[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; Z|G/^DK!
} Us,)]W.S
int i1=l; =!BobC- [b
int i2=mid+1; FZF @
for(int cur=l;cur<=r;cur++){ [#Y' dFQ
if(i1==mid+1) ciudRK63M
data[cur]=temp[i2++]; ^"9* 'vTtc
else if(i2>r) Rf)ke("
data[cur]=temp[i1++]; ?7 \\e;j}
else if(temp[i1] data[cur]=temp[i1++]; R_^/,^1
else 0"78/6XIs
data[cur]=temp[i2++]; _T5)n=|
} p~&BChBl!=
} SRZL\m}
U3E&n1AA
} UZGDdP
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改进后的归并排序: XM/vDdR
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package org.rut.util.algorithm.support; LH2PTW\b!6
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import org.rut.util.algorithm.SortUtil; sYqgXE.
y500Xs[c
/** 0w %[
* @author treeroot &fwS{n;U
* @since 2006-2-2 & ze>X
* @version 1.0 (CJ.BHu]
*/ tu0aD%C
public class ImprovedMergeSort implements SortUtil.Sort { \}5p0.=
e4`uVq5
private static final int THRESHOLD = 10; a^t?vv
H6K`\8/SeN
/* )}MHx`KT2
* (non-Javadoc) WA6!+Gy
* O/Rhf[7v*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KL [ek
*/ 5|I55CTx
public void sort(int[] data) { G_ >G'2
int[] temp=new int[data.length]; FY'ty@|_s
mergeSort(data,temp,0,data.length-1); 2 rN ,D(
} "B{ECM;
0:=ZkEEeU
private void mergeSort(int[] data, int[] temp, int l, int r) { ,qQG;w,m
int i, j, k; oH#v6{y
int mid = (l + r) / 2; geM6G$V&
if (l == r) RO&H5m r%@
return; ^B/9{0n'
if ((mid - l) >= THRESHOLD) 3QXjD/h
mergeSort(data, temp, l, mid); [q*%U4qGO
else ?+0GfIV
insertSort(data, l, mid - l + 1); At6qtoPRA
if ((r - mid) > THRESHOLD) 1[;;sSp
mergeSort(data, temp, mid + 1, r); usFfMF X
else F%d\~Vj
insertSort(data, mid + 1, r - mid); VsK>6S\T
`.%JjsD<
for (i = l; i <= mid; i++) { !ABiy6d
temp = data; 17|np2~
} aG+j9Q_
for (j = 1; j <= r - mid; j++) { 5D Y\:AF
temp[r - j + 1] = data[j + mid]; W_`A"WdT.
} l@JSK;
int a = temp[l]; lFSe?X^
int b = temp[r]; p|+B3
for (i = l, j = r, k = l; k <= r; k++) { \4d.sy0&>-
if (a < b) { 0d^Z uTN
data[k] = temp[i++]; l;A,0,i
a = temp; p\p\q(S">
} else { l?8M p$M
data[k] = temp[j--]; "TcW4U9
b = temp[j]; Ge+0-I6Ju
} )$Mmn
} B,WTHU[AV
} Oakb'
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/** bFS>)
* @param data Bux [6O%
* @param l Hr<o!e{Y
* @param i px;/8c-
*/ 7nU6k%_%
private void insertSort(int[] data, int start, int len) { R\|lt)h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n5-)/R[z
} 9BEFr/.
} '8Ztj
} Ih}1%Jq
} pd[ncL
LQYy;<K
堆排序： fvq,,@23
8eBOr9l+j
package org.rut.util.algorithm.support; H)w(q^i
S~Z|PLtF
import org.rut.util.algorithm.SortUtil; qa`-* 4m
N2'qpxOLI
/** hU]HTX'R
* @author treeroot }[+!$#
* @since 2006-2-2 lv&mp0V+
* @version 1.0 +=q)
*/ ~[WF_NU1y
public class HeapSort implements SortUtil.Sort{ b2,mCfLsv
iIT8H\e
/* (non-Javadoc) ^ KK_qC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xo}b= v
*/ D]a:@x`+Bz
public void sort(int[] data) { wxg^Bq)D*R
MaxHeap h=new MaxHeap(); dy__e^qi
h.init(data); rl#vE's6.e
for(int i=0;i h.remove(); YTQt3=1ii
System.arraycopy(h.queue,1,data,0,data.length); "@A![iP
} 0MMEo~dih
s=6}%%q6
private static class MaxHeap{ B(?Yw>Xd[
[H<bh%
void init(int[] data){ 7;@ST`cC
this.queue=new int[data.length+1]; >T2LEW
for(int i=0;i queue[++size]=data; @ V08U!
fixUp(size); 9Jf)!o8
} ~\)qi=
} le+R16Z
0P^L}VVX
private int size=0; u]NZ`t%AP
=*qD4qYA
private int[] queue; &6 s) X
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public int get() { 8$s9(n-_Y
return queue[1]; tM-^<V&
} znJhP}(
XqRJr%JH
public void remove() { G+xt5n.%
SortUtil.swap(queue,1,size--); D4eTTfQ
fixDown(1); .:p2Tbo
} /+*#pDx/zW
file://fixdown R[z`:1lo
private void fixDown(int k) { a,F&`Wg
int j; 8.'#?]a
while ((j = k << 1) <= size) { KrVcwAcq|1
if (j < size %26amp;%26amp; queue[j] j++; ^-mRP\5
if (queue[k]>queue[j]) file://不用交换 T_b^ Tc`
break; WwH+E]^e+
SortUtil.swap(queue,j,k); SG}V[Glk
k = j; Gb[`R}^dq
} ;6@r-r
} 2?m.45`
private void fixUp(int k) { ~ ~uAc_
while (k > 1) { 8l}1c=A}Vi
int j = k >> 1; 2!&&|Mh}
if (queue[j]>queue[k]) j'[m:/
break; ^-FX
SortUtil.swap(queue,j,k); yR{x}DbG
k = j; b" xmqWa
} Uv YF[@
} 7Dnp'*H
l`kWz5[~
} 5aad$f
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} +_XmlX A3Z
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SortUtil： H&r,FmI@
08X_}97#WF
package org.rut.util.algorithm; j!7`]
U\/5;Txy(
import org.rut.util.algorithm.support.BubbleSort; yC 77c=
import org.rut.util.algorithm.support.HeapSort; UnVm1ZWZ
import org.rut.util.algorithm.support.ImprovedMergeSort; @(P=Eh
import org.rut.util.algorithm.support.ImprovedQuickSort; !fBF|*/
import org.rut.util.algorithm.support.InsertSort; @ '@:sM_
import org.rut.util.algorithm.support.MergeSort; gtUUsQ%y.
import org.rut.util.algorithm.support.QuickSort; `1{N=!U(&
import org.rut.util.algorithm.support.SelectionSort; vvUSeG\n#j
import org.rut.util.algorithm.support.ShellSort; DAo~8H
iAT)VQ&
/** 8Ll[ fJZA
* @author treeroot LIg{J%
* @since 2006-2-2 + OV')oE
* @version 1.0 1n%?@+W
*/ .B#l5pfvP
public class SortUtil { 3@5=+z~CW
public final static int INSERT = 1; %m:m}ziLQ
public final static int BUBBLE = 2; zlR?,h-[3
public final static int SELECTION = 3; I^o!n5VM
public final static int SHELL = 4; |ZodlYF
public final static int QUICK = 5; +T9:Udi
public final static int IMPROVED_QUICK = 6; BpX6aAx
public final static int MERGE = 7; n|GaV
public final static int IMPROVED_MERGE = 8; TO%dw^{_`
public final static int HEAP = 9; ^(viM?*
M#|dIbns H
public static void sort(int[] data) { _gKe%J&
sort(data, IMPROVED_QUICK); PtqJ*Z
} Hw#d_P:
private static String[] name={ Sa19q.~%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" olLfko4$*V
}; qY\f'K}Q*
b64 @s2]
private static Sort[] impl=new Sort[]{ $gBd <N9|c
new InsertSort(), 0]HYP;E"U
new BubbleSort(), L 8{\r$
new SelectionSort(), iH^z:%dP
new ShellSort(), -,K!
new QuickSort(), q80S[au
new ImprovedQuickSort(), ]*7Y~dO
new MergeSort(), FKe,qTqa
new ImprovedMergeSort(), 2lL,zFAq
new HeapSort() ~ %B<
}; v]B L[/4
@ 49nJi
public static String toString(int algorithm){ VLBE'3Qg1
return name[algorithm-1]; 5k|9gICyd*
} i-yy/y-N
@ P|LLG'
public static void sort(int[] data, int algorithm) { OFje+S
impl[algorithm-1].sort(data); 1Bxmm#
} r! Ay:r
+a^F\8H
public static interface Sort { 5BBD.!
public void sort(int[] data); /%lZu^
} |W<+U
:$MG*/Q
public static void swap(int[] data, int i, int j) { *,BzcZ
int temp = data; *%KKNT'*
data = data[j]; 2w)-\/j}
data[j] = temp; > xIJE2
} ja=F7Usb
} 1~$);US