[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; K"9V8x3Wg
} y`-5/4
int i1=l; CFiO+p&
int i2=mid+1; F[==vte|
for(int cur=l;cur<=r;cur++){ RTvzS]
if(i1==mid+1) oHkjMqju
data[cur]=temp[i2++]; qn~:B7f
else if(i2>r) 5`[B:<E4
data[cur]=temp[i1++]; ?K^~(D8(
else if(temp[i1] data[cur]=temp[i1++]; 2^=.jML[
else nAW`G'V#
data[cur]=temp[i2++]; ]LZ,>v
} I xE}v%&
} iU a `<
Ems0"e
} 2~2j?\AEd.
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改进后的归并排序: P};GcV-
uM('R;<^
package org.rut.util.algorithm.support; ?FwjbG<
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import org.rut.util.algorithm.SortUtil; HU+zzTgI
wT-@v,$
/** rgXD>yu(
* @author treeroot K^+}__;]
* @since 2006-2-2 q.NvwJ
* @version 1.0 ,N`D{H"F
*/ ${)s ~[
public class ImprovedMergeSort implements SortUtil.Sort { IRl(H_.
+~1~f'4J
private static final int THRESHOLD = 10; hXz@ (cF
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/* L\("
* (non-Javadoc) :Y2J7p[+
* sn.&|)?Fi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "N*i!h
*/ ad[oor/7|
public void sort(int[] data) { V-TWC@Y"
int[] temp=new int[data.length]; c9)5G+
mergeSort(data,temp,0,data.length-1); lM-*{<B
} 2@#`x"0
088"7 s
private void mergeSort(int[] data, int[] temp, int l, int r) { k>q}: J9V
int i, j, k; F5FzT^
int mid = (l + r) / 2; YUsMq3^&
if (l == r) m kHcGB!~
return; 3Mt Alc0xp
if ((mid - l) >= THRESHOLD) x$Tf IFy
mergeSort(data, temp, l, mid); = ~^
else MJ0UZxnl
insertSort(data, l, mid - l + 1); 7__?1n~{
if ((r - mid) > THRESHOLD) >@c~M
mergeSort(data, temp, mid + 1, r); _4#&!b6
else y<A%&
insertSort(data, mid + 1, r - mid); ;(,1pi7|
ZP^7`q)6
for (i = l; i <= mid; i++) { ;IX*4E'4s
temp = data; 26<Wg7/,
} cJ!C=J
for (j = 1; j <= r - mid; j++) { CxRhMhvP
temp[r - j + 1] = data[j + mid]; Y;6%pm$
} 7O.{g
int a = temp[l]; dw]wQ\4B
int b = temp[r]; l9X\\uG&
for (i = l, j = r, k = l; k <= r; k++) { T&PLvyBL
if (a < b) { |8YP8o
data[k] = temp[i++]; ?\$\YX%/p
a = temp; [.`%]Z(
} else { q^k]e{PD
data[k] = temp[j--]; @ME .
b = temp[j]; N_Y*Z`Xb
} /l@h[}g+d-
} 2>!?EIE7
} EU"J'?
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/** Yab=p 9V;;
* @param data ~ GW8|tw
* @param l "~HV!(dRMC
* @param i ~ok i s
*/ O9tgS@*Tv
private void insertSort(int[] data, int start, int len) { bxA1fA;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @Xb>GPVe#L
} =ykOh_M
} C#A\Rfi
} 5zBayJh#
} d$(>=gzBQ
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堆排序： wu2C!gyBo
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package org.rut.util.algorithm.support; J\V.J/
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import org.rut.util.algorithm.SortUtil; Cq-#|+zr
.6D9m.Q,
/** }lzN)e
* @author treeroot ]9}T)Df'
* @since 2006-2-2 `bF]O"
* @version 1.0 WDdp(<
*/ 11Hf)]M
public class HeapSort implements SortUtil.Sort{ ^,M&PP6
&G"r>,HU
/* (non-Javadoc) &RP}w%I1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \1p5$0z
*/ f YuM`O
public void sort(int[] data) { ^sjL@.'m$N
MaxHeap h=new MaxHeap(); L!]~J?)
h.init(data); X&qa3C})
for(int i=0;i h.remove(); a|v}L,
System.arraycopy(h.queue,1,data,0,data.length); }lzQMT
} K9J"Q4pEC
j{;RuNt
private static class MaxHeap{ 6Q6l?!|W4
b88Zk*
void init(int[] data){ |_P-
this.queue=new int[data.length+1]; .V\M/q\Tv
for(int i=0;i queue[++size]=data; !dW77kLTg
fixUp(size); Hw"UJP
} u70-HFI@
} [8K+zT5
v8`)h<:W?
private int size=0; Twj?SV
M5Twulz/w
private int[] queue; 'C9H6)Zq)
oYG].PC
public int get() { gAY%VFBP0
return queue[1]; dTV:/QM
} K~#wvUb
p~sfd
public void remove() { OZ$"P<X_"
SortUtil.swap(queue,1,size--); +HK)A%QI
fixDown(1); yeCR{{B/'
} <9s=K\-
file://fixdown f2#9E+IQ
private void fixDown(int k) { R "&(Ae?LR
int j; /Lc= K<
while ((j = k << 1) <= size) { O&:0mpRZ
if (j < size %26amp;%26amp; queue[j] j++; VhAZncw
if (queue[k]>queue[j]) file://不用交换 P~+?:buqc
break; _uO#0 )l
SortUtil.swap(queue,j,k); |@-%x.y
k = j; i~IQlyGr.
} B9Dh^9?L
} Qw$"W/&X
private void fixUp(int k) { r $du-U
while (k > 1) { $J |oVVct
int j = k >> 1; Dk'EKT-
if (queue[j]>queue[k]) xmDX1sL**
break; Ohm>^N;
SortUtil.swap(queue,j,k); >q&Q4E0
k = j; (Jw[}&+
} !k&~|_$0@
} m\lSBy6
,qRSB>5c
} 3"gifE
)r2$/QF9
} _e.b#{=9
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SortUtil： a.5s5g)8
T2wn!N?r
package org.rut.util.algorithm; K;f'&9-+i,
?;,Al`/^
import org.rut.util.algorithm.support.BubbleSort; '^l/e: (H3
import org.rut.util.algorithm.support.HeapSort; ]kmOX
import org.rut.util.algorithm.support.ImprovedMergeSort; gkpNT)
import org.rut.util.algorithm.support.ImprovedQuickSort; wYf=(w\c
import org.rut.util.algorithm.support.InsertSort; ] %*970
import org.rut.util.algorithm.support.MergeSort; WRAW%?$
import org.rut.util.algorithm.support.QuickSort; (%>Sln5hq
import org.rut.util.algorithm.support.SelectionSort; NEO~|B*oDU
import org.rut.util.algorithm.support.ShellSort; `~(C\+gUp
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/** r2T?LO0N{
* @author treeroot LoG@(g&)
* @since 2006-2-2 Yi[dS`,d
* @version 1.0 t.pg;#
*/ Uc0AsUu}?
public class SortUtil { Q:~w;I
public final static int INSERT = 1; @2_s;!K
public final static int BUBBLE = 2; +k"dN^K]D
public final static int SELECTION = 3; Et'C4od s
public final static int SHELL = 4; 8mA6l0
public final static int QUICK = 5; F$ .j|C1a
public final static int IMPROVED_QUICK = 6; $UjSP
public final static int MERGE = 7; 2LYd # !i
public final static int IMPROVED_MERGE = 8; ZZC= 7FB
public final static int HEAP = 9; dW7dMx
E|9LUPcb
public static void sort(int[] data) { g]xZ^M+
sort(data, IMPROVED_QUICK); fC3IxlG
} s/[i>`g/9
private static String[] name={ ud:?~?j&w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SEchF"KJQF
}; BHmA*3?
W7A'5
private static Sort[] impl=new Sort[]{ 4Sg!NPuu7&
new InsertSort(), cM4?Ggn
new BubbleSort(), vP}K(' (
new SelectionSort(), oQ;f`JC^
new ShellSort(), /^[)JbgB
new QuickSort(), H>XbqIkL@
new ImprovedQuickSort(), %Z{J=
new MergeSort(), ~v>w%]
new ImprovedMergeSort(), e( ^9fg_SG
new HeapSort() (&MSP
}; :e@JESlLf
8VcAtrx_
public static String toString(int algorithm){ W? UCo6<m
return name[algorithm-1]; lO $M6l
} Dlj=$25
xdo{4XY^*W
public static void sort(int[] data, int algorithm) { ^y6Pkb P
impl[algorithm-1].sort(data); E2*"~gL^,
} ,.`^Wx6F
6 qKIz{;
public static interface Sort { \S7OC
public void sort(int[] data); %yw*!A1
} Sw1]]-Es
N~>?w#?J
public static void swap(int[] data, int i, int j) { CJKH"'u3^
int temp = data; Z `\7B e
data = data[j]; Br~%S?4"o
data[j] = temp; ^/n[5@6H
} S,(@Q~
} iKabo,~