[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; 5gI@~h S
} ^/R@bp#<
int i1=l; &X_I^*
int i2=mid+1; Gyy:.]>&
for(int cur=l;cur<=r;cur++){ KBzEEvx/$
if(i1==mid+1) Mim 9C]h(
data[cur]=temp[i2++]; ?`\<t$M
else if(i2>r) -+|0LXo
data[cur]=temp[i1++]; S=[K/Kf-
else if(temp[i1] data[cur]=temp[i1++]; NNutpA}s
else D.qbzJz
data[cur]=temp[i2++]; 8[f]9P/i
} (5-"5<-@R
} ]S,I}NP
a>sUq["
} \R&`bAdk
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改进后的归并排序: lqqY5l6j
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package org.rut.util.algorithm.support; Podm 3b
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import org.rut.util.algorithm.SortUtil; p`{<q -
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/** l:Ci'=
* @author treeroot rVQ:7\=Z
* @since 2006-2-2 'ycs{}'
* @version 1.0 ^fnRzX
*/ f(D?g
public class ImprovedMergeSort implements SortUtil.Sort { K* [cJcY+
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private static final int THRESHOLD = 10; LfOGq%&
56?U4wj7{
/* ?\$77k
* (non-Javadoc) axU!o /m>
* .vQ2w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =*Wl;PI'
*/ nkN]z ^j
public void sort(int[] data) { W'gCFX
int[] temp=new int[data.length]; \FVR'A1
mergeSort(data,temp,0,data.length-1); %l:%c
} 1Lj\"+.
s)/i_Oe$\
private void mergeSort(int[] data, int[] temp, int l, int r) { CoJaVLl
int i, j, k; 7 hnTHL
int mid = (l + r) / 2; 8l!S<RA
if (l == r) ?0'bf y]
return; kf"cd1
if ((mid - l) >= THRESHOLD) wQ.ild
mergeSort(data, temp, l, mid); @gxO%@@
else oVC~RKA*
insertSort(data, l, mid - l + 1); Q.\+ XR_|
if ((r - mid) > THRESHOLD) %HYC-TF#
mergeSort(data, temp, mid + 1, r); C:4h
else 9SAyU%mS:
insertSort(data, mid + 1, r - mid); )%,bog(x
k(VA5upCs
for (i = l; i <= mid; i++) { CUxSmN2[
temp = data; m"U\;Mw?
} dC,F?^
for (j = 1; j <= r - mid; j++) { p[Q
temp[r - j + 1] = data[j + mid]; ?`FI!3j
} 00b )Bg
int a = temp[l]; P\N`E?lJL
int b = temp[r]; 3$HFHUMQsk
for (i = l, j = r, k = l; k <= r; k++) { AFMAgf{bD
if (a < b) { ^=R>rUCmv
data[k] = temp[i++]; gvy%`SSW
a = temp; h ?p^DPo
} else { ||Lqx#e=
data[k] = temp[j--]; eKStt|M'
b = temp[j]; |L`w4;
} 2^qY,dL
} "F%cn@l
} 7qzI]
_Dk;U*2
/** ND21;
* @param data hsfVKlw-
* @param l kTC6fNj[
* @param i &+*jTE
*/ YToRG7X#
private void insertSort(int[] data, int start, int len) { 3s>&h-E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IOIGLtB
} z ^a,7}4
} % ;6e@U}
} T+2?u.{I
} KZDB\T
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堆排序： },[j+wx
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package org.rut.util.algorithm.support; ?<F\S2W
wF38c]r`\<
import org.rut.util.algorithm.SortUtil; $>#PhOC
6o,,w^
/** !-2S(8
* @author treeroot wetkmd
* @since 2006-2-2 J-I7K!B
* @version 1.0 yY,.GzIjCj
*/ 0n3O;=[aV
public class HeapSort implements SortUtil.Sort{ ^M?uv{354
!-\*rdE{9
/* (non-Javadoc) ,L_p"A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q:nYUW o
*/ M)3h 4yQ
public void sort(int[] data) { qe\j$Cjy
MaxHeap h=new MaxHeap(); gk]r:p<O
h.init(data); GbZA3.J]yl
for(int i=0;i h.remove(); zHu:Ec7
System.arraycopy(h.queue,1,data,0,data.length); N 4,w
} L@[bgN`=v
5Z;Py"%
private static class MaxHeap{ $RF"m"
AY *
void init(int[] data){ w@oq.K
this.queue=new int[data.length+1]; N*o+m~:y
for(int i=0;i queue[++size]=data; ][0HJG{{g
fixUp(size); S9xC> |<
} 2gFQHV
} fxiq,o0
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private int size=0; rfCoi>{<
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private int[] queue; 4NbC V)Dm
&f!!UZMt)
public int get() { b\;QR?16R
return queue[1]; BKJW\gS2
} T>LtN
\W$>EH
public void remove() { |r3eq4$Am
SortUtil.swap(queue,1,size--); H)(Jjk-O
fixDown(1); OO\UF6MCU
} cvc.-7IO
file://fixdown ,cj34W`FWq
private void fixDown(int k) { SUvHLOA
int j; }*+ca>K
while ((j = k << 1) <= size) { 9]kWM]B)o
if (j < size %26amp;%26amp; queue[j] j++; i>0bI^H
if (queue[k]>queue[j]) file://不用交换 u/hD9g~H7K
break; J)o~FC]b*
SortUtil.swap(queue,j,k); _<5> E
k = j; 9-L.?LG
} )~!Gs/w6
} /~AajLxu3W
private void fixUp(int k) { n1!u aUC
while (k > 1) { WXGLo;+>I
int j = k >> 1; BDcl1f T
if (queue[j]>queue[k]) ^>]p4Q3 6
break; H#Vs3*VK
SortUtil.swap(queue,j,k); b/<n:*$
k = j; <v0 d8
} JJ[J'xl@
} S* <:He&1
a*??!
} ]Ub?Wo7F?
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} IWKQU/l!
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SortUtil： fq\E$'o$
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package org.rut.util.algorithm; \}G/F!
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import org.rut.util.algorithm.support.BubbleSort; T;.#=h
import org.rut.util.algorithm.support.HeapSort; 8Gs{Zfp!D
import org.rut.util.algorithm.support.ImprovedMergeSort; v')T^b F@
import org.rut.util.algorithm.support.ImprovedQuickSort; }JvyjE
import org.rut.util.algorithm.support.InsertSort; L# (o(4g2
import org.rut.util.algorithm.support.MergeSort; -YRF^72+
import org.rut.util.algorithm.support.QuickSort; "EhA _ =i
import org.rut.util.algorithm.support.SelectionSort; VxaJ[s3PQ&
import org.rut.util.algorithm.support.ShellSort; qDL9
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/** C\ 9eR
* @author treeroot >5)$Qtz#
* @since 2006-2-2 ;-U:t4
* @version 1.0 ]6FpUF#<D
*/ 6fQQKM@a|
public class SortUtil { m!w(Q+*j
public final static int INSERT = 1; !J'BAq[x
public final static int BUBBLE = 2; mWCY%o@
public final static int SELECTION = 3; =][[TH
public final static int SHELL = 4; .gx*gX1<
public final static int QUICK = 5; ;h3c+7u1
public final static int IMPROVED_QUICK = 6; ZShRE"`
public final static int MERGE = 7; JKXs/r;:
public final static int IMPROVED_MERGE = 8; M>8#is(pV
public final static int HEAP = 9; s#64NG
57D /"
public static void sort(int[] data) { c?j/H$
sort(data, IMPROVED_QUICK); E*j)gj9
} 1kvBQ1+
private static String[] name={ zc\e$MO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d5UdRX]*
}; $oe:km1-D
mp>,TOi~s7
private static Sort[] impl=new Sort[]{ -05#/-Z=
new InsertSort(), S0,p:Wey
new BubbleSort(), 7;0^r#:87#
new SelectionSort(), ebp18_a|
new ShellSort(), wHAoO#`wn5
new QuickSort(), Z2j M.[hq
new ImprovedQuickSort(), DF P0WXbOE
new MergeSort(), ;| )&aTdH
new ImprovedMergeSort(), (Lp<T!"
new HeapSort() }p]8'($
}; <TC\Nb$~
{D 9m//x
public static String toString(int algorithm){ )zf&`T
return name[algorithm-1]; hL+)XJu^J
} _>S."cm}!k
V80g+)|
public static void sort(int[] data, int algorithm) { ~bf-uHx
impl[algorithm-1].sort(data); +pkX$yz
} U4w^eWzP
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public static interface Sort { ncuqo'r
public void sort(int[] data); m+?$cyA>v
} ,Tvfn`;(
/2Y t\=S=
public static void swap(int[] data, int i, int j) { " ;8H;U`
int temp = data; -iLp3m<ai
data = data[j]; /xUTm=w7u
data[j] = temp; xKi: 2
} @!1o +x
} ds}:t.3}6