[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; Ad8n<zt|
} wLH>:yKUU
int i1=l; ~O0 $Suv
int i2=mid+1; y/{fX(aV
for(int cur=l;cur<=r;cur++){ wC+u73599
if(i1==mid+1) *[Tz![|
data[cur]=temp[i2++]; ->-KCd1b
else if(i2>r) H3^},.
data[cur]=temp[i1++]; n8 i] z
else if(temp[i1] data[cur]=temp[i1++]; @7]yl&LZ
else !8d{q)JZ
data[cur]=temp[i2++]; ["93~[[^
} kk@fL
} xb~yM%*c
,t?B+$E
} |(E FY\
rC%*$g $
改进后的归并排序: 4N_R:B-Vu
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package org.rut.util.algorithm.support; +H-6eP
;kQhx6Z
import org.rut.util.algorithm.SortUtil; f!uwzHA`?
@[<><uTH
/** s}9S8@#
* @author treeroot Y-_`23x`
* @since 2006-2-2 R6Km\N
* @version 1.0 m@2QnA[4
*/ OmpND{w
public class ImprovedMergeSort implements SortUtil.Sort { ^A$Zw+P
{ ]{/t-=
private static final int THRESHOLD = 10; Eu d*_>|
{_[N<U:QT&
/* X::JV7hu
* (non-Javadoc) @s;;O\
* HZC"nb}r4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3*"WG O5
*/ !Vn\u
public void sort(int[] data) { e "4 ''/
int[] temp=new int[data.length]; *SDs;kg
mergeSort(data,temp,0,data.length-1); %~H-)_d20
} yy^q2P
-hGk?_Nqa/
private void mergeSort(int[] data, int[] temp, int l, int r) { x_N'TjS^{
int i, j, k; i(%W_d!
int mid = (l + r) / 2; d9fC<Tp
if (l == r) WYm\)@
return; |^"1{7)
if ((mid - l) >= THRESHOLD) )Xz,j9GzJS
mergeSort(data, temp, l, mid); rxvx
else MDZ640-Y
insertSort(data, l, mid - l + 1); ifMRryN4
if ((r - mid) > THRESHOLD) wo;~7K
mergeSort(data, temp, mid + 1, r); 7Jyy z,!5
else en4k/w_
insertSort(data, mid + 1, r - mid); a od-3"7[
|}s*E_/[
for (i = l; i <= mid; i++) { 'j8:vq^d
temp = data; u"cV%(#
} ar!R|zmf
for (j = 1; j <= r - mid; j++) { 58tARLDr
temp[r - j + 1] = data[j + mid]; '6iEMg&3
} P6'1.R
int a = temp[l]; JW83Tp8[8
int b = temp[r]; h,u,^ r
for (i = l, j = r, k = l; k <= r; k++) { %op**@4/t\
if (a < b) { Q^9_'t}X
data[k] = temp[i++]; )Pa'UGY
a = temp; ah4N|zJ>v
} else { {Qf=G|Ah
data[k] = temp[j--]; zx"s*:O
b = temp[j]; ~zJbK. _
} by1<[$8r
} Olt?~}
} `_Zg3_K.dS
.nf#c.DI
/** wY{-BuXv
* @param data .=7vI$ujd
* @param l Mlg0WrJ|2
* @param i L2[($l
*/ hc(#{]].
private void insertSort(int[] data, int start, int len) { KEo,m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T"}5}6rSG
} WtsFz*`)y
} r4b 6 c
} 7?!d^$B
} ed{ -/l~j
(&Kk7<#`
堆排序： 5FPM`hLT
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package org.rut.util.algorithm.support; MO]F1E?X
6RU~"C
import org.rut.util.algorithm.SortUtil; #>("CAB02T
~|DUt
/** iJ)_RSFK
* @author treeroot ojm @t
* @since 2006-2-2 >UTBO|95y
* @version 1.0 #K_ii)n
*/ [B*x-R[FI
public class HeapSort implements SortUtil.Sort{ HTv2#
vFzRg5lH
/* (non-Javadoc) ^qvZXb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1APe=tJ
*/ aB2FC$z
public void sort(int[] data) { GE:vp>>}`
MaxHeap h=new MaxHeap(); 2. NN8PPD"
h.init(data); DZ3wCLQtK
for(int i=0;i h.remove(); V# }!-Xj
System.arraycopy(h.queue,1,data,0,data.length); I;,77PxD
} eH'av}
) yi E@ X
private static class MaxHeap{ Fj8z
P-9)38`5
void init(int[] data){ kr^P6}'
this.queue=new int[data.length+1]; z>1Pz(
for(int i=0;i queue[++size]=data; Gt8M&S-;
fixUp(size); xjUT{iwS
} |#v7/$!
} u"r`3P`
D#9m\o_
private int size=0; ?um;s-x)
]!W=^!
private int[] queue; ihhDOmUto
U|H=Y"pL
public int get() { 6##_%PO<m
return queue[1]; ;0]aq0_#(
} xk9%F?)
IEL%!RFG
public void remove() { 6fE7W>la
SortUtil.swap(queue,1,size--); [t m_Mg
fixDown(1); bi',j0B
} :;%2BSgFU
file://fixdown KC*e/J
private void fixDown(int k) { y;m|
int j; "=HA Y
while ((j = k << 1) <= size) { B{n,t}z
if (j < size %26amp;%26amp; queue[j] j++; ANAVn@ [
if (queue[k]>queue[j]) file://不用交换 v ,i%Q$
break; Si4!R+4w
SortUtil.swap(queue,j,k); #ZUI)9My@
k = j; 4@+`q *
} CCs%%U/=
} NR$3%0 nC6
private void fixUp(int k) { W 8<&gh+
while (k > 1) { kP=eW_0D
int j = k >> 1; H5/6TX72N
if (queue[j]>queue[k]) ]#iigPZ7
break; @o].He@L<j
SortUtil.swap(queue,j,k); B-RjMxX4>
k = j; ].avItg
} r8t}TU>C
} j7Yu>cr
@Myo'{3vF
} YH}'s>xZz
nUaJzPl
} ^)/0yB
gi3F` m
SortUtil： /cUO$m o
@W.S6;GA\
package org.rut.util.algorithm; <q58uuK
^`i#$
import org.rut.util.algorithm.support.BubbleSort; ^x]r`b
import org.rut.util.algorithm.support.HeapSort; (q/e1L-S
import org.rut.util.algorithm.support.ImprovedMergeSort; dohA0
import org.rut.util.algorithm.support.ImprovedQuickSort; i'<[DjMDlm
import org.rut.util.algorithm.support.InsertSort; 9Z$"K-G
import org.rut.util.algorithm.support.MergeSort; F@D`N0Pte
import org.rut.util.algorithm.support.QuickSort; `{@8Vsmy:
import org.rut.util.algorithm.support.SelectionSort; ''cInTCr
import org.rut.util.algorithm.support.ShellSort; d"1]4.c
ql Ax
/** J/`<!$<c
* @author treeroot ^do9*YejX;
* @since 2006-2-2 f#>,1,S
* @version 1.0 Gq)]s'r2
*/ DaQ?\uq
public class SortUtil { u=*FI
public final static int INSERT = 1; c1(RuP:S
public final static int BUBBLE = 2; .|KyNBn
public final static int SELECTION = 3; 1/B>XkCJ
public final static int SHELL = 4; U7,e/?a
public final static int QUICK = 5; |w~nVRb
public final static int IMPROVED_QUICK = 6; ZoW?nxY
public final static int MERGE = 7; G`D`Af/B
public final static int IMPROVED_MERGE = 8; vQG5*pR*w
public final static int HEAP = 9; @Rze| T.
d UE,U=
public static void sort(int[] data) { b<[Or^X ]
sort(data, IMPROVED_QUICK); *uRBzO}
} k!j5tsiR
private static String[] name={ ^]Y>[[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _gR;=~S
}; KJUH(]>F
(*9$`!wS
private static Sort[] impl=new Sort[]{ C\3rJy(VJ
new InsertSort(), FW;?s+Uyx
new BubbleSort(), 'T;P;:!\
new SelectionSort(), {_"<1C
new ShellSort(), ^rR1ZVY
new QuickSort(), ;3coP{
new ImprovedQuickSort(), GTPHVp&y
new MergeSort(), F@7jx:tI
new ImprovedMergeSort(), bn&TF3b
new HeapSort() "m$##X\
}; IZ-1c1
w>&aEv/f
public static String toString(int algorithm){ !<8W {LT
return name[algorithm-1]; ' ,wFTV&
} yNJ B oar
gnf8l?M
public static void sort(int[] data, int algorithm) { [ZwjOi:)
impl[algorithm-1].sort(data); wc@X.Q[
} e`_LEv
&ee~p&S,>
public static interface Sort { hp50J
public void sort(int[] data); e(;,`L\*
} z]y.W`i
2eS~/Pq5=i
public static void swap(int[] data, int i, int j) { =!A_^;NQf
int temp = data; %g$o/A$
data = data[j]; \A#41
data[j] = temp; Q~]uC2Mw
} F`W?II?
} c9 eM/*: