[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; ma9ADFFT
} Q[s2}Z!N;
int i1=l; p,n\__
int i2=mid+1; |5xzl
for(int cur=l;cur<=r;cur++){ )o8g=7Jm
if(i1==mid+1) Q-R}qy5y
data[cur]=temp[i2++]; V_;9TC
else if(i2>r) %yaG,;>U
data[cur]=temp[i1++]; DuF7HTN[K
else if(temp[i1] data[cur]=temp[i1++]; M^ 5e~y
else /R%^rz'w
data[cur]=temp[i2++]; V:\]cGA{
} 8Inx/>eOI
} WOO%YU =
5 R*lVUix
} h#{T}[
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改进后的归并排序: ypA: P
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package org.rut.util.algorithm.support; +{6`F1MO
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import org.rut.util.algorithm.SortUtil; :l~EE!
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/** >I-g[*
* @author treeroot >38 Lt\
* @since 2006-2-2 C6)R#
* @version 1.0 z{6YC~
*/ 2cjEex:&
public class ImprovedMergeSort implements SortUtil.Sort { Dq`~XS*
l#6&WWmr
private static final int THRESHOLD = 10; 9d"5wx
l^,qO3ES
/* aRKv+{K
* (non-Javadoc) Qcgu`]7}
* /Ri,>}n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zKJ.Tj W
*/ ih!~G5Xi9i
public void sort(int[] data) { 1#D<ZN
int[] temp=new int[data.length]; A7(M,4`6
mergeSort(data,temp,0,data.length-1); QUPf*3Oy
} C<t RU5|
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private void mergeSort(int[] data, int[] temp, int l, int r) { S$K}v,8.sr
int i, j, k; .b _?-Fv
int mid = (l + r) / 2; W^(Iw%ek
if (l == r) o PaZ
return; wA r~<
if ((mid - l) >= THRESHOLD) ! o^Ic`FhS
mergeSort(data, temp, l, mid); cno;>[$
else u 6(GM
insertSort(data, l, mid - l + 1); 6+Jry@
if ((r - mid) > THRESHOLD) V5Xi '=
mergeSort(data, temp, mid + 1, r); <~O}6HQ#
else c `ud;lI
insertSort(data, mid + 1, r - mid); ?{j@6,
!a4cjc(
for (i = l; i <= mid; i++) { <N5rv3 s
temp = data; hBoP=X.~
} XSl!T/d
for (j = 1; j <= r - mid; j++) { jnDQ{D
temp[r - j + 1] = data[j + mid]; q\U4n[Zk
} wDZ
int a = temp[l]; ~B*~'I9b*
int b = temp[r]; *N'hA5.z
for (i = l, j = r, k = l; k <= r; k++) { RnSm]}?
if (a < b) { {Ve D@
data[k] = temp[i++]; zS?n>ElI
a = temp; yXXvs'$R \
} else { Q^|6J#o[9
data[k] = temp[j--]; YnD#p[Wo^
b = temp[j]; 2)?
} x?rbgsB5&
} &_YtY47
} dQ`:8SK
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/** W[GQ[h
* @param data _^b@>C>O
* @param l +]_nbWL(%
* @param i u x#.:C|
*/ [NZ-WU&&LP
private void insertSort(int[] data, int start, int len) { E+Im~=m$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _lNC<7+#h
} +.wT 9kFcc
} )+*{Y$/U
} }z?xGW/k
} 8Yxhd .
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堆排序： HrDTn&/
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package org.rut.util.algorithm.support; 2pjW,I!`
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import org.rut.util.algorithm.SortUtil; h*G#<M
0w'|d@*wV
/** }ymc5-
* @author treeroot ;fj9n-
* @since 2006-2-2 rWqkdi1
* @version 1.0 %P(;8sS
*/ 7:h<`_HT(X
public class HeapSort implements SortUtil.Sort{ #TIX_RXh
2k+=kt
/* (non-Javadoc) fMyE&#}z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .E#<fz
*/ ;hkro$
public void sort(int[] data) { zdqnL^wb
MaxHeap h=new MaxHeap(); {f&NStiB
h.init(data); 3y/1!A3
for(int i=0;i h.remove(); 9E^~#j@Zr
System.arraycopy(h.queue,1,data,0,data.length); {vLTeIxf.G
} rv`2*B
'qdg:_L"
private static class MaxHeap{ |GuKU!
,7t3>9-M"
void init(int[] data){ ;FcExg|k
this.queue=new int[data.length+1]; U%h7h`=F?
for(int i=0;i queue[++size]=data; Z6NJ)XQy6F
fixUp(size); K q/~T7Ru
} Uld_X\;Q4
} 9e-*JYF]C
u>81dO]H
private int size=0; xJN|w\&
iwB8I^
private int[] queue; 0Y[*lM-
~Vwk:+):
public int get() { m;1'u;
return queue[1]; 0GS{F8f~,
} ?_8%h`z
T.J`S(oI
public void remove() { pn|p(6
SortUtil.swap(queue,1,size--); DL %S(l
fixDown(1); V;H d)v(j
} _k6x=V;9g
file://fixdown DakLD~H;
private void fixDown(int k) { i^/ eN
int j; L7s>su|c(
while ((j = k << 1) <= size) { tF<^9stM
if (j < size %26amp;%26amp; queue[j] j++; #"hJpyW 4V
if (queue[k]>queue[j]) file://不用交换 E!dz/.
break; )\0Ug7]?
SortUtil.swap(queue,j,k); ^WmGo]<B_
k = j; \5t`p67Ve_
} ESn6D@"
} p(~Y" H
private void fixUp(int k) { yI3Q|731)
while (k > 1) { JL?Cnk$!
int j = k >> 1; 45?*:)l:
if (queue[j]>queue[k]) ||yXp2
break; R:]/{b4Uq
SortUtil.swap(queue,j,k); 1NuR/DO
k = j; fS5GICx8R
} hyJ ded&D
} 79TPg
+.S#=
} J 5Wz4`'
j?Cr31
} f#'8"ff*1
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SortUtil： N-XVRuv
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package org.rut.util.algorithm; 0[V&8\S~'T
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import org.rut.util.algorithm.support.BubbleSort; .=>\Qq%
import org.rut.util.algorithm.support.HeapSort; yJF 2
import org.rut.util.algorithm.support.ImprovedMergeSort; .Ln;m8
import org.rut.util.algorithm.support.ImprovedQuickSort; `l+ >iM
import org.rut.util.algorithm.support.InsertSort; $dlnmNP+
import org.rut.util.algorithm.support.MergeSort; {9h`$e=
import org.rut.util.algorithm.support.QuickSort; JX2mTQ
import org.rut.util.algorithm.support.SelectionSort; BjH~Ml2
import org.rut.util.algorithm.support.ShellSort; =Dh$yC-Zr
oP+kAV#]
/** TTeAa
* @author treeroot "Q3PC!7X:5
* @since 2006-2-2 xN e_qO
* @version 1.0 fndK/~?]H
*/ >{j,+$%kp
public class SortUtil { =$^Wkau
public final static int INSERT = 1; _7rqXkp%
public final static int BUBBLE = 2; &=v/VRan[
public final static int SELECTION = 3; <^CYxy
public final static int SHELL = 4; R#"U/8b>z
public final static int QUICK = 5; %T`4!:vy
public final static int IMPROVED_QUICK = 6; q:TZ=bs^
public final static int MERGE = 7; ]]\)=F`n77
public final static int IMPROVED_MERGE = 8; H;b8I
public final static int HEAP = 9; tn"Y9 k|
ATKYjhc _
public static void sort(int[] data) { ^zvA?'s
sort(data, IMPROVED_QUICK); JN{<oxI
} :hC {5!|
private static String[] name={ v9Z lNA7m!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1 ;_{US5FR
}; `V]egdO
u&1j>`~qJ
private static Sort[] impl=new Sort[]{ =nJOaXR0
new InsertSort(), g2+l@$W
new BubbleSort(), XD;15a
new SelectionSort(), :*mA,2s
new ShellSort(), e*Uz#w:
new QuickSort(), l84h%,
new ImprovedQuickSort(), a9yIV5_N
new MergeSort(), ArNur~
new ImprovedMergeSort(), 2(c<U6#C'l
new HeapSort() c'4>D,?1
}; @?<N +qdH>
&/B2)l6a
public static String toString(int algorithm){ yf `.%
return name[algorithm-1]; 3S[w'
} Fv?R\`52u
8vz_~p9%j
public static void sort(int[] data, int algorithm) { gGtep*k
impl[algorithm-1].sort(data); YH/S2D
} !Z#_X@NFc
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public static interface Sort { anHBySI3
public void sort(int[] data); hKk\Y{wv'
} *23m-
1_Dn?G^H
public static void swap(int[] data, int i, int j) { .yctE:n
int temp = data; t] n(5!L(
data = data[j]; Y0/jH2n
data[j] = temp; '_q: vjX
} _Vdb?
} @D.R0uM