[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; p Dg!Cs
} io"NqR#"v
int i1=l; zp4@T)
int i2=mid+1; ;B<rw^h5
for(int cur=l;cur<=r;cur++){ + S5uxO
if(i1==mid+1) Tq^B>{S"
data[cur]=temp[i2++]; (^T}6t3+4
else if(i2>r) ZCK#=:ln
data[cur]=temp[i1++]; ^-Ks_4
else if(temp[i1] data[cur]=temp[i1++]; AN,3[Sh
else s!W{ru
data[cur]=temp[i2++]; {y|.y~vW
} }<z[t5
} JFu.o8[Q
&~<i" W
} +pUYFDwFx
lib^JJF
改进后的归并排序: (w_b
! qtj1.w
package org.rut.util.algorithm.support; /2r&ga&
fyZtwl@6w#
import org.rut.util.algorithm.SortUtil; dXWG`G_
E-X02A
/** @CPkP
* @author treeroot :3se/4y}
* @since 2006-2-2 'D[ *|Qcy
* @version 1.0 XThU+s9
*/ Us6~7L00
public class ImprovedMergeSort implements SortUtil.Sort { lh\`9F:
uI)z4Z
private static final int THRESHOLD = 10; 0m4#{^Y
l7WZ" 6d
/* /w5c:BH
* (non-Javadoc) %}
* yp hd'Pu"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q@mZ0D-
*/ @Us#c 7/
public void sort(int[] data) { Sw{rNzh%$
int[] temp=new int[data.length]; C:!&g~{cKi
mergeSort(data,temp,0,data.length-1); fX LsLh+~D
} I]#x0?D
D.F1^9Q
private void mergeSort(int[] data, int[] temp, int l, int r) { 3ug>,1:6-
int i, j, k; 2_6@&2
int mid = (l + r) / 2; g|]Hm*
if (l == r) pBVzmQF
return; ASS<XNP
if ((mid - l) >= THRESHOLD) gsIp y
mergeSort(data, temp, l, mid); 3!KyO)8
else *TL3-S?
insertSort(data, l, mid - l + 1); So NgDFD
if ((r - mid) > THRESHOLD) wG 5H^>6u>
mergeSort(data, temp, mid + 1, r); x` 4|^u
else 4{$ L]toP
insertSort(data, mid + 1, r - mid); 43`Atw`\
;P8.U(
for (i = l; i <= mid; i++) { YRaF@?^Gn
temp = data; Vvn~G.&)
} <P5 7s+JK
for (j = 1; j <= r - mid; j++) { I0bkc3
temp[r - j + 1] = data[j + mid]; tB0f+ wC
} SphP@J<ONW
int a = temp[l]; w\JTMS$
int b = temp[r]; &61h*s
for (i = l, j = r, k = l; k <= r; k++) { -9 |)O:
if (a < b) { 4?`*#DPl
data[k] = temp[i++]; f 0/q{*
a = temp; _k)EqPYu@
} else { }o=s"0a
data[k] = temp[j--]; 3|Y.+W
b = temp[j]; BS?rKtdm(
} _:XX+3W7
} gp\o|igT
} %pxHGO=)E
%8KbVjn
/** cS",Bw\
* @param data 5n=~l[O
* @param l wWJM./y
* @param i -+Ox/>k
*/ ocj^mxh=O
private void insertSort(int[] data, int start, int len) { *Fd(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZjgfkZAS
} r#mH[|@W~
} G'iE`4`2
} tRR<4}4R
} .A7ON1lc^C
iT~ gt/K
堆排序： k~iA'E0-
jq[Q>"f
package org.rut.util.algorithm.support; .|LY /q\A
,/-DAo~O
import org.rut.util.algorithm.SortUtil; Zu ![v0
I5E4mv0<i
/** E`q)vk
* @author treeroot fTI~wF8!
* @since 2006-2-2 kI^Pu
* @version 1.0 \lpvRZ\L&g
*/ 9!Bz)dJ3
public class HeapSort implements SortUtil.Sort{ #@cEJV;5"
zE=^}K+
/* (non-Javadoc) h(FFG%H(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z"9D1Uk
*/ Oz5Ze/HBN
public void sort(int[] data) { j[$+hh3:
MaxHeap h=new MaxHeap(); RAoY`AWI
h.init(data); q:P44`Aq
for(int i=0;i h.remove(); rVb61$
System.arraycopy(h.queue,1,data,0,data.length); }ho6
} !h+VbZ
#PMi6q~Z
private static class MaxHeap{ Gr|102
K1*V\WRW5
void init(int[] data){ _lZWy$rm%
this.queue=new int[data.length+1]; d?jzh1
for(int i=0;i queue[++size]=data; ej]>*n
fixUp(size); 'Fa~l'G7X
} cx+%lco!
} TxmKmZ u
iRI7x)^0"z
private int size=0; 0PJ7o#}_{@
{xQ(xy
private int[] queue; "tU,.U
:w26d-QR(
public int get() { 3W@ta1
return queue[1]; ;TCT%j`^o
} 3\?yjL^
6;}W)S
public void remove() { y.WEO>
SortUtil.swap(queue,1,size--); wGx*Xy1n<
fixDown(1); q4KYC!b
} Z:<6Ck
file://fixdown NfXEW-
private void fixDown(int k) { j.g9O]pi
int j; 71k>_'fl
while ((j = k << 1) <= size) { zy@ nBi^
if (j < size %26amp;%26amp; queue[j] j++; dJ=z'?|%g
if (queue[k]>queue[j]) file://不用交换 'n7Ld6%1
break; 7HEUmKb"
SortUtil.swap(queue,j,k); Kw&t\},8@
k = j; { VFr8F0*H
} |BE`ASW;
} K7]+. f
private void fixUp(int k) { *l8:%t\
while (k > 1) { t|cTl/i 4
int j = k >> 1; u\}"l2 r
if (queue[j]>queue[k]) Xs$UpQo
break; Mzj|57:gx
SortUtil.swap(queue,j,k); "S0WFP\P+
k = j; Tf.DFfV#y
} Yi#U~ h
} M>|R&v
eW;0{P
} p7]V1w:
sEEyN3 N
} z-;{pPZ
5VK.Zs\
SortUtil： +{H0$4y
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package org.rut.util.algorithm; >vc$3%L[$
VK]sK e
import org.rut.util.algorithm.support.BubbleSort; s92SN F}g
import org.rut.util.algorithm.support.HeapSort; 2sahb#e )
import org.rut.util.algorithm.support.ImprovedMergeSort; rI;tMNs
import org.rut.util.algorithm.support.ImprovedQuickSort; g+/m:(7[s|
import org.rut.util.algorithm.support.InsertSort; |Fp+9U
import org.rut.util.algorithm.support.MergeSort; 4xzoA'Mb@
import org.rut.util.algorithm.support.QuickSort; lb<D,&+
import org.rut.util.algorithm.support.SelectionSort; 61&A`
import org.rut.util.algorithm.support.ShellSort; 4Y4QR[>IU3
pJ3Yjm[l
/** (z.eXoP@>
* @author treeroot ibQN pIz
* @since 2006-2-2 M}xyW"yp
* @version 1.0 J(=io_\bO
*/ <%:,{u6
public class SortUtil { h4k.1yH;
public final static int INSERT = 1; rnS&^
public final static int BUBBLE = 2; W60C$*h
public final static int SELECTION = 3; +|TFxaVz
public final static int SHELL = 4; RP~ hi%A
public final static int QUICK = 5; fHR^?\VVp
public final static int IMPROVED_QUICK = 6; Ig"QwvR
public final static int MERGE = 7; h][$1b&B
public final static int IMPROVED_MERGE = 8; <~R{U>zO
public final static int HEAP = 9; 0iTh |K0
m}o4Vr;"
public static void sort(int[] data) { ;]sbz4?
sort(data, IMPROVED_QUICK); &u~#bDh
} clO9l=g
private static String[] name={ h!q_''*;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "vN~7%
}; hYEUiQ
2s<uT
private static Sort[] impl=new Sort[]{ Zsx\GeE%:
new InsertSort(), ])H[>.?K
new BubbleSort(), XPsRa[08WK
new SelectionSort(), .|z8WF*
new ShellSort(), j55;E E!
new QuickSort(), J0O wzO
new ImprovedQuickSort(), xty)*$C>
new MergeSort(), w4(g]9^Q
new ImprovedMergeSort(), I/ V`@*/+
new HeapSort() ;FO( mL(
}; |++\"g
#Zt(g(T
public static String toString(int algorithm){ e|S_B*1*0
return name[algorithm-1]; iFkXt<_A
} _2E*
}>< v7
public static void sort(int[] data, int algorithm) { qpXsQim$~
impl[algorithm-1].sort(data); R.$1aqA}
} L@>$ Aw
x4%1P w
public static interface Sort { [ T!0ka
public void sort(int[] data); d@e2+3<
} *dmS'/
RSK5 }2
public static void swap(int[] data, int i, int j) { 1?,1EYT"
int temp = data; -wrVhCd~g]
data = data[j]; j$Wd[Ja+O
data[j] = temp; lmpBf{~ S
} 8m"jd+
} '4]_~?&x