[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; ?$ M:4mX
} H}gp`YW:4
int i1=l; <AU0ir
int i2=mid+1; b8|<O:]Hp
for(int cur=l;cur<=r;cur++){ YhL^kM@c
if(i1==mid+1) /?u]Fj
data[cur]=temp[i2++]; -{NP3zy
else if(i2>r) <l<6W-I
data[cur]=temp[i1++]; yBfX4aH:`
else if(temp[i1] data[cur]=temp[i1++]; $ U-#woXa
else 5'n$aFqI
data[cur]=temp[i2++]; VI?kbqjo
} 4X5KrecNr
} nRs:^Q~o
M[ ON2P;
} ^SW0+O
B{>x
改进后的归并排序: 4++pK;I
=-/sB>-C
package org.rut.util.algorithm.support; ;3+_aoY
@x_0AkZU
import org.rut.util.algorithm.SortUtil; gpogv -
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/** 3(_:"?xA
* @author treeroot ,6SzW+L7
* @since 2006-2-2 Ht|"91ZC5
* @version 1.0 :}-izd)/j
*/ C~T*Wlk
public class ImprovedMergeSort implements SortUtil.Sort { ff 6x4t
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private static final int THRESHOLD = 10; 3 5/ s\
4mnVXKt%.
/* ^;wz+u4^l
* (non-Javadoc) 1wBmDEhS
* ym'!f|9AA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wjr^: d
*/ !1Nh`FN
public void sort(int[] data) { r(JP& @
int[] temp=new int[data.length]; '~zi~Q7M
mergeSort(data,temp,0,data.length-1); q2*1Gn9!j
} $J#Z`%B^y
-?NAA]P5c@
private void mergeSort(int[] data, int[] temp, int l, int r) { =ba1::18
int i, j, k; 5-UrHbpCZ#
int mid = (l + r) / 2; kc<5wY_t
if (l == r) lLLPvW[Q
return; WG +]
if ((mid - l) >= THRESHOLD) ~bz$]o-<
mergeSort(data, temp, l, mid); #x \YA#~
else 2x~Pq_?y
insertSort(data, l, mid - l + 1); M,<UnAVP-
if ((r - mid) > THRESHOLD) aI1tG
mergeSort(data, temp, mid + 1, r); FmgMd)#
else Tt4Q|"CJA
insertSort(data, mid + 1, r - mid); $3*y)Ny^
+3Z+#nGtk
for (i = l; i <= mid; i++) { +%Z:k
temp = data; iqKs:v@+x
} (,b\"Q
for (j = 1; j <= r - mid; j++) { p!K^Q3kO
temp[r - j + 1] = data[j + mid]; B_>r|^Vh
} `W.g1"o8W4
int a = temp[l]; QWE\Ud.q
int b = temp[r]; p$cb&NNh*H
for (i = l, j = r, k = l; k <= r; k++) { QwL*A `@
if (a < b) { tTT :r),}$
data[k] = temp[i++]; e@iz`~[
a = temp; V>c !V9w
} else { J+}z*/)|#
data[k] = temp[j--]; oWEzzMRz
b = temp[j]; m]c1DvQb
} ()5X<=i
} H~bbkql
} H3( @Q^9
&joP-!"
/** k]~$AaNq
* @param data Hz%<V*\{
* @param l r 5t{I2
* @param i 4RfBXVS
*/ = BbG2k
private void insertSort(int[] data, int start, int len) { >ByqM{?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aLlHR_
} z<gII~%
} TeFi[1
} 4gZ)9ya
} \["I.gQ
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堆排序： 0[ (kFe
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package org.rut.util.algorithm.support; KNR7Igw?}
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import org.rut.util.algorithm.SortUtil; 15OzO.Ud
<C451+95
/** PcjeuJZ
* @author treeroot 9 9^7Ek!z#
* @since 2006-2-2 O%w'nz"
* @version 1.0 3#y`6e=5
*/ [z!pm-Ir
public class HeapSort implements SortUtil.Sort{ =Aw`0
1DGl[k/zv
/* (non-Javadoc) Z[>fFg~N4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4p%^?L?
*/ ')/w+|F
public void sort(int[] data) { 6OqF-nso[E
MaxHeap h=new MaxHeap(); umCmxmr&
h.init(data); .[Qi4jm>`
for(int i=0;i h.remove(); \fp'=&tp~a
System.arraycopy(h.queue,1,data,0,data.length); cp0yr:~
} A4Q{(z-?
5rmQ:8_5
private static class MaxHeap{ KtArV
HZ1nuA
void init(int[] data){ MhJA8|B6|
this.queue=new int[data.length+1]; =woP~+
for(int i=0;i queue[++size]=data; .`(YCn?\
fixUp(size); 5K-,k^T}
} *Uy;P>8
} WD! " $
f4&;l|R0a
private int size=0; yYSoJqj Q
DQ9aq.;
private int[] queue; ^%tn$4@@Z.
%e)?Mem
public int get() { 5\h6'
return queue[1]; yXqC
} T#i~/
<":83RCS
public void remove() { .gt;:8fw{
SortUtil.swap(queue,1,size--); <j/wK]d*/
fixDown(1); q=-h#IF^
} DiGHo~f
file://fixdown T3LVn<Lm\
private void fixDown(int k) { *`LrvE@t
int j; JSmg6l?[u
while ((j = k << 1) <= size) { Ql9>i;AGV
if (j < size %26amp;%26amp; queue[j] j++; 1_l)$"
if (queue[k]>queue[j]) file://不用交换 +KWO`WR
break; C6h[L
SortUtil.swap(queue,j,k); :qzhkKu
k = j; mn*}U R
} PZO.$'L|7
} %oWG"u
private void fixUp(int k) { y&bZai8WlE
while (k > 1) { pred{HEye
int j = k >> 1; ydj*Jy'
if (queue[j]>queue[k]) g^7zDU&'
break; DtJ3`Jd
SortUtil.swap(queue,j,k); U#Iwe=
k = j; ovdaK"q2
} )1gT&sU0
} k8@bQ"#b
xxr'g =
} 06Q9X!xD
s^4wn:*$zd
} `^ a:1^
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SortUtil： fEiNHVx
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package org.rut.util.algorithm; {47Uu%XT
Y3s8@0b3
import org.rut.util.algorithm.support.BubbleSort; mAET`B "
import org.rut.util.algorithm.support.HeapSort; mN.
import org.rut.util.algorithm.support.ImprovedMergeSort; S)W?W}*R\
import org.rut.util.algorithm.support.ImprovedQuickSort; ecO$L<9>
import org.rut.util.algorithm.support.InsertSort; ;PnN$g]Q
import org.rut.util.algorithm.support.MergeSort; hwQ|'^(@O
import org.rut.util.algorithm.support.QuickSort; ]6s/y
import org.rut.util.algorithm.support.SelectionSort; :SWrx MT
import org.rut.util.algorithm.support.ShellSort; /-t!)_zvw
l*huKSX}
/** eVB43]g
* @author treeroot }2:q#}"
* @since 2006-2-2 \I^"^'CP
* @version 1.0 y7+n*|H
*/ D:?"Rf{)
public class SortUtil { !%DE(E*'(
public final static int INSERT = 1; !&3"($-U3G
public final static int BUBBLE = 2; /q,=!&f2
public final static int SELECTION = 3; H8B2{]HAt
public final static int SHELL = 4; ;uv$>Fauk
public final static int QUICK = 5; r!w*y3
public final static int IMPROVED_QUICK = 6; %tC[q
public final static int MERGE = 7; 3gD <!WI
public final static int IMPROVED_MERGE = 8; 2X*n93AQi
public final static int HEAP = 9; b?VByJl
7/_|/4&
public static void sort(int[] data) { P}(c0/
sort(data, IMPROVED_QUICK); a=x&sz\x
} bj0<A
private static String[] name={ Ciz,1IV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ShvC4Xb 0
}; o|c&$)m
5wE6gRJ
private static Sort[] impl=new Sort[]{ jC$~m#F
new InsertSort(), O '`|(L
new BubbleSort(), %++S;#)~
new SelectionSort(), Da!vGr
new ShellSort(), q8.Z7ux
new QuickSort(), gg8)oc+w
new ImprovedQuickSort(), y4aT-^C'
new MergeSort(), %e)vl[:}
new ImprovedMergeSort(), Y,EF'Ot
new HeapSort() ;]=@;? 9
}; JUXBMYFus
!0|&f>y
public static String toString(int algorithm){ L<XX?I\p
return name[algorithm-1]; [+#k+*1*o
} r'_#rl
z4` :n.
public static void sort(int[] data, int algorithm) { u$aN~6HG
impl[algorithm-1].sort(data); SG&H^V8
} f)gV2f0t
Eza^Tbq%j?
public static interface Sort { AE`UnlUSF
public void sort(int[] data); n "^rS}Y]
} 1vCp<D9<
0(9gTxdB
public static void swap(int[] data, int i, int j) { Xc^(e?L4
int temp = data; m^0 I3;
data = data[j]; S4_ZG>\VT
data[j] = temp; + 65<|0
} zV;NRf) 9.
} nD)SR