[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; L!mQP
} ;X|;/@@
int i1=l; j(/"}d3osm
int i2=mid+1; RTLu]Bry
for(int cur=l;cur<=r;cur++){ t(p
if(i1==mid+1) dL6sb;7R
data[cur]=temp[i2++]; d/P$qMD
else if(i2>r) I[tU}ojP
data[cur]=temp[i1++]; +vDT^|2SF
else if(temp[i1] data[cur]=temp[i1++]; }-: d*YtK
else () b0Sh=
data[cur]=temp[i2++]; <C# s0UX
} !QcgTW)T
} lSXhHy
}! zjj\g^
} XRP/E_4
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改进后的归并排序: @_N -> l
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package org.rut.util.algorithm.support; ;bP7|
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import org.rut.util.algorithm.SortUtil; ;PG'em
w>/KQ> \"
/** >[ lj8n
* @author treeroot d 'x;]#S
* @since 2006-2-2 8V=I[UF.1?
* @version 1.0 c7wza/r>
*/ `1M_rG1/+
public class ImprovedMergeSort implements SortUtil.Sort { uZ<Bfrc
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private static final int THRESHOLD = 10; Qbt fKn95
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/* m_\CK5T_
* (non-Javadoc) RD{jYr;
* =k3QymA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '["Y;/>
*/ =wS:)%u
public void sort(int[] data) { ,A[HYc|uy
int[] temp=new int[data.length]; ]vKxgfF
mergeSort(data,temp,0,data.length-1); .u W_(Rqg
} YwB5Zqr
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private void mergeSort(int[] data, int[] temp, int l, int r) { {oBVb{<
int i, j, k; ZPZ1 7-
int mid = (l + r) / 2; [r^f5;Z
if (l == r) #?}Y~Oe
return; Y$oBsg\v
if ((mid - l) >= THRESHOLD) f4!^0%l
mergeSort(data, temp, l, mid); >6jyd{
else R`TM@aaS:
insertSort(data, l, mid - l + 1); BN#^ /a-
if ((r - mid) > THRESHOLD) mI0|lp 1$
mergeSort(data, temp, mid + 1, r); ks(PH6:]<
else pSV 8!
insertSort(data, mid + 1, r - mid); z81I2?v[Jr
Jv7 @[<$
for (i = l; i <= mid; i++) { r~t&;yRv
temp = data; 4XX21<yn
} M7jDV|Go
for (j = 1; j <= r - mid; j++) { r10)1`[
temp[r - j + 1] = data[j + mid]; mN@0lfk;
} :*}tkr4&eh
int a = temp[l]; ~a/yLI"'g
int b = temp[r]; hDmVv;M:
for (i = l, j = r, k = l; k <= r; k++) { ='soSnT
if (a < b) { AbcLHV.
data[k] = temp[i++]; J0o U5d=3
a = temp; _ogT(uYyr
} else { 60X B
data[k] = temp[j--]; ^+,mxV'8!
b = temp[j]; #i)h0ML/e
} :,GsbNKW
} 5 0~L(<
} s2w.V O
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/** $t}L|"=8X
* @param data 8&`s wu&
* @param l xo^_;(;
* @param i (Ca\$p7/
*/ T3M 4r|
private void insertSort(int[] data, int start, int len) { K;[V`)d'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fFSW\4JD=
} OP:;?Fs9`
} 8)R)h/E>
} (">!vz
} <C CEqY4
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堆排序： 9dKrE_zK:
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package org.rut.util.algorithm.support; .>CqZN,^
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import org.rut.util.algorithm.SortUtil; [Hn+r&
(CuaBHR
/** ^IQC:21
* @author treeroot -qx Z3
* @since 2006-2-2 E37`g}ZS
* @version 1.0 D5AKOM!`
*/ nSd?P'PFg
public class HeapSort implements SortUtil.Sort{ X)~JX}-L
I:mJWe
/* (non-Javadoc) ]IyC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /xf%Rp4}
*/ 3ck;~Ncj<
public void sort(int[] data) { ?bN8h)>QQ8
MaxHeap h=new MaxHeap(); 173/A=]
h.init(data); Q v{q:=k
for(int i=0;i h.remove(); siyJjE)}w
System.arraycopy(h.queue,1,data,0,data.length); '<1T>|`/t
} >@ge[MuS
1j0yON
private static class MaxHeap{ yKfRwO[j
;=UrIA@y;=
void init(int[] data){ W P.6ea7k
this.queue=new int[data.length+1]; 4(B,aU>y
for(int i=0;i queue[++size]=data; 2psI\7UjA]
fixUp(size); 6PJ0iten
} Fnll&TF
} |q5\1}@:
CXA)Zl5#
private int size=0; fyQAQZT
=>ph\
private int[] queue; !7 *X{D v
4fpz;2%
public int get() { B.&q]CAv-
return queue[1]; `<\AnhNW]I
} T(3"bS.,
_CI!7%
public void remove() { OBb
SortUtil.swap(queue,1,size--); ,h>0k`J:a
fixDown(1); Kr]F+erJe
} U_M> Q_r(
file://fixdown $C^94$W
private void fixDown(int k) { S=M$g#X`5
int j; &x;v&
while ((j = k << 1) <= size) { "v^Q !
if (j < size %26amp;%26amp; queue[j] j++; 8 kd
if (queue[k]>queue[j]) file://不用交换 (h`||48d
break; s "*Cb*
SortUtil.swap(queue,j,k); <VgnrqF6:
k = j; LD^V="d
} % YU(,83(+
} EJZl'CR
private void fixUp(int k) { e ~*qi&,4
while (k > 1) { VN`2bp>5I
int j = k >> 1; SjG=H%
if (queue[j]>queue[k]) {\lu; b!
break; O`|'2x{[O
SortUtil.swap(queue,j,k); ]S%qfna e1
k = j; F=d#$-yg
} CS6,mX
} =b !f
5:56l>0
} #l:qht
]j_S2lt
} hc~--[1c:
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SortUtil： m0un=>{
6!b96bV
package org.rut.util.algorithm; 6,s@>8n
\zgRzO'N
import org.rut.util.algorithm.support.BubbleSort; gpE5ua&
import org.rut.util.algorithm.support.HeapSort; ot-!_w<
import org.rut.util.algorithm.support.ImprovedMergeSort; ?c=l"\^x
import org.rut.util.algorithm.support.ImprovedQuickSort; f]o DZO%^
import org.rut.util.algorithm.support.InsertSort; 9e8@0?0
import org.rut.util.algorithm.support.MergeSort; oa;[[2c
import org.rut.util.algorithm.support.QuickSort; wf8vKl#Kfw
import org.rut.util.algorithm.support.SelectionSort; -+ $u
import org.rut.util.algorithm.support.ShellSort; w 7=Y_
37M7bB0
/** QGLfZvTT
* @author treeroot &o:ZOD.
* @since 2006-2-2 / ^!(rHf
* @version 1.0 4[bw/[
*/ m6'YFpf)V
public class SortUtil { "L{;=-e
public final static int INSERT = 1; oPre$YT}h
public final static int BUBBLE = 2; $@Hw DRP
public final static int SELECTION = 3; p?8>9
public final static int SHELL = 4; : <m0 GG
public final static int QUICK = 5; AO/J:`
public final static int IMPROVED_QUICK = 6; i3#]_ p{
public final static int MERGE = 7; o+6Y/6Xp@
public final static int IMPROVED_MERGE = 8; 1VJE+3
public final static int HEAP = 9; ,n&Dg58K
B.{0,bW?
public static void sort(int[] data) { .hT^7|Jz[
sort(data, IMPROVED_QUICK); WY<ip<
} tTQ>pg1{qh
private static String[] name={ PjRKYa_U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3tOnALv
}; QE-t v00
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private static Sort[] impl=new Sort[]{ I>ofSaN
new InsertSort(), 8kO|t!?:U
new BubbleSort(), b4,yLVi<T
new SelectionSort(), tEf-BV;\y
new ShellSort(), 2R|2yAh
new QuickSort(), 0/-[k
new ImprovedQuickSort(), R,6?1Z:J
new MergeSort(), EeL~`$f
new ImprovedMergeSort(), !~>u\h
new HeapSort() :Wb+&|dU
}; EY> %#0
kiqq_`66
public static String toString(int algorithm){ .F%RW8=Q
return name[algorithm-1]; E%/E%9-7\
} i,b>&V/Y$
#(XP=PUj
public static void sort(int[] data, int algorithm) { iCz,|;w%
impl[algorithm-1].sort(data); ?i9LqHL
} zb:p,T@5
@GjWeOj]
public static interface Sort { p/SJt0
public void sort(int[] data); ~-'nEATE
} aD%")eP%&
X0P<ifIv
public static void swap(int[] data, int i, int j) { C]eb=rw$
int temp = data; P#76ehR]K
data = data[j]; shP,-Vs#
data[j] = temp; #gi&pR'$
} W;Fcp
} =]etw