[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; }c4E 2c
} i @9Qb
int i1=l; 1qj%a%R
int i2=mid+1; -`dxx)x
for(int cur=l;cur<=r;cur++){ 9/daRq$
if(i1==mid+1) pq?[wp"
data[cur]=temp[i2++]; HwW[M[qA
else if(i2>r) @MZ6E$I
data[cur]=temp[i1++]; d50IAa^p6J
else if(temp[i1] data[cur]=temp[i1++]; ru/zLj:
else RO$@>vL
data[cur]=temp[i2++]; .;Utkf'I
} mXU?+G0
} <]Pix)
EB2^]?
} ,rFLpQl
k]$E8[.t
改进后的归并排序: YY:iPaGO
O3C)N I\i
package org.rut.util.algorithm.support; x|v[Dxf]
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import org.rut.util.algorithm.SortUtil; ccN&h
t66f 7AR
/** m>uI\OY{n
* @author treeroot iTugvb
* @since 2006-2-2 )|Vg/S
* @version 1.0 TFJ{fLG
*/ ZU|V+yT
public class ImprovedMergeSort implements SortUtil.Sort { 8g# Y
mU?&\w=v$
private static final int THRESHOLD = 10; yToT7 X7F7
-Ty<9(~S
/* a(x.{}uG,
* (non-Javadoc) yA!3XUi
* XgiI6-B~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M=\d_O#;Z
*/ 3)C6OF>7
public void sort(int[] data) { z6FbM^;;
int[] temp=new int[data.length]; kKxL04
mergeSort(data,temp,0,data.length-1); c+E//X|
} } Jdh^t.
~4=]%XYz
private void mergeSort(int[] data, int[] temp, int l, int r) { A{i][1N
int i, j, k; 9{9#AI.G
int mid = (l + r) / 2; f*|8n$%
if (l == r) Qe @A5#
return; d6t)gG*5
if ((mid - l) >= THRESHOLD) nJldz;
mergeSort(data, temp, l, mid); .\ ;l-U
else @b::6n/u
insertSort(data, l, mid - l + 1); "%.|n|
if ((r - mid) > THRESHOLD) a!c/5)v(
mergeSort(data, temp, mid + 1, r); +X* F<6mZ
else m{:"1]
insertSort(data, mid + 1, r - mid); a gmeiJT
r!=]Q}`F
for (i = l; i <= mid; i++) { nR,Qm=;
temp = data; Hl^aUp.c
} i$`|Y*
for (j = 1; j <= r - mid; j++) { c{'$=lR "
temp[r - j + 1] = data[j + mid]; Eonq'Re$
} /gqqKUx
int a = temp[l]; N<L$gw+)$D
int b = temp[r]; L<f-Ed9|
for (i = l, j = r, k = l; k <= r; k++) { W;3 R;
if (a < b) { #6*V7@9]3|
data[k] = temp[i++]; \S=XIf
a = temp; pTa'.m
} else { 1zb$5{,|
data[k] = temp[j--]; '+)6#/*
b = temp[j]; +?URVp
} ?dp-}3/G
} |QnUK5D$
} rtB|N-
&_Cxv8
/** S2koXg(
* @param data C$]5l;`
* @param l B]'e$uyL7
* @param i /`7 IK
*/ u~#%P&3_W
private void insertSort(int[] data, int start, int len) { t!6\7Vm/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z{Hz;m:*_
} ]sX7%3P
} 68vxI|EZ
} 3mpP|b"
} C#A@)>
#Y;.>mF
堆排序： I?f"<5[0
yQu vW$
package org.rut.util.algorithm.support; rER~P\-
@Djs[Cs<*
import org.rut.util.algorithm.SortUtil; 1t0bUf;(M
q:xtm?'$
/** y.jS{r".
* @author treeroot /DLr(
* @since 2006-2-2 * zd.
* @version 1.0 {&u Rd?(
*/ u=(H#o<#
public class HeapSort implements SortUtil.Sort{ =Ov9Kf
PqTYAN&F
/* (non-Javadoc) S|l&fb n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g;$E1U=R-E
*/ @[n2dmj
public void sort(int[] data) { CKJAZ2
MaxHeap h=new MaxHeap(); RI?NB6U
h.init(data); ]a8eDy
for(int i=0;i h.remove(); wUbmzP.
System.arraycopy(h.queue,1,data,0,data.length); H!p!sn
} *zJD$+Fo
CP}0Ri)
private static class MaxHeap{ C,[L/!
x<8\-
void init(int[] data){ X)I/%{
this.queue=new int[data.length+1]; &u&2D$K,tp
for(int i=0;i queue[++size]=data; AlUJ1^o)
fixUp(size); [70Y,,w
} pH^ z
} K/DH / r
JAN|aCzD
private int size=0; AmZuo_
AD(xaQ&T
private int[] queue; x 96}#0'
5Lw{0uLr
public int get() { *<w3" iq
return queue[1]; <Uf|PFVj$
} sbzeY1
D^$]>-^
public void remove() { bH_I7G&m
SortUtil.swap(queue,1,size--); se!g4XEWD
fixDown(1); P?xA$_+
} nz>K{(
file://fixdown CK=ARh#|
private void fixDown(int k) { Kf|0*c
int j; CDJ$hu
while ((j = k << 1) <= size) { #iiwD|
if (j < size %26amp;%26amp; queue[j] j++; cFw3Iw"JJ
if (queue[k]>queue[j]) file://不用交换 Urn
break; 1p~5h(jI
SortUtil.swap(queue,j,k); m.!wsw
k = j; 5|5=Y/
} D6Dn&/>Zp
} )x)gHY8;
private void fixUp(int k) { s~=g*99H
while (k > 1) { c+H)ed>
int j = k >> 1; ]/a g*F
if (queue[j]>queue[k]) lz- iCZ
break; f P+QxOz
SortUtil.swap(queue,j,k); NfOp=X?Y
k = j; C]M7GHe1q
} 2HSb.&7-G
} %oR>Uo
loLKm]yV
} pG~'shD~Dn
/;7ID41
} v O PMgEI
y^SyhG,V[
SortUtil： {-J:4*`
- {0g#G
package org.rut.util.algorithm; K|Om5 p
xuF5/(__
import org.rut.util.algorithm.support.BubbleSort; {79qtq%W{
import org.rut.util.algorithm.support.HeapSort; 2Sjt=LOc="
import org.rut.util.algorithm.support.ImprovedMergeSort; S{-f$Q*
import org.rut.util.algorithm.support.ImprovedQuickSort; ",T`\8&@e
import org.rut.util.algorithm.support.InsertSort; svqvG7
import org.rut.util.algorithm.support.MergeSort; tq0;^L
import org.rut.util.algorithm.support.QuickSort; .x>HA^4
import org.rut.util.algorithm.support.SelectionSort; m!0N"AjA
import org.rut.util.algorithm.support.ShellSort; BD4`eiu"
0`6),R'x
/** h mds(lv7
* @author treeroot ?|lIXz
* @since 2006-2-2 %2}C'MqS
* @version 1.0 5=Suj*s{D#
*/ Oi6Eo~\f
public class SortUtil { RT/qcS^Oz
public final static int INSERT = 1; "Tv:*L5
public final static int BUBBLE = 2; Qww^P/vm
public final static int SELECTION = 3; ODek%0=
public final static int SHELL = 4; mTJ"l(,3
public final static int QUICK = 5; >K5~:mx#3
public final static int IMPROVED_QUICK = 6; *<xrp*O
public final static int MERGE = 7; |_, /u_
public final static int IMPROVED_MERGE = 8; Gnk|^i;t
public final static int HEAP = 9; 4~Dax)
@+:4J_N
public static void sort(int[] data) { SHwRX? B|
sort(data, IMPROVED_QUICK); K\aAM;)-
} gJk[Ja
private static String[] name={ rd">JEK;;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .yX>.>"T|
}; Dp`HeSKU^
~{P:sjsU
private static Sort[] impl=new Sort[]{ 4\HsU9x
new InsertSort(), z&>|*C.Y
new BubbleSort(), 5uttv:@=
new SelectionSort(), V_f`0\[x
new ShellSort(), +6oG@
new QuickSort(), {>h97}P
new ImprovedQuickSort(), `s%QeAde
new MergeSort(), U!0E_J
new ImprovedMergeSort(), e3g_At\
new HeapSort() 7*;^UqGjz
}; Ka.Nr@Rq*~
gz4UV/qr/
public static String toString(int algorithm){ a:b^!H>#
return name[algorithm-1]; lhxdx
} wS%zWdsz
5(#-)rlGj
public static void sort(int[] data, int algorithm) { SX_4=^
impl[algorithm-1].sort(data); !+KhFC&Py
} !^L-T?y.2
W+hV9
public static interface Sort { P#*n3&Uu
public void sort(int[] data); c3W BALdh
} B6%&gXr\
_Ex|f5+
public static void swap(int[] data, int i, int j) { .Q[yD<)Ubs
int temp = data; u5F}(+4r
data = data[j]; Q7(eq0na
data[j] = temp; *<q4S(l
} !Rqx2Q
} g`3H(PVg