[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; j83p[qR7o
} G_AAE#r`
int i1=l; possM'vC
int i2=mid+1; &"^A
for(int cur=l;cur<=r;cur++){ t-E'foYfr`
if(i1==mid+1) gXH89n
data[cur]=temp[i2++]; 8n&",)U
else if(i2>r) EkTen:{G
data[cur]=temp[i1++]; P, S9gG9
else if(temp[i1] data[cur]=temp[i1++]; 4AF"+L
else }.T$bj1B;V
data[cur]=temp[i2++]; ,;D74h2F
} Rj E,Wn
} >StvP=our
1eb1Lvn
} =,0E3:X^
5<#H=A~(
改进后的归并排序: ?W(wtp,o
:fj}J)9'xW
package org.rut.util.algorithm.support; ; 9'*w=V
UT^t7MY#O
import org.rut.util.algorithm.SortUtil; <!w-op2@ir
Dri1A%
/** txL5'mK
* @author treeroot <edAWc+
* @since 2006-2-2 H%%#^rb^
* @version 1.0 }"cb^3
*/ 2%@j<yS
public class ImprovedMergeSort implements SortUtil.Sort { =6+BBD
G:@gO2(D
private static final int THRESHOLD = 10; sV77WF
XhIgzaGVu
/* 47icy-@kg
* (non-Javadoc) 0kiW629o
* Rw. Uz&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L)w& f
*/ ~F' $p
public void sort(int[] data) { \!YPht
int[] temp=new int[data.length]; nFB;!r
mergeSort(data,temp,0,data.length-1); -D(UbkPw
} FlkAo]
?Z14l0iZ%d
private void mergeSort(int[] data, int[] temp, int l, int r) { ucA6s:!={
int i, j, k; 1C|j<w=i
int mid = (l + r) / 2; ]1Q\wsB
if (l == r) 3cfkJ|fuwe
return; O%+:fJz6wI
if ((mid - l) >= THRESHOLD) m&$H?yXW>
mergeSort(data, temp, l, mid); Z-vzq;
else ,,G0}N@7s
insertSort(data, l, mid - l + 1); U2Ur N?T
if ((r - mid) > THRESHOLD) )FHaJ*&d
mergeSort(data, temp, mid + 1, r); M(2[X/t
else h+Z|s
insertSort(data, mid + 1, r - mid); -6H)GK14b
JdV!m`XpXy
for (i = l; i <= mid; i++) { z2dM*NMK
temp = data; pCC0:
} YTGup]d
for (j = 1; j <= r - mid; j++) { +"p",Z
temp[r - j + 1] = data[j + mid]; ]XP[tLYY
} vG
int a = temp[l]; =)bZSb"<"
int b = temp[r]; z_Qw's
for (i = l, j = r, k = l; k <= r; k++) { |H@M-
if (a < b) { ~XZ1,2jA/
data[k] = temp[i++]; B\("08x
a = temp; dj]sr!q+
} else { Nf;vUYP
data[k] = temp[j--]; TvQAy/Y0
b = temp[j]; <"\K|2Sg
} APLu?wy7s5
} +ATN2 o
} .:lzT"QXI
D<rjxP
/** 7)a=B! 8M
* @param data A+ f{j
* @param l *v8 ]99N
* @param i -J[D:P.Z
*/ a.Mp1W
private void insertSort(int[] data, int start, int len) { G;^iwxzhO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Cu`ZgKLQ
} c~tkY!c
} 2'x_zMV
} P, Vq/Tt
} j$L<9(DoR
xw=B4u'z
堆排序： A2+t`[w
d?S<h`{x
package org.rut.util.algorithm.support; 7C 4Njei"
Np=*B_ @8
import org.rut.util.algorithm.SortUtil; U5"F1CaW~
>"Hj=?
/** ]Wy V bIu
* @author treeroot NuP@eeF>,
* @since 2006-2-2 y'+^ ME$H
* @version 1.0 jf%Ydr}`
*/ k5ZwGJ#r
public class HeapSort implements SortUtil.Sort{ =W4cWG?+
d[S!e`,iD
/* (non-Javadoc) ,:v}gS?Uq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )Z^(+
*/ -9Can4
public void sort(int[] data) { w6cPd'
MaxHeap h=new MaxHeap(); _WSJg1
h.init(data); X0U6:
for(int i=0;i h.remove(); L@2H>Lh35
System.arraycopy(h.queue,1,data,0,data.length); s@q54
} {bNnhW*qOu
ct]5\g?U'
private static class MaxHeap{ Y]n^(V
4+W}TKw
void init(int[] data){ V3`*LU
this.queue=new int[data.length+1]; "Srp/g]a
for(int i=0;i queue[++size]=data; N7M^
fixUp(size); )q=1<V44d
} JRo{z{!O6
} V,Gt5lL&/!
aI\VqOt]
private int size=0; -I|yi'
tb=(L
private int[] queue; <<`."RY#0
RSnK`N\9jb
public int get() { /stED{j,
return queue[1]; `Y[zF1$kz^
} M9N|Ql
_{ba
public void remove() { |_ @iaLE
SortUtil.swap(queue,1,size--); gVD!.
fixDown(1); $Z(zO;k.
} r*3;gyG.,#
file://fixdown m.$Oo Mu'
private void fixDown(int k) { {-E{.7
int j; \(z)]D
while ((j = k << 1) <= size) { gr2zt&Z4
if (j < size %26amp;%26amp; queue[j] j++; ,sc>~B@Q
if (queue[k]>queue[j]) file://不用交换 *U]f6Q<X
break; N2~z&y8.
SortUtil.swap(queue,j,k); *i\7dJ Dj
k = j; uUJ2d84tV
} Yw{](qG7e`
} w5[POo' 5
private void fixUp(int k) { w?/,LV
while (k > 1) { r>G$u
int j = k >> 1; %_z]iz4
if (queue[j]>queue[k]) fkI<RgM
break; Zkz:h7GUG-
SortUtil.swap(queue,j,k); @&~BGh
k = j; mDq01fU4
} tL3(( W"
} U "}Kth
Z2`e*c-[E
} MJD4#G
: i(h[0
} z;3}GxE-si
xA-G&oC]<T
SortUtil： {:rU5 !n
())|x[>JS+
package org.rut.util.algorithm; rLVAI#ci=
0p#36czqy
import org.rut.util.algorithm.support.BubbleSort; J:Qp(s-N^:
import org.rut.util.algorithm.support.HeapSort; S1=c_!q%9
import org.rut.util.algorithm.support.ImprovedMergeSort; r|P4|_No
import org.rut.util.algorithm.support.ImprovedQuickSort; dxU[>m;
import org.rut.util.algorithm.support.InsertSort; l p? h~
import org.rut.util.algorithm.support.MergeSort; I,#U _
import org.rut.util.algorithm.support.QuickSort; \"lzmxe0p
import org.rut.util.algorithm.support.SelectionSort; Zc"]Cv(
import org.rut.util.algorithm.support.ShellSort; 7_{x '#7
7.=u:PK7kM
/** ``NjNd
* @author treeroot `=\G>#p<T
* @since 2006-2-2 Kc(_?`
* @version 1.0 c"QI`;D_c
*/ 16]O^R;r
public class SortUtil { ^*0;Z<_
public final static int INSERT = 1; =B/^c>w2
public final static int BUBBLE = 2; ngNg1zV/q
public final static int SELECTION = 3; \/,SH?>4x
public final static int SHELL = 4; %%f=aPw
public final static int QUICK = 5; %bv<OMD
public final static int IMPROVED_QUICK = 6; OrH&dY
public final static int MERGE = 7; B8P%4@T
public final static int IMPROVED_MERGE = 8; JD'/m hN0
public final static int HEAP = 9; !k[zUti
M35}5+
public static void sort(int[] data) { >DV0!'jW
sort(data, IMPROVED_QUICK); [Y:HVr,
} --]\z*x
private static String[] name={ ~#-`Qh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "zv+|_ZAfd
}; $]hf2Yr(
))MP]j9 T
private static Sort[] impl=new Sort[]{ BY 1~\M
new InsertSort(), S#""((U$
new BubbleSort(), CsE|pXVG
new SelectionSort(), HPgMVp'
new ShellSort(), WUxr@0
new QuickSort(), p;B +g X
new ImprovedQuickSort(), jLEU V
new MergeSort(), =N3~2=g~A
new ImprovedMergeSort(), Mr&]RTEE
new HeapSort() gNO$WY^
}; :bh[6F
FTB"C[>
public static String toString(int algorithm){ lF#Kg!-l
return name[algorithm-1]; 0m@S+$v
} !X,S2-}"
.a^/r'?
public static void sort(int[] data, int algorithm) { A8A+ImwO"
impl[algorithm-1].sort(data); uIba{9tM"P
} RJ-CWt [LG
*}0Q S@FN
public static interface Sort { me9RnPe:
public void sort(int[] data); )WzCUYE1/
} qVY\5`f@
`C=p7%
public static void swap(int[] data, int i, int j) { m+!%+S1
int temp = data; J^?O]|
data = data[j]; >:K3y$]_
data[j] = temp; c1z5t]d
} N1SRnJu<f
} / )EB~|4']