2; B y6:
public final static int SELECTION = 3; 9HRYk13ae
public final static int SHELL = 4; J@H9nw+Q
public final static int QUICK = 5; D._q'v<
public final static int IMPROVED_QUICK = 6; 8G1Tpn
public final static int MERGE = 7; K`j#'`/KC
public final static int IMPROVED_MERGE = 8; W&}R7a@:<~
public final static int HEAP = 9; MT$OjH'Q`
^]Lr_k
public static void sort(int[] data) { 7}%3Aw6]S
sort(data, IMPROVED_QUICK); ^g~Asz5]
} -}MWA>an8
private static String[] name={ t}qoIxy)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Io5-[d
}; | 3!a=
\5k[ "8~
private static Sort[] impl=new Sort[]{ hBLJKSv
new InsertSort(), aQMET~A:
new BubbleSort(), IJs*zzR
new SelectionSort(), PsEm(.z
new ShellSort(), Exc`>Y q
new QuickSort(), vy[*xT]
new ImprovedQuickSort(), ^EjZ.#2l;
new MergeSort(), TWQf2
new ImprovedMergeSort(), `;*Wt9
new HeapSort() x7t<F4
}; @GBS-iT3
C"<l}
public static String toString(int algorithm){ }7g\1l\
return name[algorithm-1]; P@lExF*D1:
} `T{{wty
`w@fxv
public static void sort(int[] data, int algorithm) { )mB+#T<k-
impl[algorithm-1].sort(data); PX(.bP2^Lq
} j S')!Wcu
=KmjCz:
public static interface Sort { XtNe) Ry
public void sort(int[] data); vXR-#MS`}
} @PZ&/F^
a_L&*%;
public static void swap(int[] data, int i, int j) { f&js,NU"
int temp = data; )2g\GRg6
data = data[j]; 9|D!&=8
data[j] = temp; n9050&_S
} ?<#6=
} rfkk3oy