[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; -x-EU#.G
} 6_>(9&g`zV
int i1=l; 2Mj_wc
int i2=mid+1; M"yOWD~s~
for(int cur=l;cur<=r;cur++){ o,{]<Sm
if(i1==mid+1) me$nP}%C&
data[cur]=temp[i2++]; 'u6n,yRm
else if(i2>r) a&u!KAQ
data[cur]=temp[i1++]; %uvA3N>
else if(temp[i1] data[cur]=temp[i1++]; $f+cd8j?o
else HJt '@t=Ak
data[cur]=temp[i2++]; 6xx(o
} Wu'9ouw!
} F12$BKDH
|qpFR)l
} .TNGiUzG
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改进后的归并排序: WG +]
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package org.rut.util.algorithm.support; 9K-,#a
2x~Pq_?y
import org.rut.util.algorithm.SortUtil; M,<UnAVP-
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/** 0bteI*L
* @author treeroot ZtY?X- 4_
* @since 2006-2-2 ~Gl5O`w(
* @version 1.0 d '\^S}
*/ 0 gR_1~3
public class ImprovedMergeSort implements SortUtil.Sort { S}qGf%
rA}mp]
private static final int THRESHOLD = 10; k+~2 vmS
-K/c~'%'*
/* f6 s .xQ
* (non-Javadoc) 9U Hh#
* *bUOd'vh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0bOT&Z^
*/ *'@sm*
public void sort(int[] data) { QwL*A `@
int[] temp=new int[data.length]; 25<qo{
mergeSort(data,temp,0,data.length-1); $GYy[8{:V
} 1p=bpJC
2a*+mw
private void mergeSort(int[] data, int[] temp, int l, int r) { MeV*]*
int i, j, k; B qLL]%F
int mid = (l + r) / 2; 03"FK"2S
if (l == r) .@$A~/ YU
return; 6W:FT Pt44
if ((mid - l) >= THRESHOLD) j1=su~
mergeSort(data, temp, l, mid); Hz%<V*\{
else r 5t{I2
insertSort(data, l, mid - l + 1); 4RfBXVS
if ((r - mid) > THRESHOLD) 1\nzfxx
mergeSort(data, temp, mid + 1, r); O`T_'.Lk
else zx@L sp
insertSort(data, mid + 1, r - mid); c/V0AKkS 8
Rln\
for (i = l; i <= mid; i++) { syCT)}T6z
temp = data; RwhKW?r+
} 1fC)&4W
for (j = 1; j <= r - mid; j++) { IkO[R1K
temp[r - j + 1] = data[j + mid]; <k{_YRB
} tlB-s;
int a = temp[l]; n%Oq"`w4
int b = temp[r]; Q{CRy-ha
for (i = l, j = r, k = l; k <= r; k++) { $F NH:r<
if (a < b) { )Br#R:#
data[k] = temp[i++]; |(CgX6 l3
a = temp; >=;hnLu
} else { `U&'71B^
data[k] = temp[j--]; 1L?d/j
b = temp[j]; 204"\mv
} #qv!1$}2
} u=Xpu,q
} P"o|kRO
*$Zy|&[Z
/** +O^} t
* @param data u?F.%j-
* @param l AnK X4Q
* @param i 3*\hGt,ZP
*/ aU_l"+5>vq
private void insertSort(int[] data, int start, int len) { CeM%?fr5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2/\I/QkTs
} Mi\- 9-
} YFW/ Fa\7
} }$g"|;<ha
} ;#mm_*L%@
t<`d*M2w
堆排序： g:@4/+TSt
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package org.rut.util.algorithm.support; [f}`reRlZ
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import org.rut.util.algorithm.SortUtil; Pq@-`sw
yYSoJqj Q
/** DQ9aq.;
* @author treeroot <{@D^L6h
* @since 2006-2-2 \U##b~Z,g
* @version 1.0 Y#6LNI
*/ {?"X\5n0
public class HeapSort implements SortUtil.Sort{ H)CoByaj
lJ,\^\q
/* (non-Javadoc) 8kvA^r`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >V4r'9I
*/ f1sp6S0V\
public void sort(int[] data) { $4qM\3x0,
MaxHeap h=new MaxHeap(); reM~q-M~o@
h.init(data); OR37
for(int i=0;i h.remove(); A.h0H]*Ma
System.arraycopy(h.queue,1,data,0,data.length); \v$zU
} rhZp
<4~SFTWY
private static class MaxHeap{ u%Mo.<PI
_!Pi+l4p/}
void init(int[] data){ D7muf
this.queue=new int[data.length+1]; H328I}7
for(int i=0;i queue[++size]=data; ivB,s5<
fixUp(size); *{5/" H5
} ;=k{[g 'gv
} -yb7s2o
kD7'BP/#
private int size=0; _18Z]XtX
5NhAb$q2Y
private int[] queue; qq3/K9 #y
?%#no{9
public int get() { 0C\cM92o
return queue[1]; s,AJR [
} 2.]d~\
Dy8H(_
public void remove() { LC$M_Cpw
SortUtil.swap(queue,1,size--); f.bwA x
fixDown(1); 2aX$7E?
} IKaW],sr#
file://fixdown =e0MEV#s.
private void fixDown(int k) { C'{B
int j; -$Kc"rX
while ((j = k << 1) <= size) { g9NE>n(3
if (j < size %26amp;%26amp; queue[j] j++; s@GE(Pu7
if (queue[k]>queue[j]) file://不用交换 yeBfzKI{b
break; XsDZ<j%x89
SortUtil.swap(queue,j,k); Ts3!mjn
k = j; 7oc Ng
} "]Uj _d
} Bjj=UtI
private void fixUp(int k) { f8V )nM+v"
while (k > 1) { 2J%L%6z8~
int j = k >> 1; IXlk1tHN4I
if (queue[j]>queue[k]) BE],PCpPr
break; 0c1=M|2
SortUtil.swap(queue,j,k); l!W!Gz0to
k = j; (I(U23A~
} /m,i,NX07
} b\zq,0%
-B! a O65^
} ;' |CSjco
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} Sa0IRC<LV
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SortUtil： b?VByJl
7/_|/4&
package org.rut.util.algorithm; a=x&sz\x
dmcY]m
import org.rut.util.algorithm.support.BubbleSort; 9j5|o([J
import org.rut.util.algorithm.support.HeapSort; VS_\bIC
import org.rut.util.algorithm.support.ImprovedMergeSort; q?)5yukeF
import org.rut.util.algorithm.support.ImprovedQuickSort; TU6YS<
import org.rut.util.algorithm.support.InsertSort; aY;34SF
import org.rut.util.algorithm.support.MergeSort; e'c3.sQ|?
import org.rut.util.algorithm.support.QuickSort; 'HCRi Z<
import org.rut.util.algorithm.support.SelectionSort; ;l<Hen*
import org.rut.util.algorithm.support.ShellSort; 49O_A[(d
=<)/lz] H
/** (l9jczi
* @author treeroot /u`Opv&I
* @since 2006-2-2 <P&X0S`O
* @version 1.0 [eBt Dc*w
*/ Evqy e;
public class SortUtil { L;A#N9
public final static int INSERT = 1; ^,?>6O
public final static int BUBBLE = 2; ="f-I9y
public final static int SELECTION = 3; Io>U-Zd\>
public final static int SHELL = 4; "}ur"bU1
public final static int QUICK = 5; gB+CM? LKq
public final static int IMPROVED_QUICK = 6; ygX!'evY
public final static int MERGE = 7; ,,6lQ]wG
public final static int IMPROVED_MERGE = 8; *~cNUyd
public final static int HEAP = 9; Ux{QYjFE
heB![N0:
public static void sort(int[] data) { fA0wQz]u
sort(data, IMPROVED_QUICK); 4>H0a
} "*V'
private static String[] name={ =CS$c?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &gJ@"`r4
}; ,KF>@3f
6 OvH"/X4
private static Sort[] impl=new Sort[]{ zlTLp-^Y
new InsertSort(), SB5qm?pT8<
new BubbleSort(), b"`fS`@/MW
new SelectionSort(), H@ty'z?
new ShellSort(), AW9%E/{
new QuickSort(), DT6BFx
new ImprovedQuickSort(), rM6S%rS
new MergeSort(), {{[@ X
new ImprovedMergeSort(), z|Xt'?9&n
new HeapSort() Z0D&ayzkh^
}; T nyLVIP
0}'/pN>
public static String toString(int algorithm){ !U(KQ:j
return name[algorithm-1]; K|6}g7&X
} xG Y!r"[
f,LeJTX=
public static void sort(int[] data, int algorithm) { AXi4{Q,
impl[algorithm-1].sort(data); eb,QT\/G
} ;- Vs|X
K;s`
public static interface Sort { ^L Xr4
public void sort(int[] data); 9ao?\]&t
} ;ByCtVm2
#q9BU:
public static void swap(int[] data, int i, int j) { E%stFyr9`/
int temp = data; Do^yer~
data = data[j]; -xJ\/"A
data[j] = temp; upJy,|5
} }v?l0Gk(
} %?qzP'