[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; 4 eh=f!(+
} 8GB]95JWwp
int i1=l; 0<P(M:a
int i2=mid+1; +^Jwo)R'b
for(int cur=l;cur<=r;cur++){ jn=ug42d
if(i1==mid+1) h)B!LAr
data[cur]=temp[i2++]; |^5/(16
else if(i2>r) nk08>veG
data[cur]=temp[i1++]; K+ehr
else if(temp[i1] data[cur]=temp[i1++]; zeOb Aw1O
else pcpxe&S
data[cur]=temp[i2++]; "Gh#`T0#a
} QWhp:]}
} 2ij/N%l
U>3 >Ex
} wXCyj+XB*
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改进后的归并排序: }u^:MI
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package org.rut.util.algorithm.support; ' o=E!?
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import org.rut.util.algorithm.SortUtil; @a;sV!S{
Yk7"XP[Y
/** Vu|dV\N0*
* @author treeroot 7+8bL{
* @since 2006-2-2 4!'1/3cY
* @version 1.0 $MT}l
*/ Qv!rUiXq
public class ImprovedMergeSort implements SortUtil.Sort { pGk"3.ce
eiB(VOJ
private static final int THRESHOLD = 10; ]L]T>~X`
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/* 24|<<Xn
* (non-Javadoc) ;$6x=uZ
* S~&\o\"5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E!YmcpCl
*/ ^Ezcy?
public void sort(int[] data) { R<j<.h
int[] temp=new int[data.length]; N l|^o{#
mergeSort(data,temp,0,data.length-1); z|%Bh
} Q0SW;o7
e[p^p!a
private void mergeSort(int[] data, int[] temp, int l, int r) { W9jNUZVXE#
int i, j, k; :~r#LRgc
int mid = (l + r) / 2; =F[lg?g
if (l == r) vK'9{q|g
return; ;_bq9x
if ((mid - l) >= THRESHOLD) uE"2kn
mergeSort(data, temp, l, mid); uXP- J]>
else WhenwQT
insertSort(data, l, mid - l + 1); scmto cm
if ((r - mid) > THRESHOLD) 3DI^y`av
mergeSort(data, temp, mid + 1, r); G4);/#
else 5F03y`@ u
insertSort(data, mid + 1, r - mid); `E%(pjG
|w,^"j2R
for (i = l; i <= mid; i++) { +DxifXtB
temp = data; *vXDuhQ
} }{#7Z8
for (j = 1; j <= r - mid; j++) { <tU :U<ea]
temp[r - j + 1] = data[j + mid]; C&FN#B
} ZU^Q1}</5
int a = temp[l]; A ')(SGSc
int b = temp[r]; e mC\i
for (i = l, j = r, k = l; k <= r; k++) { m^Rd Iy)
if (a < b) { ndB@J*Imu
data[k] = temp[i++]; S#hu2\9D,
a = temp; gm}C\q9
} else { SE-} XI\
data[k] = temp[j--]; %N1T{
b = temp[j]; iUpSN0XkMM
} KwQXA'
} |oFI[PE
} O{*GW0}55
/o'oF
/** M+\rX1T
* @param data >pa\n9=Q^
* @param l r5Wkc$
* @param i YBeZN98Nt
*/ ju r1!rg%
private void insertSort(int[] data, int start, int len) { V3%Krn1'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kU>#1He
} k\%,xf; x
} yh4jRe?f
} W|~q<},j
} Z!k5"\{0pE
,&4zKm
堆排序： *SXSF95
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package org.rut.util.algorithm.support; 0yKwH\S
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import org.rut.util.algorithm.SortUtil; +-'`Q Ae
|zg=+
/** rg"TJ"Q-
* @author treeroot <&*#famX
* @since 2006-2-2 EGr|BLl
* @version 1.0 i<0D Z_rub
*/ o<~-k,{5P
public class HeapSort implements SortUtil.Sort{ m*OLoZVy
"@aq@mY@
/* (non-Javadoc) 55(J&q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WNl&v]
*/ Ae3,W
public void sort(int[] data) { t4C<#nfo
MaxHeap h=new MaxHeap(); <[esA9.]t
h.init(data); G!-7ic_4
for(int i=0;i h.remove(); Hs.6;|0%
System.arraycopy(h.queue,1,data,0,data.length); r=xTs,xx
} MP_A<F
|2[S/8g!
private static class MaxHeap{ )Fw @afE~
Dg1kbO=2
void init(int[] data){ nmTm(?yE
this.queue=new int[data.length+1]; Q|6Ls$'$
for(int i=0;i queue[++size]=data; =I %g;YK
fixUp(size); z0=Rp0_W
} rwasH,+
} Sa(yjF1
Ks9FnDm8
private int size=0; #_JA5W+E
Qd9-u)L<
private int[] queue; 6@*5!,
(9Fabo\SH
public int get() { F]/L!
return queue[1]; .G7]&5s
} &?}kL= h
5B8V$ X
public void remove() { TW'E99wG
SortUtil.swap(queue,1,size--); e4[-rkn{hl
fixDown(1); {d&X/tT
} )er?*^9Z
file://fixdown hP,b-R9\
private void fixDown(int k) { jsK|D{m?
int j; c,+L +
while ((j = k << 1) <= size) { 6~:W(E}
if (j < size %26amp;%26amp; queue[j] j++; }wa}hIqx
if (queue[k]>queue[j]) file://不用交换 fho=<|-
break; } IIK~d,
SortUtil.swap(queue,j,k); ,eZ;8W{G
k = j; m~Kch~~]
} Ec7{BhH)
} !V$6+?2
private void fixUp(int k) { "#_)G7W+e
while (k > 1) { jh<TdvF2$
int j = k >> 1; qAS70XjOF
if (queue[j]>queue[k]) &/J.0d-*``
break; OpWC2t)
SortUtil.swap(queue,j,k); .E?bH V
k = j; chvrHvByS
} (=S"Kvb~#
} ^KaqvG$ed
z v L>(R
} P5yJO97
Bt|9%o06l
} 4GMa5]Ft
0A#9C09
SortUtil： c,3'wnui
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package org.rut.util.algorithm; xI.Orpw
4?P%M"\Iv
import org.rut.util.algorithm.support.BubbleSort; Fi?U)T+%+
import org.rut.util.algorithm.support.HeapSort; lp37irI:
import org.rut.util.algorithm.support.ImprovedMergeSort; JLFFh!J
import org.rut.util.algorithm.support.ImprovedQuickSort; j`[yoAH
import org.rut.util.algorithm.support.InsertSort; kR`6s
import org.rut.util.algorithm.support.MergeSort; D:ql^{~
import org.rut.util.algorithm.support.QuickSort; -dc"N|.
import org.rut.util.algorithm.support.SelectionSort; }QX2:a
import org.rut.util.algorithm.support.ShellSort; c<JM1
KZp,=[t
/** XwKZv0ub
* @author treeroot kuKnJWv
* @since 2006-2-2 5WtQwN~
* @version 1.0 -Fp!w"=T
*/ }5TfQV6
public class SortUtil { 1)P<cNj
public final static int INSERT = 1; CYTuj>Ww
public final static int BUBBLE = 2; !:g>CDA
public final static int SELECTION = 3; $ g1wK}B3
public final static int SHELL = 4; s/W!6JX4
public final static int QUICK = 5; YYZs#_
public final static int IMPROVED_QUICK = 6; EyKkjEXx_
public final static int MERGE = 7; *<|~=*Ddf
public final static int IMPROVED_MERGE = 8; ^cKv JSY
public final static int HEAP = 9; pAUfG^v
+[X.-,yW
public static void sort(int[] data) { ,N))=/
sort(data, IMPROVED_QUICK); 6\)8mK
} o1p$9PL\:
private static String[] name={ TNX%_Q<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Hm.&f2|(
}; s&_IWala
.Y^d9.
private static Sort[] impl=new Sort[]{ .NNcc4+
new InsertSort(), HiS,q0
new BubbleSort(), 9:K
new SelectionSort(), 4cErk)F4
new ShellSort(), _Gs
new QuickSort(), c*M)DO`y;h
new ImprovedQuickSort(), s$DT.cvO
new MergeSort(), K8yyxJ
new ImprovedMergeSort(), \U<F\i
new HeapSort() EE{#S
}; )"i>R ~*
"OS]\-
public static String toString(int algorithm){ @y;tk$e
return name[algorithm-1]; @=MZ6q
} 6>LQGO
Chb4VoE
public static void sort(int[] data, int algorithm) { D@lAT#vA
impl[algorithm-1].sort(data); y ? {PoNI
} ]'1N_m]?
69<rsp(p
public static interface Sort { w|n?m
public void sort(int[] data); _>_y@-b
} 0N3tsIm>
KOAz-h@6
public static void swap(int[] data, int i, int j) { J4'!
int temp = data; k?|zIu
data = data[j]; sGDrMAQt
data[j] = temp; S8W_$=4
} DoCQFSL
} ?O.6r"